From 8a2e67e0d0826f73531f79ecc8d14aba71a8d837 Mon Sep 17 00:00:00 2001 From: Josh Triplett Date: Thu, 29 Apr 2021 13:11:20 -0700 Subject: [PATCH 01/18] Simplify chdir implementation and minimize unsafe block --- library/std/src/sys/unix/os.rs | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/library/std/src/sys/unix/os.rs b/library/std/src/sys/unix/os.rs index 984c08c2ad531..51c3e5d175cca 100644 --- a/library/std/src/sys/unix/os.rs +++ b/library/std/src/sys/unix/os.rs @@ -155,12 +155,10 @@ pub fn getcwd() -> io::Result { pub fn chdir(p: &path::Path) -> io::Result<()> { let p: &OsStr = p.as_ref(); let p = CString::new(p.as_bytes())?; - unsafe { - match libc::chdir(p.as_ptr()) == (0 as c_int) { - true => Ok(()), - false => Err(io::Error::last_os_error()), - } + if unsafe { libc::chdir(p.as_ptr()) } != 0 { + return Err(io::Error::last_os_error()); } + Ok(()) } pub struct SplitPaths<'a> { From fe68b1ab327297fea9ed2fb273fe0a7ac5aedfdd Mon Sep 17 00:00:00 2001 From: Daniel Silverman Date: Fri, 30 Apr 2021 15:53:14 -0700 Subject: [PATCH 02/18] Fix linker_args with --target=sparcv9-sun-solaris Moved -z ignore to add_as_needed Trying to cross-compile for sparcv9-sun-solaris getting an error message for -zignore Introduced when -z -ignore was separated here 22d0ab0 No formatting done Reproduce ``` bash rustup target add sparcv9-sun-solaris cargo new --bin hello && cd hello && cargo run --target=sparcv9-sun-solaris ``` config.toml [target.sparcv9-sun-solaris] linker = "gcc" --- compiler/rustc_codegen_ssa/src/back/linker.rs | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/compiler/rustc_codegen_ssa/src/back/linker.rs b/compiler/rustc_codegen_ssa/src/back/linker.rs index 77d8ab49ff258..8ba124a1fa88c 100644 --- a/compiler/rustc_codegen_ssa/src/back/linker.rs +++ b/compiler/rustc_codegen_ssa/src/back/linker.rs @@ -432,8 +432,6 @@ impl<'a> Linker for GccLinker<'a> { // insert it here. if self.sess.target.is_like_osx { self.linker_arg("-dead_strip"); - } else if self.sess.target.is_like_solaris { - self.linker_arg("-zignore"); // If we're building a dylib, we don't use --gc-sections because LLVM // has already done the best it can do, and we also don't want to @@ -655,6 +653,10 @@ impl<'a> Linker for GccLinker<'a> { fn add_as_needed(&mut self) { if self.sess.target.linker_is_gnu { self.linker_arg("--as-needed"); + } else if self.sess.target.is_like_solaris { + // -z ignore is the Solaris equivalent to the GNU ld --as-needed option + self.linker_arg("-z"); + self.linker_arg("ignore"); } } } From 0b0d293c7c46bdadf80e5304a667e34c53c0cf7e Mon Sep 17 00:00:00 2001 From: Rich Kadel Date: Sat, 1 May 2021 14:56:48 -0700 Subject: [PATCH 03/18] Report coverage `0` of dead blocks Fixes: #84018 With `-Z instrument-coverage`, coverage reporting of dead blocks (for example, blocks dropped because a conditional branch is dropped, based on const evaluation) is now supported. If `instrument-coverage` is enabled, `simplify::remove_dead_blocks()` finds all dropped coverage `Statement`s and adds their `code_region`s as `Unreachable` coverage `Statement`s to the `START_BLOCK`, so they are still included in the coverage map. Check out the resulting changes in the test coverage reports in this PR. --- .../rustc_mir/src/transform/const_goto.rs | 2 +- .../src/transform/deduplicate_blocks.rs | 2 +- .../src/transform/early_otherwise_branch.rs | 2 +- compiler/rustc_mir/src/transform/generator.rs | 4 +- compiler/rustc_mir/src/transform/inline.rs | 2 +- .../rustc_mir/src/transform/match_branches.rs | 2 +- .../transform/multiple_return_terminators.rs | 2 +- .../src/transform/remove_unneeded_drops.rs | 2 +- compiler/rustc_mir/src/transform/simplify.rs | 42 ++++++++++++++++--- .../rustc_mir/src/transform/simplify_try.rs | 2 +- .../src/transform/unreachable_prop.rs | 2 +- .../expected_show_coverage.async2.txt | 1 + .../expected_show_coverage.conditions.txt | 8 +++- .../expected_show_coverage.doctest.txt | 4 +- .../expected_show_coverage.drop_trait.txt | 10 ++--- .../expected_show_coverage.generics.txt | 18 ++++---- .../expected_show_coverage.loops_branches.txt | 38 ++++++++--------- .../expected_show_coverage.tight_inf_loop.txt | 2 +- .../run-make-fulldeps/coverage/conditions.rs | 4 +- .../run-make-fulldeps/coverage/generics.rs | 10 ++--- .../coverage/loops_branches.rs | 8 ++-- 21 files changed, 102 insertions(+), 65 deletions(-) diff --git a/compiler/rustc_mir/src/transform/const_goto.rs b/compiler/rustc_mir/src/transform/const_goto.rs index b5c8b4bebc360..ba10b54c5ae2e 100644 --- a/compiler/rustc_mir/src/transform/const_goto.rs +++ b/compiler/rustc_mir/src/transform/const_goto.rs @@ -47,7 +47,7 @@ impl<'tcx> MirPass<'tcx> for ConstGoto { // if we applied optimizations, we potentially have some cfg to cleanup to // make it easier for further passes if should_simplify { - simplify_cfg(body); + simplify_cfg(tcx, body); simplify_locals(body, tcx); } } diff --git a/compiler/rustc_mir/src/transform/deduplicate_blocks.rs b/compiler/rustc_mir/src/transform/deduplicate_blocks.rs index c41e71e09a4ef..912505c65983e 100644 --- a/compiler/rustc_mir/src/transform/deduplicate_blocks.rs +++ b/compiler/rustc_mir/src/transform/deduplicate_blocks.rs @@ -26,7 +26,7 @@ impl<'tcx> MirPass<'tcx> for DeduplicateBlocks { if has_opts_to_apply { let mut opt_applier = OptApplier { tcx, duplicates }; opt_applier.visit_body(body); - simplify_cfg(body); + simplify_cfg(tcx, body); } } } diff --git a/compiler/rustc_mir/src/transform/early_otherwise_branch.rs b/compiler/rustc_mir/src/transform/early_otherwise_branch.rs index f7ea9faec4728..ac39206623308 100644 --- a/compiler/rustc_mir/src/transform/early_otherwise_branch.rs +++ b/compiler/rustc_mir/src/transform/early_otherwise_branch.rs @@ -164,7 +164,7 @@ impl<'tcx> MirPass<'tcx> for EarlyOtherwiseBranch { // Since this optimization adds new basic blocks and invalidates others, // clean up the cfg to make it nicer for other passes if should_cleanup { - simplify_cfg(body); + simplify_cfg(tcx, body); } } } diff --git a/compiler/rustc_mir/src/transform/generator.rs b/compiler/rustc_mir/src/transform/generator.rs index 003003a8abbea..3560b4b1e8645 100644 --- a/compiler/rustc_mir/src/transform/generator.rs +++ b/compiler/rustc_mir/src/transform/generator.rs @@ -964,7 +964,7 @@ fn create_generator_drop_shim<'tcx>( // Make sure we remove dead blocks to remove // unrelated code from the resume part of the function - simplify::remove_dead_blocks(&mut body); + simplify::remove_dead_blocks(tcx, &mut body); dump_mir(tcx, None, "generator_drop", &0, &body, |_, _| Ok(())); @@ -1137,7 +1137,7 @@ fn create_generator_resume_function<'tcx>( // Make sure we remove dead blocks to remove // unrelated code from the drop part of the function - simplify::remove_dead_blocks(body); + simplify::remove_dead_blocks(tcx, body); dump_mir(tcx, None, "generator_resume", &0, body, |_, _| Ok(())); } diff --git a/compiler/rustc_mir/src/transform/inline.rs b/compiler/rustc_mir/src/transform/inline.rs index b6f80763bc8c4..f1c95a84ade85 100644 --- a/compiler/rustc_mir/src/transform/inline.rs +++ b/compiler/rustc_mir/src/transform/inline.rs @@ -57,7 +57,7 @@ impl<'tcx> MirPass<'tcx> for Inline { if inline(tcx, body) { debug!("running simplify cfg on {:?}", body.source); CfgSimplifier::new(body).simplify(); - remove_dead_blocks(body); + remove_dead_blocks(tcx, body); } } } diff --git a/compiler/rustc_mir/src/transform/match_branches.rs b/compiler/rustc_mir/src/transform/match_branches.rs index f7a9835353e5c..21b208a08c2dc 100644 --- a/compiler/rustc_mir/src/transform/match_branches.rs +++ b/compiler/rustc_mir/src/transform/match_branches.rs @@ -167,7 +167,7 @@ impl<'tcx> MirPass<'tcx> for MatchBranchSimplification { } if should_cleanup { - simplify_cfg(body); + simplify_cfg(tcx, body); } } } diff --git a/compiler/rustc_mir/src/transform/multiple_return_terminators.rs b/compiler/rustc_mir/src/transform/multiple_return_terminators.rs index 4aaa0baa9f46a..cd2db18055286 100644 --- a/compiler/rustc_mir/src/transform/multiple_return_terminators.rs +++ b/compiler/rustc_mir/src/transform/multiple_return_terminators.rs @@ -38,6 +38,6 @@ impl<'tcx> MirPass<'tcx> for MultipleReturnTerminators { } } - simplify::remove_dead_blocks(body) + simplify::remove_dead_blocks(tcx, body) } } diff --git a/compiler/rustc_mir/src/transform/remove_unneeded_drops.rs b/compiler/rustc_mir/src/transform/remove_unneeded_drops.rs index 5144d48750de7..02e45021a0aaf 100644 --- a/compiler/rustc_mir/src/transform/remove_unneeded_drops.rs +++ b/compiler/rustc_mir/src/transform/remove_unneeded_drops.rs @@ -36,7 +36,7 @@ impl<'tcx> MirPass<'tcx> for RemoveUnneededDrops { // if we applied optimizations, we potentially have some cfg to cleanup to // make it easier for further passes if should_simplify { - simplify_cfg(body); + simplify_cfg(tcx, body); } } } diff --git a/compiler/rustc_mir/src/transform/simplify.rs b/compiler/rustc_mir/src/transform/simplify.rs index 65e2d096b2094..63373b0cffbb0 100644 --- a/compiler/rustc_mir/src/transform/simplify.rs +++ b/compiler/rustc_mir/src/transform/simplify.rs @@ -29,6 +29,7 @@ use crate::transform::MirPass; use rustc_index::vec::{Idx, IndexVec}; +use rustc_middle::mir::coverage::*; use rustc_middle::mir::visit::{MutVisitor, MutatingUseContext, PlaceContext, Visitor}; use rustc_middle::mir::*; use rustc_middle::ty::TyCtxt; @@ -46,9 +47,9 @@ impl SimplifyCfg { } } -pub fn simplify_cfg(body: &mut Body<'_>) { +pub fn simplify_cfg(tcx: TyCtxt<'tcx>, body: &mut Body<'_>) { CfgSimplifier::new(body).simplify(); - remove_dead_blocks(body); + remove_dead_blocks(tcx, body); // FIXME: Should probably be moved into some kind of pass manager body.basic_blocks_mut().raw.shrink_to_fit(); @@ -59,9 +60,9 @@ impl<'tcx> MirPass<'tcx> for SimplifyCfg { Cow::Borrowed(&self.label) } - fn run_pass(&self, _tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) { + fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) { debug!("SimplifyCfg({:?}) - simplifying {:?}", self.label, body.source); - simplify_cfg(body); + simplify_cfg(tcx, body); } } @@ -286,7 +287,7 @@ impl<'a, 'tcx> CfgSimplifier<'a, 'tcx> { } } -pub fn remove_dead_blocks(body: &mut Body<'_>) { +pub fn remove_dead_blocks(tcx: TyCtxt<'tcx>, body: &mut Body<'_>) { let reachable = traversal::reachable_as_bitset(body); let num_blocks = body.basic_blocks().len(); if num_blocks == reachable.count() { @@ -306,6 +307,11 @@ pub fn remove_dead_blocks(body: &mut Body<'_>) { } used_blocks += 1; } + + if tcx.sess.instrument_coverage() { + save_unreachable_coverage(basic_blocks, used_blocks); + } + basic_blocks.raw.truncate(used_blocks); for block in basic_blocks { @@ -315,6 +321,32 @@ pub fn remove_dead_blocks(body: &mut Body<'_>) { } } +fn save_unreachable_coverage( + basic_blocks: &mut IndexVec>, + first_dead_block: usize, +) { + // retain coverage info for dead blocks, so coverage reports will still + // report `0` executions for the uncovered code regions. + let mut dropped_coverage = Vec::new(); + for dead_block in first_dead_block..basic_blocks.len() { + for statement in basic_blocks[BasicBlock::new(dead_block)].statements.iter() { + if let StatementKind::Coverage(coverage) = &statement.kind { + if let Some(code_region) = &coverage.code_region { + dropped_coverage.push((statement.source_info, code_region.clone())); + } + } + } + } + for (source_info, code_region) in dropped_coverage { + basic_blocks[START_BLOCK].statements.push(Statement { + source_info, + kind: StatementKind::Coverage(box Coverage { + kind: CoverageKind::Unreachable, + code_region: Some(code_region), + }), + }) + } +} pub struct SimplifyLocals; impl<'tcx> MirPass<'tcx> for SimplifyLocals { diff --git a/compiler/rustc_mir/src/transform/simplify_try.rs b/compiler/rustc_mir/src/transform/simplify_try.rs index b42543c04eb3d..c9c4492062720 100644 --- a/compiler/rustc_mir/src/transform/simplify_try.rs +++ b/compiler/rustc_mir/src/transform/simplify_try.rs @@ -558,7 +558,7 @@ impl<'tcx> MirPass<'tcx> for SimplifyBranchSame { if did_remove_blocks { // We have dead blocks now, so remove those. - simplify::remove_dead_blocks(body); + simplify::remove_dead_blocks(tcx, body); } } } diff --git a/compiler/rustc_mir/src/transform/unreachable_prop.rs b/compiler/rustc_mir/src/transform/unreachable_prop.rs index 658c6b6e9db20..e7fb6b4f6b4ad 100644 --- a/compiler/rustc_mir/src/transform/unreachable_prop.rs +++ b/compiler/rustc_mir/src/transform/unreachable_prop.rs @@ -60,7 +60,7 @@ impl MirPass<'_> for UnreachablePropagation { } if replaced { - simplify::remove_dead_blocks(body); + simplify::remove_dead_blocks(tcx, body); } } } diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async2.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async2.txt index 8a445433ab65f..a8c79efd72356 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async2.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async2.txt @@ -12,6 +12,7 @@ 12| 1| if b { 13| 1| println!("non_async_func println in block"); 14| 1| } + ^0 15| 1|} 16| | 17| |// FIXME(#83985): The auto-generated closure in an async function is failing to include diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.conditions.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.conditions.txt index 656a26597759d..2d8a98a5d0c92 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.conditions.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.conditions.txt @@ -5,6 +5,7 @@ 5| 1| if true { 6| 1| countdown = 10; 7| 1| } + ^0 8| | 9| | const B: u32 = 100; 10| 1| let x = if countdown > 7 { @@ -24,6 +25,7 @@ 24| 1| if true { 25| 1| countdown = 10; 26| 1| } + ^0 27| | 28| 1| if countdown > 7 { 29| 1| countdown -= 4; @@ -42,6 +44,7 @@ 41| 1| if true { 42| 1| countdown = 10; 43| 1| } + ^0 44| | 45| 1| if countdown > 7 { 46| 1| countdown -= 4; @@ -54,13 +57,14 @@ 53| | } else { 54| 0| return; 55| | } - 56| | } // Note: closing brace shows uncovered (vs. `0` for implicit else) because condition literal - 57| | // `true` was const-evaluated. The compiler knows the `if` block will be executed. + 56| 0| } + 57| | 58| | 59| 1| let mut countdown = 0; 60| 1| if true { 61| 1| countdown = 1; 62| 1| } + ^0 63| | 64| 1| let z = if countdown > 7 { ^0 diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.doctest.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.doctest.txt index 1b6bb9ff8891d..7ae0e978808e7 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.doctest.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.doctest.txt @@ -9,7 +9,7 @@ 8| 1|//! assert_eq!(1, 1); 9| |//! } else { 10| |//! // this is not! - 11| |//! assert_eq!(1, 2); + 11| 0|//! assert_eq!(1, 2); 12| |//! } 13| 1|//! ``` 14| |//! @@ -84,7 +84,7 @@ 74| 1| if true { 75| 1| assert_eq!(1, 1); 76| | } else { - 77| | assert_eq!(1, 2); + 77| 0| assert_eq!(1, 2); 78| | } 79| 1|} 80| | diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.drop_trait.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.drop_trait.txt index fab5be41901c9..fe6a9e93cbf71 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.drop_trait.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.drop_trait.txt @@ -19,11 +19,11 @@ 19| 1| if true { 20| 1| println!("Exiting with error..."); 21| 1| return Err(1); - 22| | } - 23| | - 24| | let _ = Firework { strength: 1000 }; - 25| | - 26| | Ok(()) + 22| 0| } + 23| 0| + 24| 0| let _ = Firework { strength: 1000 }; + 25| 0| + 26| 0| Ok(()) 27| 1|} 28| | 29| |// Expected program output: diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.generics.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.generics.txt index 7b38ffb87cba8..8e8bc0fd18943 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.generics.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.generics.txt @@ -52,15 +52,15 @@ 30| 1| if true { 31| 1| println!("Exiting with error..."); 32| 1| return Err(1); - 33| | } // The remaining lines below have no coverage because `if true` (with the constant literal - 34| | // `true`) is guaranteed to execute the `then` block, which is also guaranteed to `return`. - 35| | // Thankfully, in the normal case, conditions are not guaranteed ahead of time, and as shown - 36| | // in other tests, the lines below would have coverage (which would show they had `0` - 37| | // executions, assuming the condition still evaluated to `true`). - 38| | - 39| | let _ = Firework { strength: 1000 }; - 40| | - 41| | Ok(()) + 33| 0| } + 34| 0| + 35| 0| + 36| 0| + 37| 0| + 38| 0| + 39| 0| let _ = Firework { strength: 1000 }; + 40| 0| + 41| 0| Ok(()) 42| 1|} 43| | 44| |// Expected program output: diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loops_branches.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loops_branches.txt index 81d5c7d90346d..5d572db7cc60d 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loops_branches.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loops_branches.txt @@ -9,23 +9,23 @@ 9| 1| fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { 10| 1| if true { 11| 1| if false { - 12| | while true { - 13| | } + 12| 0| while true { + 13| 0| } 14| 1| } - 15| 1| write!(f, "error")?; - ^0 - 16| | } else { - 17| | } + 15| 1| write!(f, "cool")?; + ^0 + 16| 0| } else { + 17| 0| } 18| | 19| 10| for i in 0..10 { 20| 10| if true { 21| 10| if false { - 22| | while true {} + 22| 0| while true {} 23| 10| } - 24| 10| write!(f, "error")?; - ^0 - 25| | } else { - 26| | } + 24| 10| write!(f, "cool")?; + ^0 + 25| 0| } else { + 26| 0| } 27| | } 28| 1| Ok(()) 29| 1| } @@ -36,21 +36,21 @@ 34| |impl std::fmt::Display for DisplayTest { 35| 1| fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { 36| 1| if false { - 37| | } else { + 37| 0| } else { 38| 1| if false { - 39| | while true {} + 39| 0| while true {} 40| 1| } - 41| 1| write!(f, "error")?; - ^0 + 41| 1| write!(f, "cool")?; + ^0 42| | } 43| 10| for i in 0..10 { 44| 10| if false { - 45| | } else { + 45| 0| } else { 46| 10| if false { - 47| | while true {} + 47| 0| while true {} 48| 10| } - 49| 10| write!(f, "error")?; - ^0 + 49| 10| write!(f, "cool")?; + ^0 50| | } 51| | } 52| 1| Ok(()) diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.tight_inf_loop.txt b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.tight_inf_loop.txt index 5adeef7d0850b..2d4c57f451a2d 100644 --- a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.tight_inf_loop.txt +++ b/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.tight_inf_loop.txt @@ -1,6 +1,6 @@ 1| 1|fn main() { 2| 1| if false { - 3| | loop {} + 3| 0| loop {} 4| 1| } 5| 1|} diff --git a/src/test/run-make-fulldeps/coverage/conditions.rs b/src/test/run-make-fulldeps/coverage/conditions.rs index 8a2a0b53e5862..057599d1b471a 100644 --- a/src/test/run-make-fulldeps/coverage/conditions.rs +++ b/src/test/run-make-fulldeps/coverage/conditions.rs @@ -53,8 +53,8 @@ fn main() { } else { return; } - } // Note: closing brace shows uncovered (vs. `0` for implicit else) because condition literal - // `true` was const-evaluated. The compiler knows the `if` block will be executed. + } + let mut countdown = 0; if true { diff --git a/src/test/run-make-fulldeps/coverage/generics.rs b/src/test/run-make-fulldeps/coverage/generics.rs index cbeda35d3b8cf..18b38868496d4 100644 --- a/src/test/run-make-fulldeps/coverage/generics.rs +++ b/src/test/run-make-fulldeps/coverage/generics.rs @@ -30,11 +30,11 @@ fn main() -> Result<(),u8> { if true { println!("Exiting with error..."); return Err(1); - } // The remaining lines below have no coverage because `if true` (with the constant literal - // `true`) is guaranteed to execute the `then` block, which is also guaranteed to `return`. - // Thankfully, in the normal case, conditions are not guaranteed ahead of time, and as shown - // in other tests, the lines below would have coverage (which would show they had `0` - // executions, assuming the condition still evaluated to `true`). + } + + + + let _ = Firework { strength: 1000 }; diff --git a/src/test/run-make-fulldeps/coverage/loops_branches.rs b/src/test/run-make-fulldeps/coverage/loops_branches.rs index 4d9bbad3367f6..7116ce47f4b9d 100644 --- a/src/test/run-make-fulldeps/coverage/loops_branches.rs +++ b/src/test/run-make-fulldeps/coverage/loops_branches.rs @@ -12,7 +12,7 @@ impl std::fmt::Debug for DebugTest { while true { } } - write!(f, "error")?; + write!(f, "cool")?; } else { } @@ -21,7 +21,7 @@ impl std::fmt::Debug for DebugTest { if false { while true {} } - write!(f, "error")?; + write!(f, "cool")?; } else { } } @@ -38,7 +38,7 @@ impl std::fmt::Display for DisplayTest { if false { while true {} } - write!(f, "error")?; + write!(f, "cool")?; } for i in 0..10 { if false { @@ -46,7 +46,7 @@ impl std::fmt::Display for DisplayTest { if false { while true {} } - write!(f, "error")?; + write!(f, "cool")?; } } Ok(()) From 3fca198e468e5c311eb97b70d6ce3af1dddc56e8 Mon Sep 17 00:00:00 2001 From: Rich Kadel Date: Sat, 1 May 2021 15:34:27 -0700 Subject: [PATCH 04/18] Move coverage tests from run-make-fulldeps to run-make Fixes: #83830 --- src/bootstrap/test.rs | 2 +- src/test/run-make-fulldeps/coverage/compiletest-ignore-dir | 3 --- src/test/run-make-fulldeps/coverage/coverage_tools.mk | 6 ------ .../coverage-llvmir/Makefile | 0 .../coverage-llvmir/filecheck.testprog.txt | 0 .../coverage-llvmir/testprog.rs | 0 .../coverage-reports/Makefile | 0 .../coverage-reports/expected_show_coverage.abort.txt | 0 .../coverage-reports/expected_show_coverage.assert.txt | 0 .../coverage-reports/expected_show_coverage.async.txt | 0 .../coverage-reports/expected_show_coverage.async2.txt | 0 .../coverage-reports/expected_show_coverage.closure.txt | 0 .../expected_show_coverage.closure_macro.txt | 0 .../expected_show_coverage.closure_macro_async.txt | 0 .../coverage-reports/expected_show_coverage.conditions.txt | 0 .../coverage-reports/expected_show_coverage.continue.txt | 0 .../coverage-reports/expected_show_coverage.dead_code.txt | 0 .../coverage-reports/expected_show_coverage.doctest.txt | 0 .../coverage-reports/expected_show_coverage.drop_trait.txt | 0 .../coverage-reports/expected_show_coverage.generics.txt | 0 .../coverage-reports/expected_show_coverage.if.txt | 0 .../coverage-reports/expected_show_coverage.if_else.txt | 0 .../coverage-reports/expected_show_coverage.inline.txt | 0 .../coverage-reports/expected_show_coverage.inner_items.txt | 0 .../coverage-reports/expected_show_coverage.issue-83601.txt | 0 .../coverage-reports/expected_show_coverage.issue-84561.txt | 0 .../expected_show_coverage.lazy_boolean.txt | 0 .../expected_show_coverage.loop_break_value.txt | 0 .../expected_show_coverage.loops_branches.txt | 0 .../expected_show_coverage.match_or_pattern.txt | 0 .../expected_show_coverage.nested_loops.txt | 0 .../expected_show_coverage.no_cov_crate.txt | 0 .../coverage-reports/expected_show_coverage.no_cov_func.txt | 0 .../coverage-reports/expected_show_coverage.overflow.txt | 0 .../expected_show_coverage.panic_unwind.txt | 0 .../coverage-reports/expected_show_coverage.partial_eq.txt | 0 .../coverage-reports/expected_show_coverage.simple_loop.txt | 0 .../expected_show_coverage.simple_match.txt | 0 .../expected_show_coverage.tight_inf_loop.txt | 0 .../expected_show_coverage.try_error_result.txt | 0 .../coverage-reports/expected_show_coverage.unused.txt | 0 .../coverage-reports/expected_show_coverage.uses_crate.txt | 0 .../expected_show_coverage.uses_inline_crate.txt | 0 .../coverage-reports/expected_show_coverage.while.txt | 0 .../expected_show_coverage.while_early_ret.txt | 0 .../coverage-reports/expected_show_coverage.yield.txt | 0 .../coverage-reports/normalize_paths.py | 0 .../coverage/WARNING_KEEP_NAMES_SHORT.txt | 0 src/test/{run-make-fulldeps => run-make}/coverage/abort.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/assert.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/async.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/async2.rs | 0 .../{run-make-fulldeps => run-make}/coverage/closure.rs | 0 .../coverage/closure_macro.rs | 0 .../coverage/closure_macro_async.rs | 0 src/test/run-make/coverage/compiletest-ignore-dir | 3 +++ .../{run-make-fulldeps => run-make}/coverage/conditions.rs | 0 .../{run-make-fulldeps => run-make}/coverage/continue.rs | 0 src/test/run-make/coverage/coverage_tools.mk | 6 ++++++ .../{run-make-fulldeps => run-make}/coverage/dead_code.rs | 0 .../{run-make-fulldeps => run-make}/coverage/doctest.rs | 0 .../{run-make-fulldeps => run-make}/coverage/drop_trait.rs | 0 .../{run-make-fulldeps => run-make}/coverage/generics.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/if.rs | 0 .../{run-make-fulldeps => run-make}/coverage/if_else.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/inline.rs | 0 .../{run-make-fulldeps => run-make}/coverage/inner_items.rs | 0 .../{run-make-fulldeps => run-make}/coverage/issue-83601.rs | 0 .../{run-make-fulldeps => run-make}/coverage/issue-84561.rs | 0 .../coverage/lazy_boolean.rs | 0 .../coverage/lib/doctest_crate.rs | 0 .../coverage/lib/used_crate.rs | 0 .../coverage/lib/used_inline_crate.rs | 0 .../coverage/loop_break_value.rs | 0 .../coverage/loops_branches.rs | 0 .../coverage/match_or_pattern.rs | 0 .../coverage/nested_loops.rs | 0 .../coverage/no_cov_crate.rs | 0 .../{run-make-fulldeps => run-make}/coverage/no_cov_func.rs | 0 .../{run-make-fulldeps => run-make}/coverage/overflow.rs | 0 .../coverage/panic_unwind.rs | 0 .../{run-make-fulldeps => run-make}/coverage/partial_eq.rs | 0 .../{run-make-fulldeps => run-make}/coverage/simple_loop.rs | 0 .../coverage/simple_match.rs | 0 .../coverage/tight_inf_loop.rs | 0 .../coverage/try_error_result.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/unused.rs | 0 .../{run-make-fulldeps => run-make}/coverage/uses_crate.rs | 0 .../coverage/uses_inline_crate.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/while.rs | 0 .../coverage/while_early_ret.rs | 0 src/test/{run-make-fulldeps => run-make}/coverage/yield.rs | 0 92 files changed, 10 insertions(+), 10 deletions(-) delete mode 100644 src/test/run-make-fulldeps/coverage/compiletest-ignore-dir delete mode 100644 src/test/run-make-fulldeps/coverage/coverage_tools.mk rename src/test/{run-make-fulldeps => run-make}/coverage-llvmir/Makefile (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-llvmir/filecheck.testprog.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-llvmir/testprog.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/Makefile (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.abort.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.assert.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.async.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.async2.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.closure.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.closure_macro.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.closure_macro_async.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.conditions.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.continue.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.dead_code.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.doctest.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.drop_trait.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.generics.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.if.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.if_else.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.inline.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.inner_items.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.issue-83601.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.issue-84561.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.lazy_boolean.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.loop_break_value.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.loops_branches.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.match_or_pattern.