[PATCH] New predicate covering NOP_EXPR and CONVERT_EXPR

[Mark Mitchell]

Giovanni Bajo wrote:

> I think Mark mentioned that he was working on a C++-specific cxx_fold() that
> was able to do constant expression folding as allowed by the C++ rules
> (which is exactly what we need, and nothing more). Not sure if that patch
> ever finished.

I don't think I ever even really started it, though it's certainly a
good idea!  I certainly don't have it in my active queue.

-- 
Mark Mitchell
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