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Stabilize #[track_caller].
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Does not yet make its constness stable, though. Use of
`Location::caller` in const contexts is still gated by
`#![feature(const_caller_location)]`.
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anp committed Jun 30, 2020
1 parent e070765 commit 8afebc0
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Showing 38 changed files with 36 additions and 99 deletions.
5 changes: 0 additions & 5 deletions src/doc/unstable-book/src/language-features/track-caller.md

This file was deleted.

2 changes: 1 addition & 1 deletion src/libcore/lib.rs
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Expand Up @@ -118,7 +118,7 @@
#![feature(staged_api)]
#![feature(std_internals)]
#![feature(stmt_expr_attributes)]
#![feature(track_caller)]
#![cfg_attr(bootstrap, feature(track_caller))]
#![feature(transparent_unions)]
#![feature(unboxed_closures)]
#![feature(unsized_locals)]
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2 changes: 1 addition & 1 deletion src/libcore/macros/mod.rs
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@@ -1,6 +1,6 @@
#[doc(include = "panic.md")]
#[macro_export]
#[allow_internal_unstable(core_panic, track_caller)]
#[allow_internal_unstable(core_panic, const_caller_location)]
#[stable(feature = "core", since = "1.6.0")]
macro_rules! panic {
() => (
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14 changes: 4 additions & 10 deletions src/libcore/panic.rs
Original file line number Diff line number Diff line change
Expand Up @@ -190,7 +190,6 @@ impl<'a> Location<'a> {
/// # Examples
///
/// ```
/// #![feature(track_caller)]
/// use core::panic::Location;
///
/// /// Returns the [`Location`] at which it is called.
Expand All @@ -206,7 +205,7 @@ impl<'a> Location<'a> {
///
/// let fixed_location = get_just_one_location();
/// assert_eq!(fixed_location.file(), file!());
/// assert_eq!(fixed_location.line(), 15);
/// assert_eq!(fixed_location.line(), 14);
/// assert_eq!(fixed_location.column(), 5);
///
/// // running the same untracked function in a different location gives us the same result
Expand All @@ -217,7 +216,7 @@ impl<'a> Location<'a> {
///
/// let this_location = get_caller_location();
/// assert_eq!(this_location.file(), file!());
/// assert_eq!(this_location.line(), 29);
/// assert_eq!(this_location.line(), 28);
/// assert_eq!(this_location.column(), 21);
///
/// // running the tracked function in a different location produces a different value
Expand All @@ -226,13 +225,8 @@ impl<'a> Location<'a> {
/// assert_ne!(this_location.line(), another_location.line());
/// assert_ne!(this_location.column(), another_location.column());
/// ```
// FIXME: When stabilizing this method, please also update the documentation
// of `intrinsics::caller_location`.
#[unstable(
feature = "track_caller",
reason = "uses #[track_caller] which is not yet stable",
issue = "47809"
)]
#[stable(feature = "track_caller", since = "1.46.0")]
#[rustc_const_unstable(feature = "const_caller_location", issue = "47809")]
#[track_caller]
pub const fn caller() -> &'static Location<'static> {
crate::intrinsics::caller_location()
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2 changes: 0 additions & 2 deletions src/librustc_error_codes/error_codes/E0736.md
Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,6 @@
Erroneous code example:

```compile_fail,E0736
#![feature(track_caller)]
#[naked]
#[track_caller]
fn foo() {}
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2 changes: 0 additions & 2 deletions src/librustc_error_codes/error_codes/E0737.md
Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,6 @@ restrictions.
Erroneous code example:

```compile_fail,E0737
#![feature(track_caller)]
#[track_caller]
extern "C" fn foo() {}
```
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1 change: 0 additions & 1 deletion src/librustc_error_codes/error_codes/E0739.md
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@
Erroneous code example:

```compile_fail,E0739
#![feature(track_caller)]
#[track_caller]
struct Bar {
a: u8,
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2 changes: 1 addition & 1 deletion src/librustc_errors/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
#![feature(crate_visibility_modifier)]
#![feature(nll)]
#![feature(track_caller)]
#![cfg_attr(bootstrap, feature(track_caller))]

pub use emitter::ColorConfig;

