[clang] [clang-format] Fix a regression in annotating ObjCBlockLParen (PR #107021)

[Owen Pan via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/107021

Fixes #106994.

>From 563ad14fb2b5b91adbc906fce34e74e71dc1f141 Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Mon, 2 Sep 2024 14:02:54 -0700
Subject: [PATCH] [clang-format] Fix a regression in annotating ObjCBlockLParen

Fixes #106994.
---
 clang/lib/Format/TokenAnnotator.cpp           | 3 +--
 clang/unittests/Format/TokenAnnotatorTest.cpp | 7 +++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 64e936f627d438..bf37062393719c 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -3588,8 +3588,7 @@ static FormatToken *getFunctionName(const AnnotatedLine &Line,
 
     // Make sure the name is followed by a pair of parentheses.
     if (Name) {
-      if (Tok->is(tok::l_paren) && Tok->isNot(TT_FunctionTypeLParen) &&
-          Tok->MatchingParen) {
+      if (Tok->is(tok::l_paren) && Tok->is(TT_Unknown) && Tok->MatchingParen) {
         OpeningParen = Tok;
         return Name;
       }
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
index 5d37a65250d0b1..b8a86245808e5a 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -1678,6 +1678,13 @@ TEST_F(TokenAnnotatorTest, UnderstandsObjCBlock) {
                     "}();");
   ASSERT_EQ(Tokens.size(), 19u) << Tokens;
   EXPECT_TOKEN(Tokens[9], tok::l_brace, TT_ObjCBlockLBrace);
+
+  Tokens = annotate("id (^block)(Foo *a) = ^id _Nullable(Foo *_Nullable a) {\n"
+                    "  return a;\n"
+                    "};");
+  ASSERT_EQ(Tokens.size(), 27u) << Tokens;
+  EXPECT_TOKEN(Tokens[0], tok::identifier, TT_Unknown); // Not CtorDtorDeclName.
+  EXPECT_TOKEN(Tokens[1], tok::l_paren, TT_ObjCBlockLParen);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsObjCMethodExpr) {