diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs index a83b5b78f9c..8886a78c6ec 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs @@ -2212,6 +2212,17 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { try_emit("delegation with early bound generics"); } + // There is no way to instantiate `Self` param for caller if + // 1. callee is a trait method + // 2. delegation item isn't an associative item + if let DefKind::AssocFn = self.tcx().def_kind(sig_id) + && let DefKind::Fn = self.tcx().def_kind(self.item_def_id()) + && self.tcx().associated_item(sig_id).container + == ty::AssocItemContainer::TraitContainer + { + try_emit("delegation to a trait method from a free function"); + } + if self.tcx().asyncness(sig_id) == ty::Asyncness::Yes { try_emit("delegation to async functions"); } |