[VFS] Add a proxy FS that delegates calls to underlying FS by default.
authorEric Liu <ioeric@google.com>
Tue, 25 Sep 2018 14:02:01 +0000 (14:02 +0000)
committerEric Liu <ioeric@google.com>
Tue, 25 Sep 2018 14:02:01 +0000 (14:02 +0000)
commit0da443556d34c503129e1ae26f5c291a2dff228f
tree8b74a786f83e0bfaa24e9e6f0913197c0684246d
parent86baebc5fdfebb1fe62d2180bbbfa57edbd016d1
[VFS] Add a proxy FS that delegates calls to underlying FS by default.

Summary:
This is useful when derived file systems want to override some calls
and still proxy other calls.

Reviewers: ilya-biryukov, sammccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D52462

llvm-svn: 342976
clang/include/clang/Basic/VirtualFileSystem.h