diff options
Diffstat (limited to '8/sources/cxx-stl/gnu-libstdc++/4.7/include/type_traits')
| -rw-r--r-- | 8/sources/cxx-stl/gnu-libstdc++/4.7/include/type_traits | 1908 |
1 files changed, 1908 insertions, 0 deletions
diff --git a/8/sources/cxx-stl/gnu-libstdc++/4.7/include/type_traits b/8/sources/cxx-stl/gnu-libstdc++/4.7/include/type_traits new file mode 100644 index 0000000..7484693 --- /dev/null +++ b/8/sources/cxx-stl/gnu-libstdc++/4.7/include/type_traits @@ -0,0 +1,1908 @@ +// C++11 type_traits -*- C++ -*- + +// Copyright (C) 2007, 2008, 2009, 2010, 2011 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. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +/** @file include/type_traits + * This is a Standard C++ Library header. + */ + +#ifndef _GLIBCXX_TYPE_TRAITS +#define _GLIBCXX_TYPE_TRAITS 1 + +#pragma GCC system_header + +#ifndef __GXX_EXPERIMENTAL_CXX0X__ +# include <bits/c++0x_warning.h> +#else + +#include <bits/c++config.h> + +namespace std _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + /** + * @defgroup metaprogramming Metaprogramming and type traits + * @ingroup utilities + * + * Template utilities for compile-time introspection and modification, + * including type classification traits, type property inspection traits + * and type transformation traits. + * + * @{ + */ + + /// integral_constant + template<typename _Tp, _Tp __v> + struct integral_constant + { + static constexpr _Tp value = __v; + typedef _Tp value_type; + typedef integral_constant<_Tp, __v> type; + constexpr operator value_type() { return value; } + }; + + /// The type used as a compile-time boolean with true value. + typedef integral_constant<bool, true> true_type; + + /// The type used as a compile-time boolean with false value. + typedef integral_constant<bool, false> false_type; + + template<typename _Tp, _Tp __v> + constexpr _Tp integral_constant<_Tp, __v>::value; + + // Meta programming helper types. + + template<bool, typename, typename> + struct conditional; + + template<typename...> + struct __or_; + + template<> + struct __or_<> + : public false_type + { }; + + template<typename _B1> + struct __or_<_B1> + : public _B1 + { }; + + template<typename _B1, typename _B2> + struct __or_<_B1, _B2> + : public conditional<_B1::value, _B1, _B2>::type + { }; + + template<typename _B1, typename _B2, typename _B3, typename... _Bn> + struct __or_<_B1, _B2, _B3, _Bn...> + : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type + { }; + + template<typename...> + struct __and_; + + template<> + struct __and_<> + : public true_type + { }; + + template<typename _B1> + struct __and_<_B1> + : public _B1 + { }; + + template<typename _B1, typename _B2> + struct __and_<_B1, _B2> + : public conditional<_B1::value, _B2, _B1>::type + { }; + + template<typename _B1, typename _B2, typename _B3, typename... _Bn> + struct __and_<_B1, _B2, _B3, _Bn...> + : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type + { }; + + template<typename _Pp> + struct __not_ + : public integral_constant<bool, !_Pp::value> + { }; + + struct __sfinae_types + { + typedef char __one; + typedef struct { char __arr[2]; } __two; + }; + + // primary type categories. + + template<typename> + struct remove_cv; + + template<typename> + struct __is_void_helper + : public false_type { }; + + template<> + struct __is_void_helper<void> + : public true_type { }; + + /// is_void + template<typename _Tp> + struct is_void + : public integral_constant<bool, (__is_void_helper<typename + remove_cv<_Tp>::type>::value)> + { }; + + template<typename> + struct __is_integral_helper + : public false_type { }; + + template<> + struct __is_integral_helper<bool> + : public true_type { }; + + template<> + struct __is_integral_helper<char> + : public true_type { }; + + template<> + struct __is_integral_helper<signed char> + : public true_type { }; + + template<> + struct __is_integral_helper<unsigned char> + : public true_type { }; + +#ifdef _GLIBCXX_USE_WCHAR_T + template<> + struct __is_integral_helper<wchar_t> + : public true_type { }; +#endif + + template<> + struct __is_integral_helper<char16_t> + : public true_type { }; + + template<> + struct __is_integral_helper<char32_t> + : public true_type { }; + + template<> + struct __is_integral_helper<short> + : public true_type { }; + + template<> + struct __is_integral_helper<unsigned short> + : public true_type { }; + + template<> + struct __is_integral_helper<int> + : public true_type { }; + + template<> + struct __is_integral_helper<unsigned int> + : public true_type { }; + + template<> + struct __is_integral_helper<long> + : public true_type { }; + + template<> + struct __is_integral_helper<unsigned long> + : public true_type { }; + + template<> + struct __is_integral_helper<long long> + : public true_type { }; + + template<> + struct __is_integral_helper<unsigned long long> + : public true_type { }; + +#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128) + template<> + struct __is_integral_helper<__int128> + : public true_type { }; + + template<> + struct __is_integral_helper<unsigned __int128> + : public true_type { }; +#endif + + /// is_integral + template<typename _Tp> + struct is_integral + : public integral_constant<bool, (__is_integral_helper<typename + remove_cv<_Tp>::type>::value)> + { }; + + template<typename> + struct __is_floating_point_helper + : public false_type { }; + + template<> + struct __is_floating_point_helper<float> + : public true_type { }; + + template<> + struct __is_floating_point_helper<double> + : public true_type { }; + + template<> + struct __is_floating_point_helper<long double> + : public true_type { }; + +#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) + template<> + struct __is_floating_point_helper<__float128> + : public true_type { }; +#endif + + /// is_floating_point + template<typename _Tp> + struct is_floating_point + : public integral_constant<bool, (__is_floating_point_helper<typename + remove_cv<_Tp>::type>::value)> + { }; + + /// is_array + template<typename> + struct is_array + : public false_type { }; + + template<typename _Tp, std::size_t _Size> + struct is_array<_Tp[_Size]> + : public true_type { }; + + template<typename _Tp> + struct is_array<_Tp[]> + : public true_type { }; + + template<typename> + struct __is_pointer_helper + : public false_type { }; + + template<typename _Tp> + struct __is_pointer_helper<_Tp*> + : public true_type { }; + + /// is_pointer + template<typename _Tp> + struct is_pointer + : public integral_constant<bool, (__is_pointer_helper<typename + remove_cv<_Tp>::type>::value)> + { }; + + /// is_lvalue_reference + template<typename> + struct is_lvalue_reference + : public false_type { }; + + template<typename _Tp> + struct is_lvalue_reference<_Tp&> + : public true_type { }; + + /// is_rvalue_reference + template<typename> + struct is_rvalue_reference + : public false_type { }; + + template<typename _Tp> + struct is_rvalue_reference<_Tp&&> + : public true_type { }; + + template<typename> + struct is_function; + + template<typename> + struct __is_member_object_pointer_helper + : public false_type { }; + + template<typename _Tp, typename _Cp> + struct __is_member_object_pointer_helper<_Tp _Cp::*> + : public integral_constant<bool, !is_function<_Tp>::value> { }; + + /// is_member_object_pointer + template<typename _Tp> + struct is_member_object_pointer + : public integral_constant<bool, (__is_member_object_pointer_helper< + typename remove_cv<_Tp>::type>::value)> + { }; + + template<typename> + struct __is_member_function_pointer_helper + : public false_type { }; + + template<typename _Tp, typename _Cp> + struct __is_member_function_pointer_helper<_Tp _Cp::*> + : public integral_constant<bool, is_function<_Tp>::value> { }; + + /// is_member_function_pointer + template<typename _Tp> + struct is_member_function_pointer + : public integral_constant<bool, (__is_member_function_pointer_helper< + typename remove_cv<_Tp>::type>::value)> + { }; + + /// is_enum + template<typename _Tp> + struct is_enum + : public integral_constant<bool, __is_enum(_Tp)> + { }; + + /// is_union + template<typename _Tp> + struct is_union + : public integral_constant<bool, __is_union(_Tp)> + { }; + + /// is_class + template<typename _Tp> + struct is_class + : public integral_constant<bool, __is_class(_Tp)> + { }; + + /// is_function + template<typename> + struct is_function + : public false_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes...)> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes......)> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes...) const> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes......) const> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes...) volatile> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes......) volatile> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes...) const volatile> + : public true_type { }; + + template<typename _Res, typename... _ArgTypes> + struct is_function<_Res(_ArgTypes......) const volatile> + : public true_type { }; + + template<typename> + struct __is_nullptr_t_helper + : public false_type { }; + + template<> + struct __is_nullptr_t_helper<std::nullptr_t> + : public true_type { }; + + // __is_nullptr_t (extension). + template<typename _Tp> + struct __is_nullptr_t + : public integral_constant<bool, (__is_nullptr_t_helper<typename + remove_cv<_Tp>::type>::value)> + { }; + + // composite type categories. + + /// is_reference + template<typename _Tp> + struct is_reference + : public __or_<is_lvalue_reference<_Tp>, + is_rvalue_reference<_Tp>>::type + { }; + + /// is_arithmetic + template<typename _Tp> + struct is_arithmetic + : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type + { }; + + /// is_fundamental + template<typename _Tp> + struct is_fundamental + : public __or_<is_arithmetic<_Tp>, is_void<_Tp>>::type + { }; + + /// is_object + template<typename _Tp> + struct is_object + : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, + is_void<_Tp>>>::type + { }; + + template<typename> + struct is_member_pointer; + + /// is_scalar + template<typename _Tp> + struct is_scalar + : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, + is_member_pointer<_Tp>, __is_nullptr_t<_Tp>>::type + { }; + + /// is_compound + template<typename _Tp> + struct is_compound + : public integral_constant<bool, !is_fundamental<_Tp>::value> { }; + + template<typename _Tp> + struct __is_member_pointer_helper + : public false_type { }; + + template<typename _Tp, typename _Cp> + struct __is_member_pointer_helper<_Tp _Cp::*> + : public true_type { }; + + /// is_member_pointer + template<typename _Tp> + struct is_member_pointer + : public integral_constant<bool, (__is_member_pointer_helper< + typename remove_cv<_Tp>::type>::value)> + { }; + + // type properties. + + /// is_const + template<typename> + struct is_const + : public false_type { }; + + template<typename _Tp> + struct is_const<_Tp const> + : public true_type { }; + + /// is_volatile + template<typename> + struct is_volatile + : public false_type { }; + + template<typename _Tp> + struct is_volatile<_Tp volatile> + : public true_type { }; + + /// is_trivial + template<typename _Tp> + struct is_trivial + : public integral_constant<bool, __is_trivial(_Tp)> + { }; + + // is_trivially_copyable (still unimplemented) + + /// is_standard_layout + template<typename _Tp> + struct is_standard_layout + : public integral_constant<bool, __is_standard_layout(_Tp)> + { }; + + /// is_pod + // Could use is_standard_layout && is_trivial instead of the builtin. + template<typename _Tp> + struct is_pod + : public integral_constant<bool, __is_pod(_Tp)> + { }; + + /// is_literal_type + template<typename _Tp> + struct is_literal_type + : public integral_constant<bool, __is_literal_type(_Tp)> + { }; + + /// is_empty + template<typename _Tp> + struct is_empty + : public integral_constant<bool, __is_empty(_Tp)> + { }; + + /// is_polymorphic + template<typename _Tp> + struct is_polymorphic + : public integral_constant<bool, __is_polymorphic(_Tp)> + { }; + + /// is_abstract + template<typename _Tp> + struct is_abstract + : public integral_constant<bool, __is_abstract(_Tp)> + { }; + + template<typename _Tp, + bool = is_integral<_Tp>::value, + bool = is_floating_point<_Tp>::value> + struct __is_signed_helper + : public false_type { }; + + template<typename _Tp> + struct __is_signed_helper<_Tp, false, true> + : public true_type { }; + + template<typename _Tp> + struct __is_signed_helper<_Tp, true, false> + : public integral_constant<bool, static_cast<bool>(_Tp(-1) < _Tp(0))> + { }; + + /// is_signed + template<typename _Tp> + struct is_signed + : public integral_constant<bool, __is_signed_helper<_Tp>::value> + { }; + + /// is_unsigned + template<typename _Tp> + struct is_unsigned + : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type + { }; + + + // destructible and constructible type properties + + template<typename> + struct add_rvalue_reference; + + /** + * @brief Utility to simplify expressions used in unevaluated operands + * @ingroup utilities + */ + template<typename _Tp> + typename add_rvalue_reference<_Tp>::type declval() noexcept; + + template<typename, unsigned = 0> + struct extent; + + template<typename> + struct remove_all_extents; + + template<typename _Tp> + struct __is_array_known_bounds + : public integral_constant<bool, (extent<_Tp>::value > 0)> + { }; + + template<typename _Tp> + struct __is_array_unknown_bounds + : public __and_<is_array<_Tp>, __not_<extent<_Tp>>>::type + { }; + + // In N3290 is_destructible does not say anything about function + // types and abstract types, see LWG 2049. This implementation + // describes function types as trivially nothrow destructible and + // abstract types as destructible, iff the explicit destructor + // call expression is wellformed. + struct __do_is_destructible_impl_1 + { + template<typename _Up> + struct __w { _Up __u; }; + + template<typename _Tp, typename + = decltype(declval<__w<_Tp>&>().~__w<_Tp>())> + static true_type __test(int); + + template<typename> + static false_type __test(...); + }; + + template<typename _Tp> + struct __is_destructible_impl_1 + : public __do_is_destructible_impl_1 + { + typedef decltype(__test<_Tp>(0)) type; + }; + + // Special implementation for abstract types + struct __do_is_destructible_impl_2 + { + template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> + static true_type __test(int); + + template<typename> + static false_type __test(...); + }; + + template<typename _Tp> + struct __is_destructible_impl_2 + : public __do_is_destructible_impl_2 + { + typedef decltype(__test<_Tp>(0)) type; + }; + + template<typename _Tp, + bool = __or_<is_void<_Tp>, + __is_array_unknown_bounds<_Tp>>::value, + bool = __or_<is_reference<_Tp>, is_function<_Tp>>::value> + struct __is_destructible_safe; + + template<typename _Tp> + struct __is_destructible_safe<_Tp, false, false> + : public conditional<is_abstract<_Tp>::value, + __is_destructible_impl_2<_Tp>, + __is_destructible_impl_1<_Tp>>::type::type + { }; + + template<typename _Tp> + struct __is_destructible_safe<_Tp, true, false> + : public false_type { }; + + template<typename _Tp> + struct __is_destructible_safe<_Tp, false, true> + : public true_type { }; + + /// is_destructible + template<typename _Tp> + struct is_destructible + : public integral_constant<bool, (__is_destructible_safe<_Tp>::value)> + { }; + + struct __do_is_default_constructible_impl + { + template<typename _Tp, typename = decltype(_Tp())> + static true_type __test(int); + + template<typename> + static false_type __test(...); + }; + + template<typename _Tp> + struct __is_default_constructible_impl + : public __do_is_default_constructible_impl + { + typedef decltype(__test<_Tp>(0)) type; + }; + + template<typename _Tp> + struct __is_default_constructible_atom + : public __and_<__not_<is_void<_Tp>>, + __is_default_constructible_impl<_Tp>>::type + { }; + + template<typename _Tp, bool = is_array<_Tp>::value> + struct __is_default_constructible_safe; + + // The following technique is a workaround for a current core language + // restriction, which does not allow for array types to occur in + // functional casts of the form T(). Complete arrays can be default- + // constructed, if the element type is default-constructible, but + // arrays with unknown bounds are not. + template<typename _Tp> + struct __is_default_constructible_safe<_Tp, true> + : public __and_<__is_array_known_bounds<_Tp>, + __is_default_constructible_atom<typename + remove_all_extents<_Tp>::type>>::type + { }; + + template<typename _Tp> + struct __is_default_constructible_safe<_Tp, false> + : public __is_default_constructible_atom<_Tp>::type + { }; + + /// is_default_constructible + template<typename _Tp> + struct is_default_constructible + : public integral_constant<bool, (__is_default_constructible_safe< + _Tp>::value)> + { }; + + + // Implementation of is_constructible. + + // The hardest part of this trait is the binary direct-initialization + // case, because we hit into a functional cast of the form T(arg). + // This implementation uses different strategies depending on the + // target type to reduce the test overhead as much as possible: + // + // a) For a reference target type, we use a static_cast expression + // modulo its extra cases. + // + // b) For a non-reference target type we use a ::new expression. + struct __do_is_static_castable_impl + { + template<typename _From, typename _To, typename + = decltype(static_cast<_To>(declval<_From>()))> + static true_type __test(int); + + template<typename, typename> + static false_type __test(...); + }; + + template<typename _From, typename _To> + struct __is_static_castable_impl + : public __do_is_static_castable_impl + { + typedef decltype(__test<_From, _To>(0)) type; + }; + + template<typename _From, typename _To> + struct __is_static_castable_safe + : public __is_static_castable_impl<_From, _To>::type + { }; + + // __is_static_castable + template<typename _From, typename _To> + struct __is_static_castable + : public integral_constant<bool, (__is_static_castable_safe< + _From, _To>::value)> + { }; + + // Implementation for non-reference types. To meet the proper + // variable definition semantics, we also need to test for + // is_destructible in this case. + // This form should be simplified by a single expression: + // ::delete ::new _Tp(declval<_Arg>()), see c++/51222. + struct __do_is_direct_constructible_impl + { + template<typename _Tp, typename _Arg, typename + = decltype(::new _Tp(declval<_Arg>()))> + static true_type __test(int); + + template<typename, typename> + static false_type __test(...); + }; + + template<typename _Tp, typename _Arg> + struct __is_direct_constructible_impl + : public __do_is_direct_constructible_impl + { + typedef decltype(__test<_Tp, _Arg>(0)) type; + }; + + template<typename _Tp, typename _Arg> + struct __is_direct_constructible_new_safe + : public __and_<is_destructible<_Tp>, + __is_direct_constructible_impl<_Tp, _Arg>>::type + { }; + + template<typename, typename> + struct is_same; + + template<typename, typename> + struct is_base_of; + + template<typename> + struct remove_reference; + + template<typename _From, typename _To, bool + = __not_<__or_<is_void<_From>, + is_function<_From>>>::value> + struct __is_base_to_derived_ref; + + // Detect whether we have a downcast situation during + // reference binding. + template<typename _From, typename _To> + struct __is_base_to_derived_ref<_From, _To, true> + { + typedef typename remove_cv<typename remove_reference<_From + >::type>::type __src_t; + typedef typename remove_cv<typename remove_reference<_To + >::type>::type __dst_t; + typedef __and_<__not_<is_same<__src_t, __dst_t>>, + is_base_of<__src_t, __dst_t>> type; + static constexpr bool value = type::value; + }; + + template<typename _From, typename _To> + struct __is_base_to_derived_ref<_From, _To, false> + : public false_type + { }; + + template<typename _From, typename _To, bool + = __and_<is_lvalue_reference<_From>, + is_rvalue_reference<_To>>::value> + struct __is_lvalue_to_rvalue_ref; + + // Detect whether we have an lvalue of non-function type + // bound to a reference-compatible rvalue-reference. + template<typename _From, typename _To> + struct __is_lvalue_to_rvalue_ref<_From, _To, true> + { + typedef typename remove_cv<typename remove_reference< + _From>::type>::type __src_t; + typedef typename remove_cv<typename remove_reference< + _To>::type>::type __dst_t; + typedef __and_<__not_<is_function<__src_t>>, + __or_<is_same<__src_t, __dst_t>, + is_base_of<__dst_t, __src_t>>> type; + static constexpr bool value = type::value; + }; + + template<typename _From, typename _To> + struct __is_lvalue_to_rvalue_ref<_From, _To, false> + : public false_type + { }; + + // Here we handle direct-initialization to a reference type as + // equivalent to a static_cast modulo overshooting conversions. + // These are restricted to the following conversions: + // a) A base class value to a derived class reference + // b) An lvalue to an rvalue-reference of reference-compatible + // types that are not functions + template<typename _Tp, typename _Arg> + struct __is_direct_constructible_ref_cast + : public __and_<__is_static_castable<_Arg, _Tp>, + __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, + __is_lvalue_to_rvalue_ref<_Arg, _Tp> + >>>::type + { }; + + template<typename _Tp, typename _Arg> + struct __is_direct_constructible_new + : public conditional<is_reference<_Tp>::value, + __is_direct_constructible_ref_cast<_Tp, _Arg>, + __is_direct_constructible_new_safe<_Tp, _Arg> + >::type + { }; + + template<typename _Tp, typename _Arg> + struct __is_direct_constructible + : public integral_constant<bool, (__is_direct_constructible_new< + _Tp, _Arg>::value)> + { }; + + // Since default-construction and binary direct-initialization have + // been handled separately, the implementation of the remaining + // n-ary construction cases is rather straightforward. We can use + // here a functional cast, because array types are excluded anyway + // and this form is never interpreted as a C cast. + struct __do_is_nary_constructible_impl + { + template<typename _Tp, typename... _Args, typename + = decltype(_Tp(declval<_Args>()...))> + static true_type __test(int); + + template<typename, typename...> + static false_type __test(...); + }; + + template<typename _Tp, typename... _Args> + struct __is_nary_constructible_impl + : public __do_is_nary_constructible_impl + { + typedef decltype(__test<_Tp, _Args...>(0)) type; + }; + + template<typename _Tp, typename... _Args> + struct __is_nary_constructible + : public __is_nary_constructible_impl<_Tp, _Args...>::type + { + static_assert(sizeof...(_Args) > 1, + "Only useful for > 1 arguments"); + }; + + template<typename _Tp, typename... _Args> + struct __is_constructible_impl + : public __is_nary_constructible<_Tp, _Args...> + { }; + + template<typename _Tp, typename _Arg> + struct __is_constructible_impl<_Tp, _Arg> + : public __is_direct_constructible<_Tp, _Arg> + { }; + + template<typename _Tp> + struct __is_constructible_impl<_Tp> + : public is_default_constructible<_Tp> + { }; + + /// is_constructible + template<typename _Tp, typename... _Args> + struct is_constructible + : public integral_constant<bool, (__is_constructible_impl<_Tp, + _Args...>::value)> + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_copy_constructible_impl; + + template<typename _Tp> + struct __is_copy_constructible_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_copy_constructible_impl<_Tp, false> + : public is_constructible<_Tp, const _Tp&> + { }; + + /// is_copy_constructible + template<typename _Tp> + struct is_copy_constructible + : public __is_copy_constructible_impl<_Tp> + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_move_constructible_impl; + + template<typename _Tp> + struct __is_move_constructible_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_move_constructible_impl<_Tp, false> + : public is_constructible<_Tp, _Tp&&> + { }; + + /// is_move_constructible + template<typename _Tp> + struct is_move_constructible + : public __is_move_constructible_impl<_Tp> + { }; + + template<typename _Tp> + struct __is_nt_default_constructible_atom + : public integral_constant<bool, noexcept(_Tp())> + { }; + + template<typename _Tp, bool = is_array<_Tp>::value> + struct __is_nt_default_constructible_impl; + + template<typename _Tp> + struct __is_nt_default_constructible_impl<_Tp, true> + : public __and_<__is_array_known_bounds<_Tp>, + __is_nt_default_constructible_atom<typename + remove_all_extents<_Tp>::type>>::type + { }; + + template<typename _Tp> + struct __is_nt_default_constructible_impl<_Tp, false> + : public __is_nt_default_constructible_atom<_Tp> + { }; + + /// is_nothrow_default_constructible + template<typename _Tp> + struct is_nothrow_default_constructible + : public __and_<is_default_constructible<_Tp>, + __is_nt_default_constructible_impl<_Tp>>::type + { }; + + template<typename _Tp, typename... _Args> + struct __is_nt_constructible_impl + : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> + { }; + + template<typename _Tp, typename _Arg> + struct __is_nt_constructible_impl<_Tp, _Arg> + : public integral_constant<bool, + noexcept(static_cast<_Tp>(declval<_Arg>()))> + { }; + + template<typename _Tp> + struct __is_nt_constructible_impl<_Tp> + : public is_nothrow_default_constructible<_Tp> + { }; + + /// is_nothrow_constructible + template<typename _Tp, typename... _Args> + struct is_nothrow_constructible + : public __and_<is_constructible<_Tp, _Args...>, + __is_nt_constructible_impl<_Tp, _Args...>>::type + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_nothrow_copy_constructible_impl; + + template<typename _Tp> + struct __is_nothrow_copy_constructible_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_nothrow_copy_constructible_impl<_Tp, false> + : public is_nothrow_constructible<_Tp, const _Tp&> + { }; + + /// is_nothrow_copy_constructible + template<typename _Tp> + struct is_nothrow_copy_constructible + : public __is_nothrow_copy_constructible_impl<_Tp> + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_nothrow_move_constructible_impl; + + template<typename _Tp> + struct __is_nothrow_move_constructible_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_nothrow_move_constructible_impl<_Tp, false> + : public is_nothrow_constructible<_Tp, _Tp&&> + { }; + + /// is_nothrow_move_constructible + template<typename _Tp> + struct is_nothrow_move_constructible + : public __is_nothrow_move_constructible_impl<_Tp> + { }; + + template<typename _Tp, typename _Up> + class __is_assignable_helper + : public __sfinae_types + { + template<typename _Tp1, typename _Up1> + static decltype(declval<_Tp1>() = declval<_Up1>(), __one()) + __test(int); + + template<typename, typename> + static __two __test(...); + + public: + static constexpr bool value = sizeof(__test<_Tp, _Up>(0)) == 1; + }; + + /// is_assignable + template<typename _Tp, typename _Up> + struct is_assignable + : public integral_constant<bool, + __is_assignable_helper<_Tp, _Up>::value> + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_copy_assignable_impl; + + template<typename _Tp> + struct __is_copy_assignable_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_copy_assignable_impl<_Tp, false> + : public is_assignable<_Tp&, const _Tp&> + { }; + + /// is_copy_assignable + template<typename _Tp> + struct is_copy_assignable + : public __is_copy_assignable_impl<_Tp> + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_move_assignable_impl; + + template<typename _Tp> + struct __is_move_assignable_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_move_assignable_impl<_Tp, false> + : public is_assignable<_Tp&, _Tp&&> + { }; + + /// is_move_assignable + template<typename _Tp> + struct is_move_assignable + : public __is_move_assignable_impl<_Tp> + { }; + + template<typename _Tp, typename _Up> + struct __is_nt_assignable_impl + : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> + { }; + + /// is_nothrow_assignable + template<typename _Tp, typename _Up> + struct is_nothrow_assignable + : public __and_<is_assignable<_Tp, _Up>, + __is_nt_assignable_impl<_Tp, _Up>>::type + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_nt_copy_assignable_impl; + + template<typename _Tp> + struct __is_nt_copy_assignable_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_nt_copy_assignable_impl<_Tp, false> + : public is_nothrow_assignable<_Tp&, const _Tp&> + { }; + + /// is_nothrow_copy_assignable + template<typename _Tp> + struct is_nothrow_copy_assignable + : public __is_nt_copy_assignable_impl<_Tp> + { }; + + template<typename _Tp, bool = is_void<_Tp>::value> + struct __is_nt_move_assignable_impl; + + template<typename _Tp> + struct __is_nt_move_assignable_impl<_Tp, true> + : public false_type { }; + + template<typename _Tp> + struct __is_nt_move_assignable_impl<_Tp, false> + : public is_nothrow_assignable<_Tp&, _Tp&&> + { }; + + /// is_nothrow_move_assignable + template<typename _Tp> + struct is_nothrow_move_assignable + : public __is_nt_move_assignable_impl<_Tp> + { }; + + /// has_trivial_default_constructor + template<typename _Tp> + struct has_trivial_default_constructor + : public integral_constant<bool, __has_trivial_constructor(_Tp)> + { }; + + /// has_trivial_copy_constructor + template<typename _Tp> + struct has_trivial_copy_constructor + : public integral_constant<bool, __has_trivial_copy(_Tp)> + { }; + + /// has_trivial_copy_assign + template<typename _Tp> + struct has_trivial_copy_assign + : public integral_constant<bool, __has_trivial_assign(_Tp)> + { }; + + /// has_trivial_destructor + template<typename _Tp> + struct has_trivial_destructor + : public integral_constant<bool, __has_trivial_destructor(_Tp)> + { }; + + /// has_virtual_destructor + template<typename _Tp> + struct has_virtual_destructor + : public integral_constant<bool, __has_virtual_destructor(_Tp)> + { }; + + + // type property queries. + + /// alignment_of + template<typename _Tp> + struct alignment_of + : public integral_constant<std::size_t, __alignof__(_Tp)> { }; + + /// rank + template<typename> + struct rank + : public integral_constant<std::size_t, 0> { }; + + template<typename _Tp, std::size_t _Size> + struct rank<_Tp[_Size]> + : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; + + template<typename _Tp> + struct rank<_Tp[]> + : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; + + /// extent + template<typename, unsigned _Uint> + struct extent + : public integral_constant<std::size_t, 0> { }; + + template<typename _Tp, unsigned _Uint, std::size_t _Size> + struct extent<_Tp[_Size], _Uint> + : public integral_constant<std::size_t, + _Uint == 0 ? _Size : extent<_Tp, + _Uint - 1>::value> + { }; + + template<typename _Tp, unsigned _Uint> + struct extent<_Tp[], _Uint> + : public integral_constant<std::size_t, + _Uint == 0 ? 