[clang] [clang-format] Correctly annotate braces in macro definition (PR #106662)

[Owen Pan via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/106662

Fixes #106418.

>From fbefbaae69e7238cf0fd52afe5ccc6b871e81b84 Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Thu, 29 Aug 2024 22:14:46 -0700
Subject: [PATCH] [clang-format] Correctly annotate braces in macro definition

Fixes #106418.
---
 clang/lib/Format/UnwrappedLineParser.cpp      | 3 +--
 clang/unittests/Format/TokenAnnotatorTest.cpp | 5 +++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 5b518bf6c859e8..54777c3563cb30 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -609,9 +609,8 @@ void UnwrappedLineParser::calculateBraceTypes(bool ExpectClassBody) {
             ProbablyBracedList = NextTok->isNot(tok::l_square);
           }
 
-          // Cpp macro definition body that is a nonempty braced list or block:
+          // Cpp macro definition body containing nonempty braced list or block:
           if (IsCpp && Line->InMacroBody && PrevTok != FormatTok &&
-              !FormatTok->Previous && NextTok->is(tok::eof) &&
               // A statement can end with only `;` (simple statement), a block
               // closing brace (compound statement), or `:` (label statement).
               // If PrevTok is a block opening brace, Tok ends an empty block.
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
index 5aa5d93c1cb067..136530cf49d253 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -3256,6 +3256,11 @@ TEST_F(TokenAnnotatorTest, BraceKind) {
   EXPECT_BRACE_KIND(Tokens[10], BK_Block);
   EXPECT_TOKEN(Tokens[11], tok::r_brace, TT_StructRBrace);
   EXPECT_BRACE_KIND(Tokens[11], BK_Block);
+
+  Tokens = annotate("#define MEMBER(NAME) NAME{\"\"}");
+  ASSERT_EQ(Tokens.size(), 11u) << Tokens;
+  EXPECT_BRACE_KIND(Tokens[7], BK_BracedInit);
+  EXPECT_BRACE_KIND(Tokens[9], BK_BracedInit);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsElaboratedTypeSpecifier) {