200   directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override;
253   llvm::sys::fs::directory_iterator Iter;
257     if (!EC && Iter != llvm::sys::fs::directory_iterator()) {  in RealFSDirIter()
270     } else if (Iter == llvm::sys::fs::directory_iterator()) {  in increment()
282 directory_iterator RealFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
284   return directory_iterator(std::make_shared<RealFSDirIter>(Dir, EC));  in dir_begin()
342   directory_iterator CurrentDirIter;
353       if (CurrentDirIter != directory_iterator())  in incrementFS()
360     assert((IsFirstTime || CurrentDirIter != directory_iterator()) &&  in incrementDirIter()
365     if (!EC && CurrentDirIter == directory_iterator())  in incrementDirIter()
373       if (EC || CurrentDirIter == directory_iterator()) {  in incrementImpl()
397 directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
399   return directory_iterator(  in dir_begin()
664 directory_iterator InMemoryFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
669     return directory_iterator(std::make_shared<InMemoryDirIterator>());  in dir_begin()
673     return directory_iterator(std::make_shared<InMemoryDirIterator>(*DirNode));  in dir_begin()
676   return directory_iterator(std::make_shared<InMemoryDirIterator>());  in dir_begin()
910   directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override{  in dir_begin()
914       return directory_iterator();  in dir_begin()
919       return directory_iterator();  in dir_begin()
924       return directory_iterator();  in dir_begin()
928     return directory_iterator(std::make_shared<VFSFromYamlDirIterImpl>(Dir,  in dir_begin()
1789   directory_iterator I = FS->dir_begin(Path, EC);  in recursive_directory_iterator()
1790   if (!EC && I != directory_iterator()) {  in recursive_directory_iterator()
1800   vfs::directory_iterator End;  in increment()
1802     vfs::directory_iterator I = FS->dir_begin(State->top()->getName(), EC);  in increment()