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[PATCH] Define std::gcd and std::lcm for C++17

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Mon, 3 Oct 2016 18:01:02 +0100
Subject: [PATCH] Define std::gcd and std::lcm for C++17
Authentication-results: sourceware.org; auth=none

This shares the code for std::gcd and std::experimental::gcd, and
similarly for lcm.

I realised I'd mixed up the gcd.cc and lcm.cc tests so this patch also
swaps them around.

	* doc/xml/manual/status_cxx2017.xml: Update gcd/lcm status.
	* doc/html/*: Regenerate.
	* include/experimental/numeric (__abs): Move to <numeric>.
	(gcd, lcm): Use __detail::gcd and __detail::lcm.
	* include/std/numeric (__detail::__abs_integral)
	(__detail::__gcd, __detail::__lcm): Define.
	(gcd, lcm): Define for C++17.
	* testsuite/26_numerics/gcd/1.cc: New test.
	* testsuite/26_numerics/lcm/1.cc: New test.
	* testsuite/experimental/numeric/gcd.cc: Swap contents with ...
	* testsuite/experimental/numeric/lcd.cc: ... this.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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