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.nested_loops.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.no_cov_crate.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.no_cov_func.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.overflow.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.panic_unwind.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.partial_eq.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.simple_loop.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.simple_match.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.tight_inf_loop.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.try_error_result.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.unused.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.uses_crate.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.uses_inline_crate.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.while.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.while_early_ret.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/expected_show_coverage.yield.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage-reports/normalize_paths.py (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/WARNING_KEEP_NAMES_SHORT.txt (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/abort.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/assert.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/async.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/async2.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/closure.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/closure_macro.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/closure_macro_async.rs (100%) create mode 100644 src/test/run-make/coverage/compiletest-ignore-dir rename src/test/{run-make-fulldeps => run-make}/coverage/conditions.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/continue.rs (100%) create mode 100644 src/test/run-make/coverage/coverage_tools.mk rename src/test/{run-make-fulldeps => run-make}/coverage/dead_code.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/doctest.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/drop_trait.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/generics.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/if.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/if_else.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/inline.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/inner_items.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/issue-83601.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/issue-84561.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/lazy_boolean.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/lib/doctest_crate.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/lib/used_crate.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/lib/used_inline_crate.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/loop_break_value.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/loops_branches.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/match_or_pattern.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/nested_loops.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/no_cov_crate.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/no_cov_func.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/overflow.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/panic_unwind.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/partial_eq.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/simple_loop.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/simple_match.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/tight_inf_loop.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/try_error_result.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/unused.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/uses_crate.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/uses_inline_crate.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/while.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/while_early_ret.rs (100%) rename src/test/{run-make-fulldeps => run-make}/coverage/yield.rs (100%) diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs index 965d11621450b..2c02dd6802621 100644 --- a/src/bootstrap/test.rs +++ b/src/bootstrap/test.rs @@ -1197,7 +1197,7 @@ note: if you're sure you want to do this, please open an issue as to why. In the .arg(builder.ensure(tool::JsonDocCk { compiler: json_compiler, target })); } - if mode == "run-make" && suite.ends_with("fulldeps") { + if mode == "run-make" && !suite.ends_with("fulldeps") { let rust_demangler = builder .ensure(tool::RustDemangler { compiler, target, extra_features: Vec::new() }) .expect("in-tree tool"); diff --git a/src/test/run-make-fulldeps/coverage/compiletest-ignore-dir b/src/test/run-make-fulldeps/coverage/compiletest-ignore-dir deleted file mode 100644 index d1824d189e382..0000000000000 --- a/src/test/run-make-fulldeps/coverage/compiletest-ignore-dir +++ /dev/null @@ -1,3 +0,0 @@ -# Directory "coverage" supports the tests at prefix ../coverage-* - -# Use ./x.py [options] test src/test/run-make-fulldeps/coverage to run all related tests. diff --git a/src/test/run-make-fulldeps/coverage/coverage_tools.mk b/src/test/run-make-fulldeps/coverage/coverage_tools.mk deleted file mode 100644 index aa1dc7b91ce94..0000000000000 --- a/src/test/run-make-fulldeps/coverage/coverage_tools.mk +++ /dev/null @@ -1,6 +0,0 @@ -# Common Makefile include for Rust `run-make-fulldeps/coverage-* tests. Include this -# file with the line: -# -# -include ../coverage/coverage_tools.mk - --include ../tools.mk diff --git a/src/test/run-make-fulldeps/coverage-llvmir/Makefile b/src/test/run-make/coverage-llvmir/Makefile similarity index 100% rename from src/test/run-make-fulldeps/coverage-llvmir/Makefile rename to src/test/run-make/coverage-llvmir/Makefile diff --git a/src/test/run-make-fulldeps/coverage-llvmir/filecheck.testprog.txt b/src/test/run-make/coverage-llvmir/filecheck.testprog.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-llvmir/filecheck.testprog.txt rename to src/test/run-make/coverage-llvmir/filecheck.testprog.txt diff --git a/src/test/run-make-fulldeps/coverage-llvmir/testprog.rs b/src/test/run-make/coverage-llvmir/testprog.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage-llvmir/testprog.rs rename to src/test/run-make/coverage-llvmir/testprog.rs diff --git a/src/test/run-make-fulldeps/coverage-reports/Makefile b/src/test/run-make/coverage-reports/Makefile similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/Makefile rename to src/test/run-make/coverage-reports/Makefile diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.abort.txt b/src/test/run-make/coverage-reports/expected_show_coverage.abort.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.abort.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.abort.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.assert.txt b/src/test/run-make/coverage-reports/expected_show_coverage.assert.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.assert.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.assert.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async.txt b/src/test/run-make/coverage-reports/expected_show_coverage.async.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.async.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async2.txt b/src/test/run-make/coverage-reports/expected_show_coverage.async2.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.async2.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.async2.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.closure.txt b/src/test/run-make/coverage-reports/expected_show_coverage.closure.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.closure.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.closure.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.closure_macro.txt b/src/test/run-make/coverage-reports/expected_show_coverage.closure_macro.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.closure_macro.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.closure_macro.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.closure_macro_async.txt b/src/test/run-make/coverage-reports/expected_show_coverage.closure_macro_async.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.closure_macro_async.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.closure_macro_async.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.conditions.txt b/src/test/run-make/coverage-reports/expected_show_coverage.conditions.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.conditions.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.conditions.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.continue.txt b/src/test/run-make/coverage-reports/expected_show_coverage.continue.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.continue.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.continue.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.dead_code.txt b/src/test/run-make/coverage-reports/expected_show_coverage.dead_code.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.dead_code.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.dead_code.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.doctest.txt b/src/test/run-make/coverage-reports/expected_show_coverage.doctest.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.doctest.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.doctest.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.drop_trait.txt b/src/test/run-make/coverage-reports/expected_show_coverage.drop_trait.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.drop_trait.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.drop_trait.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.generics.txt b/src/test/run-make/coverage-reports/expected_show_coverage.generics.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.generics.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.generics.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.if.txt b/src/test/run-make/coverage-reports/expected_show_coverage.if.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.if.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.if.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.if_else.txt b/src/test/run-make/coverage-reports/expected_show_coverage.if_else.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.if_else.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.if_else.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.inline.txt b/src/test/run-make/coverage-reports/expected_show_coverage.inline.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.inline.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.inline.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.inner_items.txt b/src/test/run-make/coverage-reports/expected_show_coverage.inner_items.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.inner_items.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.inner_items.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.issue-83601.txt b/src/test/run-make/coverage-reports/expected_show_coverage.issue-83601.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.issue-83601.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.issue-83601.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.issue-84561.txt b/src/test/run-make/coverage-reports/expected_show_coverage.issue-84561.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.issue-84561.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.issue-84561.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.lazy_boolean.txt b/src/test/run-make/coverage-reports/expected_show_coverage.lazy_boolean.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.lazy_boolean.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.lazy_boolean.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loop_break_value.txt b/src/test/run-make/coverage-reports/expected_show_coverage.loop_break_value.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loop_break_value.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.loop_break_value.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loops_branches.txt b/src/test/run-make/coverage-reports/expected_show_coverage.loops_branches.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.loops_branches.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.loops_branches.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.match_or_pattern.txt b/src/test/run-make/coverage-reports/expected_show_coverage.match_or_pattern.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.match_or_pattern.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.match_or_pattern.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.nested_loops.txt b/src/test/run-make/coverage-reports/expected_show_coverage.nested_loops.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.nested_loops.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.nested_loops.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.no_cov_crate.txt b/src/test/run-make/coverage-reports/expected_show_coverage.no_cov_crate.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.no_cov_crate.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.no_cov_crate.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.no_cov_func.txt b/src/test/run-make/coverage-reports/expected_show_coverage.no_cov_func.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.no_cov_func.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.no_cov_func.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.overflow.txt b/src/test/run-make/coverage-reports/expected_show_coverage.overflow.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.overflow.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.overflow.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.panic_unwind.txt b/src/test/run-make/coverage-reports/expected_show_coverage.panic_unwind.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.panic_unwind.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.panic_unwind.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.partial_eq.txt b/src/test/run-make/coverage-reports/expected_show_coverage.partial_eq.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.partial_eq.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.partial_eq.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.simple_loop.txt b/src/test/run-make/coverage-reports/expected_show_coverage.simple_loop.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.simple_loop.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.simple_loop.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.simple_match.txt b/src/test/run-make/coverage-reports/expected_show_coverage.simple_match.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.simple_match.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.simple_match.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.tight_inf_loop.txt b/src/test/run-make/coverage-reports/expected_show_coverage.tight_inf_loop.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.tight_inf_loop.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.tight_inf_loop.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.try_error_result.txt b/src/test/run-make/coverage-reports/expected_show_coverage.try_error_result.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.try_error_result.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.try_error_result.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.unused.txt b/src/test/run-make/coverage-reports/expected_show_coverage.unused.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.unused.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.unused.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.uses_crate.txt b/src/test/run-make/coverage-reports/expected_show_coverage.uses_crate.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.uses_crate.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.uses_crate.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.uses_inline_crate.txt b/src/test/run-make/coverage-reports/expected_show_coverage.uses_inline_crate.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.uses_inline_crate.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.uses_inline_crate.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.while.txt b/src/test/run-make/coverage-reports/expected_show_coverage.while.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.while.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.while.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.while_early_ret.txt b/src/test/run-make/coverage-reports/expected_show_coverage.while_early_ret.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.while_early_ret.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.while_early_ret.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.yield.txt b/src/test/run-make/coverage-reports/expected_show_coverage.yield.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/expected_show_coverage.yield.txt rename to src/test/run-make/coverage-reports/expected_show_coverage.yield.txt diff --git a/src/test/run-make-fulldeps/coverage-reports/normalize_paths.py b/src/test/run-make/coverage-reports/normalize_paths.py similarity index 100% rename from src/test/run-make-fulldeps/coverage-reports/normalize_paths.py rename to src/test/run-make/coverage-reports/normalize_paths.py diff --git a/src/test/run-make-fulldeps/coverage/WARNING_KEEP_NAMES_SHORT.txt b/src/test/run-make/coverage/WARNING_KEEP_NAMES_SHORT.txt similarity index 100% rename from src/test/run-make-fulldeps/coverage/WARNING_KEEP_NAMES_SHORT.txt rename to src/test/run-make/coverage/WARNING_KEEP_NAMES_SHORT.txt diff --git a/src/test/run-make-fulldeps/coverage/abort.rs b/src/test/run-make/coverage/abort.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/abort.rs rename to src/test/run-make/coverage/abort.rs diff --git a/src/test/run-make-fulldeps/coverage/assert.rs b/src/test/run-make/coverage/assert.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/assert.rs rename to src/test/run-make/coverage/assert.rs diff --git a/src/test/run-make-fulldeps/coverage/async.rs b/src/test/run-make/coverage/async.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/async.rs rename to src/test/run-make/coverage/async.rs diff --git a/src/test/run-make-fulldeps/coverage/async2.rs b/src/test/run-make/coverage/async2.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/async2.rs rename to src/test/run-make/coverage/async2.rs diff --git a/src/test/run-make-fulldeps/coverage/closure.rs b/src/test/run-make/coverage/closure.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/closure.rs rename to src/test/run-make/coverage/closure.rs diff --git a/src/test/run-make-fulldeps/coverage/closure_macro.rs b/src/test/run-make/coverage/closure_macro.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/closure_macro.rs rename to src/test/run-make/coverage/closure_macro.rs diff --git a/src/test/run-make-fulldeps/coverage/closure_macro_async.rs b/src/test/run-make/coverage/closure_macro_async.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/closure_macro_async.rs rename to src/test/run-make/coverage/closure_macro_async.rs diff --git a/src/test/run-make/coverage/compiletest-ignore-dir b/src/test/run-make/coverage/compiletest-ignore-dir new file mode 100644 index 0000000000000..b533b272d38cf --- /dev/null +++ b/src/test/run-make/coverage/compiletest-ignore-dir @@ -0,0 +1,3 @@ +# Directory "coverage" supports the tests at prefix ../coverage-* + +# Use ./x.py [options] test src/test/run-make/coverage to run all related tests. diff --git a/src/test/run-make-fulldeps/coverage/conditions.rs b/src/test/run-make/coverage/conditions.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/conditions.rs rename to src/test/run-make/coverage/conditions.rs diff --git a/src/test/run-make-fulldeps/coverage/continue.rs b/src/test/run-make/coverage/continue.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/continue.rs rename to src/test/run-make/coverage/continue.rs diff --git a/src/test/run-make/coverage/coverage_tools.mk b/src/test/run-make/coverage/coverage_tools.mk new file mode 100644 index 0000000000000..8fce5f1b958fc --- /dev/null +++ b/src/test/run-make/coverage/coverage_tools.mk @@ -0,0 +1,6 @@ +# Common Makefile include for Rust `run-make/coverage-* tests. Include this +# file with the line: +# +# -include ../coverage/coverage_tools.mk + +-include ../../run-make-fulldeps/tools.mk diff --git a/src/test/run-make-fulldeps/coverage/dead_code.rs b/src/test/run-make/coverage/dead_code.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/dead_code.rs rename to src/test/run-make/coverage/dead_code.rs diff --git a/src/test/run-make-fulldeps/coverage/doctest.rs b/src/test/run-make/coverage/doctest.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/doctest.rs rename to src/test/run-make/coverage/doctest.rs diff --git a/src/test/run-make-fulldeps/coverage/drop_trait.rs b/src/test/run-make/coverage/drop_trait.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/drop_trait.rs rename to src/test/run-make/coverage/drop_trait.rs diff --git a/src/test/run-make-fulldeps/coverage/generics.rs b/src/test/run-make/coverage/generics.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/generics.rs rename to src/test/run-make/coverage/generics.rs diff --git a/src/test/run-make-fulldeps/coverage/if.rs b/src/test/run-make/coverage/if.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/if.rs rename to src/test/run-make/coverage/if.rs diff --git a/src/test/run-make-fulldeps/coverage/if_else.rs b/src/test/run-make/coverage/if_else.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/if_else.rs rename to src/test/run-make/coverage/if_else.rs diff --git a/src/test/run-make-fulldeps/coverage/inline.rs b/src/test/run-make/coverage/inline.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/inline.rs rename to src/test/run-make/coverage/inline.rs diff --git a/src/test/run-make-fulldeps/coverage/inner_items.rs b/src/test/run-make/coverage/inner_items.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/inner_items.rs rename to src/test/run-make/coverage/inner_items.rs diff --git a/src/test/run-make-fulldeps/coverage/issue-83601.rs b/src/test/run-make/coverage/issue-83601.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/issue-83601.rs rename to src/test/run-make/coverage/issue-83601.rs diff --git a/src/test/run-make-fulldeps/coverage/issue-84561.rs b/src/test/run-make/coverage/issue-84561.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/issue-84561.rs rename to src/test/run-make/coverage/issue-84561.rs diff --git a/src/test/run-make-fulldeps/coverage/lazy_boolean.rs b/src/test/run-make/coverage/lazy_boolean.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/lazy_boolean.rs rename to src/test/run-make/coverage/lazy_boolean.rs diff --git a/src/test/run-make-fulldeps/coverage/lib/doctest_crate.rs b/src/test/run-make/coverage/lib/doctest_crate.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/lib/doctest_crate.rs rename to src/test/run-make/coverage/lib/doctest_crate.rs diff --git a/src/test/run-make-fulldeps/coverage/lib/used_crate.rs b/src/test/run-make/coverage/lib/used_crate.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/lib/used_crate.rs rename to src/test/run-make/coverage/lib/used_crate.rs diff --git a/src/test/run-make-fulldeps/coverage/lib/used_inline_crate.rs b/src/test/run-make/coverage/lib/used_inline_crate.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/lib/used_inline_crate.rs rename to src/test/run-make/coverage/lib/used_inline_crate.rs diff --git a/src/test/run-make-fulldeps/coverage/loop_break_value.rs b/src/test/run-make/coverage/loop_break_value.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/loop_break_value.rs rename to src/test/run-make/coverage/loop_break_value.rs diff --git a/src/test/run-make-fulldeps/coverage/loops_branches.rs b/src/test/run-make/coverage/loops_branches.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/loops_branches.rs rename to src/test/run-make/coverage/loops_branches.rs diff --git a/src/test/run-make-fulldeps/coverage/match_or_pattern.rs b/src/test/run-make/coverage/match_or_pattern.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/match_or_pattern.rs rename to src/test/run-make/coverage/match_or_pattern.rs diff --git a/src/test/run-make-fulldeps/coverage/nested_loops.rs b/src/test/run-make/coverage/nested_loops.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/nested_loops.rs rename to src/test/run-make/coverage/nested_loops.rs diff --git a/src/test/run-make-fulldeps/coverage/no_cov_crate.rs b/src/test/run-make/coverage/no_cov_crate.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/no_cov_crate.rs rename to src/test/run-make/coverage/no_cov_crate.rs diff --git a/src/test/run-make-fulldeps/coverage/no_cov_func.rs b/src/test/run-make/coverage/no_cov_func.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/no_cov_func.rs rename to src/test/run-make/coverage/no_cov_func.rs diff --git a/src/test/run-make-fulldeps/coverage/overflow.rs b/src/test/run-make/coverage/overflow.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/overflow.rs rename to src/test/run-make/coverage/overflow.rs diff --git a/src/test/run-make-fulldeps/coverage/panic_unwind.rs b/src/test/run-make/coverage/panic_unwind.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/panic_unwind.rs rename to src/test/run-make/coverage/panic_unwind.rs diff --git a/src/test/run-make-fulldeps/coverage/partial_eq.rs b/src/test/run-make/coverage/partial_eq.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/partial_eq.rs rename to src/test/run-make/coverage/partial_eq.rs diff --git a/src/test/run-make-fulldeps/coverage/simple_loop.rs b/src/test/run-make/coverage/simple_loop.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/simple_loop.rs rename to src/test/run-make/coverage/simple_loop.rs diff --git a/src/test/run-make-fulldeps/coverage/simple_match.rs b/src/test/run-make/coverage/simple_match.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/simple_match.rs rename to src/test/run-make/coverage/simple_match.rs diff --git a/src/test/run-make-fulldeps/coverage/tight_inf_loop.rs b/src/test/run-make/coverage/tight_inf_loop.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/tight_inf_loop.rs rename to src/test/run-make/coverage/tight_inf_loop.rs diff --git a/src/test/run-make-fulldeps/coverage/try_error_result.rs b/src/test/run-make/coverage/try_error_result.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/try_error_result.rs rename to src/test/run-make/coverage/try_error_result.rs diff --git a/src/test/run-make-fulldeps/coverage/unused.rs b/src/test/run-make/coverage/unused.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/unused.rs rename to src/test/run-make/coverage/unused.rs diff --git a/src/test/run-make-fulldeps/coverage/uses_crate.rs b/src/test/run-make/coverage/uses_crate.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/uses_crate.rs rename to src/test/run-make/coverage/uses_crate.rs diff --git a/src/test/run-make-fulldeps/coverage/uses_inline_crate.rs b/src/test/run-make/coverage/uses_inline_crate.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/uses_inline_crate.rs rename to src/test/run-make/coverage/uses_inline_crate.rs diff --git a/src/test/run-make-fulldeps/coverage/while.rs b/src/test/run-make/coverage/while.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/while.rs rename to src/test/run-make/coverage/while.rs diff --git a/src/test/run-make-fulldeps/coverage/while_early_ret.rs b/src/test/run-make/coverage/while_early_ret.