[clang-format] Fix a bug in annotating braces (#134039)

Fix #133873

Author: owenca

clang/lib/Format/UnwrappedLineParser.cpp

@@ -1887,8 +1887,11 @@ void UnwrappedLineParser::parseStructuralElement(
       if (FormatTok->isBinaryOperator())
         nextToken();
       break;
-    case tok::caret:
+    case tok::caret: {
+      const auto *Prev = FormatTok->getPreviousNonComment();
       nextToken();
+      if (Prev && Prev->is(tok::identifier))
+        break;
       // Block return type.
       if (FormatTok->Tok.isAnyIdentifier() || FormatTok->isTypeName(LangOpts)) {
         nextToken();
@@ -1903,6 +1906,7 @@ void UnwrappedLineParser::parseStructuralElement(
       if (FormatTok->is(tok::l_brace))
         parseChildBlock();
       break;
+    }
     case tok::l_brace:
       if (InRequiresExpression)
         FormatTok->setFinalizedType(TT_BracedListLBrace);

clang/unittests/Format/TokenAnnotatorTest.cpp

@@ -3622,6 +3622,11 @@ TEST_F(TokenAnnotatorTest, BraceKind) {
   ASSERT_EQ(Tokens.size(), 11u) << Tokens;
   EXPECT_BRACE_KIND(Tokens[7], BK_BracedInit);
   EXPECT_BRACE_KIND(Tokens[9], BK_BracedInit);
+
+  Tokens = annotate("return lhs ^ Byte{rhs};");
+  ASSERT_EQ(Tokens.size(), 9u) << Tokens;
+  EXPECT_BRACE_KIND(Tokens[4], BK_BracedInit);
+  EXPECT_BRACE_KIND(Tokens[6], BK_BracedInit);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsElaboratedTypeSpecifier) {