Lift VFS from clang to llvm (NFC)

This patch moves the virtual file system form clang to llvm so it can be
used by more projects.

Concretely the patch:
 - Moves VirtualFileSystem.{h|cpp} from clang/Basic to llvm/Support.
 - Moves the corresponding unit test from clang to llvm.
 - Moves the vfs namespace from clang::vfs to llvm::vfs.
 - Formats the lines affected by this change, mostly this is the result of
   the added llvm namespace.

RFC on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-October/126657.html

Differential revision: https://reviews.llvm.org/D52783

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@344140 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 5 deletions

diff --git a/unittests/Basic/FileManagerTest.cpp b/unittests/Basic/FileManagerTest.cpp
index 52cb5b2f0d..309de47949 100644
--- a/unittests/Basic/FileManagerTest.cpp
+++ b/unittests/Basic/FileManagerTest.cpp
@@ -10,9 +10,9 @@
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/FileSystemOptions.h"
 #include "clang/Basic/FileSystemStatCache.h"
-#include "clang/Basic/VirtualFileSystem.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/VirtualFileSystem.h"
 #include "gtest/gtest.h"
 
 using namespace llvm;
@@ -60,8 +60,8 @@ public:
 
   // Implement FileSystemStatCache::getStat().
   LookupResult getStat(StringRef Path, FileData &Data, bool isFile,
-                       std::unique_ptr<vfs::File> *F,
-                       vfs::FileSystem &FS) override {
+                       std::unique_ptr<llvm::vfs::File> *F,
+                       llvm::vfs::FileSystem &FS) override {
 #ifndef _WIN32
     SmallString<128> NormalizedPath(Path);
     llvm::sys::path::native(NormalizedPath);
@@ -305,8 +305,8 @@ TEST_F(FileManagerTest, makeAbsoluteUsesVFS) {
 #endif
   llvm::sys::path::append(CustomWorkingDir, "some", "weird", "path");
 
-  auto FS =
-      IntrusiveRefCntPtr<vfs::InMemoryFileSystem>(new vfs::InMemoryFileSystem);
+  auto FS = IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem>(
+      new llvm::vfs::InMemoryFileSystem);
   // setCurrentworkingdirectory must finish without error.
   ASSERT_TRUE(!FS->setCurrentWorkingDirectory(CustomWorkingDir));