type_traits
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// C++11 <type_traits> -*- C++ -*-
// Copyright (C) 2007-2018 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
#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else
#include <bits/c++config.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
/**
* @defgroup metaprogramming Metaprogramming
* @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() const noexcept { return value; }
#if __cplusplus > 201103L
#define __cpp_lib_integral_constant_callable 201304
constexpr value_type operator()() const noexcept { return value; }
#endif
};
template<typename _Tp, _Tp __v>
constexpr _Tp integral_constant<_Tp, __v>::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<bool __v>
using __bool_constant = integral_constant<bool, __v>;
#if __cplusplus > 201402L
# define __cpp_lib_bool_constant 201505
template<bool __v>
using bool_constant = integral_constant<bool, __v>;
#endif
// 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 __bool_constant<!bool(_Pp::value)>
{ };
#if __cplusplus >= 201703L
#define __cpp_lib_logical_traits 201510
template<typename... _Bn>
struct conjunction
: __and_<_Bn...>
{ };
template<typename... _Bn>
struct disjunction
: __or_<_Bn...>
{ };
template<typename _Pp>
struct negation
: __not_<_Pp>
{ };
template<typename... _Bn>
inline constexpr bool conjunction_v = conjunction<_Bn...>::value;
template<typename... _Bn>
inline constexpr bool disjunction_v = disjunction<_Bn...>::value;
template<typename _Pp>
inline constexpr bool negation_v = negation<_Pp>::value;
#endif // C++17
// For several sfinae-friendly trait implementations we transport both the
// result information (as the member type) and the failure information (no
// member type). This is very similar to std::enable_if, but we cannot use
// them, because we need to derive from them as an implementation detail.
template<typename _Tp>
struct __success_type
{ typedef _Tp type; };
struct __failure_type
{ };
// 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 __is_void_helper<typename remove_cv<_Tp>::type>::type
{ };
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 { };
// Conditionalizing on __STRICT_ANSI__ here will break any port that
// uses one of these types for size_t.
#if defined(__GLIBCXX_TYPE_INT_N_0)
template<>
struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0>
: public true_type { };
template<>
struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0>
: public true_type { };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_1)
template<>
struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1>
: public true_type { };
template<>
struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1>
: public true_type { };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_2)
template<>
struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2>
: public true_type { };
template<>
struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2>
: public true_type { };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_3)
template<>
struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3>
: public true_type { };
template<>
struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3>
: public true_type { };
#endif
/// is_integral
template<typename _Tp>
struct is_integral
: public __is_integral_helper<typename remove_cv<_Tp>::type>::type
{ };
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) && !defined(__CUDACC__)
template<>
struct __is_floating_point_helper<__float128>
: public true_type { };
#endif
/// is_floating_point
template<typename _Tp>
struct is_floating_point
: public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type
{ };
/// 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 __is_pointer_helper<typename remove_cv<_Tp>::type>::type
{ };
/// 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 __is_member_object_pointer_helper<
typename remove_cv<_Tp>::type>::type
{ };
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 __is_member_function_pointer_helper<
typename remove_cv<_Tp>::type>::type
{ };
/// 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 _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) const _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) const & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) const && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) const _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) const & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) const && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) const volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) const volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes...) const volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) const volatile _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) const volatile & _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM>
struct is_function<_Res(_ArgTypes......) const volatile && _GLIBCXX_NOEXCEPT_QUAL>
: public true_type { };
#define __cpp_lib_is_null_pointer 201309
template<typename>
struct __is_null_pointer_helper
: public false_type { };
template<>
struct __is_null_pointer_helper<std::nullptr_t>
: public true_type { };
/// is_null_pointer (LWG 2247).
template<typename _Tp>
struct is_null_pointer
: public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type
{ };
/// __is_nullptr_t (extension).
template<typename _Tp>
struct __is_nullptr_t
: public is_null_pointer<_Tp>
{ };
// 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>,
is_null_pointer<_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_null_pointer<_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 __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type
{ };
// Utility to detect referenceable types ([defns.referenceable]).
