mirror of git://gcc.gnu.org/git/gcc.git
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
// 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::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;
|