282   directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override;
399   llvm::sys::fs::directory_iterator Iter;
403     if (Iter != llvm::sys::fs::directory_iterator())  in RealFSDirIter()
410     CurrentEntry = (Iter == llvm::sys::fs::directory_iterator())  in increment()
419 directory_iterator RealFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
422   return directory_iterator(  in dir_begin()
529   SmallVector<directory_iterator, 8> IterList;
531   directory_iterator CurrentDirIter;
541       if (CurrentDirIter != directory_iterator())  in incrementIter()
545     if (IsFirstTime && CurrentDirIter == directory_iterator())  in incrementIter()
551     assert((IsFirstTime || CurrentDirIter != directory_iterator()) &&  in incrementDirIter()
556     if (!EC && CurrentDirIter == directory_iterator())  in incrementDirIter()
564       if (EC || CurrentDirIter == directory_iterator()) {  in incrementImpl()
581       directory_iterator Iter = FS->dir_begin(Dir, FEC);  in CombiningDirIterImpl()
592   CombiningDirIterImpl(ArrayRef<directory_iterator> DirIters,  in CombiningDirIterImpl()
603 directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
605   directory_iterator Combined = directory_iterator(  in dir_begin()
1145 directory_iterator InMemoryFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1150     return directory_iterator(std::make_shared<DirIterator>());  in dir_begin()
1154     return directory_iterator(  in dir_begin()
1158   return directory_iterator(std::make_shared<DirIterator>());  in dir_begin()
1306   llvm::vfs::directory_iterator ExternalIter;
1310                                 llvm::vfs::directory_iterator ExtIter)  in RedirectingFSDirRemapIterImpl()
1313     if (ExternalIter != llvm::vfs::directory_iterator())  in RedirectingFSDirRemapIterImpl()
1331     if (!EC && ExternalIter != llvm::vfs::directory_iterator())  in increment()
1426 directory_iterator RedirectingFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1463   directory_iterator RedirectIter;  in dir_begin()
1472           directory_iterator(std::make_shared<RedirectingFSDirRemapIterImpl>(  in dir_begin()
1478         directory_iterator(std::make_shared<RedirectingFSDirIterImpl>(  in dir_begin()
1496   directory_iterator ExternalIter = ExternalFS->dir_begin(Path, ExternalEC);  in dir_begin()
1505   SmallVector<directory_iterator, 2> Iters;  in dir_begin()
1519   directory_iterator Combined{  in dir_begin()
2913   directory_iterator I = FS->dir_begin(Path, EC);  in recursive_directory_iterator()
2914   if (I != directory_iterator()) {  in recursive_directory_iterator()
2924   vfs::directory_iterator End;  in increment()
2930       vfs::directory_iterator I =  in increment()