template<typename _Tp>
struct __is_referenceable
: public __or_<is_object<_Tp>, is_reference<_Tp>>::type
{ };
template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM>
struct __is_referenceable<_Res(_Args...) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type
{ };
template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM>
struct __is_referenceable<_Res(_Args......) _GLIBCXX_NOEXCEPT_QUAL>
: public true_type
{ };
// 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
template<typename _Tp>
struct is_trivially_copyable
: public integral_constant<bool, __is_trivially_copyable(_Tp)>
{ };
/// 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)>
{ };
#if __cplusplus >= 201402L
#define __cpp_lib_is_final 201402L
/// is_final
template<typename _Tp>
struct is_final
: public integral_constant<bool, __is_final(_Tp)>
{ };
#endif
/// is_abstract
template<typename _Tp>
struct is_abstract
: public integral_constant<bool, __is_abstract(_Tp)>
{ };
template<typename _Tp,
bool = is_arithmetic<_Tp>::value>
struct __is_signed_helper
: public false_type { };
template<typename _Tp>
struct __is_signed_helper<_Tp, true>
: public integral_constant<bool, _Tp(-1) < _Tp(0)>
{ };
/// is_signed
template<typename _Tp>
struct is_signed
: public __is_signed_helper<_Tp>::type
{ };
/// is_unsigned
template<typename _Tp>
struct is_unsigned
: public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>
{ };
// Destructible and constructible type properties.
/**
* @brief Utility to simplify expressions used in unevaluated operands
* @ingroup utilities
*/
template<typename _Tp, typename _Up = _Tp&&>
_Up
__declval(int);
template<typename _Tp>
_Tp
__declval(long);
template<typename _Tp>
auto declval() noexcept -> decltype(__declval<_Tp>(0));
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>>>
{ };
// In N3290 is_destructible does not say anything about function
// types and abstract types, see LWG 2049. This implementation
// describes function types as non-destructible and all complete
// object types as destructible, iff the explicit destructor
// call expression is wellformed.
struct __do_is_destructible_impl
{
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
: public __do_is_destructible_impl
{
typedef decltype(__test<_Tp>(0)) type;
};
template<typename _Tp,
bool = __or_<is_void<_Tp>,
__is_array_unknown_bounds<_Tp>,
is_function<_Tp>>::value,
bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value>
struct __is_destructible_safe;
template<typename _Tp>
struct __is_destructible_safe<_Tp, false, false>
: public __is_destructible_impl<typename
remove_all_extents<_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 __is_destructible_safe<_Tp>::type
{ };
// is_nothrow_destructible requires that is_destructible is
// satisfied as well. We realize that by mimicing the
// implementation of is_destructible but refer to noexcept(expr)
// instead of decltype(expr).
struct __do_is_nt_destructible_impl
{
template<typename _Tp>
static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())>
__test(int);
template<typename>
static false_type __test(...);
};
template<typename _Tp>
struct __is_nt_destructible_impl
: public __do_is_nt_destructible_impl
{
typedef decltype(__test<_Tp>(0)) type;
};
template<typename _Tp,
bool = __or_<is_void<_Tp>,
__is_array_unknown_bounds<_Tp>,
is_function<_Tp>>::value,
bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value>
struct __is_nt_destructible_safe;
template<typename _Tp>
struct __is_nt_destructible_safe<_Tp, false, false>
: public __is_nt_destructible_impl<typename
remove_all_extents<_Tp>::type>::type
{ };
template<typename _Tp>
struct __is_nt_destructible_safe<_Tp, true, false>
: public false_type { };
template<typename _Tp>
struct __is_nt_destructible_safe<_Tp, false, true>
: public true_type { };
/// is_nothrow_destructible
template<typename _Tp>
struct is_nothrow_destructible
: public __is_nt_destructible_safe<_Tp>::type
{ };
/// is_constructible
template<typename _Tp, typename... _Args>
struct is_constructible
: public __bool_constant<__is_constructible(_Tp, _Args...)>
{ };
/// is_default_constructible
template<typename _Tp>
struct is_default_constructible
: public is_constructible<_Tp>::type
{ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_copy_constructible_impl;
template<typename _Tp>
struct __is_copy_constructible_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_copy_constructible_impl<_Tp, true>
: 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_referenceable<_Tp>::value>
struct __is_move_constructible_impl;
template<typename _Tp>
struct __is_move_constructible_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_move_constructible_impl<_Tp, true>
: 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>>
{ };
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>>
{ };
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...>>
{ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_nothrow_copy_constructible_impl;
template<typename _Tp>
struct __is_nothrow_copy_constructible_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_nothrow_copy_constructible_impl<_Tp, true>
: 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_referenceable<_Tp>::value>
struct __is_nothrow_move_constructible_impl;
template<typename _Tp>
struct __is_nothrow_move_constructible_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_nothrow_move_constructible_impl<_Tp, true>
: 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>
{ };
/// is_assignable
template<typename _Tp, typename _Up>
