[cfe-commits] [PATCH] Use color for -ast-dump-filter only when it is supported

[Philip Craig]

  Sorry I didn't explain that well. The -fcolor-diagnostics needs to be able to override the simple automatic detection. And actually it uses a different test from has_color. See lib/Driver/Tools.cpp:2903. I agree that there is potential to clean this up some (eg by storing the ShowColors flag in the raw_ostream), but I think that should be separate from this patch.

http://llvm-reviews.chandlerc.com/D127