[clang-format] Don't move qualifiers past pointers-to-member

Previously, given a pointer-to-member type such as `Foo const Bar::*`,
clang-format would see the `const Bar::` part as a regular type name
with scope resolution operators, and with `QualifierAlignment: Right` it
would attempt to "fix" it, resulting in `Foo Bar::const *`, a syntax
error.

This patch no longer allows qualifiers to be moved across `::*`.

Fixes https://github.com/llvm/llvm-project/issues/60898

Reviewed By: owenpan, MyDeveloperDay, HazardyKnusperkeks

Differential Revision: https://reviews.llvm.org/D144537

1 files changed, 4 insertions, 1 deletions

diff --git a/clang/lib/Format/QualifierAlignmentFixer.cpp b/clang/lib/Format/QualifierAlignmentFixer.cpp
index cef8b36..609b412 100644
--- a/clang/lib/Format/QualifierAlignmentFixer.cpp
+++ b/clang/lib/Format/QualifierAlignmentFixer.cpp
@@ -280,8 +280,11 @@ const FormatToken *LeftRightQualifierAlignmentFixer::analyzeRight(
     // The case  `const Foo &&` -> `Foo const &&`
     // The case  `const std::Foo &&` -> `std::Foo const &&`
     // The case  `const std::Foo<T> &&` -> `std::Foo<T> const &&`
-    while (Next && Next->isOneOf(tok::identifier, tok::coloncolon))
+    // However,  `const Bar::*` remains the same.
+    while (Next && Next->isOneOf(tok::identifier, tok::coloncolon) &&
+           !Next->startsSequence(tok::coloncolon, tok::star)) {
       Next = Next->Next;
+    }
     if (Next && Next->is(TT_TemplateOpener)) {
       Next = Next->MatchingParen;
       // Move to the end of any template class members e.g.