struct is_assignable
: public __bool_constant<__is_assignable(_Tp, _Up)>
{ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_copy_assignable_impl;
template<typename _Tp>
struct __is_copy_assignable_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_copy_assignable_impl<_Tp, true>
: 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_referenceable<_Tp>::value>
struct __is_move_assignable_impl;
template<typename _Tp>
struct __is_move_assignable_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_move_assignable_impl<_Tp, true>
: 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>>
{ };
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_nt_copy_assignable_impl;
template<typename _Tp>
struct __is_nt_copy_assignable_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_nt_copy_assignable_impl<_Tp, true>
: 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_referenceable<_Tp>::value>
struct __is_nt_move_assignable_impl;
template<typename _Tp>
struct __is_nt_move_assignable_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_nt_move_assignable_impl<_Tp, true>
: 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>
{ };
/// is_trivially_constructible
template<typename _Tp, typename... _Args>
struct is_trivially_constructible
: public __and_<is_constructible<_Tp, _Args...>, __bool_constant<
__is_trivially_constructible(_Tp, _Args...)>>::type
{ };
/// is_trivially_default_constructible
template<typename _Tp>
struct is_trivially_default_constructible
: public is_trivially_constructible<_Tp>::type
{ };
struct __do_is_implicitly_default_constructible_impl
{
template <typename _Tp>
static void __helper(const _Tp&);
template <typename _Tp>
static true_type __test(const _Tp&,
decltype(__helper<const _Tp&>({}))* = 0);
static false_type __test(...);
};
template<typename _Tp>
struct __is_implicitly_default_constructible_impl
: public __do_is_implicitly_default_constructible_impl
{
typedef decltype(__test(declval<_Tp>())) type;
};
template<typename _Tp>
struct __is_implicitly_default_constructible_safe
: public __is_implicitly_default_constructible_impl<_Tp>::type
{ };
template <typename _Tp>
struct __is_implicitly_default_constructible
: public __and_<is_default_constructible<_Tp>,
__is_implicitly_default_constructible_safe<_Tp>>
{ };
/// is_trivially_copy_constructible
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_trivially_copy_constructible_impl;
template<typename _Tp>
struct __is_trivially_copy_constructible_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_trivially_copy_constructible_impl<_Tp, true>
: public __and_<is_copy_constructible<_Tp>,
integral_constant<bool,
__is_trivially_constructible(_Tp, const _Tp&)>>
{ };
template<typename _Tp>
struct is_trivially_copy_constructible
: public __is_trivially_copy_constructible_impl<_Tp>
{ };
/// is_trivially_move_constructible
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_trivially_move_constructible_impl;
template<typename _Tp>
struct __is_trivially_move_constructible_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_trivially_move_constructible_impl<_Tp, true>
: public __and_<is_move_constructible<_Tp>,
integral_constant<bool,
__is_trivially_constructible(_Tp, _Tp&&)>>
{ };
template<typename _Tp>
struct is_trivially_move_constructible
: public __is_trivially_move_constructible_impl<_Tp>
{ };
/// is_trivially_assignable
template<typename _Tp, typename _Up>
struct is_trivially_assignable
: public __bool_constant<__is_trivially_assignable(_Tp, _Up)>
{ };
/// is_trivially_copy_assignable
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_trivially_copy_assignable_impl;
template<typename _Tp>
struct __is_trivially_copy_assignable_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_trivially_copy_assignable_impl<_Tp, true>
: public __and_<is_copy_assignable<_Tp>,
integral_constant<bool,
__is_trivially_assignable(_Tp&, const _Tp&)>>
{ };
template<typename _Tp>
struct is_trivially_copy_assignable
: public __is_trivially_copy_assignable_impl<_Tp>
{ };
/// is_trivially_move_assignable
template<typename _Tp, bool = __is_referenceable<_Tp>::value>
struct __is_trivially_move_assignable_impl;
template<typename _Tp>
struct __is_trivially_move_assignable_impl<_Tp, false>
: public false_type { };
template<typename _Tp>
struct __is_trivially_move_assignable_impl<_Tp, true>
: public __and_<is_move_assignable<_Tp>,
integral_constant<bool,
__is_trivially_assignable(_Tp&, _Tp&&)>>
{ };
template<typename _Tp>
struct is_trivially_move_assignable
: public __is_trivially_move_assignable_impl<_Tp>
{ };
/// is_trivially_destructible
template<typename _Tp>
struct is_trivially_destructible
: public __and_<is_destructible<_Tp>, 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
{ typedef typename is_void<_To>::type type; };
template<typename _From, typename _To>
class __is_convertible_helper<_From, _To, false>
{
template<typename _To1>
static void __test_aux(_To1);
template<typename _From1, typename _To1,
typename = decltype(__test_aux<_To1>(std::declval<_From1>()))>
static true_type
__test(int);
template<typename, typename>
static false_type
__test(...);
public:
typedef decltype(__test<_From, _To>(0)) type;
};
/// is_convertible
template<typename _From, typename _To>
struct is_convertible
: public __is_convertible_helper<_From, _To>::type
{ };
// 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;
};
#if __cplusplus > 201103L
#define __cpp_lib_transformation_trait_aliases 201304
/// Alias template for remove_const
template<typename _Tp>
using remove_const_t = typename remove_const<_Tp>::type;
