257   directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override;
358   llvm::sys::fs::directory_iterator Iter;
362     if (Iter != llvm::sys::fs::directory_iterator())  in RealFSDirIter()
369     CurrentEntry = (Iter == llvm::sys::fs::directory_iterator())  in increment()
378 directory_iterator RealFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
381   return directory_iterator(  in dir_begin()
462   directory_iterator CurrentDirIter;
478       if (CurrentDirIter != directory_iterator())  in incrementFS()
485     assert((IsFirstTime || CurrentDirIter != directory_iterator()) &&  in incrementDirIter()
490     if (!EC && CurrentDirIter == directory_iterator())  in incrementDirIter()
498       if (EC || CurrentDirIter == directory_iterator()) {  in incrementImpl()
523   CombiningDirIterImpl(directory_iterator FirstIter, FileSystemPtr Fallback,  in CombiningDirIterImpl()
536 directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
538   return directory_iterator(  in dir_begin()
954 directory_iterator InMemoryFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
959     return directory_iterator(std::make_shared<InMemoryDirIterator>());  in dir_begin()
963     return directory_iterator(  in dir_begin()
967   return directory_iterator(std::make_shared<InMemoryDirIterator>());  in dir_begin()
1100   llvm::vfs::directory_iterator ExternalIter;
1104                                 llvm::vfs::directory_iterator ExtIter)  in RedirectingFSDirRemapIterImpl()
1107     if (ExternalIter != llvm::vfs::directory_iterator())  in RedirectingFSDirRemapIterImpl()
1125     if (!EC && ExternalIter != llvm::vfs::directory_iterator())  in increment()
1192 directory_iterator RedirectingFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1225   directory_iterator DirIter;  in dir_begin()
1233           directory_iterator(std::make_shared<RedirectingFSDirRemapIterImpl>(  in dir_begin()
1238     DirIter = directory_iterator(std::make_shared<RedirectingFSDirIterImpl>(  in dir_begin()
1244   return directory_iterator(std::make_shared<CombiningDirIterImpl>(  in dir_begin()
2340   directory_iterator I = FS->dir_begin(Path, EC);  in recursive_directory_iterator()
2341   if (I != directory_iterator()) {  in recursive_directory_iterator()
2351   vfs::directory_iterator End;  in increment()
2357       vfs::directory_iterator I = FS->dir_begin(State->Stack.top()->path(), EC);  in increment()