1208   std::optional<SourceRange> findGapAreaBetween(SourceLocation AfterLoc,  in findGapAreaBetween()
1213     if (AfterLoc.isInvalid() || BeforeLoc.isInvalid())  in findGapAreaBetween()
1218     if (AfterLoc.isMacroID()) {  in findGapAreaBetween()
1219       FileID FID = SM.getFileID(AfterLoc);  in findGapAreaBetween()
1222         AfterLoc = EI->getExpansionLocEnd();  in findGapAreaBetween()
1225     size_t StartDepth = locationDepth(AfterLoc);  in findGapAreaBetween()
1227     while (!SM.isWrittenInSameFile(AfterLoc, BeforeLoc)) {  in findGapAreaBetween()
1239         assert(SM.isWrittenInSameFile(AfterLoc,  in findGapAreaBetween()
1240                                       getEndOfFileOrMacro(AfterLoc)));  in findGapAreaBetween()
1242         AfterLoc = getIncludeOrExpansionLoc(AfterLoc);  in findGapAreaBetween()
1243         assert(AfterLoc.isValid());  in findGapAreaBetween()
1244         AfterLoc = getPreciseTokenLocEnd(AfterLoc);  in findGapAreaBetween()
1245         assert(AfterLoc.isValid());  in findGapAreaBetween()
1249     AfterLoc = getPreciseTokenLocEnd(AfterLoc);  in findGapAreaBetween()
1252     if (AfterLoc.isMacroID() || BeforeLoc.isMacroID())  in findGapAreaBetween()
1254     if (!SM.isWrittenInSameFile(AfterLoc, BeforeLoc) ||  in findGapAreaBetween()
1255         !SpellingRegion(SM, AfterLoc, BeforeLoc).isInSourceOrder())  in findGapAreaBetween()
1257     return {{AfterLoc, BeforeLoc}};  in findGapAreaBetween()