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3 changes: 3 additions & 0 deletions src/librustc_feature/accepted.rs
Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,9 @@ declare_features! (
(accepted, const_if_match, "1.45.0", Some(49146), None),
/// Allows the use of `loop` and `while` in constants.
(accepted, const_loop, "1.45.0", Some(52000), None),
/// Allows `#[track_caller]` to be used which provides
/// accurate caller location reporting during panic (RFC 2091).
(accepted, track_caller, "1.46.0", Some(47809), None),

// -------------------------------------------------------------------------
// feature-group-end: accepted features
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4 changes: 0 additions & 4 deletions src/librustc_feature/active.rs
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Expand Up @@ -494,10 +494,6 @@ declare_features! (
/// Allows the use of raw-dylibs (RFC 2627).
(active, raw_dylib, "1.40.0", Some(58713), None),

/// Allows `#[track_caller]` to be used which provides
/// accurate caller location reporting during panic (RFC 2091).
(active, track_caller, "1.40.0", Some(47809), None),

/// Allows making `dyn Trait` well-formed even if `Trait` is not object safe.
/// In that case, `dyn Trait: Trait` does not hold. Moreover, coercions and
/// casts in safe Rust to `dyn Trait` for such a `Trait` is also forbidden.
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2 changes: 1 addition & 1 deletion src/librustc_feature/builtin_attrs.rs
Original file line number Diff line number Diff line change
Expand Up @@ -260,6 +260,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
ungated!(cold, Whitelisted, template!(Word)),
ungated!(no_builtins, Whitelisted, template!(Word)),
ungated!(target_feature, Whitelisted, template!(List: r#"enable = "name""#)),
ungated!(track_caller, Whitelisted, template!(Word)),
gated!(
no_sanitize, Whitelisted,
template!(List: "address, memory, thread"),
Expand Down Expand Up @@ -333,7 +334,6 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
gated!(ffi_returns_twice, Whitelisted, template!(Word), experimental!(ffi_returns_twice)),
gated!(ffi_pure, Whitelisted, template!(Word), experimental!(ffi_pure)),
gated!(ffi_const, Whitelisted, template!(Word), experimental!(ffi_const)),
gated!(track_caller, Whitelisted, template!(Word), experimental!(track_caller)),
gated!(
register_attr, CrateLevel, template!(List: "attr1, attr2, ..."),
experimental!(register_attr),
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2 changes: 1 addition & 1 deletion src/librustc_middle/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@
#![feature(or_patterns)]
#![feature(range_is_empty)]
#![feature(min_specialization)]
#![feature(track_caller)]
#![cfg_attr(bootstrap, feature(track_caller))]
#![feature(trusted_len)]
#![feature(stmt_expr_attributes)]
#![feature(test)]
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2 changes: 1 addition & 1 deletion src/libstd/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -316,7 +316,7 @@
#![feature(toowned_clone_into)]
#![feature(total_cmp)]
#![feature(trace_macros)]
#![feature(track_caller)]
#![cfg_attr(bootstrap, feature(track_caller))]
#![feature(try_reserve)]
#![feature(unboxed_closures)]
#![feature(untagged_unions)]
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2 changes: 1 addition & 1 deletion src/test/ui/asm/sym.rs
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
// only-linux
// run-pass

#![feature(asm, track_caller, thread_local)]
#![feature(asm, thread_local)]

extern "C" fn f1() -> i32 {
111
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5 changes: 0 additions & 5 deletions src/test/ui/feature-gates/feature-gate-track_caller.rs

This file was deleted.

