release/20.x: [clang-format] Fix the indent of StartOfName after AttributeMacro (#140361)

Backport 0cac25b

Author: owenca

clang/lib/Format/ContinuationIndenter.cpp

@@ -1452,7 +1452,9 @@ unsigned ContinuationIndenter::getNewLineColumn(const LineState &State) {
        (PreviousNonComment->ClosesTemplateDeclaration ||
         PreviousNonComment->ClosesRequiresClause ||
         (PreviousNonComment->is(TT_AttributeMacro) &&
-         Current.isNot(tok::l_paren)) ||
+         Current.isNot(tok::l_paren) &&
+         !Current.endsSequence(TT_StartOfName, TT_AttributeMacro,
+                               TT_PointerOrReference)) ||
         PreviousNonComment->isOneOf(
             TT_AttributeRParen, TT_AttributeSquare, TT_FunctionAnnotationRParen,
             TT_JavaAnnotation, TT_LeadingJavaAnnotation))) ||

clang/unittests/Format/FormatTest.cpp

@@ -12419,6 +12419,13 @@ TEST_F(FormatTest, UnderstandsAttributes) {
   verifyFormat("SomeType s __unused{InitValue};", CustomAttrs);
   verifyFormat("SomeType *__capability s(InitValue);", CustomAttrs);
   verifyFormat("SomeType *__capability s{InitValue};", CustomAttrs);
+
+  auto Style = getLLVMStyleWithColumns(60);
+  Style.AttributeMacros.push_back("my_fancy_attr");
+  Style.PointerAlignment = FormatStyle::PAS_Left;
+  verifyFormat("void foo(const MyLongTypeNameeeeeeeeeeeee* my_fancy_attr\n"
+               "             testttttttttt);",
+               Style);
 }
 
 TEST_F(FormatTest, UnderstandsPointerQualifiersInCast) {