Add missing diagnostics and flesh out tests

2024-08-26 16:31:06 -04:00
parent 7c8e281f73
commit 174c3f9519
25 changed files with 508 additions and 19 deletions
--- a/compiler/rustc_ast_lowering/src/lib.rs
+++ b/compiler/rustc_ast_lowering/src/lib.rs
@@ -494,9 +494,14 @@ enum AllowReturnTypeNotation {
 }

 enum GenericArgsMode {
+    /// Allow paren sugar, don't allow RTN.
    ParenSugar,
+    /// Allow RTN, don't allow paren sugar.
    ReturnTypeNotation,
+    // Error if parenthesized generics or RTN are encountered.
    Err,
+    /// Silence errors when lowering generics. Only used with `Res::Err`.
+    Silence,
 }

 impl<'a, 'hir> LoweringContext<'a, 'hir> {