/// Alias template for remove_volatile
template<typename _Tp>
using remove_volatile_t = typename remove_volatile<_Tp>::type;
/// Alias template for remove_cv
template<typename _Tp>
using remove_cv_t = typename remove_cv<_Tp>::type;
/// Alias template for add_const
template<typename _Tp>
using add_const_t = typename add_const<_Tp>::type;
/// Alias template for add_volatile
template<typename _Tp>
using add_volatile_t = typename add_volatile<_Tp>::type;
/// Alias template for add_cv
template<typename _Tp>
using add_cv_t = typename add_cv<_Tp>::type;
#endif
// 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 = __is_referenceable<_Tp>::value>
struct __add_lvalue_reference_helper
{ typedef _Tp type; };
template<typename _Tp>
struct __add_lvalue_reference_helper<_Tp, true>
{ typedef _Tp& type; };
/// add_lvalue_reference
template<typename _Tp>
struct add_lvalue_reference
: public __add_lvalue_reference_helper<_Tp>
{ };
template<typename _Tp, bool = __is_referenceable<_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>
{ };
#if __cplusplus > 201103L
/// Alias template for remove_reference
template<typename _Tp>
using remove_reference_t = typename remove_reference<_Tp>::type;
/// Alias template for add_lvalue_reference
template<typename _Tp>
using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type;
/// Alias template for add_rvalue_reference
template<typename _Tp>
using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type;
#endif
// 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(__GLIBCXX_TYPE_INT_N_0)
template<>
struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0>
{ typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_1)
template<>
struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1>
{ typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_2)
template<>
struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2>
{ typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_3)
template<>
struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3>
{ typedef unsigned __GLIBCXX_TYPE_INT_N_3 __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);
static const bool __b3 = sizeof(_Tp) <= sizeof(unsigned long);
typedef conditional<__b3, unsigned long, unsigned long long> __cond3;
typedef typename __cond3::type __cond3_type;
typedef conditional<__b2, unsigned int, __cond3_type> __cond2;
typedef typename __cond2::type __cond2_type;
typedef conditional<__b1, unsigned short, __cond2_type> __cond1;
typedef typename __cond1::type __cond1_type;
typedef typename conditional<__b0, __smallest, __cond1_type>::type
__unsigned_type;
typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned;
public:
typedef typename __cv_unsigned::__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(__GLIBCXX_TYPE_INT_N_0)
template<>
struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0>
{ typedef __GLIBCXX_TYPE_INT_N_0 __type; };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_1)
template<>
struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1>
{ typedef __GLIBCXX_TYPE_INT_N_1 __type; };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_2)
template<>
struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2>
{ typedef __GLIBCXX_TYPE_INT_N_2 __type; };
#endif
#if defined(__GLIBCXX_TYPE_INT_N_3)
template<>
struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3>
{ typedef __GLIBCXX_TYPE_INT_N_3 __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>
{
typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type;
public:
typedef typename __make_signed_selector<__unsigned_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>;
#if __cplusplus > 201103L
/// Alias template for make_signed
template<typename _Tp>
using make_signed_t = typename make_signed<_Tp>::type;
/// Alias template for make_unsigned
template<typename _Tp>
using make_unsigned_t = typename make_unsigned<_Tp>::type;
#endif
// 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; };
#if __cplusplus > 201103L
/// Alias template for remove_extent
template<typename _Tp>
using remove_extent_t = typename remove_extent<_Tp>::type;
/// Alias template for remove_all_extents
template<typename _Tp>
using remove_all_extents_t = typename remove_all_extents<_Tp>::type;
#endif
// 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, bool = __or_<__is_referenceable<_Tp>,
is_void<_Tp>>::value>
struct __add_pointer_helper
{ typedef _Tp type; };
template<typename _Tp>
struct __add_pointer_helper<_Tp, true>
{ typedef typename remove_reference<_Tp>::type* type; };
template<typename _Tp>
struct add_pointer
: public __add_pointer_helper<_Tp>
{ };
#if __cplusplus > 201103L
/// Alias template for remove_pointer
template<typename _Tp>
using remove_pointer_t = typename remove_pointer<_Tp>::type;
/// Alias template for add_pointer
template<typename _Tp>
using add_pointer_t = typename add_pointer<_Tp>::type;
#endif
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;
};
};
template <typename... _Types>
struct __strictest_alignment
{
static const size_t _S_alignment = 0;
static const size_t _S_size = 0;
};
template <typename _Tp, typename... _Types>
struct __strictest_alignment<_Tp, _Types...>
{
static const size_t _S_alignment =
alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment
? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment;
static const size_t _S_size =
sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size
? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size;
};
/**
* @brief Provide aligned storage for types.
