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[PATCH] Tweak static assertions in std::optional

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, 8 May 2017 18:15:26 +0100
Subject: [PATCH] Tweak static assertions in std::optional
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This simplifies the conditions of some static assertions, using one
assertion per condition instead of asserting the conjunction. This
means we don't need any string literal, because the conditions are
quite readable now.

	* include/std/optional: Use a separate static_assert per condition.
	* testsuite/20_util/optional/cons/value_neg.cc: Update dg-error line
	numbers.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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