[clang-tidy][modernize-use-using]fix function pointer typedef correctly (#65558)

Fixed #65055
For normal type, typedef is from typedef to the end of original type,
but for function pointer it is from typedef to the end.
So it needs to consider alias name length for normal type.

1 files changed, 4 insertions, 2 deletions

diff --git a/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
index c1af8b5..22dc9e2 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
@@ -120,8 +120,10 @@ void UseUsingCheck::check(const MatchFinder::MatchResult &Result) {
         Type.substr(0, FirstTypedefType.size()) == FirstTypedefType)
       Type = FirstTypedefName + Type.substr(FirstTypedefType.size() + 1);
   }
-  if (!ReplaceRange.getEnd().isMacroID())
-    LastReplacementEnd = ReplaceRange.getEnd().getLocWithOffset(Name.size());
+  if (!ReplaceRange.getEnd().isMacroID()) {
+    const SourceLocation::IntTy Offset = MatchedDecl->getFunctionType() ? 0 : Name.size();
+    LastReplacementEnd = ReplaceRange.getEnd().getLocWithOffset(Offset);
+  }
 
   auto Diag = diag(ReplaceRange.getBegin(), UseUsingWarning);