Skip to content

[clang] fix regression parsing C enum which doesn't declare anything #155904

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Aug 28, 2025
Merged

[clang] fix regression parsing C enum which doesn't declare anything #155904

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 2 additions & 4 deletions clang/lib/Sema/SemaDecl.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5291,10 +5291,8 @@ Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
// UNION_TYPE; <- where UNION_TYPE is a typedef union.
if ((Tag && Tag->getDeclName()) ||
DS.getTypeSpecType() == DeclSpec::TST_typename) {
RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag);
if (!Record)
Record = DS.getRepAsType().get()->getAsRecordDecl();

RecordDecl *Record = Tag ? dyn_cast<RecordDecl>(Tag)
: DS.getRepAsType().get()->getAsRecordDecl();
if (Record && getLangOpts().MicrosoftExt) {
Diag(DS.getBeginLoc(), diag::ext_ms_anonymous_record)
<< Record->isUnion() << DS.getSourceRange();
Expand Down
6 changes: 6 additions & 0 deletions clang/test/Sema/GH155794.c
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
// RUN: %clang_cc1 -fsyntax-only -verify -Wno-everything %s

struct S {
enum e1 {} // expected-error {{use of empty enum}} expected-error {{expected ';' after enum}}
enum e2 {} // expected-error {{use of empty enum}}
}; // expected-error {{expected member name or ';' after declaration specifiers}}