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[PATCH] Implement constexpr std::addressof 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, 10 Oct 2016 16:34:31 +0100
Subject: [PATCH] Implement constexpr std::addressof for C++17
Authentication-results: sourceware.org; auth=none

Thank to the new __builtin_addressof that Jakub added we can do this
now.

	* doc/xml/manual/intro.xml: Document DR 2296 status.
	* doc/xml/manual/status_cxx2017.xml: Update status.
	* include/bits/move.h (__addressof): Add _GLIBCXX_CONSTEXPR and
	call __builtin_addressof.
	(addressof): Add _GLIBCXX17_CONSTEXPR.
	* testsuite/20_util/addressof/requirements/constexpr.cc: New test.
	* testsuite/20_util/forward/c_neg.cc: Adjust dg-error lineno.
	* testsuite/20_util/forward/f_neg.cc: Likewise.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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