fix #105061, Fix unused_parens issue for higher ranked function pointers

2022-12-24 02:41:06 +08:00
parent 44a500c8c1
commit 7d99866bfc
4 changed files with 43 additions and 1 deletions
--- a/compiler/rustc_lint/src/early.rs
+++ b/compiler/rustc_lint/src/early.rs
@@ -248,6 +248,12 @@ impl<'a, T: EarlyLintPass> ast_visit::Visitor<'a> for EarlyContextAndPass<'a, T>
    }

    fn visit_where_predicate(&mut self, p: &'a ast::WherePredicate) {
+        use rustc_ast::{WhereBoundPredicate, WherePredicate};
+        if let WherePredicate::BoundPredicate(WhereBoundPredicate { bounded_ty, .. }) = p &&
+            let ast::TyKind::BareFn(b) = &bounded_ty.kind &&
+            b.generic_params.len() > 0 {
+                return;
+        }
        ast_visit::walk_where_predicate(self, p);
    }