This revision was automatically updated to reflect the committed changes. Closed by commit rC342976: [VFS] Add a proxy FS that delegates calls to underlying FS by default. (authored by ioeric, committed by ).
Changed prior to commit: https://reviews.llvm.org/D52462?vs=166879&id=166882#toc Repository: rC Clang https://reviews.llvm.org/D52462 Files: include/clang/Basic/VirtualFileSystem.h Index: include/clang/Basic/VirtualFileSystem.h =================================================================== --- include/clang/Basic/VirtualFileSystem.h +++ include/clang/Basic/VirtualFileSystem.h @@ -335,6 +335,42 @@ const_iterator overlays_end() const { return FSList.rend(); } }; +/// By default, this delegates all calls to the underlying file system. This +/// is useful when derived file systems want to override some calls and still +/// proxy other calls. +class ProxyFileSystem : public FileSystem { +public: + explicit ProxyFileSystem(IntrusiveRefCntPtr<FileSystem> FS) + : FS(std::move(FS)) {} + + llvm::ErrorOr<Status> status(const Twine &Path) override { + return FS->status(Path); + } + llvm::ErrorOr<std::unique_ptr<File>> + openFileForRead(const Twine &Path) override { + return FS->openFileForRead(Path); + } + directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override { + return FS->dir_begin(Dir, EC); + } + llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override { + return FS->getCurrentWorkingDirectory(); + } + std::error_code setCurrentWorkingDirectory(const Twine &Path) override { + return FS->setCurrentWorkingDirectory(Path); + } + std::error_code getRealPath(const Twine &Path, + SmallVectorImpl<char> &Output) const override { + return FS->getRealPath(Path, Output); + } + +protected: + FileSystem &getUnderlyingFS() { return *FS; } + +private: + IntrusiveRefCntPtr<FileSystem> FS; +}; + namespace detail { class InMemoryDirectory;
Index: include/clang/Basic/VirtualFileSystem.h =================================================================== --- include/clang/Basic/VirtualFileSystem.h +++ include/clang/Basic/VirtualFileSystem.h @@ -335,6 +335,42 @@ const_iterator overlays_end() const { return FSList.rend(); } }; +/// By default, this delegates all calls to the underlying file system. This +/// is useful when derived file systems want to override some calls and still +/// proxy other calls. +class ProxyFileSystem : public FileSystem { +public: + explicit ProxyFileSystem(IntrusiveRefCntPtr<FileSystem> FS) + : FS(std::move(FS)) {} + + llvm::ErrorOr<Status> status(const Twine &Path) override { + return FS->status(Path); + } + llvm::ErrorOr<std::unique_ptr<File>> + openFileForRead(const Twine &Path) override { + return FS->openFileForRead(Path); + } + directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override { + return FS->dir_begin(Dir, EC); + } + llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override { + return FS->getCurrentWorkingDirectory(); + } + std::error_code setCurrentWorkingDirectory(const Twine &Path) override { + return FS->setCurrentWorkingDirectory(Path); + } + std::error_code getRealPath(const Twine &Path, + SmallVectorImpl<char> &Output) const override { + return FS->getRealPath(Path, Output); + } + +protected: + FileSystem &getUnderlyingFS() { return *FS; } + +private: + IntrusiveRefCntPtr<FileSystem> FS; +}; + namespace detail { class InMemoryDirectory;
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