diff options
Diffstat (limited to 'compiler/rustc_lint/src/context.rs')
| -rw-r--r-- | compiler/rustc_lint/src/context.rs | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/compiler/rustc_lint/src/context.rs b/compiler/rustc_lint/src/context.rs index cec0003ff..e6a0d7e60 100644 --- a/compiler/rustc_lint/src/context.rs +++ b/compiler/rustc_lint/src/context.rs @@ -206,7 +206,7 @@ impl LintStore { self.late_module_passes.push(Box::new(pass)); } - // Helper method for register_early/late_pass + /// Helper method for register_early/late_pass pub fn register_lints(&mut self, lints: &[&'static Lint]) { for lint in lints { self.lints.push(lint); @@ -579,6 +579,7 @@ pub trait LintContext: Sized { /// Return value of the `decorate` closure is ignored, see [`struct_lint_level`] for a detailed explanation. /// /// [`struct_lint_level`]: rustc_middle::lint::struct_lint_level#decorate-signature + #[rustc_lint_diagnostics] fn lookup_with_diagnostics( &self, lint: &'static Lint, @@ -882,6 +883,7 @@ pub trait LintContext: Sized { /// Return value of the `decorate` closure is ignored, see [`struct_lint_level`] for a detailed explanation. /// /// [`struct_lint_level`]: rustc_middle::lint::struct_lint_level#decorate-signature + #[rustc_lint_diagnostics] fn lookup<S: Into<MultiSpan>>( &self, lint: &'static Lint, @@ -908,6 +910,7 @@ pub trait LintContext: Sized { /// Return value of the `decorate` closure is ignored, see [`struct_lint_level`] for a detailed explanation. /// /// [`struct_lint_level`]: rustc_middle::lint::struct_lint_level#decorate-signature + #[rustc_lint_diagnostics] fn struct_span_lint<S: Into<MultiSpan>>( &self, lint: &'static Lint, @@ -933,6 +936,7 @@ pub trait LintContext: Sized { /// Return value of the `decorate` closure is ignored, see [`struct_lint_level`] for a detailed explanation. /// /// [`struct_lint_level`]: rustc_middle::lint::struct_lint_level#decorate-signature + #[rustc_lint_diagnostics] fn lint( &self, lint: &'static Lint, @@ -1155,7 +1159,7 @@ impl<'tcx> LateContext<'tcx> { fn print_dyn_existential( self, - _predicates: &'tcx ty::List<ty::Binder<'tcx, ty::ExistentialPredicate<'tcx>>>, + _predicates: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>, ) -> Result<Self::DynExistential, Self::Error> { Ok(()) } @@ -1241,6 +1245,23 @@ impl<'tcx> LateContext<'tcx> { AbsolutePathPrinter { tcx: self.tcx }.print_def_path(def_id, &[]).unwrap() } + + /// Returns the associated type `name` for `self_ty` as an implementation of `trait_id`. + /// Do not invoke without first verifying that the type implements the trait. + pub fn get_associated_type( + &self, + self_ty: Ty<'tcx>, + trait_id: DefId, + name: &str, + ) -> Option<Ty<'tcx>> { + let tcx = self.tcx; + tcx.associated_items(trait_id) + .find_by_name_and_kind(tcx, Ident::from_str(name), ty::AssocKind::Type, trait_id) + .and_then(|assoc| { + let proj = tcx.mk_projection(assoc.def_id, tcx.mk_substs_trait(self_ty, [])); + tcx.try_normalize_erasing_regions(self.param_env, proj).ok() + }) + } } impl<'tcx> abi::HasDataLayout for LateContext<'tcx> { |