[clang] [clang-format] Correctly annotate braces in ObjC square brackets (PR #106654)

[Owen Pan via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/106654

See https://github.com/llvm/llvm-project/pull/88238#issuecomment-2316954781.

>From b71f4cf3ae2844583171cd0cc75826b8911a7b2b Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Thu, 29 Aug 2024 19:27:32 -0700
Subject: [PATCH] [clang-format] Correctly annotate braces in ObjC square
 brackets

See https://github.com/llvm/llvm-project/pull/88238#issuecomment-2316954781.
---
 clang/lib/Format/UnwrappedLineParser.cpp      | 1 +
 clang/unittests/Format/TokenAnnotatorTest.cpp | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 5b518bf6c859e8..246b29d308bfaf 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -2682,6 +2682,7 @@ void UnwrappedLineParser::parseSquare(bool LambdaIntroducer) {
       break;
     }
     case tok::at:
+    case tok::colon:
       nextToken();
       if (FormatTok->is(tok::l_brace)) {
         nextToken();
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
index 5aa5d93c1cb067..aa6244f9365976 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -3286,6 +3286,14 @@ TEST_F(TokenAnnotatorTest, BlockLBrace) {
   EXPECT_BRACE_KIND(Tokens[4], BK_Block);
   EXPECT_TOKEN(Tokens[5], tok::l_brace, TT_BlockLBrace);
   EXPECT_BRACE_KIND(Tokens[5], BK_Block);
+
+  Tokens = annotate("[foo bar:{{0, 1}}];", getLLVMStyle(FormatStyle::LK_ObjC));
+  ASSERT_EQ(Tokens.size(), 14u) << Tokens;
+  EXPECT_TOKEN(Tokens[4], tok::l_brace, TT_Unknown); // Not TT_BlockLBrace.
+  EXPECT_BRACE_KIND(Tokens[4], BK_Unknown);          // Not BK_Block.
+  EXPECT_BRACE_KIND(Tokens[5], BK_BracedInit);
+  EXPECT_BRACE_KIND(Tokens[9], BK_Unknown);  // Not BK_Block.
+  EXPECT_BRACE_KIND(Tokens[10], BK_Unknown); // Not BK_Block.
 }
 
 TEST_F(TokenAnnotatorTest, SwitchExpression) {