1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/rustc_expand/src/errors.rs b/compiler/rustc_expand/src/errors.rs
index fe901603c73..21ce5e1d81e 100644
--- a/compiler/rustc_expand/src/errors.rs
+++ b/compiler/rustc_expand/src/errors.rs
@@ -448,3 +448,11 @@ pub struct InvalidFragmentSpecifier {
     pub fragment: Ident,
     pub help: String,
 }
+
+#[derive(Diagnostic)]
+#[diag(expand_expected_paren_or_brace)]
+pub struct ExpectedParenOrBrace<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub token: Cow<'a, str>,
+}