mirror of git://gcc.gnu.org/git/gcc.git
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// Copyright (C) 2017-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do compile { target c++11 } }
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#include <memory>
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using std::is_same;
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template<typename T, typename U>
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using Rebind = typename std::pointer_traits<T>::template rebind<U>;
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template<typename T>
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struct HasRebind {
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template<typename U> using rebind = U*;
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};
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static_assert(is_same<Rebind<HasRebind<int>, long>,
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long*>::value,
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"nested alias template is used");
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template<typename T> struct NoRebind0 { };
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static_assert(is_same<Rebind<NoRebind0<int>, long>,
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NoRebind0<long>>::value,
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"first template argument is replaced");
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template<typename T, typename> struct NoRebind1 { };
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static_assert(is_same<Rebind<NoRebind1<int, void>, long>,
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NoRebind1<long, void>>::value,
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"first template argument is replaced");
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template<typename T, typename, typename> struct NoRebind2 { };
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static_assert(is_same<Rebind<NoRebind2<int, void, void>, long>,
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NoRebind2<long, void, void>>::value,
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"first template argument is replaced");
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template<typename T, typename...> struct NoRebindN { };
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static_assert(is_same<Rebind<NoRebindN<int>, long>,
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NoRebindN<long>>::value,
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"first template argument is replaced");
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static_assert(is_same<Rebind<NoRebindN<int, void>, long>,
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NoRebindN<long, void>>::value,
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"first template argument is replaced");
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template<typename T, int = 0>
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struct CannotRebind {
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using element_type = T;
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};
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// PR libstdc++/72793 specialization of pointer_traits is still well-formed:
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std::pointer_traits<CannotRebind<int>>::element_type e;
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