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Move lint levels machanism in librustc_lint.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| use rustc::hir; | ||
| use rustc::hir::def_id::{CrateNum, LOCAL_CRATE}; | ||
| use rustc::hir::intravisit; | ||
| use rustc::lint::{LintLevelMap, LintLevelSets, LintLevelsBuilder, LintStore}; | ||
| use rustc::ty::query::Providers; | ||
| use rustc::ty::TyCtxt; | ||
| use syntax::ast; | ||
|
|
||
| pub use rustc_session::lint::{FutureIncompatibleInfo, Level, Lint, LintId}; | ||
|
|
||
| fn lint_levels(tcx: TyCtxt<'_>, cnum: CrateNum) -> &LintLevelMap { | ||
| assert_eq!(cnum, LOCAL_CRATE); | ||
| let store = &tcx.lint_store; | ||
| let mut builder = LintLevelMapBuilder { | ||
| levels: LintLevelSets::builder(tcx.sess, false, &store), | ||
| tcx: tcx, | ||
| store: store, | ||
| }; | ||
| let krate = tcx.hir().krate(); | ||
|
|
||
| let push = builder.levels.push(&krate.attrs, &store); | ||
| builder.levels.register_id(hir::CRATE_HIR_ID); | ||
| for macro_def in krate.exported_macros { | ||
| builder.levels.register_id(macro_def.hir_id); | ||
| } | ||
| intravisit::walk_crate(&mut builder, krate); | ||
| builder.levels.pop(push); | ||
|
|
||
| tcx.arena.alloc(builder.levels.build_map()) | ||
| } | ||
|
|
||
| struct LintLevelMapBuilder<'a, 'tcx> { | ||
| levels: LintLevelsBuilder<'tcx>, | ||
| tcx: TyCtxt<'tcx>, | ||
| store: &'a LintStore, | ||
| } | ||
|
|
||
| impl LintLevelMapBuilder<'_, '_> { | ||
| fn with_lint_attrs<F>(&mut self, id: hir::HirId, attrs: &[ast::Attribute], f: F) | ||
| where | ||
| F: FnOnce(&mut Self), | ||
| { | ||
| let push = self.levels.push(attrs, self.store); | ||
| if push.changed { | ||
| self.levels.register_id(id); | ||
| } | ||
| f(self); | ||
| self.levels.pop(push); | ||
| } | ||
| } | ||
|
|
||
| impl<'tcx> intravisit::Visitor<'tcx> for LintLevelMapBuilder<'_, 'tcx> { | ||
| fn nested_visit_map<'this>(&'this mut self) -> intravisit::NestedVisitorMap<'this, 'tcx> { | ||
| intravisit::NestedVisitorMap::All(&self.tcx.hir()) | ||
| } | ||
|
|
||
| fn visit_param(&mut self, param: &'tcx hir::Param<'tcx>) { | ||
| self.with_lint_attrs(param.hir_id, ¶m.attrs, |builder| { | ||
| intravisit::walk_param(builder, param); | ||
| }); | ||
| } | ||
|
|
||
| fn visit_item(&mut self, it: &'tcx hir::Item<'tcx>) { | ||
| self.with_lint_attrs(it.hir_id, &it.attrs, |builder| { | ||
| intravisit::walk_item(builder, it); | ||
| }); | ||
| } | ||
|
|
||
| fn visit_foreign_item(&mut self, it: &'tcx hir::ForeignItem<'tcx>) { | ||
| self.with_lint_attrs(it.hir_id, &it.attrs, |builder| { | ||
| intravisit::walk_foreign_item(builder, it); | ||
| }) | ||
| } | ||
|
|
||
| fn visit_expr(&mut self, e: &'tcx hir::Expr<'tcx>) { | ||
| self.with_lint_attrs(e.hir_id, &e.attrs, |builder| { | ||
| intravisit::walk_expr(builder, e); | ||
| }) | ||
| } | ||
|
|
||
| fn visit_struct_field(&mut self, s: &'tcx hir::StructField<'tcx>) { | ||
| self.with_lint_attrs(s.hir_id, &s.attrs, |builder| { | ||
| intravisit::walk_struct_field(builder, s); | ||
| }) | ||
| } | ||
|
|
||
| fn visit_variant( | ||
| &mut self, | ||
| v: &'tcx hir::Variant<'tcx>, | ||
| g: &'tcx hir::Generics<'tcx>, | ||
| item_id: hir::HirId, | ||
| ) { | ||
| self.with_lint_attrs(v.id, &v.attrs, |builder| { | ||
| intravisit::walk_variant(builder, v, g, item_id); | ||
| }) | ||
| } | ||
|
|
||
| fn visit_local(&mut self, l: &'tcx hir::Local<'tcx>) { | ||
| self.with_lint_attrs(l.hir_id, &l.attrs, |builder| { | ||
| intravisit::walk_local(builder, l); | ||
| }) | ||
| } | ||
|
|
||
| fn visit_arm(&mut self, a: &'tcx hir::Arm<'tcx>) { | ||
| self.with_lint_attrs(a.hir_id, &a.attrs, |builder| { | ||
| intravisit::walk_arm(builder, a); | ||
| }) | ||
| } | ||
|
|
||
| fn visit_trait_item(&mut self, trait_item: &'tcx hir::TraitItem<'tcx>) { | ||
| self.with_lint_attrs(trait_item.hir_id, &trait_item.attrs, |builder| { | ||
| intravisit::walk_trait_item(builder, trait_item); | ||
| }); | ||
| } | ||
|
|
||
| fn visit_impl_item(&mut self, impl_item: &'tcx hir::ImplItem<'tcx>) { | ||
| self.with_lint_attrs(impl_item.hir_id, &impl_item.attrs, |builder| { | ||
| intravisit::walk_impl_item(builder, impl_item); | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| pub fn provide(providers: &mut Providers<'_>) { | ||
| providers.lint_levels = lint_levels; | ||
| } |
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