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/while_early_ret.rs rename to src/test/run-make/coverage/while_early_ret.rs diff --git a/src/test/run-make-fulldeps/coverage/yield.rs b/src/test/run-make/coverage/yield.rs similarity index 100% rename from src/test/run-make-fulldeps/coverage/yield.rs rename to src/test/run-make/coverage/yield.rs From dd43d133252750154e323af3bc87d523bb1987ae Mon Sep 17 00:00:00 2001 From: Joshua Nelson Date: Thu, 22 Apr 2021 11:45:08 -0400 Subject: [PATCH 05/18] Reduce duplication in `impl_dep_tracking_hash` macros --- compiler/rustc_session/src/config.rs | 118 ++++++++++++++------------- 1 file changed, 61 insertions(+), 57 deletions(-) diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs index 1f5cb5b8abc8c..a859da3721c51 100644 --- a/compiler/rustc_session/src/config.rs +++ b/compiler/rustc_session/src/config.rs @@ -2332,17 +2332,17 @@ crate mod dep_tracking { } macro_rules! impl_dep_tracking_hash_via_hash { - ($t:ty) => { + ($($t:ty),+ $(,)?) => {$( impl DepTrackingHash for $t { fn hash(&self, hasher: &mut DefaultHasher, _: ErrorOutputType) { Hash::hash(self, hasher); } } - }; + )+}; } macro_rules! impl_dep_tracking_hash_for_sortable_vec_of { - ($t:ty) => { + ($($t:ty),+ $(,)?) => {$( impl DepTrackingHash for Vec<$t> { fn hash(&self, hasher: &mut DefaultHasher, error_format: ErrorOutputType) { let mut elems: Vec<&$t> = self.iter().collect(); @@ -2354,61 +2354,65 @@ crate mod dep_tracking { } } } - }; - } + )+}; + } + + impl_dep_tracking_hash_via_hash!( + bool, + usize, + u64, + String, + PathBuf, + lint::Level, + Option, + Option, + Option, + Option, + Option, + Option<(String, u64)>, + Option>, + Option, + Option, + Option, + Option, + Option, + Option, + Option, + Option, + Option, + Option, + CrateType, + MergeFunctions, + PanicStrategy, + RelroLevel, + Passes, + OptLevel, + LtoCli, + DebugInfo, + UnstableFeatures, + OutputTypes, + NativeLibKind, + SanitizerSet, + CFGuard, + TargetTriple, + Edition, + LinkerPluginLto, + Option, + SwitchWithOptPath, + Option, + Option, + TrimmedDefPaths, + ); - impl_dep_tracking_hash_via_hash!(bool); - impl_dep_tracking_hash_via_hash!(usize); - impl_dep_tracking_hash_via_hash!(u64); - impl_dep_tracking_hash_via_hash!(String); - impl_dep_tracking_hash_via_hash!(PathBuf); - impl_dep_tracking_hash_via_hash!(lint::Level); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option<(String, u64)>); - impl_dep_tracking_hash_via_hash!(Option>); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(CrateType); - impl_dep_tracking_hash_via_hash!(MergeFunctions); - impl_dep_tracking_hash_via_hash!(PanicStrategy); - impl_dep_tracking_hash_via_hash!(RelroLevel); - impl_dep_tracking_hash_via_hash!(Passes); - impl_dep_tracking_hash_via_hash!(OptLevel); - impl_dep_tracking_hash_via_hash!(LtoCli); - impl_dep_tracking_hash_via_hash!(DebugInfo); - impl_dep_tracking_hash_via_hash!(UnstableFeatures); - impl_dep_tracking_hash_via_hash!(OutputTypes); - impl_dep_tracking_hash_via_hash!(NativeLibKind); - impl_dep_tracking_hash_via_hash!(SanitizerSet); - impl_dep_tracking_hash_via_hash!(CFGuard); - impl_dep_tracking_hash_via_hash!(TargetTriple); - impl_dep_tracking_hash_via_hash!(Edition); - impl_dep_tracking_hash_via_hash!(LinkerPluginLto); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(SwitchWithOptPath); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(Option); - impl_dep_tracking_hash_via_hash!(TrimmedDefPaths); - - impl_dep_tracking_hash_for_sortable_vec_of!(String); - impl_dep_tracking_hash_for_sortable_vec_of!(PathBuf); - impl_dep_tracking_hash_for_sortable_vec_of!((PathBuf, PathBuf)); - impl_dep_tracking_hash_for_sortable_vec_of!(CrateType); - impl_dep_tracking_hash_for_sortable_vec_of!((String, lint::Level)); - impl_dep_tracking_hash_for_sortable_vec_of!((String, Option, NativeLibKind)); - impl_dep_tracking_hash_for_sortable_vec_of!((String, u64)); + impl_dep_tracking_hash_for_sortable_vec_of!( + String, + PathBuf, + (PathBuf, PathBuf), + CrateType, + (String, lint::Level), + (String, Option, NativeLibKind), + (String, u64) + ); impl DepTrackingHash for (T1, T2) where From 1e89b583c3bcf1757f57250a089450165e886049 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Esteban=20K=C3=BCber?= Date: Sat, 1 May 2021 17:18:04 -0700 Subject: [PATCH 06/18] Account for unsatisfied bounds in E0599 Fix #84769, follow up to #84499, #83667. --- .../rustc_typeck/src/check/method/suggest.rs | 6 +++++- .../import-trait-for-method-call.rs | 9 ++++++++- .../import-trait-for-method-call.stderr | 18 +++++++++++++++++- 3 files changed, 30 insertions(+), 3 deletions(-) diff --git a/compiler/rustc_typeck/src/check/method/suggest.rs b/compiler/rustc_typeck/src/check/method/suggest.rs index 73e35f0171aa7..b2e4e7a981d20 100644 --- a/compiler/rustc_typeck/src/check/method/suggest.rs +++ b/compiler/rustc_typeck/src/check/method/suggest.rs @@ -579,6 +579,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { } let mut restrict_type_params = false; + let mut unsatisfied_bounds = false; if !unsatisfied_predicates.is_empty() { let def_span = |def_id| { self.tcx.sess.source_map().guess_head_span(self.tcx.def_span(def_id)) @@ -739,6 +740,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { err.note(&format!( "the following trait bounds were not satisfied:\n{bound_list}" )); + unsatisfied_bounds = true; } } @@ -752,6 +754,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { source, out_of_scope_traits, &unsatisfied_predicates, + unsatisfied_bounds, ); } @@ -984,9 +987,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { source: SelfSource<'tcx>, valid_out_of_scope_traits: Vec, unsatisfied_predicates: &[(ty::Predicate<'tcx>, Option>)], + unsatisfied_bounds: bool, ) { let mut alt_rcvr_sugg = false; - if let SelfSource::MethodCall(rcvr) = source { + if let (SelfSource::MethodCall(rcvr), false) = (source, unsatisfied_bounds) { debug!(?span, ?item_name, ?rcvr_ty, ?rcvr); let skippable = [ self.tcx.lang_items().clone_trait(), diff --git a/src/test/ui/suggestions/import-trait-for-method-call.rs b/src/test/ui/suggestions/import-trait-for-method-call.rs index 646f68dea14e8..4dbadbdf98206 100644 --- a/src/test/ui/suggestions/import-trait-for-method-call.rs +++ b/src/test/ui/suggestions/import-trait-for-method-call.rs @@ -6,4 +6,11 @@ fn next_u64() -> u64 { h.finish() //~ ERROR no method named `finish` found for struct `DefaultHasher` } -fn main() {} +trait Bar {} +impl Bar for String {} + +fn main() { + let s = String::from("hey"); + let x: &dyn Bar = &s; + x.as_ref(); //~ ERROR the method `as_ref` exists for reference `&dyn Bar`, but its trait bounds +} diff --git a/src/test/ui/suggestions/import-trait-for-method-call.stderr b/src/test/ui/suggestions/import-trait-for-method-call.stderr index f3ae20552f3d5..a2b9b9d14ab09 100644 --- a/src/test/ui/suggestions/import-trait-for-method-call.stderr +++ b/src/test/ui/suggestions/import-trait-for-method-call.stderr @@ -15,6 +15,22 @@ help: the following trait is implemented but not in scope; perhaps add a `use` f LL | use std::hash::Hasher; | -error: aborting due to previous error +error[E0599]: the method `as_ref` exists for reference `&dyn Bar`, but its trait bounds were not satisfied + --> $DIR/import-trait-for-method-call.rs:15:7 + | +LL | trait Bar {} + | --------- doesn't satisfy `dyn Bar: AsRef<_>` +... +LL | x.as_ref(); + | ^^^^^^ method cannot be called on `&dyn Bar` due to unsatisfied trait bounds + | + = note: the following trait bounds were not satisfied: + `dyn Bar: AsRef<_>` + which is required by `&dyn Bar: AsRef<_>` + = help: items from traits can only be used if the trait is implemented and in scope + = note: the following trait defines an item `as_ref`, perhaps you need to implement it: + candidate #1: `AsRef` + +error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0599`. From 367c1dbd4819fb2148ab35b934b3215abe3af441 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Lauren=C8=9Biu=20Nicola?= Date: Mon, 3 May 2021 10:16:06 +0300 Subject: [PATCH 07/18] :arrow_up: rust-analyzer --- src/tools/rust-analyzer | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/tools/rust-analyzer b/src/tools/rust-analyzer index 617535393bb5c..eb741e895f1a7 160000 --- a/src/tools/rust-analyzer +++ b/src/tools/rust-analyzer @@ -1 +1 @@ -Subproject commit 617535393bb5ccc7adf0bac8a3b9a9c306454e79 +Subproject commit eb741e895f1a73420a401f2495c711afe37d9d19 From 2e559c8e1098545582d4a72f33e73538a5e373b5 Mon Sep 17 00:00:00 2001 From: wcampbell Date: Sun, 2 May 2021 20:06:17 -0400 Subject: [PATCH 08/18] use `else if` in std library Clippy: Decreases indentation and improves readability Signed-off-by: wcampbell --- library/core/src/time.rs | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/library/core/src/time.rs b/library/core/src/time.rs index bfea39e3211fc..489b722440362 100644 --- a/library/core/src/time.rs +++ b/library/core/src/time.rs @@ -518,13 +518,11 @@ impl Duration { if let Some(mut secs) = self.secs.checked_sub(rhs.secs) { let nanos = if self.nanos >= rhs.nanos { self.nanos - rhs.nanos + } else if let Some(sub_secs) = secs.checked_sub(1) { + secs = sub_secs; + self.nanos + NANOS_PER_SEC - rhs.nanos } else { - if let Some(sub_secs) = secs.checked_sub(1) { - secs = sub_secs; - self.nanos + NANOS_PER_SEC - rhs.nanos - } else { - return None; - } + return None; }; debug_assert!(nanos < NANOS_PER_SEC); Some(Duration { secs, nanos }) From 03c763e88a412510e48f8c8fd90fbfadf30218ed Mon Sep 17 00:00:00 2001 From: "Felix S. Klock II" Date: Mon, 3 May 2021 09:21:52 -0400 Subject: [PATCH 09/18] manually crafted revert of PR #80653, to address issue #82465. (update: placated tidy) --- src/librustdoc/html/render/context.rs | 9 +- src/librustdoc/html/render/mod.rs | 26 ++--- src/librustdoc/passes/collect_trait_impls.rs | 102 +++++++------------ src/test/rustdoc-ui/deref-recursive-cycle.rs | 17 ---- src/test/rustdoc/deref-recursive-pathbuf.rs | 24 ----- src/test/rustdoc/deref-recursive.rs | 40 -------- src/test/rustdoc/deref-typedef.rs | 4 +- 7 files changed, 46 insertions(+), 176 deletions(-) delete mode 100644 src/test/rustdoc-ui/deref-recursive-cycle.rs delete mode 100644 src/test/rustdoc/deref-recursive-pathbuf.rs delete mode 100644 src/test/rustdoc/deref-recursive.rs diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs index 4c8ba0e7b496e..7cb7e070f7041 100644 --- a/src/librustdoc/html/render/context.rs +++ b/src/librustdoc/html/render/context.rs @@ -6,7 +6,7 @@ use std::rc::Rc; use std::sync::mpsc::{channel, Receiver}; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; -use rustc_hir::def_id::{DefId, LOCAL_CRATE}; +use rustc_hir::def_id::LOCAL_CRATE; use rustc_middle::ty::TyCtxt; use rustc_session::Session; use rustc_span::edition::Edition; @@ -50,9 +50,6 @@ crate struct Context<'tcx> { pub(super) render_redirect_pages: bool, /// The map used to ensure all generated 'id=' attributes are unique. pub(super) id_map: RefCell, - /// Tracks section IDs for `Deref` targets so they match in both the main - /// body and the sidebar. - pub(super) deref_id_map: RefCell>, /// Shared mutable state. /// /// Issue for improving the situation: [#82381][] @@ -73,7 +70,7 @@ crate struct Context<'tcx> { // `Context` is cloned a lot, so we don't want the size to grow unexpectedly. #[cfg(target_arch = "x86_64")] -rustc_data_structures::static_assert_size!(Context<'_>, 152); +rustc_data_structures::static_assert_size!(Context<'_>, 112); /// Shared mutable state used in [`Context`] and elsewhere. crate struct SharedContext<'tcx> { @@ -470,7 +467,6 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> { dst, render_redirect_pages: false, id_map: RefCell::new(id_map), - deref_id_map: RefCell::new(FxHashMap::default()), shared: Rc::new(scx), cache: Rc::new(cache), }; @@ -488,7 +484,6 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> { dst: self.dst.clone(), render_redirect_pages: self.render_redirect_pages, id_map: RefCell::new(IdMap::new()), - deref_id_map: RefCell::new(FxHashMap::default()), shared: Rc::clone(&self.shared), cache: Rc::clone(&self.cache), } diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs index 7de72d8198725..15ce3740e05d4 100644 --- a/src/librustdoc/html/render/mod.rs +++ b/src/librustdoc/html/render/mod.rs @@ -1034,17 +1034,12 @@ fn render_assoc_items( RenderMode::Normal } AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => { - let id = - cx.derive_id(small_url_encode(format!("deref-methods-{:#}", type_.print(cx)))); - debug!("Adding {} to deref id map", type_.print(cx)); - cx.deref_id_map.borrow_mut().insert(type_.def_id_full(cache).unwrap(), id.clone()); write!( w, - "

\ + "

\ Methods from {trait_}<Target = {type_}>\ - \ + \

", - id = id, trait_ = trait_.print(cx), type_ = type_.print(cx), ); @@ -1069,6 +1064,9 @@ fn render_assoc_items( ); } } + if let AssocItemRender::DerefFor { .. } = what { + return; + } if !traits.is_empty() { let deref_impl = traits .iter() @@ -1079,13 +1077,6 @@ fn render_assoc_items( .any(|t| t.inner_impl().trait_.def_id_full(cache) == cx.cache.deref_mut_trait_did); render_deref_methods(w, cx, impl_, containing_item, has_deref_mut); } - - // If we were already one level into rendering deref methods, we don't want to render - // anything after recursing into any further deref methods above. - if let AssocItemRender::DerefFor { .. } = what { - return; - } - let (synthetic, concrete): (Vec<&&Impl>, Vec<&&Impl>) = traits.iter().partition(|t| t.inner_impl().synthetic); let (blanket_impl, concrete): (Vec<&&Impl>, _) = @@ -1967,14 +1958,9 @@ fn sidebar_deref_methods(cx: &Context<'_>, out: &mut Buffer, impl_: &Impl, v: &V .flat_map(|i| get_methods(i.inner_impl(), true, &mut used_links, deref_mut, c)) .collect::>(); if !ret.is_empty() { - let deref_id_map = cx.deref_id_map.borrow(); - let id = deref_id_map - .get(&real_target.def_id_full(c).unwrap()) - .expect("Deref section without derived id"); write!( out, - "Methods from {}<Target={}>", - id, + "Methods from {}<Target={}>", Escape(&format!("{:#}", impl_.inner_impl().trait_.as_ref().unwrap().print(cx))), Escape(&format!("{:#}", real_target.print(cx))), ); diff --git a/src/librustdoc/passes/collect_trait_impls.rs b/src/librustdoc/passes/collect_trait_impls.rs index 7b0b2f28fdfff..12f16c9359235 100644 --- a/src/librustdoc/passes/collect_trait_impls.rs +++ b/src/librustdoc/passes/collect_trait_impls.rs @@ -3,7 +3,7 @@ use crate::clean::*; use crate::core::DocContext; use crate::fold::DocFolder; -use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_data_structures::fx::FxHashSet; use rustc_hir::def_id::{DefId, LOCAL_CRATE}; use rustc_middle::ty::DefIdTree; use rustc_span::symbol::sym; @@ -53,6 +53,39 @@ crate fn collect_trait_impls(krate: Crate, cx: &mut DocContext<'_>) -> Crate { } } + let mut cleaner = BadImplStripper { prims, items: crate_items }; + + // scan through included items ahead of time to splice in Deref targets to the "valid" sets + for it in &new_items { + if let ImplItem(Impl { ref for_, ref trait_, ref items, .. }) = *it.kind { + if cleaner.keep_impl(for_) && trait_.def_id() == cx.tcx.lang_items().deref_trait() { + let target = items + .iter() + .find_map(|item| match *item.kind { + TypedefItem(ref t, true) => Some(&t.type_), + _ => None, + }) + .expect("Deref impl without Target type"); + + if let Some(prim) = target.primitive_type() { + cleaner.prims.insert(prim); + } else if let Some(did) = target.def_id() { + cleaner.items.insert(did); + } + } + } + } + + new_items.retain(|it| { + if let ImplItem(Impl { ref for_, ref trait_, ref blanket_impl, .. }) = *it.kind { + cleaner.keep_impl(for_) + || trait_.as_ref().map_or(false, |t| cleaner.keep_impl(t)) + || blanket_impl.is_some() + } else { + true + } + }); + // `tcx.crates()` doesn't include the local crate, and `tcx.all_trait_implementations` // doesn't work with it anyway, so pull them from the HIR map instead let mut extra_attrs = Vec::new(); @@ -84,53 +117,6 @@ crate fn collect_trait_impls(krate: Crate, cx: &mut DocContext<'_>) -> Crate { } } - let mut cleaner = BadImplStripper { prims, items: crate_items }; - - let mut type_did_to_deref_target: FxHashMap = FxHashMap::default(); - // Gather all type to `Deref` target edges. - for it in &new_items { - if let ImplItem(Impl { ref for_, ref trait_, ref items, .. }) = *it.kind { - if trait_.def_id() == cx.tcx.lang_items().deref_trait() { - let target = items.iter().find_map(|item| match *item.kind { - TypedefItem(ref t, true) => Some(&t.type_), - _ => None, - }); - if let (Some(for_did), Some(target)) = (for_.def_id(), target) { - type_did_to_deref_target.insert(for_did, target); - } - } - } - } - // Follow all `Deref` targets of included items and recursively add them as valid - fn add_deref_target( - map: &FxHashMap, - cleaner: &mut BadImplStripper, - type_did: &DefId, - ) { - if let Some(target) = map.get(type_did) { - debug!("add_deref_target: type {:?}, target {:?}", type_did, target); - if let Some(target_prim) = target.primitive_type() { - cleaner.prims.insert(target_prim); - } else if let Some(target_did) = target.def_id() { - // `impl Deref for S` - if target_did == *type_did { - // Avoid infinite cycles - return; - } - cleaner.items.insert(target_did); - add_deref_target(map, cleaner, &target_did); - } - } - } - for type_did in type_did_to_deref_target.keys() { - // Since only the `DefId` portion of the `Type` instances is known to be same for both the - // `Deref` target type and the impl for type positions, this map of types is keyed by - // `DefId` and for convenience uses a special cleaner that accepts `DefId`s directly. - if cleaner.keep_impl_with_def_id(type_did) { - add_deref_target(&type_did_to_deref_target, &mut cleaner, type_did); - } - } - let items = if let ModuleItem(Module { ref mut items, .. }) = *krate.module.kind { items } else { @@ -138,19 +124,7 @@ crate fn collect_trait_impls(krate: Crate, cx: &mut DocContext<'_>) -> Crate { }; items.extend(synth_impls); - for it in new_items.drain(..) { - if let ImplItem(Impl { ref for_, ref trait_, ref blanket_impl, .. }) = *it.kind { - if !(cleaner.keep_impl(for_) - || trait_.as_ref().map_or(false, |t| cleaner.keep_impl(t)) - || blanket_impl.is_some()) - { - continue; - } - } - - items.push(it); - } - + items.extend(new_items); krate } @@ -204,13 +178,9 @@ impl BadImplStripper { } else if let Some(prim) = ty.primitive_type() { self.prims.contains(&prim) } else if let Some(did) = ty.def_id() { - self.keep_impl_with_def_id(&did) + self.items.contains(&did) } else { false } } - - fn keep_impl_with_def_id(&self, did: &DefId) -> bool { - self.items.contains(did) - } } diff --git a/src/test/rustdoc-ui/deref-recursive-cycle.rs b/src/test/rustdoc-ui/deref-recursive-cycle.rs deleted file mode 100644 index 4cb518cbbbd5c..0000000000000 --- a/src/test/rustdoc-ui/deref-recursive-cycle.rs +++ /dev/null @@ -1,17 +0,0 @@ -// check-pass -// #26207: Ensure `Deref` cycles are properly handled without errors. - -#[derive(Copy, Clone)] -struct S; - -impl std::ops::Deref for S { - type Target = S; - - fn deref(&self) -> &S { - self - } -} - -fn main() { - let s: S = *******S; -} diff --git a/src/test/rustdoc/deref-recursive-pathbuf.rs b/src/test/rustdoc/deref-recursive-pathbuf.rs deleted file mode 100644 index 459a30060c623..0000000000000 --- a/src/test/rustdoc/deref-recursive-pathbuf.rs +++ /dev/null @@ -1,24 +0,0 @@ -// #26207: Show all methods reachable via Deref impls, recursing through multiple dereferencing -// levels and across multiple crates. - -// @has 'foo/struct.Foo.html' -// @has '-' '//*[@id="deref-methods-PathBuf"]' 'Methods from Deref' -// @has '-' '//*[@class="impl-items"]//*[@id="method.as_path"]' 'pub fn as_path(&self)' -// @has '-' '//*[@id="deref-methods-Path"]' 'Methods from Deref' -// @has '-' '//*[@class="impl-items"]//*[@id="method.exists"]' 'pub fn exists(&self)' -// @has '-' '//*[@class="sidebar-title"][@href="#deref-methods-PathBuf"]' 'Methods from Deref' -// @has '-' '//*[@class="sidebar-links"]/a[@href="#method.as_path"]' 'as_path' -// @has '-' '//*[@class="sidebar-title"][@href="#deref-methods-Path"]' 'Methods from Deref' -// @has '-' '//*[@class="sidebar-links"]/a[@href="#method.exists"]' 'exists' - -#![crate_name = "foo"] - -use std::ops::Deref; -use std::path::PathBuf; - -pub struct Foo(PathBuf); - -impl Deref for Foo { - type Target = PathBuf; - fn deref(&self) -> &PathBuf { &self.0 } -} diff --git a/src/test/rustdoc/deref-recursive.rs b/src/test/rustdoc/deref-recursive.rs deleted file mode 100644 index b96b5397ad78b..0000000000000 --- a/src/test/rustdoc/deref-recursive.rs +++ /dev/null @@ -1,40 +0,0 @@ -// #26207: Show all methods reachable via Deref impls, recursing through multiple dereferencing -// levels if needed. - -// @has 'foo/struct.Foo.html' -// @has '-' '//*[@id="deref-methods-Bar"]' 'Methods from Deref' -// @has '-' '//*[@class="impl-items"]//*[@id="method.bar"]' 'pub fn bar(&self)' -// @has '-' '//*[@id="deref-methods-Baz"]' 'Methods from Deref' -// @has '-' '//*[@class="impl-items"]//*[@id="method.baz"]' 'pub fn baz(&self)' -// @has '-' '//*[@class="sidebar-title"][@href="#deref-methods-Bar"]' 'Methods from Deref' -// @has '-' '//*[@class="sidebar-links"]/a[@href="#method.bar"]' 'bar' -// @has '-' '//*[@class="sidebar-title"][@href="#deref-methods-Baz"]' 'Methods from Deref' -// @has '-' '//*[@class="sidebar-links"]/a[@href="#method.baz"]' 'baz' - -#![crate_name = "foo"] - -use std::ops::Deref; - -pub struct Foo(Bar); -pub struct Bar(Baz); -pub struct Baz; - -impl Deref for Foo { - type Target = Bar; - fn deref(&self) -> &Bar { &self.0 } -} - -impl Deref for Bar { - type Target = Baz; - fn deref(&self) -> &Baz { &self.0 } -} - -impl Bar { - /// This appears under `Foo` methods - pub fn bar(&self) {} -} - -impl Baz { - /// This should also appear in `Foo` methods when recursing - pub fn baz(&self) {} -} diff --git a/src/test/rustdoc/deref-typedef.rs b/src/test/rustdoc/deref-typedef.rs index 47009559e6f74..3fc48b46d7410 100644 --- a/src/test/rustdoc/deref-typedef.rs +++ b/src/test/rustdoc/deref-typedef.rs @@ -1,12 +1,12 @@ #![crate_name = "foo"] // @has 'foo/struct.Bar.html' -// @has '-' '//*[@id="deref-methods-FooJ"]' 'Methods from Deref' +// @has '-' '//*[@id="deref-methods"]' 'Methods from Deref' // @has '-' '//*[@class="impl-items"]//*[@id="method.foo_a"]' 'pub fn foo_a(&self)' // @has '-' '//*[@class="impl-items"]//*[@id="method.foo_b"]' 'pub fn foo_b(&self)' // @has '-' '//*[@class="impl-items"]//*[@id="method.foo_c"]' 'pub fn foo_c(&self)' // @has '-' '//*[@class="impl-items"]//*[@id="method.foo_j"]' 'pub fn foo_j(&self)' -// @has '-' '//*[@class="sidebar-title"][@href="#deref-methods-FooJ"]' 'Methods from Deref' +// @has '-' '//*[@class="sidebar-title"][@href="#deref-methods"]' 'Methods from Deref' // @has '-' '//*[@class="sidebar-links"]/a[@href="#method.foo_a"]' 'foo_a' // @has '-' '//*[@class="sidebar-links"]/a[@href="#method.foo_b"]' 'foo_b' // @has '-' '//*[@class="sidebar-links"]/a[@href="#method.foo_c"]' 'foo_c' From 86e3f76b7148d26017f03ac9016a815459175589 Mon Sep 17 00:00:00 2001 From: "Felix S. Klock II" Date: Mon, 3 May 2021 10:06:57 -0400 Subject: [PATCH 10/18] regression test for issue 82465. --- .../issue-82465-asref-for-and-of-local.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 src/test/rustdoc/issue-82465-asref-for-and-of-local.rs diff --git a/src/test/rustdoc/issue-82465-asref-for-and-of-local.rs b/src/test/rustdoc/issue-82465-asref-for-and-of-local.rs new file mode 100644 index 0000000000000..618ac20ac487d --- /dev/null +++ b/src/test/rustdoc/issue-82465-asref-for-and-of-local.rs @@ -0,0 +1,16 @@ +use std::convert::AsRef; +pub struct Local; + +// @has issue_82465_asref_for_and_of_local/struct.Local.html '//code' 'impl AsRef for Local' +impl AsRef for Local { + fn as_ref(&self) -> &str { + todo!() + } +} + +// @has - '//code' 'impl AsRef for str' +impl AsRef for str { + fn as_ref(&self) -> &Local { + todo!() + } +} From 6eb4735acc50f58e501b42c5d75ae73b3d74b44d Mon Sep 17 00:00:00 2001 From: Joshua Nelson Date: Thu, 22 Apr 2021 13:28:43 -0400 Subject: [PATCH 11/18] Unify rustc and rustdoc parsing of `cfg()` This extracts a new `parse_cfg` function that's used between both. - Treat `#[doc(cfg(x), cfg(y))]` the same as `#[doc(cfg(x)] #[doc(cfg(y))]`. Previously it would be completely ignored. - Treat `#[doc(inline, cfg(x))]` the same as `#[doc(inline)] #[doc(cfg(x))]`. Previously, the cfg would be ignored. - Pass the cfg predicate through to rustc_expand to be validated Co-authored-by: Vadim Petrochenkov --- compiler/rustc_expand/src/config.rs | 54 +++++++++++++----------- src/librustdoc/clean/inline.rs | 4 +- src/librustdoc/clean/mod.rs | 2 +- src/librustdoc/clean/types.rs | 54 +++++++++--------------- src/librustdoc/doctest.rs | 2 +- src/librustdoc/html/render/context.rs | 2 +- src/librustdoc/html/render/print_item.rs | 2 +- src/test/rustdoc-ui/invalid-cfg.rs | 4 ++ src/test/rustdoc-ui/invalid-cfg.stderr | 14 ++++++ src/test/rustdoc/doc-cfg.rs | 8 ++++ 10 files changed, 82 insertions(+), 64 deletions(-) create mode 100644 src/test/rustdoc-ui/invalid-cfg.rs create mode 100644 src/test/rustdoc-ui/invalid-cfg.stderr diff --git a/compiler/rustc_expand/src/config.rs b/compiler/rustc_expand/src/config.rs index 03c83f9c07b5d..f9140609c0f3c 100644 --- a/compiler/rustc_expand/src/config.rs +++ b/compiler/rustc_expand/src/config.rs @@ -464,31 +464,9 @@ impl<'a> StripUnconfigured<'a> { return true; } }; - let error = |span, msg, suggestion: &str| { - let mut err = self.sess.parse_sess.span_diagnostic.struct_span_err(span, msg); - if !suggestion.is_empty() { - err.span_suggestion( - span, - "expected syntax is", - suggestion.into(), - Applicability::MaybeIncorrect, - ); - } - err.emit(); - true - }; - let span = meta_item.span; - match meta_item.meta_item_list() { - None => error(span, "`cfg` is not followed by parentheses", "cfg(/* predicate */)"), - Some([]) => error(span, "`cfg` predicate is not specified", ""), - Some([_, .., l]) => error(l.span(), "multiple `cfg` predicates are specified", ""), - Some([single]) => match single.meta_item() { - Some(meta_item) => { - attr::cfg_matches(meta_item, &self.sess.parse_sess, self.features) - } - None => error(single.span(), "`cfg` predicate key cannot be a literal", ""), - }, - } + parse_cfg(&meta_item, &self.sess).map_or(true, |meta_item| { + attr::cfg_matches(&meta_item, &self.sess.parse_sess, self.features) + }) }) } @@ -532,6 +510,32 @@ impl<'a> StripUnconfigured<'a> { } } +pub fn parse_cfg<'a>(meta_item: &'a MetaItem, sess: &Session) -> Option<&'a MetaItem> { + let error = |span, msg, suggestion: &str| { + let mut err = sess.parse_sess.span_diagnostic.struct_span_err(span, msg); + if !suggestion.is_empty() { + err.span_suggestion( + span, + "expected syntax is", + suggestion.into(), + Applicability::HasPlaceholders, + ); + } + err.emit(); + None + }; + let span = meta_item.span; + match meta_item.meta_item_list() { + None => error(span, "`cfg` is not followed by parentheses", "cfg(/* predicate */)"), + Some([]) => error(span, "`cfg` predicate is not specified", ""), + Some([_, .., l]) => error(l.span(), "multiple `cfg` predicates are specified", ""), + Some([single]) => match single.meta_item() { + Some(meta_item) => Some(meta_item), + None => error(single.span(), "`cfg` predicate key cannot be a literal", ""), + }, + } +} + fn is_cfg(sess: &Session, attr: &Attribute) -> bool { sess.check_name(attr, sym::cfg) } diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs index 3e89c1ac4c514..4c3b86b2e2b43 100644 --- a/src/librustdoc/clean/inline.rs +++ b/src/librustdoc/clean/inline.rs @@ -307,10 +307,10 @@ fn merge_attrs( } else { Attributes::from_ast(&both, None) }, - both.cfg(cx.sess().diagnostic()), + both.cfg(cx.sess()), ) } else { - (old_attrs.clean(cx), old_attrs.cfg(cx.sess().diagnostic())) + (old_attrs.clean(cx), old_attrs.cfg(cx.sess())) } } diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs index 6563f398edb6f..a7bc3c20a3d74 100644 --- a/src/librustdoc/clean/mod.rs +++ b/src/librustdoc/clean/mod.rs @@ -2006,7 +2006,7 @@ fn clean_extern_crate( def_id: crate_def_id, visibility: krate.vis.clean(cx), kind: box ExternCrateItem { src: orig_name }, - cfg: attrs.cfg(cx.sess().diagnostic()), + cfg: attrs.cfg(cx.sess()), }] } diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs index 5e47144588b3f..a2a03dfd15b7c 100644 --- a/src/librustdoc/clean/types.rs +++ b/src/librustdoc/clean/types.rs @@ -320,7 +320,7 @@ impl Item { kind, box ast_attrs.clean(cx), cx, - ast_attrs.cfg(cx.sess().diagnostic()), + ast_attrs.cfg(cx.sess()), ) } @@ -332,7 +332,7 @@ impl Item { cx: &mut DocContext<'_>, cfg: Option>, ) -> Item { - debug!