RFC: PATCH to adjust libcpp raw string support for N3077 changes

[Jakub Jelinek]

On Fri, Mar 26, 2010 at 05:45:10PM -0400, Jason Merrill wrote:
> At the Pittsburgh meeting earlier this month, the committee approved
> several significant changes to raw strings:
> 
> 1) Making them truly raw by reverting any transformations of
> extended characters/UCNs, trigraphs or backslash/newline.
> 2) Avoiding other trigraph issues by changing the inner delimiters
> from [] to ().
> 3) Avoiding UCN issues in the delimiters by prohibiting '\'.
> 
> I think we really want at least #2 in 4.5, preferably all 3, as it
> will be the first release with raw string support.

I think we want all 3 in 4.5.

	Jakub