12 changes: 0 additions & 12 deletions src/test/ui/feature-gates/feature-gate-track_caller.stderr

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2 changes: 0 additions & 2 deletions src/test/ui/macros/issue-68060.rs
Original file line number Diff line number Diff line change
@@ -1,5 +1,3 @@
#![feature(track_caller)]

fn main() {
(0..)
.map(
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6 changes: 3 additions & 3 deletions src/test/ui/macros/issue-68060.stderr
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
error[E0658]: `#[target_feature(..)]` can only be applied to `unsafe` functions
--> $DIR/issue-68060.rs:6:13
--> $DIR/issue-68060.rs:4:13
|
LL | #[target_feature(enable = "")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Expand All @@ -11,13 +11,13 @@ LL | |_| (),
= help: add `#![feature(target_feature_11)]` to the crate attributes to enable

error: the feature named `` is not valid for this target
--> $DIR/issue-68060.rs:6:30
--> $DIR/issue-68060.rs:4:30
|
LL | #[target_feature(enable = "")]
| ^^^^^^^^^^^ `` is not valid for this target

error[E0737]: `#[track_caller]` requires Rust ABI
--> $DIR/issue-68060.rs:9:13
--> $DIR/issue-68060.rs:7:13
|
LL | #[track_caller]
| ^^^^^^^^^^^^^^^
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1 change: 0 additions & 1 deletion src/test/ui/numbers-arithmetic/saturating-float-casts.rs
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,6 @@
// merged.

#![feature(test, stmt_expr_attributes)]
#![feature(track_caller)]
#![deny(overflowing_literals)]
extern crate test;

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2 changes: 0 additions & 2 deletions src/test/ui/rfc-2091-track-caller/call-chain.rs
Original file line number Diff line number Diff line change
@@ -1,7 +1,5 @@
// run-pass

#![feature(track_caller)]

use std::panic::Location;

struct Foo;
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
// run-pass
// compile-flags: -Z unleash-the-miri-inside-of-you

#![feature(core_intrinsics, const_caller_location, track_caller, const_fn)]
#![feature(core_intrinsics, const_caller_location, const_fn)]

type L = &'static std::panic::Location<'static>;

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Original file line number Diff line number Diff line change
@@ -1,7 +1,5 @@
// run-pass

#![feature(track_caller)]

#[inline(never)]
#[track_caller]
fn codegen_caller_loc() -> &'static core::panic::Location<'static> {
Expand All @@ -15,13 +13,13 @@ macro_rules! caller_location_from_macro {
fn main() {
let loc = codegen_caller_loc();
assert_eq!(loc.file(), file!());
assert_eq!(loc.line(), 16);
assert_eq!(loc.line(), 14);
assert_eq!(loc.column(), 15);

// `Location::caller()` in a macro should behave similarly to `file!` and `line!`,
// i.e. point to where the macro was invoked, instead of the macro itself.
let loc2 = caller_location_from_macro!();
assert_eq!(loc2.file(), file!());
assert_eq!(loc2.line(), 23);
assert_eq!(loc2.line(), 21);
assert_eq!(loc2.column(), 16);
}
2 changes: 1 addition & 1 deletion src/test/ui/rfc-2091-track-caller/const-caller-location.rs
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
// run-pass

#![feature(const_fn, track_caller)]
#![feature(const_caller_location, const_fn)]

use std::panic::Location;

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Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,6 @@
//! we don't inspect the location returned -- it would be difficult to distinguish between the
//! explicit panic and a failed assertion. That it compiles and runs is enough for this one.
#![feature(track_caller)]

#[track_caller]
fn doesnt_return() -> ! {
let _location = core::panic::Location::caller();
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2 changes: 0 additions & 2 deletions src/test/ui/rfc-2091-track-caller/error-odd-syntax.rs
Original file line number Diff line number Diff line change
@@ -1,5 +1,3 @@
#![feature(track_caller)]

#[track_caller(1)]
fn f() {}
//~^^ ERROR malformed `track_caller` attribute input
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2 changes: 1 addition & 1 deletion src/test/ui/rfc-2091-track-caller/error-odd-syntax.stderr
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
error: malformed `track_caller` attribute input
--> $DIR/error-odd-syntax.rs:3:1
--> $DIR/error-odd-syntax.rs:1:1
|
LL | #[track_caller(1)]
| ^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[track_caller]`
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2 changes: 0 additions & 2 deletions src/test/ui/rfc-2091-track-caller/error-with-invalid-abi.rs
Original file line number Diff line number Diff line change
@@ -1,5 +1,3 @@
#![feature(track_caller)]

