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// 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-do compile { target c++11 } }
#include <memory>
using std::is_same;
template<typename T, typename U>
using Rebind = typename std::allocator_traits<T>::template rebind_alloc<U>;
template<typename T>
struct HasRebind {
using value_type = T;
template<typename U> struct rebind { using other = std::allocator<U>; };
};
static_assert(is_same<Rebind<HasRebind<int>, long>,
std::allocator<long>>::value,
"nested alias template is used");
template<typename T>
struct NoRebind0 {
using value_type = T;
};
static_assert(is_same<Rebind<NoRebind0<int>, long>,
NoRebind0<long>>::value,
"first template argument is replaced");
template<typename T, typename>
struct NoRebind1 {
using value_type = T;
};
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 {
using value_type = T;
};
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 {
using value_type = T;
};
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 value_type = T;
};
// PR libstdc++/72792 specialization of allocator_traits is still well-formed:
std::allocator_traits<CannotRebind<int>>::value_type v;
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