[clang-format] Fix qualifier ordering for lines after PP directives (#160731)

Lines appearing after preprocessor conditional blocks (like `#endif`)
were not having their qualifiers reordered by `QualifierOrder`, while
lines inside the conditional blocks were processed correctly.

The issue was that tokens on lines following preprocessor directives
have `MustBreakBefore` = `true`. The qualifier alignment logic was
breaking immediately upon encountering any token with `MustBreakBefore`
= `true`, preventing analysis of the entire line.

The fix allows processing to continue when `MustBreakBefore` = `true` on
the first token of a line, since this is expected behavior (the token
legitimately starts a new line). Only tokens with `MustBreakBefore` =
`true` that appear mid-line will cause the analysis loop to break.

Fixes https://github.com/llvm/llvm-project/issues/160487.

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Format/QualifierAlignmentFixer.cpp b/clang/lib/Format/QualifierAlignmentFixer.cpp
index 441a37a..043d957 100644
--- a/clang/lib/Format/QualifierAlignmentFixer.cpp
+++ b/clang/lib/Format/QualifierAlignmentFixer.cpp
@@ -571,7 +571,7 @@ void LeftRightQualifierAlignmentFixer::fixQualifierAlignment(
 
     for (const auto *Tok = First; Tok && Tok != Last && Tok->Next;
          Tok = Tok->Next) {
-      if (Tok->MustBreakBefore)
+      if (Tok->MustBreakBefore && Tok != First)
         break;
       if (Tok->is(tok::comment))
         continue;