("name={:?}, def_id={:?}", name, def_id); + trace!("name={:?}, def_id={:?}", name, def_id); Item { def_id, @@ -681,7 +681,7 @@ crate trait AttributesExt { fn other_attrs(&self) -> Vec; - fn cfg(&self, diagnostic: &::rustc_errors::Handler) -> Option>; + fn cfg(&self, sess: &Session) -> Option>; } impl AttributesExt for [ast::Attribute] { @@ -706,17 +706,28 @@ impl AttributesExt for [ast::Attribute] { self.iter().filter(|attr| attr.doc_str().is_none()).cloned().collect() } - fn cfg(&self, diagnostic: &::rustc_errors::Handler) -> Option> { + fn cfg(&self, sess: &Session) -> Option> { let mut cfg = Cfg::True; for attr in self.iter() { + // #[doc] if attr.doc_str().is_none() && attr.has_name(sym::doc) { - if let Some(mi) = attr.meta() { - if let Some(cfg_mi) = Attributes::extract_cfg(&mi) { - // Extracted #[doc(cfg(...))] - match Cfg::parse(cfg_mi) { - Ok(new_cfg) => cfg &= new_cfg, - Err(e) => diagnostic.span_err(e.span, e.msg), + // #[doc(...)] + if let Some(list) = attr.meta().as_ref().and_then(|mi| mi.meta_item_list()) { + for item in list { + // #[doc(include)] + if !item.has_name(sym::cfg) { + continue; + } + // #[doc(cfg(...))] + if let Some(cfg_mi) = item + .meta_item() + .and_then(|item| rustc_expand::config::parse_cfg(&item, sess)) + { + match Cfg::parse(&cfg_mi) { + Ok(new_cfg) => cfg &= new_cfg, + Err(e) => sess.span_err(e.span, e.msg), + } } } } @@ -883,29 +894,6 @@ impl Attributes { self.other_attrs.lists(name) } - /// Extracts the content from an attribute `#[doc(cfg(content))]`. - crate fn extract_cfg(mi: &ast::MetaItem) -> Option<&ast::MetaItem> { - use rustc_ast::NestedMetaItem::MetaItem; - - if let ast::MetaItemKind::List(ref nmis) = mi.kind { - if nmis.len() == 1 { - if let MetaItem(ref cfg_mi) = nmis[0] { - if cfg_mi.has_name(sym::cfg) { - if let ast::MetaItemKind::List(ref cfg_nmis) = cfg_mi.kind { - if cfg_nmis.len() == 1 { - if let MetaItem(ref content_mi) = cfg_nmis[0] { - return Some(content_mi); - } - } - } - } - } - } - } - - None - } - /// Reads a `MetaItem` from within an attribute, looks for whether it is a /// `#[doc(include="file")]`, and returns the filename and contents of the file as loaded from /// its expansion. diff --git a/src/librustdoc/doctest.rs b/src/librustdoc/doctest.rs index 466d1b65406cd..69a47c5b67a7a 100644 --- a/src/librustdoc/doctest.rs +++ b/src/librustdoc/doctest.rs @@ -1095,7 +1095,7 @@ impl<'a, 'hir, 'tcx> HirCollector<'a, 'hir, 'tcx> { let ast_attrs = self.tcx.hir().attrs(hir_id); let mut attrs = Attributes::from_ast(ast_attrs, None); - if let Some(ref cfg) = ast_attrs.cfg(self.sess.diagnostic()) { + if let Some(ref cfg) = ast_attrs.cfg(self.sess) { if !cfg.matches(&self.sess.parse_sess, Some(&self.sess.features_untracked())) { return; } diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs index 4c8ba0e7b496e..268974169ea85 100644 --- a/src/librustdoc/html/render/context.rs +++ b/src/librustdoc/html/render/context.rs @@ -154,7 +154,7 @@ impl<'tcx> Context<'tcx> { &self.cache } - fn sess(&self) -> &'tcx Session { + pub(super) fn sess(&self) -> &'tcx Session { &self.shared.tcx.sess } diff --git a/src/librustdoc/html/render/print_item.rs b/src/librustdoc/html/render/print_item.rs index 1bb1db00e8825..d33a31ef1ee25 100644 --- a/src/librustdoc/html/render/print_item.rs +++ b/src/librustdoc/html/render/print_item.rs @@ -292,7 +292,7 @@ fn item_module(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item, items: &[cl let import_item = clean::Item { def_id: import_def_id, attrs: import_attrs, - cfg: ast_attrs.cfg(cx.tcx().sess.diagnostic()), + cfg: ast_attrs.cfg(cx.sess()), ..myitem.clone() }; diff --git a/src/test/rustdoc-ui/invalid-cfg.rs b/src/test/rustdoc-ui/invalid-cfg.rs new file mode 100644 index 0000000000000..d237b8605c068 --- /dev/null +++ b/src/test/rustdoc-ui/invalid-cfg.rs @@ -0,0 +1,4 @@ +#![feature(doc_cfg)] +#[doc(cfg = "x")] //~ ERROR not followed by parentheses +#[doc(cfg(x, y))] //~ ERROR multiple `cfg` predicates +struct S {} diff --git a/src/test/rustdoc-ui/invalid-cfg.stderr b/src/test/rustdoc-ui/invalid-cfg.stderr new file mode 100644 index 0000000000000..dae238b052b8a --- /dev/null +++ b/src/test/rustdoc-ui/invalid-cfg.stderr @@ -0,0 +1,14 @@ +error: `cfg` is not followed by parentheses + --> $DIR/invalid-cfg.rs:2:7 + | +LL | #[doc(cfg = "x")] + | ^^^^^^^^^ help: expected syntax is: `cfg(/* predicate */)` + +error: multiple `cfg` predicates are specified + --> $DIR/invalid-cfg.rs:3:14 + | +LL | #[doc(cfg(x, y))] + | ^ + +error: aborting due to 2 previous errors + diff --git a/src/test/rustdoc/doc-cfg.rs b/src/test/rustdoc/doc-cfg.rs index 89a61a289fdeb..1fc80b3e76c53 100644 --- a/src/test/rustdoc/doc-cfg.rs +++ b/src/test/rustdoc/doc-cfg.rs @@ -91,3 +91,11 @@ pub unsafe fn uses_target_feature() { pub fn uses_cfg_target_feature() { uses_target_feature(); } + +// multiple attributes should be allowed +// @has doc_cfg/fn.multiple_attrs.html \ +// '//*[@id="main"]/*[@class="item-info"]/*[@class="stab portability"]' \ +// 'This is supported on x and y and z only.' +#[doc(inline, cfg(x))] +#[doc(cfg(y), cfg(z))] +pub fn multiple_attrs() {} From 389333a21c6a0ed51952c6d5d0b339e7d274ef2e Mon Sep 17 00:00:00 2001 From: Julian Frimmel Date: Sat, 27 Mar 2021 11:44:39 +0100 Subject: [PATCH 12/18] Update `ptr` docs with regards to `ptr::addr_of!` This updates the documentation since `ptr::addr_of!` and `ptr::addr_of_mut!` are now stable. One might remove the distinction between the sections `# On packed structs` and `# Examples`, as the old section on packed structs was primarily to prevent users of doing unde- fined behavior, which is not necessary anymore. There is also a new section in "how to obtain a pointer", which referen- ces the `ptr::addr_of!` macros. This commit contains squashed commits from code review. Co-authored-by: Joshua Nelson Co-authored-by: Mara Bos Co-authored-by: Soveu Co-authored-by: Ralf Jung --- library/core/src/ptr/mod.rs | 61 ++++++++++++------------------- library/std/src/primitive_docs.rs | 22 ++++++++++- 2 files changed, 44 insertions(+), 39 deletions(-) diff --git a/library/core/src/ptr/mod.rs b/library/core/src/ptr/mod.rs index 2392f0174b6f0..66d3626fe5d74 100644 --- a/library/core/src/ptr/mod.rs +++ b/library/core/src/ptr/mod.rs @@ -742,9 +742,6 @@ pub const unsafe fn read(src: *const T) -> T { /// /// ## On `packed` structs /// -/// It is currently impossible to create raw pointers to unaligned fields -/// of a packed struct. -/// /// Attempting to create a raw pointer to an `unaligned` struct field with /// an expression such as `&packed.unaligned as *const FieldType` creates an /// intermediate unaligned reference before converting that to a raw pointer. @@ -753,9 +750,13 @@ pub const unsafe fn read(src: *const T) -> T { /// As a result, using `&packed.unaligned as *const FieldType` causes immediate /// *undefined behavior* in your program. /// +/// Instead you must use the [`ptr::addr_of!`](addr_of) macro to +/// create the pointer. You may use that returned pointer together with this +/// function. +/// /// An example of what not to do and how this relates to `read_unaligned` is: /// -/// ```no_run +/// ``` /// #[repr(packed, C)] /// struct Packed { /// _padding: u8, @@ -767,24 +768,15 @@ pub const unsafe fn read(src: *const T) -> T { /// unaligned: 0x01020304, /// }; /// -/// #[allow(unaligned_references)] -/// let v = unsafe { -/// // Here we attempt to take the address of a 32-bit integer which is not aligned. -/// let unaligned = -/// // A temporary unaligned reference is created here which results in -/// // undefined behavior regardless of whether the reference is used or not. -/// &packed.unaligned -/// // Casting to a raw pointer doesn't help; the mistake already happened. -/// as *const u32; +/// // Take the address of a 32-bit integer which is not aligned. +/// // In contrast to `&packed.unaligned as *const _`, this has no undefined behavior. +/// let unaligned = std::ptr::addr_of!(packed.unaligned); /// -/// let v = std::ptr::read_unaligned(unaligned); -/// -/// v -/// }; +/// let v = unsafe { std::ptr::read_unaligned(unaligned) }; +/// assert_eq!(v, 0x01020304); /// ``` /// /// Accessing unaligned fields directly with e.g. `packed.unaligned` is safe however. -// FIXME: Update docs based on outcome of RFC #2582 and friends. /// /// # Examples /// @@ -938,9 +930,6 @@ pub const unsafe fn write(dst: *mut T, src: T) { /// /// ## On `packed` structs /// -/// It is currently impossible to create raw pointers to unaligned fields -/// of a packed struct. -/// /// Attempting to create a raw pointer to an `unaligned` struct field with /// an expression such as `&packed.unaligned as *const FieldType` creates an /// intermediate unaligned reference before converting that to a raw pointer. @@ -949,36 +938,32 @@ pub const unsafe fn write(dst: *mut T, src: T) { /// As a result, using `&packed.unaligned as *const FieldType` causes immediate /// *undefined behavior* in your program. /// -/// An example of what not to do and how this relates to `write_unaligned` is: +/// Instead you must use the [`ptr::addr_of_mut!`](addr_of_mut) +/// macro to create the pointer. You may use that returned pointer together with +/// this function. +/// +/// An example of how to do it and how this relates to `write_unaligned` is: /// -/// ```no_run +/// ``` /// #[repr(packed, C)] /// struct Packed { /// _padding: u8, /// unaligned: u32, /// } /// -/// let v = 0x01020304; /// let mut packed: Packed = unsafe { std::mem::zeroed() }; /// -/// #[allow(unaligned_references)] -/// let v = unsafe { -/// // Here we attempt to take the address of a 32-bit integer which is not aligned. -/// let unaligned = -/// // A temporary unaligned reference is created here which results in -/// // undefined behavior regardless of whether the reference is used or not. -/// &mut packed.unaligned -/// // Casting to a raw pointer doesn't help; the mistake already happened. -/// as *mut u32; +/// // Take the address of a 32-bit integer which is not aligned. +/// // In contrast to `&packed.unaligned as *mut _`, this has no undefined behavior. +/// let unaligned = std::ptr::addr_of_mut!(packed.unaligned); /// -/// std::ptr::write_unaligned(unaligned, v); +/// unsafe { std::ptr::write_unaligned(unaligned, 42) }; /// -/// v -/// }; +/// assert_eq!({packed.unaligned}, 42); // `{...}` forces copying the field instead of creating a reference. /// ``` /// -/// Accessing unaligned fields directly with e.g. `packed.unaligned` is safe however. -// FIXME: Update docs based on outcome of RFC #2582 and friends. +/// Accessing unaligned fields directly with e.g. `packed.unaligned` is safe however +/// (as can be seen in the `assert_eq!` above). /// /// # Examples /// diff --git a/library/std/src/primitive_docs.rs b/library/std/src/primitive_docs.rs index 64b22b64f4bf1..a37c92e92fe42 100644 --- a/library/std/src/primitive_docs.rs +++ b/library/std/src/primitive_docs.rs @@ -445,7 +445,27 @@ mod prim_unit {} /// Note that here the call to [`drop`] is for clarity - it indicates /// that we are done with the given value and it should be destroyed. /// -/// ## 3. Get it from C. +/// ## 3. Create it using `ptr::addr_of!` +/// +/// Instead of coercing a reference to a raw pointer, you can use the macros +/// [`ptr::addr_of!`] (for `*const T`) and [`ptr::addr_of_mut!`] (for `*mut T`). +/// These macros allow you to create raw pointers to fields to which you cannot +/// create a reference (without causing undefined behaviour), such as an +/// unaligned field. This might be necessary if packed structs or uninitialized +/// memory is involved. +/// +/// ``` +/// #[derive(Debug, Default, Copy, Clone)] +/// #[repr(C, packed)] +/// struct S { +/// aligned: u8, +/// unaligned: u32, +/// } +/// let s = S::default(); +/// let p = std::ptr::addr_of!(s.unaligned); // not allowed with coercion +/// ``` +/// +/// ## 4. Get it from C. /// /// ``` /// # #![feature(rustc_private)] From 450d121405ffbe563111dee5851929798bf48f39 Mon Sep 17 00:00:00 2001 From: Sunjay Varma Date: Wed, 10 Mar 2021 21:36:37 -0800 Subject: [PATCH 13/18] Tests for field is never read diagnostic --- .../dead-code/drop-only-field-issue-81658.rs | 42 ++++++++++++++++ .../drop-only-field-issue-81658.stderr | 14 ++++++ .../field-used-in-ffi-issue-81658.rs | 50 +++++++++++++++++++ .../field-used-in-ffi-issue-81658.stderr | 14 ++++++ 4 files changed, 120 insertions(+) create mode 100644 src/test/ui/lint/dead-code/drop-only-field-issue-81658.rs create mode 100644 src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr create mode 100644 src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.rs create mode 100644 src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr diff --git a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.rs b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.rs new file mode 100644 index 0000000000000..d28b6430bc587 --- /dev/null +++ b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.rs @@ -0,0 +1,42 @@ +//! The field `guard` is never used directly, but it is still useful for its side effect when +//! dropped. Since rustc doesn't consider a `Drop` impl as a use, we want to make sure we at least +//! produce a helpful diagnostic that points the user to what they can do if they indeed intended to +//! have a field that is only used for its `Drop` side effect. +//! +//! Issue: https://github.com/rust-lang/rust/issues/81658 + +#![deny(dead_code)] + +use std::sync::{Mutex, MutexGuard}; + +/// Holds a locked value until it is dropped +pub struct Locked<'a, T> { + // Field is kept for its affect when dropped, but otherwise unused + guard: MutexGuard<'a, T>, //~ ERROR field is never read +} + +impl<'a, T> Locked<'a, T> { + pub fn new(value: &'a Mutex) -> Self { + Self { + guard: value.lock().unwrap(), + } + } +} + +fn main() { + let items = Mutex::new(vec![1, 2, 3]); + + // Hold a lock on items while doing something else + let result = { + // The lock will be released at the end of this scope + let _lock = Locked::new(&items); + + do_something_else() + }; + + println!("{}", result); +} + +fn do_something_else() -> i32 { + 1 + 1 +} diff --git a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr new file mode 100644 index 0000000000000..c2a3e9d3c48b4 --- /dev/null +++ b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr @@ -0,0 +1,14 @@ +error: field is never read: `guard` + --> $DIR/drop-only-field-issue-81658.rs:15:5 + | +LL | guard: MutexGuard<'a, T>, + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | +note: the lint level is defined here + --> $DIR/drop-only-field-issue-81658.rs:8:9 + | +LL | #![deny(dead_code)] + | ^^^^^^^^^ + +error: aborting due to previous error + diff --git a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.rs b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.rs new file mode 100644 index 0000000000000..12eafe6ae4958 --- /dev/null +++ b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.rs @@ -0,0 +1,50 @@ +//! The field `items` is being "used" by FFI (implicitly through pointers). However, since rustc +//! doesn't know how to detect that, we produce a message that says the field is unused. This can +//! cause some confusion and we want to make sure our diagnostics help as much as they can. +//! +//! Issue: https://github.com/rust-lang/rust/issues/81658 + +#![deny(dead_code)] + +/// A struct for holding on to data while it is being used in our FFI code +pub struct FFIData { + /// These values cannot be dropped while the pointers to each item + /// are still in use + items: Option>, //~ ERROR field is never read +} + +impl FFIData { + pub fn new() -> Self { + Self {items: None} + } + + /// Load items into this type and return pointers to each item that can + /// be passed to FFI + pub fn load(&mut self, items: Vec) -> Vec<*const T> { + let ptrs = items.iter().map(|item| item as *const _).collect(); + + self.items = Some(items); + + ptrs + } +} + +extern { + /// The FFI code that uses items + fn process_item(item: *const i32); +} + +fn main() { + // Data cannot be dropped until the end of this scope or else the items + // will be dropped before they are processed + let mut data = FFIData::new(); + + let ptrs = data.load(vec![1, 2, 3, 4, 5]); + + for ptr in ptrs { + // Safety: This pointer is valid as long as the arena is in scope + unsafe { process_item(ptr); } + } + + // Items will be safely freed at the end of this scope +} diff --git a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr new file mode 100644 index 0000000000000..874afa110c433 --- /dev/null +++ b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr @@ -0,0 +1,14 @@ +error: field is never read: `items` + --> $DIR/field-used-in-ffi-issue-81658.rs:13:5 + | +LL | items: Option>, + | ^^^^^^^^^^^^^^^^^^^^^ + | +note: the lint level is defined here + --> $DIR/field-used-in-ffi-issue-81658.rs:7:9 + | +LL | #![deny(dead_code)] + | ^^^^^^^^^ + +error: aborting due to previous error + From 67f228ed0d02dabd0ee1eddb0466bc2888b9e2df Mon Sep 17 00:00:00 2001 From: Sunjay Varma Date: Thu, 11 Mar 2021 20:16:34 -0800 Subject: [PATCH 14/18] Added suggestion and note for when a field is never used --- compiler/rustc_passes/src/dead.rs | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/compiler/rustc_passes/src/dead.rs b/compiler/rustc_passes/src/dead.rs index d32180525bf70..ed487da5284d5 100644 --- a/compiler/rustc_passes/src/dead.rs +++ b/compiler/rustc_passes/src/dead.rs @@ -3,6 +3,7 @@ // from live codes are live, and everything else is dead. use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_errors::Applicability; use rustc_hir as hir; use rustc_hir::def::{CtorOf, DefKind, Res}; use rustc_hir::def_id::{DefId, LOCAL_CRATE}; @@ -579,7 +580,26 @@ impl DeadVisitor<'tcx> { self.tcx.struct_span_lint_hir(lint::builtin::DEAD_CODE, id, span, |lint| { let def_id = self.tcx.hir().local_def_id(id); let descr = self.tcx.def_kind(def_id).descr(def_id.to_def_id()); - lint.build(&format!("{} is never {}: `{}`", descr, participle, name)).emit() + + let prefixed = vec![(span, format!("_{}", name))]; + + let mut diag = + lint.build(&format!("{} is never {}: `{}`", descr, participle, name)); + diag.multipart_suggestion( + "if this is intentional, prefix it with an underscore", + prefixed, + Applicability::MachineApplicable, + ) + .note(&format!( + "the leading underscore helps signal to the reader that the {} may still serve\n\ + a purpose even if it isn't used in a way that we can detect (e.g. the {}\nis \ + only used through FFI or used only for its effect when dropped)", + descr, descr, + )); + // Force the note we added to the front, before any other subdiagnostics + diag.children.rotate_right(1); + + diag.emit() }); } } From 715a2d461f43d0b2948d86bcaee0185373a1a3f0 Mon Sep 17 00:00:00 2001 From: Sunjay Varma Date: Thu, 11 Mar 2021 21:43:26 -0800 Subject: [PATCH 15/18] Updating test stderr files --- .../associated-const-dead-code.stderr | 5 +- .../ui/derive-uninhabited-enum-38885.stderr | 5 +- src/test/ui/issues/issue-37515.stderr | 5 +- src/test/ui/lint/dead-code/basic.stderr | 5 +- .../ui/lint/dead-code/const-and-self.stderr | 11 +++- .../drop-only-field-issue-81658.stderr | 5 +- .../lint/dead-code/empty-unused-enum.stderr | 5 +- .../field-used-in-ffi-issue-81658.stderr | 5 +- src/test/ui/lint/dead-code/impl-trait.stderr | 5 +- .../ui/lint/dead-code/lint-dead-code-1.stderr | 59 +++++++++++++++---- .../ui/lint/dead-code/lint-dead-code-2.stderr | 17 +++++- .../ui/lint/dead-code/lint-dead-code-3.stderr | 29 +++++++-- .../ui/lint/dead-code/lint-dead-code-4.stderr | 59 +++++++++++++++---- .../ui/lint/dead-code/lint-dead-code-5.stderr | 23 ++++++-- .../ui/lint/dead-code/lint-dead-code-6.stderr | 23 ++++++-- .../ui/lint/dead-code/newline-span.stderr | 17 +++++- src/test/ui/lint/dead-code/type-alias.stderr | 5 +- src/test/ui/lint/dead-code/unused-enum.stderr | 17 +++++- .../dead-code/unused-struct-variant.stderr | 5 +- .../ui/lint/dead-code/unused-variant.stderr | 5 +- .../ui/lint/dead-code/with-core-crate.stderr | 5 +- .../ui/lint/dead-code/write-only-field.stderr | 35 +++++++++-- .../ui/lint/issue-17718-const-naming.stderr | 5 +- .../ui/span/macro-span-replacement.stderr | 5 +- .../unused-warning-point-at-identifier.stderr | 23 ++++++-- .../ui/test-attrs/test-warns-dead-code.stderr | 5 +- src/test/ui/union/union-fields-1.stderr | 23 ++++++-- src/test/ui/union/union-lint-dead-code.stderr | 5 +- 28 files changed, 342 insertions(+), 74 deletions(-) diff --git a/src/test/ui/associated-consts/associated-const-dead-code.stderr b/src/test/ui/associated-consts/associated-const-dead-code.stderr index 9b6bbb68a71f7..60c227ef557f5 100644 --- a/src/test/ui/associated-consts/associated-const-dead-code.stderr +++ b/src/test/ui/associated-consts/associated-const-dead-code.stderr @@ -2,8 +2,11 @@ error: associated constant is never used: `BAR` --> $DIR/associated-const-dead-code.rs:6:5 | LL | const BAR: u32 = 1; - | ^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_BAR` | + = note: the leading underscore helps signal to the reader that the associated constant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the associated constant + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/associated-const-dead-code.rs:1:9 | diff --git a/src/test/ui/derive-uninhabited-enum-38885.stderr b/src/test/ui/derive-uninhabited-enum-38885.stderr index 72607629d3c10..7aa5fc4d15b48 100644 --- a/src/test/ui/derive-uninhabited-enum-38885.stderr +++ b/src/test/ui/derive-uninhabited-enum-38885.stderr @@ -2,8 +2,11 @@ warning: variant is never constructed: `Void` --> $DIR/derive-uninhabited-enum-38885.rs:13:5 | LL | Void(Void), - | ^^^^^^^^^^ + | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Void` | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) = note: `-W dead-code` implied by `-W unused` warning: 1 warning emitted diff --git a/src/test/ui/issues/issue-37515.stderr b/src/test/ui/issues/issue-37515.stderr index 204a39bc8e8e9..683602ce8af97 100644 --- a/src/test/ui/issues/issue-37515.stderr +++ b/src/test/ui/issues/issue-37515.stderr @@ -2,8 +2,11 @@ warning: type alias is never used: `Z` --> $DIR/issue-37515.rs:5:1 | LL | type Z = dyn for<'x> Send; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Z` | + = note: the leading underscore helps signal to the reader that the type alias may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the type alias + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/issue-37515.rs:3:9 | diff --git a/src/test/ui/lint/dead-code/basic.stderr b/src/test/ui/lint/dead-code/basic.stderr index f7b9b9c613ae0..f42008b4f0d1b 100644 --- a/src/test/ui/lint/dead-code/basic.stderr +++ b/src/test/ui/lint/dead-code/basic.stderr @@ -2,8 +2,11 @@ error: function is never used: `foo` --> $DIR/basic.rs:4:4 | LL | fn foo() { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/basic.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/const-and-self.stderr b/src/test/ui/lint/dead-code/const-and-self.stderr index c0e406189e8ab..0e2e66cfef7b1 100644 --- a/src/test/ui/lint/dead-code/const-and-self.stderr +++ b/src/test/ui/lint/dead-code/const-and-self.stderr @@ -2,8 +2,11 @@ warning: variant is never constructed: `B` --> $DIR/const-and-self.rs:33:5 | LL | B, - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_B` | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/const-and-self.rs:3:9 | @@ -14,7 +17,11 @@ warning: variant is never constructed: `C` --> $DIR/const-and-self.rs:34:5 | LL | C, - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_C` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) warning: 2 warnings emitted diff --git a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr index c2a3e9d3c48b4..8c5a5f0a7e5bf 100644 --- a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr @@ -2,8 +2,11 @@ error: field is never read: `guard` --> $DIR/drop-only-field-issue-81658.rs:15:5 | LL | guard: MutexGuard<'a, T>, - | ^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_guard` | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/drop-only-field-issue-81658.rs:8:9 | diff --git a/src/test/ui/lint/dead-code/empty-unused-enum.stderr b/src/test/ui/lint/dead-code/empty-unused-enum.stderr index ed9a7ccd14b21..8e16d24c001d5 100644 --- a/src/test/ui/lint/dead-code/empty-unused-enum.stderr +++ b/src/test/ui/lint/dead-code/empty-unused-enum.stderr @@ -2,8 +2,11 @@ error: enum is never used: `E` --> $DIR/empty-unused-enum.rs:3:6 | LL | enum E {} - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_E` | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/empty-unused-enum.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr index 874afa110c433..d5b5ee777dc07 100644 --- a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr @@ -2,8 +2,11 @@ error: field is never read: `items` --> $DIR/field-used-in-ffi-issue-81658.rs:13:5 | LL | items: Option>, - | ^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_items` | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/field-used-in-ffi-issue-81658.rs:7:9 | diff --git a/src/test/ui/lint/dead-code/impl-trait.stderr b/src/test/ui/lint/dead-code/impl-trait.stderr index 09b6d08eb8fb8..fe3d4a8a214b6 100644 --- a/src/test/ui/lint/dead-code/impl-trait.stderr +++ b/src/test/ui/lint/dead-code/impl-trait.stderr @@ -2,8 +2,11 @@ error: type alias is never used: `Unused` --> $DIR/impl-trait.rs:12:1 | LL | type Unused = (); - | ^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` | + = note: the leading underscore helps signal to the reader that the type alias may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the type alias + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/impl-trait.