[clang-format] Correctly annotate l_brace after TypenameMacro (#96026)

Closes #95418.

Author: owenca

clang/lib/Format/UnwrappedLineParser.cpp

@@ -1910,7 +1910,8 @@ void UnwrappedLineParser::parseStructuralElement(
         } else if (Style.BraceWrapping.AfterFunction) {
           addUnwrappedLine();
         }
-        FormatTok->setFinalizedType(TT_FunctionLBrace);
+        if (!Previous || Previous->isNot(TT_TypeDeclarationParen))
+          FormatTok->setFinalizedType(TT_FunctionLBrace);
         parseBlock();
         IsDecltypeAutoFunction = false;
         addUnwrappedLine();
@@ -2545,10 +2546,10 @@ bool UnwrappedLineParser::parseParens(TokenType AmpAmpTokenType) {
       if (Style.Language == FormatStyle::LK_Java && FormatTok->is(tok::l_brace))
         parseChildBlock();
       break;
-    case tok::r_paren:
+    case tok::r_paren: {
+      const auto *Prev = LeftParen->Previous;
       if (!MightBeStmtExpr && !MightBeFoldExpr && !Line->InMacroBody &&
           Style.RemoveParentheses > FormatStyle::RPS_Leave) {
-        const auto *Prev = LeftParen->Previous;
         const auto *Next = Tokens->peekNextToken();
         const bool DoubleParens =
             Prev && Prev->is(tok::l_paren) && Next && Next->is(tok::r_paren);
@@ -2570,8 +2571,13 @@ bool UnwrappedLineParser::parseParens(TokenType AmpAmpTokenType) {
           FormatTok->Optional = true;
         }
       }
+      if (Prev && Prev->is(TT_TypenameMacro)) {
+        LeftParen->setFinalizedType(TT_TypeDeclarationParen);
+        FormatTok->setFinalizedType(TT_TypeDeclarationParen);
+      }
       nextToken();
       return SeenEqual;
+    }
     case tok::r_brace:
       // A "}" inside parenthesis is an error if there wasn't a matching "{".
       return SeenEqual;

clang/unittests/Format/FormatTest.cpp

@@ -27007,6 +27007,9 @@ TEST_F(FormatTest, RemoveSemicolon) {
                "; int bar;",
                Style);
 #endif
+
+  Style.TypenameMacros.push_back("STRUCT");
+  verifyFormat("STRUCT(T, B) { int i; };", Style);
 }
 
 TEST_F(FormatTest, BreakAfterAttributes) {

clang/unittests/Format/TokenAnnotatorTest.cpp

@@ -3180,6 +3180,18 @@ TEST_F(TokenAnnotatorTest, FunctionTryBlock) {
   EXPECT_TOKEN(Tokens[36], tok::l_brace, TT_FunctionLBrace);
 }
 
+TEST_F(TokenAnnotatorTest, TypenameMacro) {
+  auto Style = getLLVMStyle();
+  Style.TypenameMacros.push_back("STRUCT");
+
+  auto Tokens = annotate("STRUCT(T, B) { int i; };", Style);
+  ASSERT_EQ(Tokens.size(), 13u);
+  EXPECT_TOKEN(Tokens[0], tok::identifier, TT_TypenameMacro);
+  EXPECT_TOKEN(Tokens[1], tok::l_paren, TT_TypeDeclarationParen);
+  EXPECT_TOKEN(Tokens[5], tok::r_paren, TT_TypeDeclarationParen);
+  EXPECT_TOKEN(Tokens[6], tok::l_brace, TT_Unknown);
+}
+
 } // namespace
 } // namespace format
 } // namespace clang