[clang-format] Allow breaking before kw___attribute

[owenca]

Fixes #74784

[llvmbot]

@llvm/pr-subscribers-clang-format

Author: Owen Pan (owenca)

Changes

Fixes #74784

---

Full diff: https://github.com/llvm/llvm-project/pull/128623.diff

2 Files Affected:

• (modified) clang/lib/Format/TokenAnnotator.cpp (+2-3)
• (modified) clang/unittests/Format/FormatTest.cpp (+3)

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index d29c299768a68..2ffaee93b70ea 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -6202,6 +6202,8 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
                     TT_ClassHeadName, tok::kw_operator)) {
     return true;
   }
+  if (Right.isAttribute())
+    return true;
   if (Left.is(TT_PointerOrReference))
     return false;
   if (Right.isTrailingComment()) {
@@ -6346,9 +6348,6 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
                           tok::less, tok::coloncolon);
   }
 
-  if (Right.isAttribute())
-    return true;
-
   if (Right.is(tok::l_square) && Right.is(TT_AttributeSquare))
     return Left.isNot(TT_AttributeSquare);
 
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index fe0e47080a577..39266d17f824f 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -12613,6 +12613,9 @@ TEST_F(FormatTest, UnderstandsAttributes) {
   verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa __attribute__((unused))\n"
                "aaaaaaaaaaaaaaaaaaaaaaa(int i);");
   verifyFormat("__attribute__((nodebug)) ::qualified_type f();");
+  verifyFormat(
+      "RenderWidgetHostViewCocoa *\n"
+      "    __attribute__((objc_precise_lifetime)) keepSelfAlive = self;");
   FormatStyle AfterType = getLLVMStyle();
   AfterType.BreakAfterReturnType = FormatStyle::RTBS_All;
   verifyFormat("__attribute__((nodebug)) void\n"