Lexing support for user-defined literals. Currently these lex as the same token
kinds as the underlying string literals, and we silently drop the ud-suffix;
those issues will be fixed by subsequent patches.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152012 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed