// Uses-allocator Construction -*- C++ -*-
-// Copyright (C) 2010-2013 Free Software Foundation, Inc.
+// Copyright (C) 2010-2014 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
template<typename _Tp, typename _Alloc,
bool = __has_allocator_type<_Tp>::value>
struct __uses_allocator_helper
- : public false_type { };
+ : false_type { };
template<typename _Tp, typename _Alloc>
struct __uses_allocator_helper<_Tp, _Alloc, true>
- : public integral_constant<bool, is_convertible<_Alloc,
- typename _Tp::allocator_type>::value>
+ : is_convertible<_Alloc, typename _Tp::allocator_type>::type
{ };
/// [allocator.uses.trait]
template<typename _Tp, typename _Alloc>
struct uses_allocator
- : public integral_constant<bool,
- __uses_allocator_helper<_Tp, _Alloc>::value>
+ : __uses_allocator_helper<_Tp, _Alloc>::type
{ };
- template<typename _Tp, typename _Alloc, typename... _Args>
- struct __uses_allocator_arg
- : is_constructible<_Tp, _Alloc, _Args...>
- { static_assert( uses_allocator<_Tp, _Alloc>::value, "uses allocator" ); };
-
struct __uses_alloc_base { };
+
struct __uses_alloc0 : __uses_alloc_base
- { struct _Anything { _Anything(...) { } } _M_a; };
+ {
+ struct _Sink { void operator=(const void*) { } } _M_a;
+ };
+
template<typename _Alloc>
struct __uses_alloc1 : __uses_alloc_base { const _Alloc* _M_a; };
+
template<typename _Alloc>
struct __uses_alloc2 : __uses_alloc_base { const _Alloc* _M_a; };
- template<bool, typename _Alloc, typename... _Args>
+ template<bool, typename _Tp, typename _Alloc, typename... _Args>
struct __uses_alloc;
template<typename _Tp, typename _Alloc, typename... _Args>
: __uses_alloc0 { };
template<typename _Tp, typename _Alloc, typename... _Args>
- struct __uses_alloc_impl
- : __uses_alloc<uses_allocator<_Tp, _Alloc>::value, _Tp, _Alloc, _Args...>
- { };
+ using __uses_alloc_t =
+ __uses_alloc<uses_allocator<_Tp, _Alloc>::value, _Tp, _Alloc, _Args...>;
template<typename _Tp, typename _Alloc, typename... _Args>
- __uses_alloc_impl<_Tp, _Alloc, _Args...>
+ inline __uses_alloc_t<_Tp, _Alloc, _Args...>
__use_alloc(const _Alloc& __a)
{
- __uses_alloc_impl<_Tp, _Alloc, _Args...> __ret;
+ __uses_alloc_t<_Tp, _Alloc, _Args...> __ret;
__ret._M_a = &__a;
return __ret;
}