[clang] [clang-format] Correctly annotate tok::star in braced list (PR #138389)

[Owen Pan via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/138389

Fix #138382

>From 36e7e2002439dcdb084e949a265a280551597800 Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Sat, 3 May 2025 01:21:03 -0700
Subject: [PATCH] [clang-format] Correctly annotate tok::star in braced list

Fix #138382
---
 clang/lib/Format/TokenAnnotator.cpp           | 12 ++++++++----
 clang/unittests/Format/TokenAnnotatorTest.cpp |  5 +++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index ea0086fd49a33..caf386cffd25b 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -3103,10 +3103,14 @@ class AnnotatingParser {
     // Or expressions like:
     //   width * height * length
     if (NextToken->Tok.isAnyIdentifier()) {
-      const FormatToken *NextNextToken = NextToken->getNextNonComment();
-      if (NextNextToken && (NextNextToken->is(tok::arrow) ||
-                            NextNextToken->isPointerOrReference())) {
-        return TT_BinaryOperator;
+      auto *NextNextToken = NextToken->getNextNonComment();
+      if (NextNextToken) {
+        if (NextNextToken->is(tok::arrow))
+          return TT_BinaryOperator;
+        if (NextNextToken->isPointerOrReference()) {
+          NextNextToken->setFinalizedType(TT_BinaryOperator);
+          return TT_BinaryOperator;
+        }
       }
     }
 
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
index 124fb43dcf5ac..0fb64ceec5c97 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -406,6 +406,11 @@ TEST_F(TokenAnnotatorTest, UnderstandsUsesOfStarAndAmp) {
   ASSERT_EQ(Tokens.size(), 16u) << Tokens;
   EXPECT_TOKEN(Tokens[9], tok::star, TT_BinaryOperator);
   EXPECT_TOKEN(Tokens[11], tok::star, TT_BinaryOperator);
+
+  Tokens = annotate("float foo[3] = {M * H * H, H * M * H, H * H * M};");
+  ASSERT_EQ(Tokens.size(), 27u) << Tokens;
+  EXPECT_TOKEN(Tokens[16], tok::star, TT_BinaryOperator);
+  EXPECT_TOKEN(Tokens[22], tok::star, TT_BinaryOperator);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsUsesOfPlusAndMinus) {