tree bd96a24447cf5a504d84556ed129f6366f2fae2d
parent 37cafb077ad5b170acae77e566638603011ef4c0
author Douglas Gregor <dgregor@apple.com> 1268693692 +0000
committer Douglas Gregor <dgregor@apple.com> 1268693692 +0000

Introduce a new BufferResult class to act as the return type of
SourceManager's getBuffer() (and similar) operations. This abstract
can be used to force callers to cope with errors in getBuffer(), such
as missing files and changed files. Fix a bunch of callers to use the
new interface.

Add some very basic checks for file consistency (file size,
modification time) into ContentCache::getBuffer(), although these
checks don't help much until we've updated the main callers (e.g.,
SourceManager::getSpelling()).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98585 91177308-0d34-0410-b5e6-96231b3b80d8