[PATCH] Pure and const attributes for builtins

[Roger Sayle]

Hi Jason,
> I've meant for a while to extend the nothrow_libfn_p functionality in the
> C++ frontend to cover the other builtin attributes in order to get the lazy
> handling Joseph talks about, but haven't gotten around to it.  I would
> think that doing so would be straightforward.

That sounds like an excellent idea.  I think I'm about to embark upon
a major overhaul of the way builtin attributes are implemented, based
on my recent discussions with Joseph.  Looking at cp/cfns.gperf and
associated code,  it would seem this section of the compiler could also
be modernized during the process, by adding the C++ function attribute
"nothrow" that can be applied by default to the appropriate standard C
library functions.

Is there any other related functionality that I shoud be aware of?

Roger
--
Roger Sayle,                         E-mail: roger@eyesopen.com
OpenEye Scientific Software,         WWW: http://www.eyesopen.com/
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