[PATCH] rvalue reference implementation for C++0x

Andrew Pinski pinskia@gmail.com
Sun Mar 11 03:35:00 GMT 2007


On 3/10/07, Russell Yanofsky <russ@yanofsky.org> wrote:
> It seems to me like everything you said is already implemented. Rvalue
> reference types become part of the TYPE_NEXT_REF_TO chain just like
> other variants of reference types. And build_reference_type() is the
> front-end wrapper for the build_reference_type_for_mode() function.

Really I don't think you should be touching middle-end code to do
support this feature because this is a very specific reference type to
C++ in the same way lvalues are speficic to the front-ends.

Also what does C++0x say about the aliasing sets of rvalue reference
type vs the reference type are they the same or can they be different?
I think it is better to create a new type in the C++ front-end and
mirror what is done building reference type but have a hash table
instead of using TYPE_REFERENCE_TO (really that code should be changed
to use a hash table instead of an extra field in the type anyways).
And during gimplification lower the type down to the reference type.

Thanks,
Andrew Pinski



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