*
* [meta.trans.other]
*
* Provides aligned storage for any of the provided types of at
* least size _Len.
*
* @see aligned_storage
*/
template <size_t _Len, typename... _Types>
struct aligned_union
{
private:
static_assert(sizeof...(_Types) != 0, "At least one type is required");
using __strictest = __strictest_alignment<_Types...>;
static const size_t _S_len = _Len > __strictest::_S_size
? _Len : __strictest::_S_size;
public:
/// The value of the strictest alignment of _Types.
static const size_t alignment_value = __strictest::_S_alignment;
/// The storage.
typedef typename aligned_storage<_S_len, alignment_value>::type type;
};
template <size_t _Len, typename... _Types>
const size_t aligned_union<_Len, _Types...>::alignment_value;
// 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 __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; };
template<typename... _Cond>
using _Require = typename enable_if<__and_<_Cond...>::value>::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;
// Sfinae-friendly common_type implementation:
struct __do_common_type_impl
{
template<typename _Tp, typename _Up>
static __success_type<typename decay<decltype
(true ? std::declval<_Tp>()
: std::declval<_Up>())>::type> _S_test(int);
template<typename, typename>
static __failure_type _S_test(...);
};
template<typename _Tp, typename _Up>
struct __common_type_impl
: private __do_common_type_impl
{
typedef decltype(_S_test<_Tp, _Up>(0)) type;
};
struct __do_member_type_wrapper
{
template<typename _Tp>
static __success_type<typename _Tp::type> _S_test(int);
template<typename>
static __failure_type _S_test(...);
};
template<typename _Tp>
struct __member_type_wrapper
: private __do_member_type_wrapper
{
typedef decltype(_S_test<_Tp>(0)) type;
};
template<typename _CTp, typename... _Args>
struct __expanded_common_type_wrapper
{
typedef common_type<typename _CTp::type, _Args...> type;
};
template<typename... _Args>
struct __expanded_common_type_wrapper<__failure_type, _Args...>
{ typedef __failure_type type; };
template<>
struct common_type<>
{ };
template<typename _Tp>
struct common_type<_Tp>
: common_type<_Tp, _Tp>
{ };
template<typename _Tp, typename _Up>
struct common_type<_Tp, _Up>
: public __common_type_impl<_Tp, _Up>::type
{ };
template<typename _Tp, typename _Up, typename... _Vp>
struct common_type<_Tp, _Up, _Vp...>
: public __expanded_common_type_wrapper<typename __member_type_wrapper<
common_type<_Tp, _Up>>::type, _Vp...>::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;
};
template<typename _Tp>
auto declval() noexcept -> decltype(__declval<_Tp>(0))
{
static_assert(__declval_protector<_Tp>::__stop,
"declval() must not be used!");
return __declval<_Tp>(0);
}
// wchar_t, char16_t and char32_t are integral types but are neither
// signed integer types nor unsigned integer types, so must be
// transformed to the integer type with the smallest rank that has the
// same size and signedness.
// Use the partial specialization for enumeration types to do that,
// which means these explicit specializations must be defined after
// std::conditional has been defined.
#if defined(_GLIBCXX_USE_WCHAR_T)
template<>
struct __make_unsigned<wchar_t>
{
using __type
= typename __make_unsigned_selector<wchar_t, false, true>::__type;
};
template<>
struct __make_signed<wchar_t>
{
using __type
= typename __make_signed_selector<wchar_t, false, true>::__type;
};
#endif
template<>
struct __make_unsigned<char16_t>
{
using __type
= typename __make_unsigned_selector<char16_t, false, true>::__type;
};
template<>
struct __make_signed<char16_t>
{
using __type
= typename __make_signed_selector<char16_t, false, true>::__type;
};
template<>
struct __make_unsigned<char32_t>
{
using __type
= typename __make_unsigned_selector<char32_t, false, true>::__type;
};
template<>
struct __make_signed<char32_t>
{
using __type
= typename __make_signed_selector<char32_t, false, true>::__type;
};
/// result_of
template<typename _Signature>
class result_of;
// Sfinae-friendly result_of implementation:
#define __cpp_lib_result_of_sfinae 201210
struct __invoke_memfun_ref { };
struct __invoke_memfun_deref { };
struct __invoke_memobj_ref { };
struct __invoke_memobj_deref { };
struct __invoke_other { };
// Associate a tag type with a specialization of __success_type.