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr index af97ea98b2b6d..7d1038db4b289 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr @@ -2,8 +2,11 @@ error: struct is never constructed: `Bar` --> $DIR/lint-dead-code-1.rs:12:16 | LL | pub struct Bar; - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/lint-dead-code-1.rs:5:9 | @@ -14,55 +17,91 @@ error: static is never used: `priv_static` --> $DIR/lint-dead-code-1.rs:20:1 | LL | static priv_static: isize = 0; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_static` + | + = note: the leading underscore helps signal to the reader that the static may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the static + is only used through FFI or used only for its effect when dropped) error: constant is never used: `priv_const` --> $DIR/lint-dead-code-1.rs:27:1 | LL | const priv_const: isize = 0; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_const` + | + = note: the leading underscore helps signal to the reader that the constant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the constant + is only used through FFI or used only for its effect when dropped) error: struct is never constructed: `PrivStruct` --> $DIR/lint-dead-code-1.rs:35:8 | LL | struct PrivStruct; - | ^^^^^^^^^^ + | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_PrivStruct` + | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) error: enum is never used: `priv_enum` --> $DIR/lint-dead-code-1.rs:64:6 | LL | enum priv_enum { foo2, bar2 } - | ^^^^^^^^^ + | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_enum` + | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) error: variant is never constructed: `bar3` --> $DIR/lint-dead-code-1.rs:67:5 | LL | bar3 - | ^^^^ + | ^^^^ help: if this is intentional, prefix it with an underscore: `_bar3` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: function is never used: `priv_fn` --> $DIR/lint-dead-code-1.rs:88:4 | LL | fn priv_fn() { - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_fn` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: function is never used: `foo` --> $DIR/lint-dead-code-1.rs:93:4 | LL | fn foo() { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: function is never used: `bar` --> $DIR/lint-dead-code-1.rs:98:4 | LL | fn bar() { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: function is never used: `baz` --> $DIR/lint-dead-code-1.rs:102:4 | LL | fn baz() -> impl Copy { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_baz` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr index b01ba57f98580..f840daee7a0c7 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr @@ -2,8 +2,11 @@ error: function is never used: `dead_fn` --> $DIR/lint-dead-code-2.rs:22:4 | LL | fn dead_fn() {} - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn` | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/lint-dead-code-2.rs:2:9 | @@ -14,13 +17,21 @@ error: function is never used: `dead_fn2` --> $DIR/lint-dead-code-2.rs:25:4 | LL | fn dead_fn2() {} - | ^^^^^^^^ + | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn2` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: function is never used: `main` --> $DIR/lint-dead-code-2.rs:38:4 | LL | fn main() { - | ^^^^ + | ^^^^ help: if this is intentional, prefix it with an underscore: `_main` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr index cf8f01ea19f0c..ad7fec0181519 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr @@ -2,8 +2,11 @@ error: struct is never constructed: `Foo` --> $DIR/lint-dead-code-3.rs:14:8 | LL | struct Foo; - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_Foo` | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/lint-dead-code-3.rs:4:9 | @@ -14,25 +17,41 @@ error: associated function is never used: `foo` --> $DIR/lint-dead-code-3.rs:16:8 | LL | fn foo(&self) { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` + | + = note: the leading underscore helps signal to the reader that the associated function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the associated function + is only used through FFI or used only for its effect when dropped) error: function is never used: `bar` --> $DIR/lint-dead-code-3.rs:21:4 | LL | fn bar() { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: enum is never used: `c_void` --> $DIR/lint-dead-code-3.rs:60:6 | LL | enum c_void {} - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c_void` + | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) error: function is never used: `free` --> $DIR/lint-dead-code-3.rs:62:5 | LL | fn free(p: *const c_void); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_free` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: aborting due to 5 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr index 3905d1a06bdfe..7fd275159c2eb 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr @@ -2,8 +2,11 @@ error: field is never read: `b` --> $DIR/lint-dead-code-4.rs:7:5 | LL | b: bool, - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/lint-dead-code-4.rs:3:9 | @@ -14,7 +17,11 @@ error: variant is never constructed: `X` --> $DIR/lint-dead-code-4.rs:15:5 | LL | X, - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_X` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: variant is never constructed: `Y` --> $DIR/lint-dead-code-4.rs:16:5 @@ -24,49 +31,81 @@ LL | | a: String, LL | | b: i32, LL | | c: i32, LL | | }, - | |_____^ + | |_____^ help: if this is intentional, prefix it with an underscore: `_Y` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: enum is never used: `ABC` --> $DIR/lint-dead-code-4.rs:24:6 | LL | enum ABC { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_ABC` + | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) error: variant is never constructed: `I` --> $DIR/lint-dead-code-4.rs:36:5 | LL | I, - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_I` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: field is never read: `b` --> $DIR/lint-dead-code-4.rs:39:9 | LL | b: i32, - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:40:9 | LL | c: i32, - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: variant is never constructed: `K` --> $DIR/lint-dead-code-4.rs:42:5 | LL | K - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_K` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: field is never read: `x` --> $DIR/lint-dead-code-4.rs:61:5 | LL | x: usize, - | ^^^^^^^^ + | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_x` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:63:5 | LL | c: bool, - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr index 519add826273f..d0868af5f4473 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr @@ -2,8 +2,11 @@ error: variant is never constructed: `Variant2` --> $DIR/lint-dead-code-5.rs:6:5 | LL | Variant2 - | ^^^^^^^^ + | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant2` | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/lint-dead-code-5.rs:2:9 | @@ -14,19 +17,31 @@ error: variant is never constructed: `Variant5` --> $DIR/lint-dead-code-5.rs:13:5 | LL | Variant5 { _x: isize }, - | ^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant5` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: variant is never constructed: `Variant6` --> $DIR/lint-dead-code-5.rs:14:5 | LL | Variant6(isize), - | ^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant6` + | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) error: enum is never used: `Enum3` --> $DIR/lint-dead-code-5.rs:35:6 | LL | enum Enum3 { - | ^^^^^ + | ^^^^^ help: if this is intentional, prefix it with an underscore: `_Enum3` + | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr index 7dc60730d6aad..687a49eb7619a 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr @@ -2,8 +2,11 @@ error: struct is never constructed: `UnusedStruct` --> $DIR/lint-dead-code-6.rs:3:8 | LL | struct UnusedStruct; - | ^^^^^^^^^^^^ + | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_UnusedStruct` | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/lint-dead-code-6.rs:1:9 | @@ -14,19 +17,31 @@ error: associated function is never used: `unused_impl_fn_1` --> $DIR/lint-dead-code-6.rs:5:8 | LL | fn unused_impl_fn_1() { - | ^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_1` + | + = note: the leading underscore helps signal to the reader that the associated function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the associated function + is only used through FFI or used only for its effect when dropped) error: associated function is never used: `unused_impl_fn_2` --> $DIR/lint-dead-code-6.rs:9:8 | LL | fn unused_impl_fn_2(var: i32) { - | ^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_2` + | + = note: the leading underscore helps signal to the reader that the associated function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the associated function + is only used through FFI or used only for its effect when dropped) error: associated function is never used: `unused_impl_fn_3` --> $DIR/lint-dead-code-6.rs:13:8 | LL | fn unused_impl_fn_3( - | ^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_3` + | + = note: the leading underscore helps signal to the reader that the associated function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the associated function + is only used through FFI or used only for its effect when dropped) error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/newline-span.stderr b/src/test/ui/lint/dead-code/newline-span.stderr index fd74405f2b648..b636079631c35 100644 --- a/src/test/ui/lint/dead-code/newline-span.stderr +++ b/src/test/ui/lint/dead-code/newline-span.stderr @@ -2,8 +2,11 @@ error: function is never used: `unused` --> $DIR/newline-span.rs:3:4 | LL | fn unused() { - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused` | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/newline-span.rs:1:9 | @@ -14,13 +17,21 @@ error: function is never used: `unused2` --> $DIR/newline-span.rs:7:4 | LL | fn unused2(var: i32) { - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused2` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: function is never used: `unused3` --> $DIR/newline-span.rs:11:4 | LL | fn unused3( - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused3` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/type-alias.stderr b/src/test/ui/lint/dead-code/type-alias.stderr index b2acd5d4213b3..5c11626bb1e44 100644 --- a/src/test/ui/lint/dead-code/type-alias.stderr +++ b/src/test/ui/lint/dead-code/type-alias.stderr @@ -2,8 +2,11 @@ error: type alias is never used: `Unused` --> $DIR/type-alias.rs:4:1 | LL | type Unused = u8; - | ^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` | + = note: the leading underscore helps signal to the reader that the type alias may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the type alias + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/type-alias.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-enum.stderr b/src/test/ui/lint/dead-code/unused-enum.stderr index 9f368fdd2f816..c71d305987c77 100644 --- a/src/test/ui/lint/dead-code/unused-enum.stderr +++ b/src/test/ui/lint/dead-code/unused-enum.stderr @@ -2,8 +2,11 @@ error: struct is never constructed: `F` --> $DIR/unused-enum.rs:3:8 | LL | struct F; - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_F` | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/unused-enum.rs:1:9 | @@ -15,13 +18,21 @@ error: struct is never constructed: `B` --> $DIR/unused-enum.rs:4:8 | LL | struct B; - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_B` + | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) error: enum is never used: `E` --> $DIR/unused-enum.rs:6:6 | LL | enum E { - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_E` + | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/unused-struct-variant.stderr b/src/test/ui/lint/dead-code/unused-struct-variant.stderr index b93d6d4ac1866..198986bde049d 100644 --- a/src/test/ui/lint/dead-code/unused-struct-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-struct-variant.stderr @@ -2,8 +2,11 @@ error: variant is never constructed: `Bar` --> $DIR/unused-struct-variant.rs:8:5 | LL | Bar(B), - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/unused-struct-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-variant.stderr b/src/test/ui/lint/dead-code/unused-variant.stderr index a547f5af4b082..5fff7b1fdb3e0 100644 --- a/src/test/ui/lint/dead-code/unused-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-variant.stderr @@ -2,8 +2,11 @@ error: variant is never constructed: `Variant1` --> $DIR/unused-variant.rs:5:5 | LL | Variant1, - | ^^^^^^^^ + | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant1` | + = note: the leading underscore helps signal to the reader that the variant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the variant + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/unused-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/with-core-crate.stderr b/src/test/ui/lint/dead-code/with-core-crate.stderr index 2c63e60d67609..ab4c1793b0667 100644 --- a/src/test/ui/lint/dead-code/with-core-crate.stderr +++ b/src/test/ui/lint/dead-code/with-core-crate.stderr @@ -2,8 +2,11 @@ error: function is never used: `foo` --> $DIR/with-core-crate.rs:7:4 | LL | fn foo() { - | ^^^ + | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/with-core-crate.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/write-only-field.stderr b/src/test/ui/lint/dead-code/write-only-field.stderr index a191d22c8b94c..a7dcb69e2e366 100644 --- a/src/test/ui/lint/dead-code/write-only-field.stderr +++ b/src/test/ui/lint/dead-code/write-only-field.stderr @@ -2,8 +2,11 @@ error: field is never read: `f` --> $DIR/write-only-field.rs:4:5 | LL | f: i32, - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/write-only-field.rs:1:9 | @@ -14,31 +17,51 @@ error: field is never read: `sub` --> $DIR/write-only-field.rs:5:5 | LL | sub: Sub, - | ^^^^^^^^ + | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `f` --> $DIR/write-only-field.rs:9:5 | LL | f: i32, - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `y` --> $DIR/write-only-field.rs:28:9 | LL | y: bool, - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `u` --> $DIR/write-only-field.rs:58:9 | LL | u: u32, - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_u` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `v` --> $DIR/write-only-field.rs:59:9 | LL | v: u32, - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: aborting due to 6 previous errors diff --git a/src/test/ui/lint/issue-17718-const-naming.stderr b/src/test/ui/lint/issue-17718-const-naming.stderr index ce4ebcb5e3ef6..f0d95f5b83d2f 100644 --- a/src/test/ui/lint/issue-17718-const-naming.stderr +++ b/src/test/ui/lint/issue-17718-const-naming.stderr @@ -2,8 +2,11 @@ error: constant is never used: `foo` --> $DIR/issue-17718-const-naming.rs:4:1 | LL | const foo: isize = 3; - | ^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_foo` | + = note: the leading underscore helps signal to the reader that the constant may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the constant + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/issue-17718-const-naming.rs:2:9 | diff --git a/src/test/ui/span/macro-span-replacement.stderr b/src/test/ui/span/macro-span-replacement.stderr index 45cf5f8688cd1..91f9f271e5ceb 100644 --- a/src/test/ui/span/macro-span-replacement.stderr +++ b/src/test/ui/span/macro-span-replacement.stderr @@ -2,11 +2,14 @@ warning: struct is never constructed: `S` --> $DIR/macro-span-replacement.rs:7:14 | LL | $b $a; - | ^ + | ^ help: if this is intentional, prefix it with an underscore: `_S` ... LL | m!(S struct); | ------------- in this macro invocation | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/macro-span-replacement.rs:3:9 | diff --git a/src/test/ui/span/unused-warning-point-at-identifier.stderr b/src/test/ui/span/unused-warning-point-at-identifier.stderr index 6ef877da122f5..21579fbd92b7c 100644 --- a/src/test/ui/span/unused-warning-point-at-identifier.stderr +++ b/src/test/ui/span/unused-warning-point-at-identifier.stderr @@ -2,8 +2,11 @@ warning: enum is never used: `Enum` --> $DIR/unused-warning-point-at-identifier.rs:5:6 | LL | enum Enum { - | ^^^^ + | ^^^^ help: if this is intentional, prefix it with an underscore: `_Enum` | + = note: the leading underscore helps signal to the reader that the enum may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the enum + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/unused-warning-point-at-identifier.rs:3:9 | @@ -15,19 +18,31 @@ warning: struct is never constructed: `Struct` --> $DIR/unused-warning-point-at-identifier.rs:12:8 | LL | struct Struct { - | ^^^^^^ + | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Struct` + | + = note: the leading underscore helps signal to the reader that the struct may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the struct + is only used through FFI or used only for its effect when dropped) warning: function is never used: `func` --> $DIR/unused-warning-point-at-identifier.rs:19:4 | LL | fn func() -> usize { - | ^^^^ + | ^^^^ help: if this is intentional, prefix it with an underscore: `_func` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) warning: function is never used: `func_complete_span` --> $DIR/unused-warning-point-at-identifier.rs:24:1 | LL | func_complete_span() - | ^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func_complete_span` + | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) warning: 4 warnings emitted diff --git a/src/test/ui/test-attrs/test-warns-dead-code.stderr b/src/test/ui/test-attrs/test-warns-dead-code.stderr index d3bcea2951364..d41a4e54985a2 100644 --- a/src/test/ui/test-attrs/test-warns-dead-code.stderr +++ b/src/test/ui/test-attrs/test-warns-dead-code.stderr @@ -2,8 +2,11 @@ error: function is never used: `dead` --> $DIR/test-warns-dead-code.rs:5:4 | LL | fn dead() {} - | ^^^^ + | ^^^^ help: if this is intentional, prefix it with an underscore: `_dead` | + = note: the leading underscore helps signal to the reader that the function may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the function + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/test-warns-dead-code.rs:3:9 | diff --git a/src/test/ui/union/union-fields-1.stderr b/src/test/ui/union/union-fields-1.stderr index 87621cc01b1b9..9c90e94ff91bf 100644 --- a/src/test/ui/union/union-fields-1.stderr +++ b/src/test/ui/union/union-fields-1.stderr @@ -2,8 +2,11 @@ error: field is never read: `c` --> $DIR/union-fields-1.rs:6:5 | LL | c: u8, - | ^^^^^ + | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/union-fields-1.rs:1:9 | @@ -14,19 +17,31 @@ error: field is never read: `a` --> $DIR/union-fields-1.rs:9:5 | LL | a: u8, - | ^^^^^ + | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `a` --> $DIR/union-fields-1.rs:13:20 | LL | union NoDropLike { a: u8 } - | ^^^^^ + | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: field is never read: `c` --> $DIR/union-fields-1.rs:18:5 | LL | c: u8, - | ^^^^^ + | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) error: aborting due to 4 previous errors diff --git a/src/test/ui/union/union-lint-dead-code.stderr b/src/test/ui/union/union-lint-dead-code.stderr index 7de70ec33801f..6dfeae0248455 100644 --- a/src/test/ui/union/union-lint-dead-code.stderr +++ b/src/test/ui/union/union-lint-dead-code.stderr @@ -2,8 +2,11 @@ error: field is never read: `b` --> $DIR/union-lint-dead-code.rs:5:5 | LL | b: bool, - | ^^^^^^^ + | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | + = note: the leading underscore helps signal to the reader that the field may still serve + a purpose even if it isn't used in a way that we can detect (e.g. the field + is only used through FFI or used only for its effect when dropped) note: the lint level is defined here --> $DIR/union-lint-dead-code.rs:1:9 | From d4c1ade08a9a81f607c55da63b186a253614b6b6 Mon Sep 17 00:00:00 2001 From: Sunjay Varma Date: Thu, 11 Mar 2021 23:00:22 -0800 Subject: [PATCH 16/18] Trying out a new message that works a little better for values *and* items --- compiler/rustc_passes/src/dead.rs | 9 +-- .../associated-const-dead-code.stderr | 7 +- .../ui/derive-uninhabited-enum-38885.stderr | 7 +- src/test/ui/issues/issue-37515.stderr | 7 +- src/test/ui/lint/dead-code/basic.stderr | 7 +- .../ui/lint/dead-code/const-and-self.stderr | 14 ++-- .../drop-only-field-issue-81658.stderr | 7 +- .../lint/dead-code/empty-unused-enum.stderr | 7 +- .../field-used-in-ffi-issue-81658.stderr | 7 +- src/test/ui/lint/dead-code/impl-trait.stderr | 7 +- .../ui/lint/dead-code/lint-dead-code-1.stderr | 70 +++++++++++-------- .../ui/lint/dead-code/lint-dead-code-2.stderr | 21 +++--- .../ui/lint/dead-code/lint-dead-code-3.stderr | 35 ++++++---- .../ui/lint/dead-code/lint-dead-code-4.stderr | 70 +++++++++++-------- .../ui/lint/dead-code/lint-dead-code-5.stderr | 28 ++++---- .../ui/lint/dead-code/lint-dead-code-6.stderr | 28 ++++---- .../ui/lint/dead-code/newline-span.stderr | 21 +++--- src/test/ui/lint/dead-code/type-alias.stderr | 7 +- src/test/ui/lint/dead-code/unused-enum.stderr | 21 +++--- .../dead-code/unused-struct-variant.stderr | 7 +- .../ui/lint/dead-code/unused-variant.stderr | 7 +- .../ui/lint/dead-code/with-core-crate.stderr | 7 +- .../ui/lint/dead-code/write-only-field.stderr | 42 ++++++----- .../ui/lint/issue-17718-const-naming.stderr | 7 +- .../ui/span/macro-span-replacement.stderr | 7 +- .../unused-warning-point-at-identifier.stderr | 28 ++++---- .../ui/test-attrs/test-warns-dead-code.stderr | 7 +- src/test/ui/union/union-fields-1.stderr | 28 ++++---- src/test/ui/union/union-lint-dead-code.stderr | 7 +- 29 files changed, 301 insertions(+), 226 deletions(-) diff --git a/compiler/rustc_passes/src/dead.rs b/compiler/rustc_passes/src/dead.rs index ed487da5284d5..8f5d3b7c99341 100644 --- a/compiler/rustc_passes/src/dead.rs +++ b/compiler/rustc_passes/src/dead.rs @@ -591,10 +591,11 @@ impl DeadVisitor<'tcx> { Applicability::MachineApplicable, ) .note(&format!( - "the leading underscore helps signal to the reader that the {} may still serve\n\ - a purpose even if it isn't used in a way that we can detect (e.g. the {}\nis \ - only used through FFI or used only for its effect when dropped)", - descr, descr, + "The leading underscore signals to the reader that while the {} may not be {}\n\ + by any Rust code, it still serves some other purpose that isn't detected by rustc.\n\ + (e.g. some values are used for their effect when dropped or used in FFI code\n\ + exclusively through raw pointers)", + descr, participle, )); // Force the note we added to the front, before any other subdiagnostics diag.children.rotate_right(1); diff --git a/src/test/ui/associated-consts/associated-const-dead-code.stderr b/src/test/ui/associated-consts/associated-const-dead-code.stderr index 60c227ef557f5..9cf817905cc0a 100644 --- a/src/test/ui/associated-consts/associated-const-dead-code.stderr +++ b/src/test/ui/associated-consts/associated-const-dead-code.stderr @@ -4,9 +4,10 @@ error: associated constant is never used: `BAR` LL | const BAR: u32 = 1; | ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_BAR` | - = note: the leading underscore helps signal to the reader that the associated constant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the associated constant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the associated constant may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/associated-const-dead-code.rs:1:9 | diff --git a/src/test/ui/derive-uninhabited-enum-38885.stderr b/src/test/ui/derive-uninhabited-enum-38885.stderr index 7aa5fc4d15b48..de151b915d0a7 100644 --- a/src/test/ui/derive-uninhabited-enum-38885.stderr +++ b/src/test/ui/derive-uninhabited-enum-38885.stderr @@ -4,9 +4,10 @@ warning: variant is never constructed: `Void` LL | Void(Void), | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Void` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) = note: `-W dead-code` implied by `-W unused` warning: 1 warning emitted diff --git a/src/test/ui/issues/issue-37515.stderr b/src/test/ui/issues/issue-37515.stderr index 683602ce8af97..02da48748ec13 100644 --- a/src/test/ui/issues/issue-37515.stderr +++ b/src/test/ui/issues/issue-37515.stderr @@ -4,9 +4,10 @@ warning: type alias is never used: `Z` LL | type Z = dyn for<'x> Send; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Z` | - = note: the leading underscore helps signal to the reader that the type alias may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the type alias - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the type alias may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/issue-37515.rs:3:9 | diff --git a/src/test/ui/lint/dead-code/basic.stderr b/src/test/ui/lint/dead-code/basic.stderr index f42008b4f0d1b..4b165c30003a6 100644 --- a/src/test/ui/lint/dead-code/basic.stderr +++ b/src/test/ui/lint/dead-code/basic.stderr @@ -4,9 +4,10 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/basic.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/const-and-self.stderr b/src/test/ui/lint/dead-code/const-and-self.stderr index 0e2e66cfef7b1..80da402f79817 100644 --- a/src/test/ui/lint/dead-code/const-and-self.stderr +++ b/src/test/ui/lint/dead-code/const-and-self.stderr @@ -4,9 +4,10 @@ warning: variant is never constructed: `B` LL | B, | ^ help: if this is intentional, prefix it with an underscore: `_B` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/const-and-self.rs:3:9 | @@ -19,9 +20,10 @@ warning: variant is never constructed: `C` LL | C, | ^ help: if this is intentional, prefix it with an underscore: `_C` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) warning: 2 warnings emitted diff --git a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr index 8c5a5f0a7e5bf..dc9dcb770df0b 100644 --- a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr @@ -4,9 +4,10 @@ error: field is never read: `guard` LL | guard: MutexGuard<'a, T>, | ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_guard` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/drop-only-field-issue-81658.rs:8:9 | diff --git a/src/test/ui/lint/dead-code/empty-unused-enum.stderr b/src/test/ui/lint/dead-code/empty-unused-enum.stderr index 8e16d24c001d5..8fa3ae27af3ea 100644 --- a/src/test/ui/lint/dead-code/empty-unused-enum.stderr +++ b/src/test/ui/lint/dead-code/empty-unused-enum.stderr @@ -4,9 +4,10 @@ error: enum is never used: `E` LL | enum E {} | ^ help: if this is intentional, prefix it with an underscore: `_E` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/empty-unused-enum.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr index d5b5ee777dc07..e2f6849304d39 100644 --- a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr @@ -4,9 +4,10 @@ error: field is never read: `items` LL | items: Option>, | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_items` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/field-used-in-ffi-issue-81658.rs:7:9 | diff --git a/src/test/ui/lint/dead-code/impl-trait.stderr b/src/test/ui/lint/dead-code/impl-trait.stderr index fe3d4a8a214b6..bca3c4002de70 100644 --- a/src/test/ui/lint/dead-code/impl-trait.stderr +++ b/src/test/ui/lint/dead-code/impl-trait.stderr @@ -4,9 +4,10 @@ error: type alias is never used: `Unused` LL | type Unused = (); | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` | - = note: the leading underscore helps signal to the reader that the type alias may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the type alias - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the type alias may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/impl-trait.