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// Copyright (C) 2017-2018 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-do compile { target c++11 } }
#include <memory>
using std::is_same;
template<typename T, typename U>
using Rebind = typename std::pointer_traits<T>::template rebind<U>;
template<typename T>
struct HasRebind {
template<typename U> using rebind = U*;
};
static_assert(is_same<Rebind<HasRebind<int>, long>,
long*>::value,
"nested alias template is used");
template<typename T> struct NoRebind0 { };
static_assert(is_same<Rebind<NoRebind0<int>, long>,
NoRebind0<long>>::value,
"first template argument is replaced");
template<typename T, typename> struct NoRebind1 { };
static_assert(is_same<Rebind<NoRebind1<int, void>, long>,
NoRebind1<long, void>>::value,
"first template argument is replaced");
template<typename T, typename, typename> struct NoRebind2 { };
static_assert(is_same<Rebind<NoRebind2<int, void, void>, long>,
NoRebind2<long, void, void>>::value,
"first template argument is replaced");
template<typename T, typename...> struct NoRebindN { };
static_assert(is_same<Rebind<NoRebindN<int>, long>,
NoRebindN<long>>::value,
"first template argument is replaced");
static_assert(is_same<Rebind<NoRebindN<int, void>, long>,
NoRebindN<long, void>>::value,
"first template argument is replaced");
template<typename T, int = 0>
struct CannotRebind {
using element_type = T;
};
// PR libstdc++/72793 specialization of pointer_traits is still well-formed:
std::pointer_traits<CannotRebind<int>>::element_type e;
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