template<typename _Tp, typename _Tag>
struct __result_of_success : __success_type<_Tp>
{ using __invoke_type = _Tag; };
// [func.require] paragraph 1 bullet 1:
struct __result_of_memfun_ref_impl
{
template<typename _Fp, typename _Tp1, typename... _Args>
static __result_of_success<decltype(
(std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...)
), __invoke_memfun_ref> _S_test(int);
template<typename...>
static __failure_type _S_test(...);
};
template<typename _MemPtr, typename _Arg, typename... _Args>
struct __result_of_memfun_ref
: private __result_of_memfun_ref_impl
{
typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type;
};
// [func.require] paragraph 1 bullet 2:
struct __result_of_memfun_deref_impl
{
template<typename _Fp, typename _Tp1, typename... _Args>
static __result_of_success<decltype(
((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...)
), __invoke_memfun_deref> _S_test(int);
template<typename...>
static __failure_type _S_test(...);
};
template<typename _MemPtr, typename _Arg, typename... _Args>
struct __result_of_memfun_deref
: private __result_of_memfun_deref_impl
{
typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type;
};
// [func.require] paragraph 1 bullet 3:
struct __result_of_memobj_ref_impl
{
template<typename _Fp, typename _Tp1>
static __result_of_success<decltype(
std::declval<_Tp1>().*std::declval<_Fp>()
), __invoke_memobj_ref> _S_test(int);
template<typename, typename>
static __failure_type _S_test(...);
};
template<typename _MemPtr, typename _Arg>
struct __result_of_memobj_ref
: private __result_of_memobj_ref_impl
{
typedef decltype(_S_test<_MemPtr, _Arg>(0)) type;
};
// [func.require] paragraph 1 bullet 4:
struct __result_of_memobj_deref_impl
{
template<typename _Fp, typename _Tp1>
static __result_of_success<decltype(
(*std::declval<_Tp1>()).*std::declval<_Fp>()
), __invoke_memobj_deref> _S_test(int);
template<typename, typename>
static __failure_type _S_test(...);
};
template<typename _MemPtr, typename _Arg>
struct __result_of_memobj_deref
: private __result_of_memobj_deref_impl
{
typedef decltype(_S_test<_MemPtr, _Arg>(0)) type;
};
template<typename _MemPtr, typename _Arg>
struct __result_of_memobj;
template<typename _Res, typename _Class, typename _Arg>
struct __result_of_memobj<_Res _Class::*, _Arg>
{
typedef typename remove_cv<typename remove_reference<
_Arg>::type>::type _Argval;
typedef _Res _Class::* _MemPtr;
typedef typename conditional<__or_<is_same<_Argval, _Class>,
is_base_of<_Class, _Argval>>::value,
__result_of_memobj_ref<_MemPtr, _Arg>,
__result_of_memobj_deref<_MemPtr, _Arg>
>::type::type type;
};
template<typename _MemPtr, typename _Arg, typename... _Args>
struct __result_of_memfun;
template<typename _Res, typename _Class, typename _Arg, typename... _Args>
struct __result_of_memfun<_Res _Class::*, _Arg, _Args...>
{
typedef typename remove_cv<typename remove_reference<
_Arg>::type>::type _Argval;
typedef _Res _Class::* _MemPtr;
typedef typename conditional<__or_<is_same<_Argval, _Class>,
is_base_of<_Class, _Argval>>::value,
__result_of_memfun_ref<_MemPtr, _Arg, _Args...>,
__result_of_memfun_deref<_MemPtr, _Arg, _Args...>
>::type::type type;
};
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 2219. INVOKE-ing a pointer to member with a reference_wrapper
// as the object expression
// Used by result_of, invoke etc. to unwrap a reference_wrapper.
template<typename _Tp, typename _Up = typename decay<_Tp>::type>
struct __inv_unwrap
{
using type = _Tp;
};
template<typename _Tp, typename _Up>
struct __inv_unwrap<_Tp, reference_wrapper<_Up>>
{
using type = _Up&;
};
template<bool, bool, typename _Functor, typename... _ArgTypes>
struct __result_of_impl
{
typedef __failure_type type;
};
template<typename _MemPtr, typename _Arg>
struct __result_of_impl<true, false, _MemPtr, _Arg>
: public __result_of_memobj<typename decay<_MemPtr>::type,
typename __inv_unwrap<_Arg>::type>
{ };
template<typename _MemPtr, typename _Arg, typename... _Args>
struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...>
: public __result_of_memfun<typename decay<_MemPtr>::type,
typename __inv_unwrap<_Arg>::type, _Args...>
{ };
// [func.require] paragraph 1 bullet 5:
struct __result_of_other_impl
{
template<typename _Fn, typename... _Args>
static __result_of_success<decltype(
std::declval<_Fn>()(std::declval<_Args>()...)
