551               .Case("include", PDK_Skipped)  in ComputePreamble()
552               .Case("__include_macros", PDK_Skipped)  in ComputePreamble()
553               .Case("define", PDK_Skipped)  in ComputePreamble()
554               .Case("undef", PDK_Skipped)  in ComputePreamble()
555               .Case("line", PDK_Skipped)  in ComputePreamble()
556               .Case("error", PDK_Skipped)  in ComputePreamble()
557               .Case("pragma", PDK_Skipped)  in ComputePreamble()
558               .Case("import", PDK_Skipped)  in ComputePreamble()
559               .Case("include_next", PDK_Skipped)  in ComputePreamble()
560               .Case("warning", PDK_Skipped)  in ComputePreamble()
561               .Case("ident", PDK_Skipped)  in ComputePreamble()
562               .Case("sccs", PDK_Skipped)  in ComputePreamble()
563               .Case("assert", PDK_Skipped)  in ComputePreamble()
564               .Case("unassert", PDK_Skipped)  in ComputePreamble()
565               .Case("if", PDK_StartIf)  in ComputePreamble()
566               .Case("ifdef", PDK_StartIf)  in ComputePreamble()
567               .Case("ifndef", PDK_StartIf)  in ComputePreamble()
568               .Case("elif", PDK_Skipped)  in ComputePreamble()
569               .Case("else", PDK_Skipped)  in ComputePreamble()
570               .Case("endif", PDK_EndIf)  in ComputePreamble()