Implement UCN support for C string literals (C99 6.4.3) and add some very basic tests. Chris Goller has graciously offered to write some test to help validate UCN support.

From a front-end perspective, I believe this code should work for ObjC @-strings. At the moment, I believe we need to tweak the code generation for @-strings (which doesn't appear to handle them). Will be investigating.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68076 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed