ioeric created this revision.
ioeric added reviewers: ilya-biryukov, sammccall.
Herald added a subscriber: cfe-commits.
This is useful when derived file systems want to override some calls
and still proxy other calls.
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 +335,41 @@
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:
+ ProxyFileSystem(IntrusiveRefCntPtr<FileSystem> FS) : FS(std::move(FS)) {}
+
+ virtual llvm::ErrorOr<Status> status(const Twine &Path) override {
+ return FS->status(Path);
+ }
+ virtual llvm::ErrorOr<std::unique_ptr<File>>
+ openFileForRead(const Twine &Path) override {
+ return FS->openFileForRead(Path);
+ }
+ virtual directory_iterator dir_begin(const Twine &Dir,
+ std::error_code &EC) override {
+ return FS->dir_begin(Dir, EC);
+ }
+ virtual llvm::ErrorOr<std::string>
+ getCurrentWorkingDirectory() const override {
+ return FS->getCurrentWorkingDirectory();
+ }
+ virtual std::error_code
+ setCurrentWorkingDirectory(const Twine &Path) override {
+ return FS->setCurrentWorkingDirectory(Path);
+ }
+ virtual std::error_code getRealPath(const Twine &Path,
+ SmallVectorImpl<char> &Output) const override {
+ return FS->getRealPath(Path, Output);
+ }
+
+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 +335,41 @@
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:
+ ProxyFileSystem(IntrusiveRefCntPtr<FileSystem> FS) : FS(std::move(FS)) {}
+
+ virtual llvm::ErrorOr<Status> status(const Twine &Path) override {
+ return FS->status(Path);
+ }
+ virtual llvm::ErrorOr<std::unique_ptr<File>>
+ openFileForRead(const Twine &Path) override {
+ return FS->openFileForRead(Path);
+ }
+ virtual directory_iterator dir_begin(const Twine &Dir,
+ std::error_code &EC) override {
+ return FS->dir_begin(Dir, EC);
+ }
+ virtual llvm::ErrorOr<std::string>
+ getCurrentWorkingDirectory() const override {
+ return FS->getCurrentWorkingDirectory();
+ }
+ virtual std::error_code
+ setCurrentWorkingDirectory(const Twine &Path) override {
+ return FS->setCurrentWorkingDirectory(Path);
+ }
+ virtual std::error_code getRealPath(const Twine &Path,
+ SmallVectorImpl<char> &Output) const override {
+ return FS->getRealPath(Path, Output);
+ }
+
+private:
+ IntrusiveRefCntPtr<FileSystem> FS;
+};
+
namespace detail {
class InMemoryDirectory;
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