revert unintentional changes.

Author: hokein

clang/lib/Basic/SourceManager.cpp

@@ -1879,7 +1879,9 @@ SourceManager::getMacroArgExpandedLocation(SourceLocation Loc) const {
   if (Loc.isInvalid() || !Loc.isFileID())
     return Loc;
 
-  auto [FID, Offset] = getDecomposedLoc(Loc);
+  FileID FID;
+  unsigned Offset;
+  std::tie(FID, Offset) = getDecomposedLoc(Loc);
   if (FID.isInvalid())
     return Loc;
 

clang/lib/Sema/SemaOverload.cpp

@@ -15829,10 +15829,6 @@ ExprResult Sema::CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
 
     CXXRecordDecl *NamingClass = nullptr; // lookup ignores member operators
     // CHECKME: no 'operator' keyword?
-    // DeclarationNameInfo OpNameInfo(
-    //     OpName, LLoc,
-    //     DeclarationNameLoc::makeCXXOperatorNameLoc(
-    //         Context.getCXXOperatorSourceInfo(SourceRange(LLoc, RLoc))));
     DeclarationNameInfo OpNameInfo(OpName, LLoc);
     OpNameInfo.setCXXOperatorNameInfo(
         Context.getCXXOperatorSourceInfo(SourceRange(LLoc, RLoc)));