Comment parsing: couple TextTokenRetokenizer and comment parser together to
remove one of the two variable-length lookahead buffers.  Now retokenizer will
ask for more tokens when it needs them.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160680 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed