325   std::unique_ptr<PPCallbacks> First, Second;  variable
330     : First(std::move(_First)), Second(std::move(_Second)) {}  in PPChainedCallbacks()
336     Second->FileChanged(Loc, Reason, FileType, PrevFID);  in FileChanged()
343     Second->FileSkipped(ParentFile, FilenameTok, FileType);  in FileSkipped()
349            Second->FileNotFound(FileName, RecoveryPath);  in FileNotFound()
360     Second->InclusionDirective(HashLoc, IncludeTok, FileName, IsAngled,  in InclusionDirective()
368     Second->moduleImport(ImportLoc, Path, Imported);  in moduleImport()
373     Second->EndOfMainFile();  in EndOfMainFile()
378     Second->Ident(Loc, str);  in Ident()
384     Second->PragmaComment(Loc, Kind, Str);  in PragmaComment()
390     Second->PragmaDetectMismatch(Loc, Name, Value);  in PragmaDetectMismatch()
396     Second->PragmaMessage(Loc, Namespace, Kind, Str);  in PragmaMessage()
401     Second->PragmaDiagnosticPush(Loc, Namespace);  in PragmaDiagnosticPush()
406     Second->PragmaDiagnosticPop(Loc, Namespace);  in PragmaDiagnosticPop()
412     Second->PragmaDiagnostic(Loc, Namespace, mapping, Str);  in PragmaDiagnostic()
418     Second->PragmaOpenCLExtension(NameLoc, Name, StateLoc, State);  in PragmaOpenCLExtension()
424     Second->PragmaWarning(Loc, WarningSpec, Ids);  in PragmaWarning()
429     Second->PragmaWarningPush(Loc, Level);  in PragmaWarningPush()
434     Second->PragmaWarningPop(Loc);  in PragmaWarningPop()
440     Second->MacroExpands(MacroNameTok, MD, Range, Args);  in MacroExpands()
445     Second->MacroDefined(MacroNameTok, MD);  in MacroDefined()
451     Second->MacroUndefined(MacroNameTok, MD);  in MacroUndefined()
457     Second->Defined(MacroNameTok, MD, Range);  in Defined()
462     Second->SourceRangeSkipped(Range);  in SourceRangeSkipped()
469     Second->If(Loc, ConditionRange, ConditionValue);  in If()
476     Second->Elif(Loc, ConditionRange, ConditionValue, IfLoc);  in Elif()
483     Second->Ifdef(Loc, MacroNameTok, MD);  in Ifdef()
490     Second->Ifndef(Loc, MacroNameTok, MD);  in Ifndef()
496     Second->Else(Loc, IfLoc);  in Else()
502     Second->Endif(Loc, IfLoc);  in Endif()