From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 20 Sep 2017 22:03:37 +0000 (+0100)
Subject: PR libstdc++/79162 Fix std::string regression due to LWG 2946 (old ABI)
X-Git-Tag: upstream/12.2.0~36837
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9d2bac69bcbf4715b353c91485f0afb52513e88d;p=platform%2Fupstream%2Fgcc.git

PR libstdc++/79162 Fix std::string regression due to LWG 2946 (old ABI)

	PR libstdc++/79162
	* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
	(basic_string::_If_sv): Remove from the overload set when the
	argument is derived from basic_string.

From-SVN: r253035
---

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index ceb883e..9be1db7 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,6 +1,11 @@
 2017-09-20  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/79162
+	* include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
+	(basic_string::_If_sv): Remove from the overload set when the
+	argument is derived from basic_string.
+
+	PR libstdc++/79162
 	* include/bits/basic_string.h (basic_string::_If_sv): Remove from the
 	overload set when the argument is derived from basic_string.
 	* testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc: New
diff --git a/libstdc++-v3/include/bits/basic_string.h b/libstdc++-v3/include/bits/basic_string.h
index 8a382d5..a4b81137 100644
--- a/libstdc++-v3/include/bits/basic_string.h
+++ b/libstdc++-v3/include/bits/basic_string.h
@@ -3439,6 +3439,7 @@ _GLIBCXX_END_NAMESPACE_CXX11
       template<typename _Tp, typename _Res>
 	using _If_sv = enable_if_t<
 	  __and_<is_convertible<const _Tp&, __sv_type>,
+		 __not_<is_convertible<const _Tp*, const basic_string*>>,
 		 __not_<is_convertible<const _Tp&, const _CharT*>>>::value,
 	  _Res>;