#[track_caller]
extern "C" fn f() {}
//~^^ ERROR `#[track_caller]` requires Rust ABI
Expand Down
Original file line number Diff line number Diff line change
@@ -1,11 +1,11 @@
error[E0737]: `#[track_caller]` requires Rust ABI
--> $DIR/error-with-invalid-abi.rs:3:1
--> $DIR/error-with-invalid-abi.rs:1:1
|
LL | #[track_caller]
| ^^^^^^^^^^^^^^^

error[E0737]: `#[track_caller]` requires Rust ABI
--> $DIR/error-with-invalid-abi.rs:8:5
--> $DIR/error-with-invalid-abi.rs:6:5
|
LL | #[track_caller]
| ^^^^^^^^^^^^^^^
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2 changes: 1 addition & 1 deletion src/test/ui/rfc-2091-track-caller/error-with-naked.rs
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
#![feature(naked_functions, track_caller)]
#![feature(naked_functions)]

#[track_caller] //~ ERROR cannot use `#[track_caller]` with `#[naked]`
#[naked]
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6 changes: 2 additions & 4 deletions src/test/ui/rfc-2091-track-caller/intrinsic-wrapper.rs
Original file line number Diff line number Diff line change
@@ -1,21 +1,19 @@
// run-pass

#![feature(track_caller)]

macro_rules! caller_location_from_macro {
() => (core::panic::Location::caller());
}

fn main() {
let loc = core::panic::Location::caller();
assert_eq!(loc.file(), file!());
assert_eq!(loc.line(), 10);
assert_eq!(loc.line(), 8);
assert_eq!(loc.column(), 15);

// `Location::caller()` in a macro should behave similarly to `file!` and `line!`,
// i.e. point to where the macro was invoked, instead of the macro itself.
let loc2 = caller_location_from_macro!();
assert_eq!(loc2.file(), file!());
assert_eq!(loc2.line(), 17);
assert_eq!(loc2.line(), 15);
assert_eq!(loc2.column(), 16);
}
2 changes: 0 additions & 2 deletions src/test/ui/rfc-2091-track-caller/only-for-fns.rs
Original file line number Diff line number Diff line change
@@ -1,5 +1,3 @@
#![feature(track_caller)]

#[track_caller]
struct S;
//~^^ ERROR attribute should be applied to function
Expand Down
2 changes: 1 addition & 1 deletion src/test/ui/rfc-2091-track-caller/only-for-fns.stderr
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
error[E0739]: attribute should be applied to function
--> $DIR/only-for-fns.rs:3:1
--> $DIR/only-for-fns.rs:1:1
|
LL | #[track_caller]
| ^^^^^^^^^^^^^^^
Expand Down
2 changes: 0 additions & 2 deletions src/test/ui/rfc-2091-track-caller/pass.rs
Original file line number Diff line number Diff line change
@@ -1,6 +1,4 @@
// run-pass
#![feature(track_caller)]

#[track_caller]
fn f() {}

Expand Down
10 changes: 4 additions & 6 deletions src/test/ui/rfc-2091-track-caller/track-caller-attribute.rs
Original file line number Diff line number Diff line change
@@ -1,7 +1,5 @@
// run-pass

#![feature(track_caller)]

use std::panic::Location;

#[track_caller]
Expand All @@ -20,21 +18,21 @@ fn nested_tracked() -> &'static Location<'static> {
fn main() {
let location = Location::caller();
assert_eq!(location.file(), file!());
assert_eq!(location.line(), 21);
assert_eq!(location.line(), 19);
assert_eq!(location.column(), 20);

let tracked = tracked();
assert_eq!(tracked.file(), file!());
assert_eq!(tracked.line(), 26);
assert_eq!(tracked.line(), 24);
assert_eq!(tracked.column(), 19);

let nested = nested_intrinsic();
assert_eq!(nested.file(), file!());
assert_eq!(nested.line(), 13);
assert_eq!(nested.line(), 11);
assert_eq!(nested.column(), 5);

let contained = nested_tracked();
assert_eq!(contained.file(), file!());
assert_eq!(contained.line(), 17);
assert_eq!(contained.line(), 15);
assert_eq!(contained.column(), 5);
}
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