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Implement C++20 p1424 - 'constexpr' feature macro concerns.


The latest draft and I guess the above paper changed the macro names for the C++20 constexpr lib featues.

__cpp_lib_constexpr_algorithms ->__cpp_lib_constexpr.

This patch changes the name but not the date because I still have some work to do before I can ship the "miscellaneous" constexpr material.

I would like to slot this patch in before that chunk 3 of the constexpr lib patch set rather than wait because it simplifies the testing of macros somewhat.

I would also like to kill a non-standard macro pretty quickly.

It is a trivial patch really and it built and tested cleanly on x86_64-linux.

Ok for mainline?

Ed


Attachment: CL_cpp_lib_constexpr
Description: Text document

Attachment: patch_cpp_lib_constexpr
Description: Text document


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