), __invoke_other> _S_test(int);
template<typename...>
static __failure_type _S_test(...);
};
template<typename _Functor, typename... _ArgTypes>
struct __result_of_impl<false, false, _Functor, _ArgTypes...>
: private __result_of_other_impl
{
typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type;
};
// __invoke_result (std::invoke_result for C++11)
template<typename _Functor, typename... _ArgTypes>
struct __invoke_result
: public __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
{ };
template<typename _Functor, typename... _ArgTypes>
struct result_of<_Functor(_ArgTypes...)>
: public __invoke_result<_Functor, _ArgTypes...>
{ };
#if __cplusplus >= 201402L
/// Alias template for aligned_storage
template<size_t _Len, size_t _Align =
__alignof__(typename __aligned_storage_msa<_Len>::__type)>
using aligned_storage_t = typename aligned_storage<_Len, _Align>::type;
template <size_t _Len, typename... _Types>
using aligned_union_t = typename aligned_union<_Len, _Types...>::type;
/// Alias template for decay
template<typename _Tp>
using decay_t = typename decay<_Tp>::type;
/// Alias template for enable_if
template<bool _Cond, typename _Tp = void>
using enable_if_t = typename enable_if<_Cond, _Tp>::type;
/// Alias template for conditional
template<bool _Cond, typename _Iftrue, typename _Iffalse>
using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type;
/// Alias template for common_type
template<typename... _Tp>
using common_type_t = typename common_type<_Tp...>::type;
/// Alias template for underlying_type
template<typename _Tp>
using underlying_type_t = typename underlying_type<_Tp>::type;
/// Alias template for result_of
template<typename _Tp>
using result_of_t = typename result_of<_Tp>::type;
#endif // C++14
// __enable_if_t (std::enable_if_t for C++11)
template<bool _Cond, typename _Tp = void>
using __enable_if_t = typename enable_if<_Cond, _Tp>::type;
// __void_t (std::void_t for C++11)
template<typename...> using __void_t = void;
#if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++11
#define __cpp_lib_void_t 201411
/// A metafunction that always yields void, used for detecting valid types.
template<typename...> using void_t = void;
#endif
/// Implementation of the detection idiom (negative case).
template<typename _Default, typename _AlwaysVoid,
template<typename...> class _Op, typename... _Args>
struct __detector
{
using value_t = false_type;
using type = _Default;
};
/// Implementation of the detection idiom (positive case).
template<typename _Default, template<typename...> class _Op,
typename... _Args>
struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...>
{
using value_t = true_type;
using type = _Op<_Args...>;
};
// Detect whether _Op<_Args...> is a valid type, use _Default if not.
template<typename _Default, template<typename...> class _Op,
typename... _Args>
using __detected_or = __detector<_Default, void, _Op, _Args...>;
// _Op<_Args...> if that is a valid type, otherwise _Default.
template<typename _Default, template<typename...> class _Op,
typename... _Args>
using __detected_or_t
= typename __detected_or<_Default, _Op, _Args...>::type;
/// @} group metaprogramming
/**
* Use SFINAE to determine if the type _Tp has a publicly-accessible
* member type _NTYPE.
*/
#define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \
template<typename _Tp, typename = __void_t<>> \
struct __has_##_NTYPE \
: false_type \
{ }; \
template<typename _Tp> \
struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \
: true_type \
{ };
template <typename _Tp>
struct __is_swappable;
template <typename _Tp>
struct __is_nothrow_swappable;
template<typename... _Elements>
class tuple;
template<typename>
struct __is_tuple_like_impl : false_type
{ };
template<typename... _Tps>
struct __is_tuple_like_impl<tuple<_Tps...>> : true_type
{ };
// Internal type trait that allows us to sfinae-protect tuple_cat.