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr index 7d1038db4b289..bd1de549134a0 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr @@ -4,9 +4,10 @@ error: struct is never constructed: `Bar` LL | pub struct Bar; | ^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/lint-dead-code-1.rs:5:9 | @@ -19,9 +20,10 @@ error: static is never used: `priv_static` LL | static priv_static: isize = 0; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_static` | - = note: the leading underscore helps signal to the reader that the static may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the static - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the static may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: constant is never used: `priv_const` --> $DIR/lint-dead-code-1.rs:27:1 @@ -29,9 +31,10 @@ error: constant is never used: `priv_const` LL | const priv_const: isize = 0; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_const` | - = note: the leading underscore helps signal to the reader that the constant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the constant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the constant may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: struct is never constructed: `PrivStruct` --> $DIR/lint-dead-code-1.rs:35:8 @@ -39,9 +42,10 @@ error: struct is never constructed: `PrivStruct` LL | struct PrivStruct; | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_PrivStruct` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: enum is never used: `priv_enum` --> $DIR/lint-dead-code-1.rs:64:6 @@ -49,9 +53,10 @@ error: enum is never used: `priv_enum` LL | enum priv_enum { foo2, bar2 } | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_enum` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: variant is never constructed: `bar3` --> $DIR/lint-dead-code-1.rs:67:5 @@ -59,9 +64,10 @@ error: variant is never constructed: `bar3` LL | bar3 | ^^^^ help: if this is intentional, prefix it with an underscore: `_bar3` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `priv_fn` --> $DIR/lint-dead-code-1.rs:88:4 @@ -69,9 +75,10 @@ error: function is never used: `priv_fn` LL | fn priv_fn() { | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_fn` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `foo` --> $DIR/lint-dead-code-1.rs:93:4 @@ -79,9 +86,10 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `bar` --> $DIR/lint-dead-code-1.rs:98:4 @@ -89,9 +97,10 @@ error: function is never used: `bar` LL | fn bar() { | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `baz` --> $DIR/lint-dead-code-1.rs:102:4 @@ -99,9 +108,10 @@ error: function is never used: `baz` LL | fn baz() -> impl Copy { | ^^^ help: if this is intentional, prefix it with an underscore: `_baz` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr index f840daee7a0c7..ecc0169eadd56 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr @@ -4,9 +4,10 @@ error: function is never used: `dead_fn` LL | fn dead_fn() {} | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/lint-dead-code-2.rs:2:9 | @@ -19,9 +20,10 @@ error: function is never used: `dead_fn2` LL | fn dead_fn2() {} | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn2` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `main` --> $DIR/lint-dead-code-2.rs:38:4 @@ -29,9 +31,10 @@ error: function is never used: `main` LL | fn main() { | ^^^^ help: if this is intentional, prefix it with an underscore: `_main` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr index ad7fec0181519..53ccae0f0cec6 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr @@ -4,9 +4,10 @@ error: struct is never constructed: `Foo` LL | struct Foo; | ^^^ help: if this is intentional, prefix it with an underscore: `_Foo` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/lint-dead-code-3.rs:4:9 | @@ -19,9 +20,10 @@ error: associated function is never used: `foo` LL | fn foo(&self) { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore helps signal to the reader that the associated function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the associated function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the associated function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `bar` --> $DIR/lint-dead-code-3.rs:21:4 @@ -29,9 +31,10 @@ error: function is never used: `bar` LL | fn bar() { | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: enum is never used: `c_void` --> $DIR/lint-dead-code-3.rs:60:6 @@ -39,9 +42,10 @@ error: enum is never used: `c_void` LL | enum c_void {} | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c_void` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `free` --> $DIR/lint-dead-code-3.rs:62:5 @@ -49,9 +53,10 @@ error: function is never used: `free` LL | fn free(p: *const c_void); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_free` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 5 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr index 7fd275159c2eb..23e4a5ca69187 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr @@ -4,9 +4,10 @@ error: field is never read: `b` LL | b: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/lint-dead-code-4.rs:3:9 | @@ -19,9 +20,10 @@ error: variant is never constructed: `X` LL | X, | ^ help: if this is intentional, prefix it with an underscore: `_X` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: variant is never constructed: `Y` --> $DIR/lint-dead-code-4.rs:16:5 @@ -33,9 +35,10 @@ LL | | c: i32, LL | | }, | |_____^ help: if this is intentional, prefix it with an underscore: `_Y` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: enum is never used: `ABC` --> $DIR/lint-dead-code-4.rs:24:6 @@ -43,9 +46,10 @@ error: enum is never used: `ABC` LL | enum ABC { | ^^^ help: if this is intentional, prefix it with an underscore: `_ABC` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: variant is never constructed: `I` --> $DIR/lint-dead-code-4.rs:36:5 @@ -53,9 +57,10 @@ error: variant is never constructed: `I` LL | I, | ^ help: if this is intentional, prefix it with an underscore: `_I` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `b` --> $DIR/lint-dead-code-4.rs:39:9 @@ -63,9 +68,10 @@ error: field is never read: `b` LL | b: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:40:9 @@ -73,9 +79,10 @@ error: field is never read: `c` LL | c: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: variant is never constructed: `K` --> $DIR/lint-dead-code-4.rs:42:5 @@ -83,9 +90,10 @@ error: variant is never constructed: `K` LL | K | ^ help: if this is intentional, prefix it with an underscore: `_K` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `x` --> $DIR/lint-dead-code-4.rs:61:5 @@ -93,9 +101,10 @@ error: field is never read: `x` LL | x: usize, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_x` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:63:5 @@ -103,9 +112,10 @@ error: field is never read: `c` LL | c: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr index d0868af5f4473..b0fcb9a199ca4 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr @@ -4,9 +4,10 @@ error: variant is never constructed: `Variant2` LL | Variant2 | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant2` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/lint-dead-code-5.rs:2:9 | @@ -19,9 +20,10 @@ error: variant is never constructed: `Variant5` LL | Variant5 { _x: isize }, | ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant5` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: variant is never constructed: `Variant6` --> $DIR/lint-dead-code-5.rs:14:5 @@ -29,9 +31,10 @@ error: variant is never constructed: `Variant6` LL | Variant6(isize), | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant6` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: enum is never used: `Enum3` --> $DIR/lint-dead-code-5.rs:35:6 @@ -39,9 +42,10 @@ error: enum is never used: `Enum3` LL | enum Enum3 { | ^^^^^ help: if this is intentional, prefix it with an underscore: `_Enum3` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr index 687a49eb7619a..58714084ed3b5 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr @@ -4,9 +4,10 @@ error: struct is never constructed: `UnusedStruct` LL | struct UnusedStruct; | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_UnusedStruct` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/lint-dead-code-6.rs:1:9 | @@ -19,9 +20,10 @@ error: associated function is never used: `unused_impl_fn_1` LL | fn unused_impl_fn_1() { | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_1` | - = note: the leading underscore helps signal to the reader that the associated function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the associated function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the associated function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: associated function is never used: `unused_impl_fn_2` --> $DIR/lint-dead-code-6.rs:9:8 @@ -29,9 +31,10 @@ error: associated function is never used: `unused_impl_fn_2` LL | fn unused_impl_fn_2(var: i32) { | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_2` | - = note: the leading underscore helps signal to the reader that the associated function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the associated function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the associated function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: associated function is never used: `unused_impl_fn_3` --> $DIR/lint-dead-code-6.rs:13:8 @@ -39,9 +42,10 @@ error: associated function is never used: `unused_impl_fn_3` LL | fn unused_impl_fn_3( | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_3` | - = note: the leading underscore helps signal to the reader that the associated function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the associated function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the associated function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/newline-span.stderr b/src/test/ui/lint/dead-code/newline-span.stderr index b636079631c35..cfe83cff7c5ea 100644 --- a/src/test/ui/lint/dead-code/newline-span.stderr +++ b/src/test/ui/lint/dead-code/newline-span.stderr @@ -4,9 +4,10 @@ error: function is never used: `unused` LL | fn unused() { | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/newline-span.rs:1:9 | @@ -19,9 +20,10 @@ error: function is never used: `unused2` LL | fn unused2(var: i32) { | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused2` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: function is never used: `unused3` --> $DIR/newline-span.rs:11:4 @@ -29,9 +31,10 @@ error: function is never used: `unused3` LL | fn unused3( | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused3` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/type-alias.stderr b/src/test/ui/lint/dead-code/type-alias.stderr index 5c11626bb1e44..3533209eb1ddf 100644 --- a/src/test/ui/lint/dead-code/type-alias.stderr +++ b/src/test/ui/lint/dead-code/type-alias.stderr @@ -4,9 +4,10 @@ error: type alias is never used: `Unused` LL | type Unused = u8; | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` | - = note: the leading underscore helps signal to the reader that the type alias may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the type alias - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the type alias may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/type-alias.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-enum.stderr b/src/test/ui/lint/dead-code/unused-enum.stderr index c71d305987c77..646ec2b701fee 100644 --- a/src/test/ui/lint/dead-code/unused-enum.stderr +++ b/src/test/ui/lint/dead-code/unused-enum.stderr @@ -4,9 +4,10 @@ error: struct is never constructed: `F` LL | struct F; | ^ help: if this is intentional, prefix it with an underscore: `_F` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/unused-enum.rs:1:9 | @@ -20,9 +21,10 @@ error: struct is never constructed: `B` LL | struct B; | ^ help: if this is intentional, prefix it with an underscore: `_B` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: enum is never used: `E` --> $DIR/unused-enum.rs:6:6 @@ -30,9 +32,10 @@ error: enum is never used: `E` LL | enum E { | ^ help: if this is intentional, prefix it with an underscore: `_E` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/unused-struct-variant.stderr b/src/test/ui/lint/dead-code/unused-struct-variant.stderr index 198986bde049d..9fe2259d89db7 100644 --- a/src/test/ui/lint/dead-code/unused-struct-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-struct-variant.stderr @@ -4,9 +4,10 @@ error: variant is never constructed: `Bar` LL | Bar(B), | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/unused-struct-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-variant.stderr b/src/test/ui/lint/dead-code/unused-variant.stderr index 5fff7b1fdb3e0..a8eacf580c257 100644 --- a/src/test/ui/lint/dead-code/unused-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-variant.stderr @@ -4,9 +4,10 @@ error: variant is never constructed: `Variant1` LL | Variant1, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant1` | - = note: the leading underscore helps signal to the reader that the variant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the variant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the variant may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/unused-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/with-core-crate.stderr b/src/test/ui/lint/dead-code/with-core-crate.stderr index ab4c1793b0667..386a17e953fac 100644 --- a/src/test/ui/lint/dead-code/with-core-crate.stderr +++ b/src/test/ui/lint/dead-code/with-core-crate.stderr @@ -4,9 +4,10 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/with-core-crate.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/write-only-field.stderr b/src/test/ui/lint/dead-code/write-only-field.stderr index a7dcb69e2e366..ac307de729ca5 100644 --- a/src/test/ui/lint/dead-code/write-only-field.stderr +++ b/src/test/ui/lint/dead-code/write-only-field.stderr @@ -4,9 +4,10 @@ error: field is never read: `f` LL | f: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/write-only-field.rs:1:9 | @@ -19,9 +20,10 @@ error: field is never read: `sub` LL | sub: Sub, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `f` --> $DIR/write-only-field.rs:9:5 @@ -29,9 +31,10 @@ error: field is never read: `f` LL | f: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `y` --> $DIR/write-only-field.rs:28:9 @@ -39,9 +42,10 @@ error: field is never read: `y` LL | y: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `u` --> $DIR/write-only-field.rs:58:9 @@ -49,9 +53,10 @@ error: field is never read: `u` LL | u: u32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_u` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `v` --> $DIR/write-only-field.rs:59:9 @@ -59,9 +64,10 @@ error: field is never read: `v` LL | v: u32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 6 previous errors diff --git a/src/test/ui/lint/issue-17718-const-naming.stderr b/src/test/ui/lint/issue-17718-const-naming.stderr index f0d95f5b83d2f..a7805c3b8788f 100644 --- a/src/test/ui/lint/issue-17718-const-naming.stderr +++ b/src/test/ui/lint/issue-17718-const-naming.stderr @@ -4,9 +4,10 @@ error: constant is never used: `foo` LL | const foo: isize = 3; | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore helps signal to the reader that the constant may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the constant - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the constant may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/issue-17718-const-naming.rs:2:9 | diff --git a/src/test/ui/span/macro-span-replacement.stderr b/src/test/ui/span/macro-span-replacement.stderr index 91f9f271e5ceb..b432bcb947eac 100644 --- a/src/test/ui/span/macro-span-replacement.stderr +++ b/src/test/ui/span/macro-span-replacement.stderr @@ -7,9 +7,10 @@ LL | $b $a; LL | m!(S struct); | ------------- in this macro invocation | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/macro-span-replacement.rs:3:9 | diff --git a/src/test/ui/span/unused-warning-point-at-identifier.stderr b/src/test/ui/span/unused-warning-point-at-identifier.stderr index 21579fbd92b7c..f6d8dad9b9090 100644 --- a/src/test/ui/span/unused-warning-point-at-identifier.stderr +++ b/src/test/ui/span/unused-warning-point-at-identifier.stderr @@ -4,9 +4,10 @@ warning: enum is never used: `Enum` LL | enum Enum { | ^^^^ help: if this is intentional, prefix it with an underscore: `_Enum` | - = note: the leading underscore helps signal to the reader that the enum may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the enum - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the enum may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/unused-warning-point-at-identifier.rs:3:9 | @@ -20,9 +21,10 @@ warning: struct is never constructed: `Struct` LL | struct Struct { | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Struct` | - = note: the leading underscore helps signal to the reader that the struct may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the struct - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the struct may not be constructed + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) warning: function is never used: `func` --> $DIR/unused-warning-point-at-identifier.rs:19:4 @@ -30,9 +32,10 @@ warning: function is never used: `func` LL | fn func() -> usize { | ^^^^ help: if this is intentional, prefix it with an underscore: `_func` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) warning: function is never used: `func_complete_span` --> $DIR/unused-warning-point-at-identifier.rs:24:1 @@ -40,9 +43,10 @@ warning: function is never used: `func_complete_span` LL | func_complete_span() | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func_complete_span` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) warning: 4 warnings emitted diff --git a/src/test/ui/test-attrs/test-warns-dead-code.stderr b/src/test/ui/test-attrs/test-warns-dead-code.stderr index d41a4e54985a2..0ab483e485c0f 100644 --- a/src/test/ui/test-attrs/test-warns-dead-code.stderr +++ b/src/test/ui/test-attrs/test-warns-dead-code.stderr @@ -4,9 +4,10 @@ error: function is never used: `dead` LL | fn dead() {} | ^^^^ help: if this is intentional, prefix it with an underscore: `_dead` | - = note: the leading underscore helps signal to the reader that the function may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the function - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the function may not be used + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/test-warns-dead-code.rs:3:9 | diff --git a/src/test/ui/union/union-fields-1.stderr b/src/test/ui/union/union-fields-1.stderr index 9c90e94ff91bf..1e0d6f48eb73a 100644 --- a/src/test/ui/union/union-fields-1.stderr +++ b/src/test/ui/union/union-fields-1.stderr @@ -4,9 +4,10 @@ error: field is never read: `c` LL | c: u8, | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/union-fields-1.rs:1:9 | @@ -19,9 +20,10 @@ error: field is never read: `a` LL | a: u8, | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `a` --> $DIR/union-fields-1.rs:13:20 @@ -29,9 +31,10 @@ error: field is never read: `a` LL | union NoDropLike { a: u8 } | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: field is never read: `c` --> $DIR/union-fields-1.rs:18:5 @@ -39,9 +42,10 @@ error: field is never read: `c` LL | c: u8, | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) error: aborting due to 4 previous errors diff --git a/src/test/ui/union/union-lint-dead-code.stderr b/src/test/ui/union/union-lint-dead-code.stderr index 6dfeae0248455..0e8546ec19803 100644 --- a/src/test/ui/union/union-lint-dead-code.stderr +++ b/src/test/ui/union/union-lint-dead-code.stderr @@ -4,9 +4,10 @@ error: field is never read: `b` LL | b: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | - = note: the leading underscore helps signal to the reader that the field may still serve - a purpose even if it isn't used in a way that we can detect (e.g. the field - is only used through FFI or used only for its effect when dropped) + = note: The leading underscore signals to the reader that while the field may not be read + by any Rust code, it still serves some other purpose that isn't detected by rustc. + (e.g. some values are used for their effect when dropped or used in FFI code + exclusively through raw pointers) note: the lint level is defined here --> $DIR/union-lint-dead-code.rs:1:9 | From bacfc349c7e8dfa803dd9287a965e698ae62efe9 Mon Sep 17 00:00:00 2001 From: Sunjay Varma Date: Fri, 12 Mar 2021 21:11:16 -0800 Subject: [PATCH 17/18] New shorter diagnostic note that is different for items versus fields --- compiler/rustc_passes/src/dead.rs | 54 +++++++++++---- .../associated-const-dead-code.stderr | 6 +- .../ui/derive-uninhabited-enum-38885.stderr | 6 +- src/test/ui/issues/issue-37515.stderr | 6 +- src/test/ui/lint/dead-code/basic.stderr | 6 +- .../ui/lint/dead-code/const-and-self.stderr | 12 ++-- .../drop-only-field-issue-81658.stderr | 7 +- .../lint/dead-code/empty-unused-enum.stderr | 6 +- .../field-used-in-ffi-issue-81658.stderr | 7 +- src/test/ui/lint/dead-code/impl-trait.stderr | 6 +- .../ui/lint/dead-code/lint-dead-code-1.stderr | 60 ++++++----------- .../ui/lint/dead-code/lint-dead-code-2.stderr | 18 ++--- .../ui/lint/dead-code/lint-dead-code-3.stderr | 30 +++------ .../ui/lint/dead-code/lint-dead-code-4.stderr | 65 +++++++------------ .../ui/lint/dead-code/lint-dead-code-5.stderr | 24 +++---- .../ui/lint/dead-code/lint-dead-code-6.stderr | 24 +++---- .../ui/lint/dead-code/newline-span.stderr | 18 ++--- src/test/ui/lint/dead-code/type-alias.stderr | 6 +- src/test/ui/lint/dead-code/unused-enum.stderr | 18 ++--- .../dead-code/unused-struct-variant.stderr | 6 +- .../ui/lint/dead-code/unused-variant.stderr | 6 +- .../ui/lint/dead-code/with-core-crate.stderr | 6 +- .../ui/lint/dead-code/write-only-field.stderr | 42 +++++------- .../ui/lint/issue-17718-const-naming.stderr | 6 +- .../ui/span/macro-span-replacement.stderr | 6 +- .../unused-warning-point-at-identifier.stderr | 24 +++---- .../ui/test-attrs/test-warns-dead-code.stderr | 6 +- src/test/ui/union/union-fields-1.stderr | 28 ++++---- src/test/ui/union/union-lint-dead-code.stderr | 7 +- 29 files changed, 207 insertions(+), 309 deletions(-) diff --git a/compiler/rustc_passes/src/dead.rs b/compiler/rustc_passes/src/dead.rs index 8f5d3b7c99341..3a399afb535b2 100644 --- a/compiler/rustc_passes/src/dead.rs +++ b/compiler/rustc_passes/src/dead.rs @@ -508,6 +508,13 @@ fn find_live<'tcx>( symbol_visitor.live_symbols } +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] +enum ExtraNote { + /// Use this to provide some examples in the diagnostic of potential other purposes for a value + /// or field that is dead code + OtherPurposeExamples, +} + struct DeadVisitor<'tcx> { tcx: TyCtxt<'tcx>, live_symbols: FxHashSet, @@ -575,6 +582,7 @@ impl DeadVisitor<'tcx> { span: rustc_span::Span, name: Symbol, participle: &str, + extra_note: Option, ) { if !name.as_str().starts_with('_') { self.tcx.struct_span_lint_hir(lint::builtin::DEAD_CODE, id, span, |lint| { @@ -585,19 +593,26 @@ impl DeadVisitor<'tcx> { let mut diag = lint.build(&format!("{} is never {}: `{}`", descr, participle, name)); + diag.multipart_suggestion( "if this is intentional, prefix it with an underscore", prefixed, Applicability::MachineApplicable, - ) - .note(&format!( - "The leading underscore signals to the reader that while the {} may not be {}\n\ - by any Rust code, it still serves some other purpose that isn't detected by rustc.\n\ - (e.g. some values are used for their effect when dropped or used in FFI code\n\ - exclusively through raw pointers)", - descr, participle, - )); + ); + + let mut note = format!( + "the leading underscore signals that this {} serves some other \ + purpose\neven if it isn't used in a way that we can detect.", + descr, + ); + if matches!(extra_note, Some(ExtraNote::OtherPurposeExamples)) { + note += " (e.g. for its effect\nwhen dropped or in foreign code)"; + } + + diag.note(¬e); + // Force the note we added to the front, before any other subdiagnostics + // added in lint.build(...) diag.children.rotate_right(1); diag.emit() @@ -646,7 +661,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { hir::ItemKind::Struct(..) => "constructed", // Issue #52325 _ => "used", }; - self.warn_dead_code(item.hir_id(), span, item.ident.name, participle); + self.warn_dead_code(item.hir_id(), span, item.ident.name, participle, None); } else { // Only continue if we didn't warn intravisit::walk_item(self, item); @@ -660,7 +675,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { id: hir::HirId, ) { if self.should_warn_about_variant(&variant) { - self.warn_dead_code(variant.id, variant.span, variant.ident.name, "constructed"); + self.warn_dead_code(variant.id, variant.span, variant.ident.name, "constructed", None); } else { intravisit::walk_variant(self, variant, g, id); } @@ -668,14 +683,20 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { fn visit_foreign_item(&mut self, fi: &'tcx hir::ForeignItem<'tcx>) { if self.should_warn_about_foreign_item(fi) { - self.warn_dead_code(fi.hir_id(), fi.span, fi.ident.name, "used"); + self.warn_dead_code(fi.hir_id(), fi.span, fi.ident.name, "used", None); } intravisit::walk_foreign_item(self, fi); } fn visit_field_def(&mut self, field: &'tcx hir::FieldDef<'tcx>) { if self.should_warn_about_field(&field) { - self.warn_dead_code(field.hir_id, field.span, field.ident.name, "read"); + self.warn_dead_code( + field.hir_id, + field.span, + field.ident.name, + "read", + Some(ExtraNote::OtherPurposeExamples), + ); } intravisit::walk_field_def(self, field); } @@ -689,6 +710,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { impl_item.span, impl_item.ident.name, "used", + None, ); } self.visit_nested_body(body_id) @@ -706,7 +728,13 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { } else { impl_item.ident.span }; - self.warn_dead_code(impl_item.hir_id(), span, impl_item.ident.name, "used"); + self.warn_dead_code( + impl_item.hir_id(), + span, + impl_item.ident.name, + "used", + None, + ); } self.visit_nested_body(body_id) } diff --git a/src/test/ui/associated-consts/associated-const-dead-code.stderr b/src/test/ui/associated-consts/associated-const-dead-code.stderr index 9cf817905cc0a..ebd21c66a98b1 100644 --- a/src/test/ui/associated-consts/associated-const-dead-code.stderr +++ b/src/test/ui/associated-consts/associated-const-dead-code.stderr @@ -4,10 +4,8 @@ error: associated constant is never used: `BAR` LL | const BAR: u32 = 1; | ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_BAR` | - = note: The leading underscore signals to the reader that while the associated constant may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this associated constant serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/associated-const-dead-code.rs:1:9 | diff --git a/src/test/ui/derive-uninhabited-enum-38885.stderr b/src/test/ui/derive-uninhabited-enum-38885.stderr index de151b915d0a7..1583420697898 100644 --- a/src/test/ui/derive-uninhabited-enum-38885.stderr +++ b/src/test/ui/derive-uninhabited-enum-38885.stderr @@ -4,10 +4,8 @@ warning: variant is never constructed: `Void` LL | Void(Void), | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Void` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. = note: `-W dead-code` implied by `-W unused` warning: 1 warning emitted diff --git a/src/test/ui/issues/issue-37515.stderr b/src/test/ui/issues/issue-37515.stderr index 02da48748ec13..70bb990445236 100644 --- a/src/test/ui/issues/issue-37515.stderr +++ b/src/test/ui/issues/issue-37515.stderr @@ -4,10 +4,8 @@ warning: type alias is never used: `Z` LL | type Z = dyn for<'x> Send; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Z` | - = note: The leading underscore signals to the reader that while the type alias may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this type alias serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/issue-37515.rs:3:9 | diff --git a/src/test/ui/lint/dead-code/basic.stderr b/src/test/ui/lint/dead-code/basic.stderr index 4b165c30003a6..40a1b69dc2fc7 100644 --- a/src/test/ui/lint/dead-code/basic.stderr +++ b/src/test/ui/lint/dead-code/basic.stderr @@ -4,10 +4,8 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/basic.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/const-and-self.stderr b/src/test/ui/lint/dead-code/const-and-self.stderr index 80da402f79817..b22fed0e537c1 100644 --- a/src/test/ui/lint/dead-code/const-and-self.stderr +++ b/src/test/ui/lint/dead-code/const-and-self.stderr @@ -4,10 +4,8 @@ warning: variant is never constructed: `B` LL | B, | ^ help: if this is intentional, prefix it with an underscore: `_B` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/const-and-self.rs:3:9 | @@ -20,10 +18,8 @@ warning: variant is never constructed: `C` LL | C, | ^ help: if this is intentional, prefix it with an underscore: `_C` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. warning: 2 warnings emitted diff --git a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr index dc9dcb770df0b..4418d8d5d3033 100644 --- a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr @@ -4,10 +4,9 @@ error: field is never read: `guard` LL | guard: MutexGuard<'a, T>, | ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_guard` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) note: the lint level is defined here --> $DIR/drop-only-field-issue-81658.rs:8:9 | diff --git a/src/test/ui/lint/dead-code/empty-unused-enum.stderr b/src/test/ui/lint/dead-code/empty-unused-enum.stderr index 8fa3ae27af3ea..bd62e9a984b1a 100644 --- a/src/test/ui/lint/dead-code/empty-unused-enum.stderr +++ b/src/test/ui/lint/dead-code/empty-unused-enum.stderr @@ -4,10 +4,8 @@ error: enum is never used: `E` LL | enum E {} | ^ help: if this is intentional, prefix it with an underscore: `_E` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/empty-unused-enum.