+2017-11-30 Glen Joseph Fernandes <glenjofe@gmail.com>
+
+ * include/bits/ptr_traits.h (__to_address, to_address): Move static
+ assertion.
+ * testsuite/20_util/to_address/1_neg.cc: New test.
+
2017-11-30 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83226
template<typename _Tp>
constexpr _Tp*
__to_address(_Tp* __ptr) noexcept
- { return __ptr; }
+ {
+ static_assert(!std::is_function<_Tp>::value, "not a function pointer");
+ return __ptr;
+ }
#if __cplusplus <= 201703L
template<typename _Ptr>
template<typename _Tp>
constexpr _Tp*
to_address(_Tp* __ptr) noexcept
- {
- static_assert(!std::is_function_v<_Tp>, "not a pointer to function");
- return __ptr;
- }
+ { return std::__to_address(__ptr); }
/**
* @brief Obtain address referenced by a pointer to an object
--- /dev/null
+// Copyright (C) 2017 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 } }
+// { dg-error "not a function pointer" "" { target *-*-* } 153 }
+
+#include <memory>
+
+struct P
+{
+ using element_type = void();
+
+ element_type* operator->() const noexcept
+ { return nullptr; }
+};
+
+void test01()
+{
+ P p;
+ std::to_address(p); // { dg-error "required from here" }
+}