0 : extent<_Tp, + _Uint - 1>::value> + { }; + + + // type relations. + + /// is_same + template<typename, typename> + struct is_same + : public false_type { }; + + template<typename _Tp> + struct is_same<_Tp, _Tp> + : public true_type { }; + + /// is_base_of + template<typename _Base, typename _Derived> + struct is_base_of + : public integral_constant<bool, __is_base_of(_Base, _Derived)> + { }; + + template<typename _From, typename _To, + bool = __or_<is_void<_From>, is_function<_To>, + is_array<_To>>::value> + struct __is_convertible_helper + { static constexpr bool value = is_void<_To>::value; }; + + template<typename _From, typename _To> + class __is_convertible_helper<_From, _To, false> + : public __sfinae_types + { + template<typename _To1> + static void __test_aux(_To1); + + template<typename _From1, typename _To1> + static decltype(__test_aux<_To1>(std::declval<_From1>()), __one()) + __test(int); + + template<typename, typename> + static __two __test(...); + + public: + static constexpr bool value = sizeof(__test<_From, _To>(0)) == 1; + }; + + /// is_convertible + template<typename _From, typename _To> + struct is_convertible + : public integral_constant<bool, + __is_convertible_helper<_From, _To>::value> + { }; + + /// is_explicitly_convertible + template<typename _From, typename _To> + struct is_explicitly_convertible + : public is_constructible<_To, _From> + { }; + + + // const-volatile modifications. + + /// remove_const + template<typename _Tp> + struct remove_const + { typedef _Tp type; }; + + template<typename _Tp> + struct remove_const<_Tp const> + { typedef _Tp type; }; + + /// remove_volatile + template<typename _Tp> + struct remove_volatile + { typedef _Tp type; }; + + template<typename _Tp> + struct remove_volatile<_Tp volatile> + { typedef _Tp type; }; + + /// remove_cv + template<typename _Tp> + struct remove_cv + { + typedef typename + remove_const<typename remove_volatile<_Tp>::type>::type type; + }; + + /// add_const + template<typename _Tp> + struct add_const + { typedef _Tp const type; }; + + /// add_volatile + template<typename _Tp> + struct add_volatile + { typedef _Tp volatile type; }; + + /// add_cv + template<typename _Tp> + struct add_cv + { + typedef typename + add_const<typename add_volatile<_Tp>::type>::type type; + }; + + + // Reference transformations. + + /// remove_reference + template<typename _Tp> + struct remove_reference + { typedef _Tp type; }; + + template<typename _Tp> + struct remove_reference<_Tp&> + { typedef _Tp type; }; + + template<typename _Tp> + struct remove_reference<_Tp&&> + { typedef _Tp type; }; + + template<typename _Tp, + bool = __and_<__not_<is_reference<_Tp>>, + __not_<is_void<_Tp>>>::value, + bool = is_rvalue_reference<_Tp>::value> + struct __add_lvalue_reference_helper + { typedef _Tp type; }; + + template<typename _Tp> + struct __add_lvalue_reference_helper<_Tp, true, false> + { typedef _Tp& type; }; + + template<typename _Tp> + struct __add_lvalue_reference_helper<_Tp, false, true> + { typedef typename remove_reference<_Tp>::type& type; }; + + /// add_lvalue_reference + template<typename _Tp> + struct add_lvalue_reference + : public __add_lvalue_reference_helper<_Tp> + { }; + + template<typename _Tp, + bool = __and_<__not_<is_reference<_Tp>>, + __not_<is_void<_Tp>>>::value> + struct __add_rvalue_reference_helper + { typedef _Tp type; }; + + template<typename _Tp> + struct __add_rvalue_reference_helper<_Tp, true> + { typedef _Tp&& type; }; + + /// add_rvalue_reference + template<typename _Tp> + struct add_rvalue_reference + : public __add_rvalue_reference_helper<_Tp> + { }; + + + // sign modifications. + + // Utility for constructing identically cv-qualified types. + template<typename _Unqualified, bool _IsConst, bool _IsVol> + struct __cv_selector; + + template<typename _Unqualified> + struct __cv_selector<_Unqualified, false, false> + { typedef _Unqualified __type; }; + + template<typename _Unqualified> + struct __cv_selector<_Unqualified, false, true> + { typedef volatile _Unqualified __type; }; + + template<typename _Unqualified> + struct __cv_selector<_Unqualified, true, false> + { typedef const _Unqualified __type; }; + + template<typename _Unqualified> + struct __cv_selector<_Unqualified, true, true> + { typedef const volatile _Unqualified __type; }; + + template<typename _Qualified, typename _Unqualified, + bool _IsConst = is_const<_Qualified>::value, + bool _IsVol = is_volatile<_Qualified>::value> + class __match_cv_qualifiers + { + typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; + + public: + typedef typename __match::__type __type; + }; + + // Utility for finding the unsigned versions of signed integral types. + template<typename _Tp> + struct __make_unsigned + { typedef _Tp __type; }; + + template<> + struct __make_unsigned<char> + { typedef unsigned char __type; }; + + template<> + struct __make_unsigned<signed char> + { typedef unsigned char __type; }; + + template<> + struct __make_unsigned<short> + { typedef unsigned short __type; }; + + template<> + struct __make_unsigned<int> + { typedef unsigned int __type; }; + + template<> + struct __make_unsigned<long> + { typedef unsigned long __type; }; + + template<> + struct __make_unsigned<long long> + { typedef unsigned long long __type; }; + +#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128) + template<> + struct __make_unsigned<__int128> + { typedef unsigned __int128 __type; }; +#endif + + // Select between integral and enum: not possible to be both. + template<typename _Tp, + bool _IsInt = is_integral<_Tp>::value, + bool _IsEnum = is_enum<_Tp>::value> + class __make_unsigned_selector; + + template<typename _Tp> + class __make_unsigned_selector<_Tp, true, false> + { + typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt; + typedef typename __unsignedt::__type __unsigned_type; + typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; + + public: + typedef typename __cv_unsigned::__type __type; + }; + + template<typename _Tp> + class __make_unsigned_selector<_Tp, false, true> + { + // With -fshort-enums, an enum may be as small as a char. + typedef unsigned char __smallest; + static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); + static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); + static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); + typedef conditional<__b2, unsigned int, unsigned long> __cond2; + typedef typename __cond2::type __cond2_type; + typedef conditional<__b1, unsigned short, __cond2_type> __cond1; + typedef typename __cond1::type __cond1_type; + + public: + typedef typename conditional<__b0, __smallest, __cond1_type>::type __type; + }; + + // Given an integral/enum type, return the corresponding unsigned + // integer type. + // Primary template. + /// make_unsigned + template<typename _Tp> + struct make_unsigned + { typedef typename __make_unsigned_selector<_Tp>::__type type; }; + + // Integral, but don't define. + template<> + struct make_unsigned<bool>; + + + // Utility for finding the signed versions of unsigned integral types. + template<typename _Tp> + struct __make_signed + { typedef _Tp __type; }; + + template<> + struct __make_signed<char> + { typedef signed char __type; }; + + template<> + struct __make_signed<unsigned char> + { typedef signed char __type; }; + + template<> + struct __make_signed<unsigned short> + { typedef signed short __type; }; + + template<> + struct __make_signed<unsigned int> + { typedef signed int __type; }; + + template<> + struct __make_signed<unsigned long> + { typedef signed long __type; }; + + template<> + struct __make_signed<unsigned long long> + { typedef signed long long __type; }; + +#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128) + template<> + struct __make_signed<unsigned __int128> + { typedef __int128 __type; }; +#endif + + // Select between integral and enum: not possible to be both. + template<typename _Tp, + bool _IsInt = is_integral<_Tp>::value, + bool _IsEnum = is_enum<_Tp>::value> + class __make_signed_selector; + + template<typename _Tp> + class __make_signed_selector<_Tp, true, false> + { + typedef __make_signed<typename remove_cv<_Tp>::type> __signedt; + typedef typename __signedt::__type __signed_type; + typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; + + public: + typedef typename __cv_signed::__type __type; + }; + + template<typename _Tp> + class __make_signed_selector<_Tp, false, true> + { + // With -fshort-enums, an enum may be as small as a char. + typedef signed char __smallest; + static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); + static const bool __b1 = sizeof(_Tp) <= sizeof(signed short); + static const bool __b2 = sizeof(_Tp) <= sizeof(signed int); + typedef conditional<__b2, signed int, signed long> __cond2; + typedef typename __cond2::type __cond2_type; + typedef conditional<__b1, signed short, __cond2_type> __cond1; + typedef typename __cond1::type __cond1_type; + + public: + typedef typename conditional<__b0, __smallest, __cond1_type>::type __type; + }; + + // Given an integral/enum type, return the corresponding signed + // integer type. + // Primary template. + /// make_signed + template<typename _Tp> + struct make_signed + { typedef typename __make_signed_selector<_Tp>::__type type; }; + + // Integral, but don't define. + template<> + struct make_signed<bool>; + + + // array modifications. + + /// remove_extent + template<typename _Tp> + struct remove_extent + { typedef _Tp type; }; + + template<typename _Tp, std::size_t _Size> + struct remove_extent<_Tp[_Size]> + { typedef _Tp type; }; + + template<typename _Tp> + struct remove_extent<_Tp[]> + { typedef _Tp type; }; + + /// remove_all_extents + template<typename _Tp> + struct remove_all_extents + { typedef _Tp type; }; + + template<typename _Tp, std::size_t _Size> + struct remove_all_extents<_Tp[_Size]> + { typedef typename remove_all_extents<_Tp>::type type; }; + + template<typename _Tp> + struct remove_all_extents<_Tp[]> + { typedef typename remove_all_extents<_Tp>::type type; }; + + + // pointer modifications. + + template<typename _Tp, typename> + struct __remove_pointer_helper + { typedef _Tp type; }; + + template<typename _Tp, typename _Up> + struct __remove_pointer_helper<_Tp, _Up*> + { typedef _Up type; }; + + /// remove_pointer + template<typename _Tp> + struct remove_pointer + : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> + { }; + + /// add_pointer + template<typename _Tp> + struct add_pointer + { typedef typename remove_reference<_Tp>::type* type; }; + + + template<std::size_t _Len> + struct __aligned_storage_msa + { + union __type + { + unsigned char __data[_Len]; + struct __attribute__((__aligned__)) { } __align; + }; + }; + + /** + * @brief Alignment type. + * + * The value of _Align is a default-alignment which shall be the + * most stringent alignment requirement for any C++ object type + * whose size is no greater than _Len (3.9). The member typedef + * type shall be a POD type suitable for use as uninitialized + * storage for any object whose size is at most _Len and whose + * alignment is a divisor of _Align. + */ + template<std::size_t _Len, std::size_t _Align = + __alignof__(typename __aligned_storage_msa<_Len>::__type)> + struct aligned_storage + { + union type + { + unsigned char __data[_Len]; + struct __attribute__((__aligned__((_Align)))) { } __align; + }; + }; + + + // Decay trait for arrays and functions, used for perfect forwarding + // in make_pair, make_tuple, etc. + template<typename _Up, + bool _IsArray = is_array<_Up>::value, + bool _IsFunction = is_function<_Up>::value> + struct __decay_selector; + + // NB: DR 705. + template<typename _Up> + struct __decay_selector<_Up, false, false> + { typedef typename remove_cv<_Up>::type __type; }; + + template<typename _Up> + struct __decay_selector<_Up, true, false> + { typedef typename remove_extent<_Up>::type* __type; }; + + template<typename _Up> + struct __decay_selector<_Up, false, true> + { typedef typename add_pointer<_Up>::type __type; }; + + /// decay + template<typename _Tp> + class decay + { + typedef typename remove_reference<_Tp>::type __remove_type; + + public: + typedef typename __decay_selector<__remove_type>::__type type; + }; + + template<typename _Tp> + class reference_wrapper; + + // Helper which adds a reference to a type when given a reference_wrapper + template<typename _Tp> + struct __strip_reference_wrapper + { + typedef _Tp __type; + }; + + template<typename _Tp> + struct __strip_reference_wrapper<reference_wrapper<_Tp> > + { + typedef _Tp& __type; + }; + + template<typename _Tp> + struct __strip_reference_wrapper<const reference_wrapper<_Tp> > + { + typedef _Tp& __type; + }; + + template<typename _Tp> + struct __decay_and_strip + { + typedef typename __strip_reference_wrapper< + typename decay<_Tp>::type>::__type __type; + }; + + + // Primary template. + /// Define a member typedef @c type only if a boolean constant is true. + template<bool, typename _Tp = void> + struct enable_if + { }; + + // Partial specialization for true. + template<typename _Tp> + struct enable_if<true, _Tp> + { typedef _Tp type; }; + + + // Primary template. + /// Define a member typedef @c type to one of two argument types. + template<bool _Cond, typename _Iftrue, typename _Iffalse> + struct conditional + { typedef _Iftrue type; }; + + // Partial specialization for false. + template<typename _Iftrue, typename _Iffalse> + struct conditional<false, _Iftrue, _Iffalse> + { typedef _Iffalse type; }; + + + /// common_type + template<typename... _Tp> + struct common_type; + + template<typename _Tp> + struct common_type<_Tp> + { typedef _Tp type; }; + + template<typename _Tp, typename _Up> + struct common_type<_Tp, _Up> + { typedef typename decay<decltype(true ? declval<_Tp>() : declval<_Up>())>::type type; }; + + template<typename _Tp, typename _Up, typename... _Vp> + struct common_type<_Tp, _Up, _Vp...> + { + typedef typename + common_type<typename common_type<_Tp, _Up>::type, _Vp...>::type type; + }; + + /// The underlying type of an enum. + template<typename _Tp> + struct underlying_type + { + typedef __underlying_type(_Tp) type; + }; + + template<typename _Tp> + struct __declval_protector + { + static const bool __stop = false; + static typename add_rvalue_reference<_Tp>::type __delegate(); + }; + + template<typename _Tp> + inline typename add_rvalue_reference<_Tp>::type + declval() noexcept + { + static_assert(__declval_protector<_Tp>::__stop, + "declval() must not be used!"); + return __declval_protector<_Tp>::__delegate(); + } + + /// result_of + template<typename _Signature> + class result_of; + + template<typename _MemPtr, typename _Arg> + struct _Result_of_memobj; + + template<typename _Res, typename _Class, typename _Arg> + struct _Result_of_memobj<_Res _Class::*, _Arg> + { + private: + typedef _Res _Class::* _Func; + + template<typename _Tp> + static _Tp _S_get(const _Class&); + template<typename _Tp> + static decltype(*std::declval<_Tp>()) _S_get(...); + + public: + typedef + decltype(_S_get<_Arg>(std::declval<_Arg>()).*std::declval<_Func>()) + __type; + }; + + template<typename _MemPtr, typename _Arg, typename... _ArgTypes> + struct _Result_of_memfun; + + template<typename _Res, typename _Class, typename _Arg, typename... _Args> + struct _Result_of_memfun<_Res _Class::*, _Arg, _Args...> + { + private: + typedef _Res _Class::* _Func; + + template<typename _Tp> + static _Tp _S_get(const _Class&); + template<typename _Tp> + static decltype(*std::declval<_Tp>()) _S_get(...); + + public: + typedef + decltype((_S_get<_Arg>(std::declval<_Arg>()).*std::declval<_Func>()) + (std::declval<_Args>()...) ) + __type; + }; + + template<bool, bool, typename _Functor, typename... _ArgTypes> + struct _Result_of_impl; + + template<typename _Functor, typename... _ArgTypes> + struct _Result_of_impl<false, false, _Functor, _ArgTypes...> + { + typedef + decltype( std::declval<_Functor>()(std::declval<_ArgTypes>()...) ) + __type; + }; + + template<typename _MemPtr, typename _Arg> + struct _Result_of_impl<true, false, _MemPtr, _Arg> + : _Result_of_memobj<typename remove_reference<_MemPtr>::type, _Arg> + { + typedef typename _Result_of_memobj< + typename remove_reference<_MemPtr>::type, _Arg>::__type + __type; + }; + + template<typename _MemPtr, typename _Arg, typename... _ArgTypes> + struct _Result_of_impl<false, true, _MemPtr, _Arg, _ArgTypes...> + : _Result_of_memfun<typename remove_reference<_MemPtr>::type, _Arg, + _ArgTypes...> + { + typedef typename _Result_of_memfun< + typename remove_reference<_MemPtr>::type, _Arg, _ArgTypes...>::__type + __type; + }; + + template<typename _Functor, typename... _ArgTypes> + struct result_of<_Functor(_ArgTypes...)> + : _Result_of_impl<is_member_object_pointer< + typename remove_reference<_Functor>::type >::value, + is_member_function_pointer< + typename remove_reference<_Functor>::type >::value, + _Functor, _ArgTypes...> + { + typedef typename _Result_of_impl< + is_member_object_pointer< + typename remove_reference<_Functor>::type >::value, + is_member_function_pointer< + typename remove_reference<_Functor>::type >::value, + _Functor, _ArgTypes...>::__type + type; + }; + + /** + * Use SFINAE to determine if the type _Tp has a publicly-accessible + * member type _NTYPE. + */ +#define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ + template<typename _Tp> \ + class __has_##_NTYPE##_helper \ + : __sfinae_types \ + { \ + template<typename _Up> \ + struct _Wrap_type \ + { }; \ + \ + template<typename _Up> \ + static __one __test(_Wrap_type<typename _Up::_NTYPE>*); \ + \ + template<typename _Up> \ + static __two __test(...); \ + \ + public: \ + static constexpr bool value = sizeof(__test<_Tp>(0)) == 1; \ + }; \ + \ + template<typename _Tp> \ + struct __has_##_NTYPE \ + : integral_constant<bool, __has_##_NTYPE##_helper \ + <typename remove_cv<_Tp>::type>::value> \ + { }; + + /// @} group metaprogramming +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace + +#endif // __GXX_EXPERIMENTAL_CXX0X__ + +#endif // _GLIBCXX_TYPE_TRAITS |