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr index e2f6849304d39..fab196a267517 100644 --- a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr @@ -4,10 +4,9 @@ error: field is never read: `items` LL | items: Option>, | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_items` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) note: the lint level is defined here --> $DIR/field-used-in-ffi-issue-81658.rs:7:9 | diff --git a/src/test/ui/lint/dead-code/impl-trait.stderr b/src/test/ui/lint/dead-code/impl-trait.stderr index bca3c4002de70..cca84602ba857 100644 --- a/src/test/ui/lint/dead-code/impl-trait.stderr +++ b/src/test/ui/lint/dead-code/impl-trait.stderr @@ -4,10 +4,8 @@ error: type alias is never used: `Unused` LL | type Unused = (); | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` | - = note: The leading underscore signals to the reader that while the type alias may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this type alias serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/impl-trait.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr index bd1de549134a0..7ddc89c995760 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr @@ -4,10 +4,8 @@ error: struct is never constructed: `Bar` LL | pub struct Bar; | ^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-1.rs:5:9 | @@ -20,10 +18,8 @@ error: static is never used: `priv_static` LL | static priv_static: isize = 0; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_static` | - = note: The leading underscore signals to the reader that while the static may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this static serves some other purpose + even if it isn't used in a way that we can detect. error: constant is never used: `priv_const` --> $DIR/lint-dead-code-1.rs:27:1 @@ -31,10 +27,8 @@ error: constant is never used: `priv_const` LL | const priv_const: isize = 0; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_const` | - = note: The leading underscore signals to the reader that while the constant may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this constant serves some other purpose + even if it isn't used in a way that we can detect. error: struct is never constructed: `PrivStruct` --> $DIR/lint-dead-code-1.rs:35:8 @@ -42,10 +36,8 @@ error: struct is never constructed: `PrivStruct` LL | struct PrivStruct; | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_PrivStruct` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. error: enum is never used: `priv_enum` --> $DIR/lint-dead-code-1.rs:64:6 @@ -53,10 +45,8 @@ error: enum is never used: `priv_enum` LL | enum priv_enum { foo2, bar2 } | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_enum` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. error: variant is never constructed: `bar3` --> $DIR/lint-dead-code-1.rs:67:5 @@ -64,10 +54,8 @@ error: variant is never constructed: `bar3` LL | bar3 | ^^^^ help: if this is intentional, prefix it with an underscore: `_bar3` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `priv_fn` --> $DIR/lint-dead-code-1.rs:88:4 @@ -75,10 +63,8 @@ error: function is never used: `priv_fn` LL | fn priv_fn() { | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_fn` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `foo` --> $DIR/lint-dead-code-1.rs:93:4 @@ -86,10 +72,8 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `bar` --> $DIR/lint-dead-code-1.rs:98:4 @@ -97,10 +81,8 @@ error: function is never used: `bar` LL | fn bar() { | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `baz` --> $DIR/lint-dead-code-1.rs:102:4 @@ -108,10 +90,8 @@ error: function is never used: `baz` LL | fn baz() -> impl Copy { | ^^^ help: if this is intentional, prefix it with an underscore: `_baz` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr index ecc0169eadd56..dce763c5ed61f 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr @@ -4,10 +4,8 @@ error: function is never used: `dead_fn` LL | fn dead_fn() {} | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-2.rs:2:9 | @@ -20,10 +18,8 @@ error: function is never used: `dead_fn2` LL | fn dead_fn2() {} | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn2` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `main` --> $DIR/lint-dead-code-2.rs:38:4 @@ -31,10 +27,8 @@ error: function is never used: `main` LL | fn main() { | ^^^^ help: if this is intentional, prefix it with an underscore: `_main` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr index 53ccae0f0cec6..a5ecc91edb060 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr @@ -4,10 +4,8 @@ error: struct is never constructed: `Foo` LL | struct Foo; | ^^^ help: if this is intentional, prefix it with an underscore: `_Foo` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-3.rs:4:9 | @@ -20,10 +18,8 @@ error: associated function is never used: `foo` LL | fn foo(&self) { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: The leading underscore signals to the reader that while the associated function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this associated function serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `bar` --> $DIR/lint-dead-code-3.rs:21:4 @@ -31,10 +27,8 @@ error: function is never used: `bar` LL | fn bar() { | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: enum is never used: `c_void` --> $DIR/lint-dead-code-3.rs:60:6 @@ -42,10 +36,8 @@ error: enum is never used: `c_void` LL | enum c_void {} | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c_void` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `free` --> $DIR/lint-dead-code-3.rs:62:5 @@ -53,10 +45,8 @@ error: function is never used: `free` LL | fn free(p: *const c_void); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_free` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 5 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr index 23e4a5ca69187..2297c172fc987 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr @@ -4,10 +4,9 @@ error: field is never read: `b` LL | b: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) note: the lint level is defined here --> $DIR/lint-dead-code-4.rs:3:9 | @@ -20,10 +19,8 @@ error: variant is never constructed: `X` LL | X, | ^ help: if this is intentional, prefix it with an underscore: `_X` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: variant is never constructed: `Y` --> $DIR/lint-dead-code-4.rs:16:5 @@ -35,10 +32,8 @@ LL | | c: i32, LL | | }, | |_____^ help: if this is intentional, prefix it with an underscore: `_Y` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: enum is never used: `ABC` --> $DIR/lint-dead-code-4.rs:24:6 @@ -46,10 +41,8 @@ error: enum is never used: `ABC` LL | enum ABC { | ^^^ help: if this is intentional, prefix it with an underscore: `_ABC` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. error: variant is never constructed: `I` --> $DIR/lint-dead-code-4.rs:36:5 @@ -57,10 +50,8 @@ error: variant is never constructed: `I` LL | I, | ^ help: if this is intentional, prefix it with an underscore: `_I` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: field is never read: `b` --> $DIR/lint-dead-code-4.rs:39:9 @@ -68,10 +59,9 @@ error: field is never read: `b` LL | b: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:40:9 @@ -79,10 +69,9 @@ error: field is never read: `c` LL | c: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: variant is never constructed: `K` --> $DIR/lint-dead-code-4.rs:42:5 @@ -90,10 +79,8 @@ error: variant is never constructed: `K` LL | K | ^ help: if this is intentional, prefix it with an underscore: `_K` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: field is never read: `x` --> $DIR/lint-dead-code-4.rs:61:5 @@ -101,10 +88,9 @@ error: field is never read: `x` LL | x: usize, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_x` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:63:5 @@ -112,10 +98,9 @@ error: field is never read: `c` LL | c: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr index b0fcb9a199ca4..afe159c2d8bba 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr @@ -4,10 +4,8 @@ error: variant is never constructed: `Variant2` LL | Variant2 | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant2` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-5.rs:2:9 | @@ -20,10 +18,8 @@ error: variant is never constructed: `Variant5` LL | Variant5 { _x: isize }, | ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant5` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: variant is never constructed: `Variant6` --> $DIR/lint-dead-code-5.rs:14:5 @@ -31,10 +27,8 @@ error: variant is never constructed: `Variant6` LL | Variant6(isize), | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant6` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. error: enum is never used: `Enum3` --> $DIR/lint-dead-code-5.rs:35:6 @@ -42,10 +36,8 @@ error: enum is never used: `Enum3` LL | enum Enum3 { | ^^^^^ help: if this is intentional, prefix it with an underscore: `_Enum3` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr index 58714084ed3b5..d212a4bc443d9 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr @@ -4,10 +4,8 @@ error: struct is never constructed: `UnusedStruct` LL | struct UnusedStruct; | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_UnusedStruct` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-6.rs:1:9 | @@ -20,10 +18,8 @@ error: associated function is never used: `unused_impl_fn_1` LL | fn unused_impl_fn_1() { | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_1` | - = note: The leading underscore signals to the reader that while the associated function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this associated function serves some other purpose + even if it isn't used in a way that we can detect. error: associated function is never used: `unused_impl_fn_2` --> $DIR/lint-dead-code-6.rs:9:8 @@ -31,10 +27,8 @@ error: associated function is never used: `unused_impl_fn_2` LL | fn unused_impl_fn_2(var: i32) { | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_2` | - = note: The leading underscore signals to the reader that while the associated function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this associated function serves some other purpose + even if it isn't used in a way that we can detect. error: associated function is never used: `unused_impl_fn_3` --> $DIR/lint-dead-code-6.rs:13:8 @@ -42,10 +36,8 @@ error: associated function is never used: `unused_impl_fn_3` LL | fn unused_impl_fn_3( | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_3` | - = note: The leading underscore signals to the reader that while the associated function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this associated function serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/newline-span.stderr b/src/test/ui/lint/dead-code/newline-span.stderr index cfe83cff7c5ea..b57df1dfcedb4 100644 --- a/src/test/ui/lint/dead-code/newline-span.stderr +++ b/src/test/ui/lint/dead-code/newline-span.stderr @@ -4,10 +4,8 @@ error: function is never used: `unused` LL | fn unused() { | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/newline-span.rs:1:9 | @@ -20,10 +18,8 @@ error: function is never used: `unused2` LL | fn unused2(var: i32) { | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused2` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: function is never used: `unused3` --> $DIR/newline-span.rs:11:4 @@ -31,10 +27,8 @@ error: function is never used: `unused3` LL | fn unused3( | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused3` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/type-alias.stderr b/src/test/ui/lint/dead-code/type-alias.stderr index 3533209eb1ddf..3e7298a6f2d3e 100644 --- a/src/test/ui/lint/dead-code/type-alias.stderr +++ b/src/test/ui/lint/dead-code/type-alias.stderr @@ -4,10 +4,8 @@ error: type alias is never used: `Unused` LL | type Unused = u8; | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` | - = note: The leading underscore signals to the reader that while the type alias may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this type alias serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/type-alias.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-enum.stderr b/src/test/ui/lint/dead-code/unused-enum.stderr index 646ec2b701fee..6e65e6565076f 100644 --- a/src/test/ui/lint/dead-code/unused-enum.stderr +++ b/src/test/ui/lint/dead-code/unused-enum.stderr @@ -4,10 +4,8 @@ error: struct is never constructed: `F` LL | struct F; | ^ help: if this is intentional, prefix it with an underscore: `_F` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-enum.rs:1:9 | @@ -21,10 +19,8 @@ error: struct is never constructed: `B` LL | struct B; | ^ help: if this is intentional, prefix it with an underscore: `_B` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. error: enum is never used: `E` --> $DIR/unused-enum.rs:6:6 @@ -32,10 +28,8 @@ error: enum is never used: `E` LL | enum E { | ^ help: if this is intentional, prefix it with an underscore: `_E` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/unused-struct-variant.stderr b/src/test/ui/lint/dead-code/unused-struct-variant.stderr index 9fe2259d89db7..a5c7eea0579e6 100644 --- a/src/test/ui/lint/dead-code/unused-struct-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-struct-variant.stderr @@ -4,10 +4,8 @@ error: variant is never constructed: `Bar` LL | Bar(B), | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-struct-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-variant.stderr b/src/test/ui/lint/dead-code/unused-variant.stderr index a8eacf580c257..9536c492fc04f 100644 --- a/src/test/ui/lint/dead-code/unused-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-variant.stderr @@ -4,10 +4,8 @@ error: variant is never constructed: `Variant1` LL | Variant1, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant1` | - = note: The leading underscore signals to the reader that while the variant may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this variant serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/with-core-crate.stderr b/src/test/ui/lint/dead-code/with-core-crate.stderr index 386a17e953fac..563b0b65020ee 100644 --- a/src/test/ui/lint/dead-code/with-core-crate.stderr +++ b/src/test/ui/lint/dead-code/with-core-crate.stderr @@ -4,10 +4,8 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/with-core-crate.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/write-only-field.stderr b/src/test/ui/lint/dead-code/write-only-field.stderr index ac307de729ca5..f750beade18ec 100644 --- a/src/test/ui/lint/dead-code/write-only-field.stderr +++ b/src/test/ui/lint/dead-code/write-only-field.stderr @@ -4,10 +4,9 @@ error: field is never read: `f` LL | f: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) note: the lint level is defined here --> $DIR/write-only-field.rs:1:9 | @@ -20,10 +19,9 @@ error: field is never read: `sub` LL | sub: Sub, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `f` --> $DIR/write-only-field.rs:9:5 @@ -31,10 +29,9 @@ error: field is never read: `f` LL | f: i32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `y` --> $DIR/write-only-field.rs:28:9 @@ -42,10 +39,9 @@ error: field is never read: `y` LL | y: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `u` --> $DIR/write-only-field.rs:58:9 @@ -53,10 +49,9 @@ error: field is never read: `u` LL | u: u32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_u` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `v` --> $DIR/write-only-field.rs:59:9 @@ -64,10 +59,9 @@ error: field is never read: `v` LL | v: u32, | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: aborting due to 6 previous errors diff --git a/src/test/ui/lint/issue-17718-const-naming.stderr b/src/test/ui/lint/issue-17718-const-naming.stderr index a7805c3b8788f..0bafca2e4d785 100644 --- a/src/test/ui/lint/issue-17718-const-naming.stderr +++ b/src/test/ui/lint/issue-17718-const-naming.stderr @@ -4,10 +4,8 @@ error: constant is never used: `foo` LL | const foo: isize = 3; | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: The leading underscore signals to the reader that while the constant may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this constant serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/issue-17718-const-naming.rs:2:9 | diff --git a/src/test/ui/span/macro-span-replacement.stderr b/src/test/ui/span/macro-span-replacement.stderr index b432bcb947eac..d5fad7c3b88ec 100644 --- a/src/test/ui/span/macro-span-replacement.stderr +++ b/src/test/ui/span/macro-span-replacement.stderr @@ -7,10 +7,8 @@ LL | $b $a; LL | m!(S struct); | ------------- in this macro invocation | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/macro-span-replacement.rs:3:9 | diff --git a/src/test/ui/span/unused-warning-point-at-identifier.stderr b/src/test/ui/span/unused-warning-point-at-identifier.stderr index f6d8dad9b9090..0bf85d252d60c 100644 --- a/src/test/ui/span/unused-warning-point-at-identifier.stderr +++ b/src/test/ui/span/unused-warning-point-at-identifier.stderr @@ -4,10 +4,8 @@ warning: enum is never used: `Enum` LL | enum Enum { | ^^^^ help: if this is intentional, prefix it with an underscore: `_Enum` | - = note: The leading underscore signals to the reader that while the enum may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this enum serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-warning-point-at-identifier.rs:3:9 | @@ -21,10 +19,8 @@ warning: struct is never constructed: `Struct` LL | struct Struct { | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Struct` | - = note: The leading underscore signals to the reader that while the struct may not be constructed - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this struct serves some other purpose + even if it isn't used in a way that we can detect. warning: function is never used: `func` --> $DIR/unused-warning-point-at-identifier.rs:19:4 @@ -32,10 +28,8 @@ warning: function is never used: `func` LL | fn func() -> usize { | ^^^^ help: if this is intentional, prefix it with an underscore: `_func` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. warning: function is never used: `func_complete_span` --> $DIR/unused-warning-point-at-identifier.rs:24:1 @@ -43,10 +37,8 @@ warning: function is never used: `func_complete_span` LL | func_complete_span() | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func_complete_span` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. warning: 4 warnings emitted diff --git a/src/test/ui/test-attrs/test-warns-dead-code.stderr b/src/test/ui/test-attrs/test-warns-dead-code.stderr index 0ab483e485c0f..795a9fb8820ce 100644 --- a/src/test/ui/test-attrs/test-warns-dead-code.stderr +++ b/src/test/ui/test-attrs/test-warns-dead-code.stderr @@ -4,10 +4,8 @@ error: function is never used: `dead` LL | fn dead() {} | ^^^^ help: if this is intentional, prefix it with an underscore: `_dead` | - = note: The leading underscore signals to the reader that while the function may not be used - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this function serves some other purpose + even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/test-warns-dead-code.rs:3:9 | diff --git a/src/test/ui/union/union-fields-1.stderr b/src/test/ui/union/union-fields-1.stderr index 1e0d6f48eb73a..e1695ca12cf72 100644 --- a/src/test/ui/union/union-fields-1.stderr +++ b/src/test/ui/union/union-fields-1.stderr @@ -4,10 +4,9 @@ error: field is never read: `c` LL | c: u8, | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) note: the lint level is defined here --> $DIR/union-fields-1.rs:1:9 | @@ -20,10 +19,9 @@ error: field is never read: `a` LL | a: u8, | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `a` --> $DIR/union-fields-1.rs:13:20 @@ -31,10 +29,9 @@ error: field is never read: `a` LL | union NoDropLike { a: u8 } | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: field is never read: `c` --> $DIR/union-fields-1.rs:18:5 @@ -42,10 +39,9 @@ error: field is never read: `c` LL | c: u8, | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) error: aborting due to 4 previous errors diff --git a/src/test/ui/union/union-lint-dead-code.stderr b/src/test/ui/union/union-lint-dead-code.stderr index 0e8546ec19803..565e13fb2ae1f 100644 --- a/src/test/ui/union/union-lint-dead-code.stderr +++ b/src/test/ui/union/union-lint-dead-code.stderr @@ -4,10 +4,9 @@ error: field is never read: `b` LL | b: bool, | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` | - = note: The leading underscore signals to the reader that while the field may not be read - by any Rust code, it still serves some other purpose that isn't detected by rustc. - (e.g. some values are used for their effect when dropped or used in FFI code - exclusively through raw pointers) + = note: the leading underscore signals that this field serves some other purpose + even if it isn't used in a way that we can detect. (e.g. for its effect + when dropped or in foreign code) note: the lint level is defined here --> $DIR/union-lint-dead-code.rs:1:9 | From 0ba2c6afa9b4d5f0db36ea2a9f71db0c125040b1 Mon Sep 17 00:00:00 2001 From: Sunjay Varma Date: Wed, 24 Mar 2021 20:23:49 -0700 Subject: [PATCH 18/18] Putting help message only under the identifier that needs to be prefixed --- compiler/rustc_passes/src/dead.rs | 28 ++++----- .../associated-const-dead-code.stderr | 7 ++- .../ui/derive-uninhabited-enum-38885.stderr | 7 ++- src/test/ui/issues/issue-37515.stderr | 7 ++- src/test/ui/lint/dead-code/basic.stderr | 3 +- .../ui/lint/dead-code/const-and-self.stderr | 6 +- .../drop-only-field-issue-81658.stderr | 8 +-- .../lint/dead-code/empty-unused-enum.stderr | 3 +- .../field-used-in-ffi-issue-81658.stderr | 8 +-- src/test/ui/lint/dead-code/impl-trait.stderr | 7 ++- .../ui/lint/dead-code/lint-dead-code-1.stderr | 38 +++++------- .../ui/lint/dead-code/lint-dead-code-2.stderr | 9 +-- .../ui/lint/dead-code/lint-dead-code-3.stderr | 19 +++--- .../ui/lint/dead-code/lint-dead-code-4.stderr | 62 +++++++++---------- .../ui/lint/dead-code/lint-dead-code-5.stderr | 20 +++--- .../ui/lint/dead-code/lint-dead-code-6.stderr | 12 ++-- .../ui/lint/dead-code/newline-span.stderr | 9 +-- src/test/ui/lint/dead-code/type-alias.stderr | 7 ++- src/test/ui/lint/dead-code/unused-enum.stderr | 9 +-- .../dead-code/unused-struct-variant.stderr | 7 ++- .../ui/lint/dead-code/unused-variant.stderr | 3 +- .../ui/lint/dead-code/with-core-crate.stderr | 3 +- .../ui/lint/dead-code/write-only-field.stderr | 48 +++++++------- .../ui/lint/issue-17718-const-naming.stderr | 7 ++- .../ui/span/macro-span-replacement.stderr | 7 ++- .../unused-warning-point-at-identifier.stderr | 12 ++-- .../ui/test-attrs/test-warns-dead-code.stderr | 3 +- src/test/ui/union/union-fields-1.stderr | 32 +++++----- src/test/ui/union/union-lint-dead-code.stderr | 8 +-- 29 files changed, 183 insertions(+), 216 deletions(-) diff --git a/compiler/rustc_passes/src/dead.rs b/compiler/rustc_passes/src/dead.rs index 3a399afb535b2..3b21f00a001bd 100644 --- a/compiler/rustc_passes/src/dead.rs +++ b/compiler/rustc_passes/src/dead.rs @@ -16,7 +16,7 @@ use rustc_middle::middle::privacy; use rustc_middle::ty::{self, DefIdTree, TyCtxt}; use rustc_session::lint; -use rustc_span::symbol::{sym, Symbol}; +use rustc_span::symbol::{sym, Ident, Symbol}; // Any local node that may call something in its body block should be // explored. For example, if it's a live Node::Item that is a @@ -580,7 +580,7 @@ impl DeadVisitor<'tcx> { &mut self, id: hir::HirId, span: rustc_span::Span, - name: Symbol, + name: Ident, participle: &str, extra_note: Option, ) { @@ -589,7 +589,7 @@ impl DeadVisitor<'tcx> { let def_id = self.tcx.hir().local_def_id(id); let descr = self.tcx.def_kind(def_id).descr(def_id.to_def_id()); - let prefixed = vec![(span, format!("_{}", name))]; + let prefixed = vec![(name.span, format!("_{}", name))]; let mut diag = lint.build(&format!("{} is never {}: `{}`", descr, participle, name)); @@ -602,11 +602,11 @@ impl DeadVisitor<'tcx> { let mut note = format!( "the leading underscore signals that this {} serves some other \ - purpose\neven if it isn't used in a way that we can detect.", + purpose even if it isn't used in a way that we can detect.", descr, ); if matches!(extra_note, Some(ExtraNote::OtherPurposeExamples)) { - note += " (e.g. for its effect\nwhen dropped or in foreign code)"; + note += " (e.g. for its effect when dropped or in foreign code)"; } diag.note(¬e); @@ -661,7 +661,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { hir::ItemKind::Struct(..) => "constructed", // Issue #52325 _ => "used", }; - self.warn_dead_code(item.hir_id(), span, item.ident.name, participle, None); + self.warn_dead_code(item.hir_id(), span, item.ident, participle, None); } else { // Only continue if we didn't warn intravisit::walk_item(self, item); @@ -675,7 +675,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { id: hir::HirId, ) { if self.should_warn_about_variant(&variant) { - self.warn_dead_code(variant.id, variant.span, variant.ident.name, "constructed", None); + self.warn_dead_code(variant.id, variant.span, variant.ident, "constructed", None); } else { intravisit::walk_variant(self, variant, g, id); } @@ -683,7 +683,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { fn visit_foreign_item(&mut self, fi: &'tcx hir::ForeignItem<'tcx>) { if self.should_warn_about_foreign_item(fi) { - self.warn_dead_code(fi.hir_id(), fi.span, fi.ident.name, "used", None); + self.warn_dead_code(fi.hir_id(), fi.span, fi.ident, "used", None); } intravisit::walk_foreign_item(self, fi); } @@ -693,7 +693,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { self.warn_dead_code( field.hir_id, field.span, - field.ident.name, + field.ident, "read", Some(ExtraNote::OtherPurposeExamples), ); @@ -708,7 +708,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { self.warn_dead_code( impl_item.hir_id(), impl_item.span, - impl_item.ident.name, + impl_item.ident, "used", None, ); @@ -728,13 +728,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> { } else { impl_item.ident.span }; - self.warn_dead_code( - impl_item.hir_id(), - span, - impl_item.ident.name, - "used", - None, - ); + self.warn_dead_code(impl_item.hir_id(), span, impl_item.ident, "used", None); } self.visit_nested_body(body_id) } diff --git a/src/test/ui/associated-consts/associated-const-dead-code.stderr b/src/test/ui/associated-consts/associated-const-dead-code.stderr index ebd21c66a98b1..e9915ba9e96a5 100644 --- a/src/test/ui/associated-consts/associated-const-dead-code.stderr +++ b/src/test/ui/associated-consts/associated-const-dead-code.stderr @@ -2,10 +2,11 @@ error: associated constant is never used: `BAR` --> $DIR/associated-const-dead-code.rs:6:5 | LL | const BAR: u32 = 1; - | ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_BAR` + | ^^^^^^---^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_BAR` | - = note: the leading underscore signals that this associated constant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this associated constant serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/associated-const-dead-code.rs:1:9 | diff --git a/src/test/ui/derive-uninhabited-enum-38885.stderr b/src/test/ui/derive-uninhabited-enum-38885.stderr index 1583420697898..ff8fb9953fb53 100644 --- a/src/test/ui/derive-uninhabited-enum-38885.stderr +++ b/src/test/ui/derive-uninhabited-enum-38885.stderr @@ -2,10 +2,11 @@ warning: variant is never constructed: `Void` --> $DIR/derive-uninhabited-enum-38885.rs:13:5 | LL | Void(Void), - | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Void` + | ----^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Void` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. = note: `-W dead-code` implied by `-W unused` warning: 1 warning emitted diff --git a/src/test/ui/issues/issue-37515.stderr b/src/test/ui/issues/issue-37515.stderr index 70bb990445236..3223554a5b778 100644 --- a/src/test/ui/issues/issue-37515.stderr +++ b/src/test/ui/issues/issue-37515.stderr @@ -2,10 +2,11 @@ warning: type alias is never used: `Z` --> $DIR/issue-37515.rs:5:1 | LL | type Z = dyn for<'x> Send; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Z` + | ^^^^^-^^^^^^^^^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Z` | - = note: the leading underscore signals that this type alias serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this type alias serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/issue-37515.rs:3:9 | diff --git a/src/test/ui/lint/dead-code/basic.stderr b/src/test/ui/lint/dead-code/basic.stderr index 40a1b69dc2fc7..8264d0736e03e 100644 --- a/src/test/ui/lint/dead-code/basic.stderr +++ b/src/test/ui/lint/dead-code/basic.stderr @@ -4,8 +4,7 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/basic.