[PATCH] Colored syntax highlighting for llvm-dwarfdump.

[Adrian Prantl]

In http://reviews.llvm.org/D6852#105642, @echristo wrote:

> Definitely want it.
>
> Two things:
>
> a) Might want to make it an option?


With this implementation colorizing is depending on the terminal type: Invoking llvm-dwarfdump results in color output, whereas llvm-dwarfdump | less will be monochrome.
The frontend provides an -fdiagnostics-color option that is on by default. We could do something similar here; If we do this; it should override the terminal detection, such that llvm-dwarfdump --color | less produces color output no matter what.

> b) Formatting for the SyntaxHighlighting.h file.

> 

> Is there any way we can piggy back more off the existing color support? (Not that this is complicated and I've not looked at it at all)


Is there more/better color support somewhere that we could re-use? I only looked at the AST dumper in clang so far, which just hardcodes the colors.


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