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[PATCH] PR libstdc++/79162 disambiguate assignment from string_view

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: Tue, 14 Mar 2017 14:52:32 +0000
Subject: [PATCH] PR libstdc++/79162 disambiguate assignment from string_view
Authentication-results: sourceware.org; auth=none

This fixes a new ambiguity in C++17 mode introduced by string_view
support in basic_string.

	PR libstdc++/79162
	* include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI]
	(basic_string<C,T,A>::operator=(basic_string_view<C,T>)): Replace
	with a constrained template.
	[!_GLIBCXX_USE_CXX11_ABI]
	(basic_string<C,T,A>::operator=(basic_string_view<C,T>)): Likewise.
	* testsuite/21_strings/basic_string/cons/char/79162.cc: New test.
	* testsuite/21_strings/basic_string/cons/wchar_t/79162.cc: New test.

Tested ppc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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