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/const-and-self.stderr b/src/test/ui/lint/dead-code/const-and-self.stderr index b22fed0e537c1..e7233f386cc68 100644 --- a/src/test/ui/lint/dead-code/const-and-self.stderr +++ b/src/test/ui/lint/dead-code/const-and-self.stderr @@ -4,8 +4,7 @@ warning: variant is never constructed: `B` LL | B, | ^ help: if this is intentional, prefix it with an underscore: `_B` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/const-and-self.rs:3:9 | @@ -18,8 +17,7 @@ warning: variant is never constructed: `C` LL | C, | ^ help: if this is intentional, prefix it with an underscore: `_C` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. warning: 2 warnings emitted diff --git a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr index 4418d8d5d3033..f379a0941166f 100644 --- a/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/drop-only-field-issue-81658.stderr @@ -2,11 +2,11 @@ error: field is never read: `guard` --> $DIR/drop-only-field-issue-81658.rs:15:5 | LL | guard: MutexGuard<'a, T>, - | ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_guard` + | -----^^^^^^^^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_guard` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) note: the lint level is defined here --> $DIR/drop-only-field-issue-81658.rs:8:9 | diff --git a/src/test/ui/lint/dead-code/empty-unused-enum.stderr b/src/test/ui/lint/dead-code/empty-unused-enum.stderr index bd62e9a984b1a..5c06cd5a6a0b2 100644 --- a/src/test/ui/lint/dead-code/empty-unused-enum.stderr +++ b/src/test/ui/lint/dead-code/empty-unused-enum.stderr @@ -4,8 +4,7 @@ error: enum is never used: `E` LL | enum E {} | ^ help: if this is intentional, prefix it with an underscore: `_E` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/empty-unused-enum.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr index fab196a267517..d6a247d98e292 100644 --- a/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr +++ b/src/test/ui/lint/dead-code/field-used-in-ffi-issue-81658.stderr @@ -2,11 +2,11 @@ error: field is never read: `items` --> $DIR/field-used-in-ffi-issue-81658.rs:13:5 | LL | items: Option>, - | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_items` + | -----^^^^^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_items` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) note: the lint level is defined here --> $DIR/field-used-in-ffi-issue-81658.rs:7:9 | diff --git a/src/test/ui/lint/dead-code/impl-trait.stderr b/src/test/ui/lint/dead-code/impl-trait.stderr index cca84602ba857..fb18eb2819f76 100644 --- a/src/test/ui/lint/dead-code/impl-trait.stderr +++ b/src/test/ui/lint/dead-code/impl-trait.stderr @@ -2,10 +2,11 @@ error: type alias is never used: `Unused` --> $DIR/impl-trait.rs:12:1 | LL | type Unused = (); - | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` + | ^^^^^------^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Unused` | - = note: the leading underscore signals that this type alias serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this type alias serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/impl-trait.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr index 7ddc89c995760..15448448e1169 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-1.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-1.stderr @@ -4,8 +4,7 @@ error: struct is never constructed: `Bar` LL | pub struct Bar; | ^^^ help: if this is intentional, prefix it with an underscore: `_Bar` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-1.rs:5:9 | @@ -16,19 +15,21 @@ error: static is never used: `priv_static` --> $DIR/lint-dead-code-1.rs:20:1 | LL | static priv_static: isize = 0; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_static` + | ^^^^^^^-----------^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_priv_static` | - = note: the leading underscore signals that this static serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this static serves some other purpose even if it isn't used in a way that we can detect. error: constant is never used: `priv_const` --> $DIR/lint-dead-code-1.rs:27:1 | LL | const priv_const: isize = 0; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_const` + | ^^^^^^----------^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_priv_const` | - = note: the leading underscore signals that this constant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this constant serves some other purpose even if it isn't used in a way that we can detect. error: struct is never constructed: `PrivStruct` --> $DIR/lint-dead-code-1.rs:35:8 @@ -36,8 +37,7 @@ error: struct is never constructed: `PrivStruct` LL | struct PrivStruct; | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_PrivStruct` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. error: enum is never used: `priv_enum` --> $DIR/lint-dead-code-1.rs:64:6 @@ -45,8 +45,7 @@ error: enum is never used: `priv_enum` LL | enum priv_enum { foo2, bar2 } | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_enum` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. error: variant is never constructed: `bar3` --> $DIR/lint-dead-code-1.rs:67:5 @@ -54,8 +53,7 @@ error: variant is never constructed: `bar3` LL | bar3 | ^^^^ help: if this is intentional, prefix it with an underscore: `_bar3` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `priv_fn` --> $DIR/lint-dead-code-1.rs:88:4 @@ -63,8 +61,7 @@ error: function is never used: `priv_fn` LL | fn priv_fn() { | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_priv_fn` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `foo` --> $DIR/lint-dead-code-1.rs:93:4 @@ -72,8 +69,7 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `bar` --> $DIR/lint-dead-code-1.rs:98:4 @@ -81,8 +77,7 @@ error: function is never used: `bar` LL | fn bar() { | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `baz` --> $DIR/lint-dead-code-1.rs:102:4 @@ -90,8 +85,7 @@ error: function is never used: `baz` LL | fn baz() -> impl Copy { | ^^^ help: if this is intentional, prefix it with an underscore: `_baz` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr index dce763c5ed61f..5e19c7d02ffd3 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-2.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-2.stderr @@ -4,8 +4,7 @@ error: function is never used: `dead_fn` LL | fn dead_fn() {} | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-2.rs:2:9 | @@ -18,8 +17,7 @@ error: function is never used: `dead_fn2` LL | fn dead_fn2() {} | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dead_fn2` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `main` --> $DIR/lint-dead-code-2.rs:38:4 @@ -27,8 +25,7 @@ error: function is never used: `main` LL | fn main() { | ^^^^ help: if this is intentional, prefix it with an underscore: `_main` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr index a5ecc91edb060..d32fde5872d99 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-3.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-3.stderr @@ -4,8 +4,7 @@ error: struct is never constructed: `Foo` LL | struct Foo; | ^^^ help: if this is intentional, prefix it with an underscore: `_Foo` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-3.rs:4:9 | @@ -18,8 +17,7 @@ error: associated function is never used: `foo` LL | fn foo(&self) { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore signals that this associated function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this associated function serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `bar` --> $DIR/lint-dead-code-3.rs:21:4 @@ -27,8 +25,7 @@ error: function is never used: `bar` LL | fn bar() { | ^^^ help: if this is intentional, prefix it with an underscore: `_bar` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: enum is never used: `c_void` --> $DIR/lint-dead-code-3.rs:60:6 @@ -36,17 +33,17 @@ error: enum is never used: `c_void` LL | enum c_void {} | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c_void` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `free` --> $DIR/lint-dead-code-3.rs:62:5 | LL | fn free(p: *const c_void); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_free` + | ^^^----^^^^^^^^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_free` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 5 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr index 2297c172fc987..2785faa29f5d9 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-4.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-4.stderr @@ -2,11 +2,11 @@ error: field is never read: `b` --> $DIR/lint-dead-code-4.rs:7:5 | LL | b: bool, - | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` + | -^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_b` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) note: the lint level is defined here --> $DIR/lint-dead-code-4.rs:3:9 | @@ -19,21 +19,22 @@ error: variant is never constructed: `X` LL | X, | ^ help: if this is intentional, prefix it with an underscore: `_X` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: variant is never constructed: `Y` --> $DIR/lint-dead-code-4.rs:16:5 | -LL | / Y { +LL | Y { + | ^ help: if this is intentional, prefix it with an underscore: `_Y` + | _____| + | | LL | | a: String, LL | | b: i32, LL | | c: i32, LL | | }, - | |_____^ help: if this is intentional, prefix it with an underscore: `_Y` + | |_____^ | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: enum is never used: `ABC` --> $DIR/lint-dead-code-4.rs:24:6 @@ -41,8 +42,7 @@ error: enum is never used: `ABC` LL | enum ABC { | ^^^ help: if this is intentional, prefix it with an underscore: `_ABC` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. error: variant is never constructed: `I` --> $DIR/lint-dead-code-4.rs:36:5 @@ -50,28 +50,27 @@ error: variant is never constructed: `I` LL | I, | ^ help: if this is intentional, prefix it with an underscore: `_I` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: field is never read: `b` --> $DIR/lint-dead-code-4.rs:39:9 | LL | b: i32, - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` + | -^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_b` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:40:9 | LL | c: i32, - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | -^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: variant is never constructed: `K` --> $DIR/lint-dead-code-4.rs:42:5 @@ -79,28 +78,27 @@ error: variant is never constructed: `K` LL | K | ^ help: if this is intentional, prefix it with an underscore: `_K` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: field is never read: `x` --> $DIR/lint-dead-code-4.rs:61:5 | LL | x: usize, - | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_x` + | -^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_x` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `c` --> $DIR/lint-dead-code-4.rs:63:5 | LL | c: bool, - | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | -^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: aborting due to 10 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr index afe159c2d8bba..6375d98d35cb2 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-5.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-5.stderr @@ -4,8 +4,7 @@ error: variant is never constructed: `Variant2` LL | Variant2 | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant2` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-5.rs:2:9 | @@ -16,19 +15,21 @@ error: variant is never constructed: `Variant5` --> $DIR/lint-dead-code-5.rs:13:5 | LL | Variant5 { _x: isize }, - | ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant5` + | --------^^^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Variant5` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: variant is never constructed: `Variant6` --> $DIR/lint-dead-code-5.rs:14:5 | LL | Variant6(isize), - | ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant6` + | --------^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Variant6` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. error: enum is never used: `Enum3` --> $DIR/lint-dead-code-5.rs:35:6 @@ -36,8 +37,7 @@ error: enum is never used: `Enum3` LL | enum Enum3 { | ^^^^^ help: if this is intentional, prefix it with an underscore: `_Enum3` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr index d212a4bc443d9..ef26fe54ab589 100644 --- a/src/test/ui/lint/dead-code/lint-dead-code-6.stderr +++ b/src/test/ui/lint/dead-code/lint-dead-code-6.stderr @@ -4,8 +4,7 @@ error: struct is never constructed: `UnusedStruct` LL | struct UnusedStruct; | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_UnusedStruct` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/lint-dead-code-6.rs:1:9 | @@ -18,8 +17,7 @@ error: associated function is never used: `unused_impl_fn_1` LL | fn unused_impl_fn_1() { | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_1` | - = note: the leading underscore signals that this associated function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this associated function serves some other purpose even if it isn't used in a way that we can detect. error: associated function is never used: `unused_impl_fn_2` --> $DIR/lint-dead-code-6.rs:9:8 @@ -27,8 +25,7 @@ error: associated function is never used: `unused_impl_fn_2` LL | fn unused_impl_fn_2(var: i32) { | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_2` | - = note: the leading underscore signals that this associated function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this associated function serves some other purpose even if it isn't used in a way that we can detect. error: associated function is never used: `unused_impl_fn_3` --> $DIR/lint-dead-code-6.rs:13:8 @@ -36,8 +33,7 @@ error: associated function is never used: `unused_impl_fn_3` LL | fn unused_impl_fn_3( | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_impl_fn_3` | - = note: the leading underscore signals that this associated function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this associated function serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 4 previous errors diff --git a/src/test/ui/lint/dead-code/newline-span.stderr b/src/test/ui/lint/dead-code/newline-span.stderr index b57df1dfcedb4..5bd566be35e01 100644 --- a/src/test/ui/lint/dead-code/newline-span.stderr +++ b/src/test/ui/lint/dead-code/newline-span.stderr @@ -4,8 +4,7 @@ error: function is never used: `unused` LL | fn unused() { | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/newline-span.rs:1:9 | @@ -18,8 +17,7 @@ error: function is never used: `unused2` LL | fn unused2(var: i32) { | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused2` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: function is never used: `unused3` --> $DIR/newline-span.rs:11:4 @@ -27,8 +25,7 @@ error: function is never used: `unused3` LL | fn unused3( | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused3` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/type-alias.stderr b/src/test/ui/lint/dead-code/type-alias.stderr index 3e7298a6f2d3e..1e7a030de3aa7 100644 --- a/src/test/ui/lint/dead-code/type-alias.stderr +++ b/src/test/ui/lint/dead-code/type-alias.stderr @@ -2,10 +2,11 @@ error: type alias is never used: `Unused` --> $DIR/type-alias.rs:4:1 | LL | type Unused = u8; - | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Unused` + | ^^^^^------^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Unused` | - = note: the leading underscore signals that this type alias serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this type alias serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/type-alias.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-enum.stderr b/src/test/ui/lint/dead-code/unused-enum.stderr index 6e65e6565076f..d536479c800ae 100644 --- a/src/test/ui/lint/dead-code/unused-enum.stderr +++ b/src/test/ui/lint/dead-code/unused-enum.stderr @@ -4,8 +4,7 @@ error: struct is never constructed: `F` LL | struct F; | ^ help: if this is intentional, prefix it with an underscore: `_F` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-enum.rs:1:9 | @@ -19,8 +18,7 @@ error: struct is never constructed: `B` LL | struct B; | ^ help: if this is intentional, prefix it with an underscore: `_B` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. error: enum is never used: `E` --> $DIR/unused-enum.rs:6:6 @@ -28,8 +26,7 @@ error: enum is never used: `E` LL | enum E { | ^ help: if this is intentional, prefix it with an underscore: `_E` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. error: aborting due to 3 previous errors diff --git a/src/test/ui/lint/dead-code/unused-struct-variant.stderr b/src/test/ui/lint/dead-code/unused-struct-variant.stderr index a5c7eea0579e6..394ced3e81001 100644 --- a/src/test/ui/lint/dead-code/unused-struct-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-struct-variant.stderr @@ -2,10 +2,11 @@ error: variant is never constructed: `Bar` --> $DIR/unused-struct-variant.rs:8:5 | LL | Bar(B), - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Bar` + | ---^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_Bar` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-struct-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/unused-variant.stderr b/src/test/ui/lint/dead-code/unused-variant.stderr index 9536c492fc04f..7dcb79d0490c1 100644 --- a/src/test/ui/lint/dead-code/unused-variant.stderr +++ b/src/test/ui/lint/dead-code/unused-variant.stderr @@ -4,8 +4,7 @@ error: variant is never constructed: `Variant1` LL | Variant1, | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Variant1` | - = note: the leading underscore signals that this variant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this variant serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-variant.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/with-core-crate.stderr b/src/test/ui/lint/dead-code/with-core-crate.stderr index 563b0b65020ee..1bde434069ee7 100644 --- a/src/test/ui/lint/dead-code/with-core-crate.stderr +++ b/src/test/ui/lint/dead-code/with-core-crate.stderr @@ -4,8 +4,7 @@ error: function is never used: `foo` LL | fn foo() { | ^^^ help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/with-core-crate.rs:1:9 | diff --git a/src/test/ui/lint/dead-code/write-only-field.stderr b/src/test/ui/lint/dead-code/write-only-field.stderr index f750beade18ec..13a21bb1193de 100644 --- a/src/test/ui/lint/dead-code/write-only-field.stderr +++ b/src/test/ui/lint/dead-code/write-only-field.stderr @@ -2,11 +2,11 @@ error: field is never read: `f` --> $DIR/write-only-field.rs:4:5 | LL | f: i32, - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` + | -^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_f` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) note: the lint level is defined here --> $DIR/write-only-field.rs:1:9 | @@ -17,51 +17,51 @@ error: field is never read: `sub` --> $DIR/write-only-field.rs:5:5 | LL | sub: Sub, - | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub` + | ---^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_sub` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `f` --> $DIR/write-only-field.rs:9:5 | LL | f: i32, - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_f` + | -^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_f` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `y` --> $DIR/write-only-field.rs:28:9 | LL | y: bool, - | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y` + | -^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_y` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `u` --> $DIR/write-only-field.rs:58:9 | LL | u: u32, - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_u` + | -^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_u` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `v` --> $DIR/write-only-field.rs:59:9 | LL | v: u32, - | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v` + | -^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_v` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: aborting due to 6 previous errors diff --git a/src/test/ui/lint/issue-17718-const-naming.stderr b/src/test/ui/lint/issue-17718-const-naming.stderr index 0bafca2e4d785..e880006e114c1 100644 --- a/src/test/ui/lint/issue-17718-const-naming.stderr +++ b/src/test/ui/lint/issue-17718-const-naming.stderr @@ -2,10 +2,11 @@ error: constant is never used: `foo` --> $DIR/issue-17718-const-naming.rs:4:1 | LL | const foo: isize = 3; - | ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_foo` + | ^^^^^^---^^^^^^^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_foo` | - = note: the leading underscore signals that this constant serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this constant serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/issue-17718-const-naming.rs:2:9 | diff --git a/src/test/ui/span/macro-span-replacement.stderr b/src/test/ui/span/macro-span-replacement.stderr index d5fad7c3b88ec..f94a9e30a3dfa 100644 --- a/src/test/ui/span/macro-span-replacement.stderr +++ b/src/test/ui/span/macro-span-replacement.stderr @@ -2,13 +2,14 @@ warning: struct is never constructed: `S` --> $DIR/macro-span-replacement.rs:7:14 | LL | $b $a; - | ^ help: if this is intentional, prefix it with an underscore: `_S` + | --^ + | | + | help: if this is intentional, prefix it with an underscore: `_S` ... LL | m!(S struct); | ------------- in this macro invocation | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/macro-span-replacement.rs:3:9 | diff --git a/src/test/ui/span/unused-warning-point-at-identifier.stderr b/src/test/ui/span/unused-warning-point-at-identifier.stderr index 0bf85d252d60c..3bf342f197252 100644 --- a/src/test/ui/span/unused-warning-point-at-identifier.stderr +++ b/src/test/ui/span/unused-warning-point-at-identifier.stderr @@ -4,8 +4,7 @@ warning: enum is never used: `Enum` LL | enum Enum { | ^^^^ help: if this is intentional, prefix it with an underscore: `_Enum` | - = note: the leading underscore signals that this enum serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this enum serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/unused-warning-point-at-identifier.rs:3:9 | @@ -19,8 +18,7 @@ warning: struct is never constructed: `Struct` LL | struct Struct { | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_Struct` | - = note: the leading underscore signals that this struct serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this struct serves some other purpose even if it isn't used in a way that we can detect. warning: function is never used: `func` --> $DIR/unused-warning-point-at-identifier.rs:19:4 @@ -28,8 +26,7 @@ warning: function is never used: `func` LL | fn func() -> usize { | ^^^^ help: if this is intentional, prefix it with an underscore: `_func` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. warning: function is never used: `func_complete_span` --> $DIR/unused-warning-point-at-identifier.rs:24:1 @@ -37,8 +34,7 @@ warning: function is never used: `func_complete_span` LL | func_complete_span() | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func_complete_span` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. warning: 4 warnings emitted diff --git a/src/test/ui/test-attrs/test-warns-dead-code.stderr b/src/test/ui/test-attrs/test-warns-dead-code.stderr index 795a9fb8820ce..e5a8dee6ccb68 100644 --- a/src/test/ui/test-attrs/test-warns-dead-code.stderr +++ b/src/test/ui/test-attrs/test-warns-dead-code.stderr @@ -4,8 +4,7 @@ error: function is never used: `dead` LL | fn dead() {} | ^^^^ help: if this is intentional, prefix it with an underscore: `_dead` | - = note: the leading underscore signals that this function serves some other purpose - even if it isn't used in a way that we can detect. + = note: the leading underscore signals that this function serves some other purpose even if it isn't used in a way that we can detect. note: the lint level is defined here --> $DIR/test-warns-dead-code.rs:3:9 | diff --git a/src/test/ui/union/union-fields-1.stderr b/src/test/ui/union/union-fields-1.stderr index e1695ca12cf72..3595bf6dce688 100644 --- a/src/test/ui/union/union-fields-1.stderr +++ b/src/test/ui/union/union-fields-1.stderr @@ -2,11 +2,11 @@ error: field is never read: `c` --> $DIR/union-fields-1.rs:6:5 | LL | c: u8, - | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | -^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) note: the lint level is defined here --> $DIR/union-fields-1.rs:1:9 | @@ -17,31 +17,31 @@ error: field is never read: `a` --> $DIR/union-fields-1.rs:9:5 | LL | a: u8, - | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` + | -^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_a` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `a` --> $DIR/union-fields-1.rs:13:20 | LL | union NoDropLike { a: u8 } - | ^^^^^ help: if this is intentional, prefix it with an underscore: `_a` + | -^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_a` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: field is never read: `c` --> $DIR/union-fields-1.rs:18:5 | LL | c: u8, - | ^^^^^ help: if this is intentional, prefix it with an underscore: `_c` + | -^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_c` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) error: aborting due to 4 previous errors diff --git a/src/test/ui/union/union-lint-dead-code.stderr b/src/test/ui/union/union-lint-dead-code.stderr index 565e13fb2ae1f..8ead9cde9b333 100644 --- a/src/test/ui/union/union-lint-dead-code.stderr +++ b/src/test/ui/union/union-lint-dead-code.stderr @@ -2,11 +2,11 @@ error: field is never read: `b` --> $DIR/union-lint-dead-code.rs:5:5 | LL | b: bool, - | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_b` + | -^^^^^^ + | | + | help: if this is intentional, prefix it with an underscore: `_b` | - = note: the leading underscore signals that this field serves some other purpose - even if it isn't used in a way that we can detect. (e.g. for its effect - when dropped or in foreign code) + = note: the leading underscore signals that this field serves some other purpose even if it isn't used in a way that we can detect. (e.g. for its effect when dropped or in foreign code) note: the lint level is defined here --> $DIR/union-lint-dead-code.rs:1:9 |