a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// template <class Alloc>
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// struct allocator_traits
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// {
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// template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>;
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// ...
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// };
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#include <memory>
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#include <type_traits>
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template <class T>
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struct ReboundA {};
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template <class T>
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struct A
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{
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typedef T value_type;
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template <class U> struct rebind {typedef ReboundA<U> other;};
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};
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template <class T, class U>
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struct ReboundB {};
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template <class T, class U>
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struct B
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{
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typedef T value_type;
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template <class V> struct rebind {typedef ReboundB<V, U> other;};
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};
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template <class T>
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struct C
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{
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typedef T value_type;
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};
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template <class T, class U>
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struct D
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{
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typedef T value_type;
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};
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template <class T>
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struct E
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{
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typedef T value_type;
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template <class U> struct rebind {typedef ReboundA<U> otter;};
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};
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int main()
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{
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#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
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static_assert((std::is_same<std::allocator_traits<A<char> >::rebind_traits<double>, std::allocator_traits<ReboundA<double> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<B<int, char> >::rebind_traits<double>, std::allocator_traits<ReboundB<double, char> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<C<char> >::rebind_traits<double>, std::allocator_traits<C<double> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<D<int, char> >::rebind_traits<double>, std::allocator_traits<D<double, char> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<E<char> >::rebind_traits<double>, std::allocator_traits<E<double> > >::value), "");
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#else // _LIBCPP_HAS_NO_TEMPLATE_ALIASES
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static_assert((std::is_same<std::allocator_traits<A<char> >::rebind_traits<double>::other, std::allocator_traits<ReboundA<double> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<B<int, char> >::rebind_traits<double>::other, std::allocator_traits<ReboundB<double, char> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<C<char> >::rebind_traits<double>::other, std::allocator_traits<C<double> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<D<int, char> >::rebind_traits<double>::other, std::allocator_traits<D<double, char> > >::value), "");
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static_assert((std::is_same<std::allocator_traits<E<char> >::rebind_traits<double>::other, std::allocator_traits<E<double> > >::value), "");
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#endif // _LIBCPP_HAS_NO_TEMPLATE_ALIASES
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}
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