[clang-tools-extra] [clang-tidy] Fix misc-unused-parameters on params with attrs (PR #122286)

[Utkarsh Saxena via cfe-commits]

================
@@ -26,6 +29,17 @@ bool isOverrideMethod(const FunctionDecl *Function) {
     return MD->size_overridden_methods() > 0 || MD->hasAttr<OverrideAttr>();
   return false;
 }
+
+bool hasAttrAfterParam(const SourceManager *SourceManager,
+                       const ParmVarDecl *Param) {
+  for (const auto *Attr : Param->attrs()) {
+    if (SourceManager->isBeforeInTranslationUnit(Param->getLocation(),
+                                                 Attr->getLocation())) {
+      return true;
+    }
+  }
+  return false;
+}
----------------
usx95 wrote:

The behaviour seems correct then. Please add this test case in the tests.
`isBeforeInTranslationUnit` seems to be the correct function here.

https://github.com/llvm/llvm-project/pull/122286