[clang-format] Don't annotate C compound literal r_paren (llvm#180436)

owenca · c-rhodes · commit 275e5b478d5d · 2026-02-11T09:57:17.000Z
Fixes llvm#180179 (cherry picked from commit 2302110)
diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
@@ -2921,7 +2921,9 @@ class AnnotatingParser {
     if (!AfterRParen->Next)
       return false;
 
-    if (AfterRParen->is(tok::l_brace) &&
+    // A pair of parentheses before an l_brace in C starts a compound literal
+    // and is not a cast.
+    if (Style.Language != FormatStyle::LK_C && AfterRParen->is(tok::l_brace) &&
         AfterRParen->getBlockKind() == BK_BracedInit) {
       return true;
     }
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -964,6 +964,14 @@ TEST_F(TokenAnnotatorTest, UnderstandsCasts) {
   EXPECT_TOKEN(Tokens[11], tok::amp, TT_UnaryOperator);
 }
 
+TEST_F(TokenAnnotatorTest, CompoundLiteral) {
+  auto Tokens =
+      annotate("return (struct foo){};", getLLVMStyle(FormatStyle::LK_C));
+  ASSERT_EQ(Tokens.size(), 9u) << Tokens;
+  // Not TT_CastRParen.
+  EXPECT_TOKEN(Tokens[4], tok::r_paren, TT_Unknown);
+}
+
 TEST_F(TokenAnnotatorTest, UnderstandsDynamicExceptionSpecifier) {
   auto Tokens = annotate("void f() throw(int);");
   ASSERT_EQ(Tokens.size(), 10u) << Tokens;
