* [committed] libstdc++: Fix noexcept-specifier for std::bind_front [PR 97101]
@ 2020-09-20 23:20 Jonathan Wakely
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From: Jonathan Wakely @ 2020-09-20 23:20 UTC (permalink / raw)
To: libstdc++, gcc-patches
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libstdc++-v3/ChangeLog:
PR libstdc++/97101
* include/std/functional (bind_front): Fix order of parameters
in is_nothrow_constructible_v specialization.
* testsuite/20_util/function_objects/bind_front/97101.cc: New test.
Tested powerpc64le-linux. Committed to trunk.
This should be backported to gcc-9 and gcc-10 too.
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commit 3c755b428e188228d0bad90625c995fd25a02322
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Mon Sep 21 00:17:02 2020
libstdc++: Fix noexcept-specifier for std::bind_front [PR 97101]
libstdc++-v3/ChangeLog:
PR libstdc++/97101
* include/std/functional (bind_front): Fix order of parameters
in is_nothrow_constructible_v specialization.
* testsuite/20_util/function_objects/bind_front/97101.cc: New test.
diff --git a/libstdc++-v3/include/std/functional b/libstdc++-v3/include/std/functional
index 124bdadd4c7..407b93f3eb7 100644
--- a/libstdc++-v3/include/std/functional
+++ b/libstdc++-v3/include/std/functional
@@ -905,8 +905,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Fn, typename... _Args>
constexpr _Bind_front_t<_Fn, _Args...>
bind_front(_Fn&& __fn, _Args&&... __args)
- noexcept(is_nothrow_constructible_v<int, _Bind_front_t<_Fn, _Args...>,
- _Fn, _Args...>)
+ noexcept(is_nothrow_constructible_v<_Bind_front_t<_Fn, _Args...>,
+ int, _Fn, _Args...>)
{
return _Bind_front_t<_Fn, _Args...>(0, std::forward<_Fn>(__fn),
std::forward<_Args>(__args)...);
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc
new file mode 100644
index 00000000000..b159eb02591
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc
@@ -0,0 +1,41 @@
+// Copyright (C) 2020 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do compile { target c++2a } }
+
+#include <functional>
+
+void
+test01()
+{
+ struct F1
+ {
+ void operator()() { }
+ };
+
+ struct F2
+ {
+ F2() = default;
+ F2(const F2&) noexcept(false) { }
+ void operator()() { }
+ };
+
+ // PR libstdc++/97101
+ static_assert( noexcept(std::bind_front(F1{})) );
+ static_assert( ! noexcept(std::bind_front(F2{})) );
+}
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