template<typename _Tp>
struct __is_tuple_like
: public __is_tuple_like_impl<typename remove_cv<
typename remove_reference<_Tp>::type>::type>::type
{ };
template<typename _Tp>
inline
typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>,
is_move_constructible<_Tp>,
is_move_assignable<_Tp>>::value>::type
swap(_Tp&, _Tp&)
noexcept(__and_<is_nothrow_move_constructible<_Tp>,
is_nothrow_move_assignable<_Tp>>::value);
template<typename _Tp, size_t _Nm>
inline
typename enable_if<__is_swappable<_Tp>::value>::type
swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
noexcept(__is_nothrow_swappable<_Tp>::value);
namespace __swappable_details {
using std::swap;
struct __do_is_swappable_impl
{
template<typename _Tp, typename
= decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))>
static true_type __test(int);
template<typename>
static false_type __test(...);
};
struct __do_is_nothrow_swappable_impl
{
template<typename _Tp>
static __bool_constant<
noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))
> __test(int);
template<typename>
static false_type __test(...);
};
} // namespace __swappable_details
template<typename _Tp>
struct __is_swappable_impl
: public __swappable_details::__do_is_swappable_impl
{
typedef decltype(__test<_Tp>(0)) type;
};
template<typename _Tp>
struct __is_nothrow_swappable_impl
: public __swappable_details::__do_is_nothrow_swappable_impl
{
typedef decltype(__test<_Tp>(0)) type;
};
template<typename _Tp>
struct __is_swappable
: public __is_swappable_impl<_Tp>::type
{ };
template<typename _Tp>
struct __is_nothrow_swappable
: public __is_nothrow_swappable_impl<_Tp>::type
{ };
#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11
#define __cpp_lib_is_swappable 201603
/// Metafunctions used for detecting swappable types: p0185r1
/// is_swappable
template<typename _Tp>
struct is_swappable
: public __is_swappable_impl<_Tp>::type
{ };
/// is_nothrow_swappable
template<typename _Tp>
struct is_nothrow_swappable
: public __is_nothrow_swappable_impl<_Tp>::type
{ };
#if __cplusplus >= 201402L
/// is_swappable_v
template<typename _Tp>
_GLIBCXX17_INLINE constexpr bool is_swappable_v =
is_swappable<_Tp>::value;
/// is_nothrow_swappable_v
template<typename _Tp>
_GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_v =
is_nothrow_swappable<_Tp>::value;
#endif // __cplusplus >= 201402L
namespace __swappable_with_details {
using std::swap;
struct __do_is_swappable_with_impl
{
template<typename _Tp, typename _Up, typename
= decltype(swap(std::declval<_Tp>(), std::declval<_Up>())),
typename
= decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))>
static true_type __test(int);
template<typename, typename>
static false_type __test(...);
};
struct __do_is_nothrow_swappable_with_impl
{
template<typename _Tp, typename _Up>
static __bool_constant<
noexcept(swap(std::declval<_Tp>(), std::declval<_Up>()))
&&
noexcept(swap(std::declval<_Up>(), std::declval<_Tp>()))
> __test(int);
template<typename, typename>
static false_type __test(...);
};
} // namespace __swappable_with_details
template<typename _Tp, typename _Up>
struct __is_swappable_with_impl
: public __swappable_with_details::__do_is_swappable_with_impl
{
typedef decltype(__test<_Tp, _Up>(0)) type;
};
// Optimization for the homogenous lvalue case, not required:
template<typename _Tp>
struct __is_swappable_with_impl<_Tp&, _Tp&>
: public __swappable_details::__do_is_swappable_impl
{
typedef decltype(__test<_Tp&>(0)) type;
};
template<typename _Tp, typename _Up>
struct __is_nothrow_swappable_with_impl
: public __swappable_with_details::__do_is_nothrow_swappable_with_impl
{
typedef decltype(__test<_Tp, _Up>(0)) type;
};
// Optimization for the homogenous lvalue case, not required:
template<typename _Tp>
struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&>
: public __swappable_details::__do_is_nothrow_swappable_impl
{
typedef decltype(__test<_Tp&>(0)) type;
};
/// is_swappable_with
template<typename _Tp, typename _Up>
struct is_swappable_with
: public __is_swappable_with_impl<_Tp, _Up>::type
{ };
/// is_nothrow_swappable_with
template<typename _Tp, typename _Up>
struct is_nothrow_swappable_with
: public __is_nothrow_swappable_with_impl<_Tp, _Up>::type
{ };
#if __cplusplus >= 201402L
/// is_swappable_with_v
template<typename _Tp, typename _Up>
_GLIBCXX17_INLINE constexpr bool is_swappable_with_v =
is_swappable_with<_Tp, _Up>::value;
/// is_nothrow_swappable_with_v
template<typename _Tp, typename _Up>
_GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_with_v =
is_nothrow_swappable_with<_Tp, _Up>::value;
#endif // __cplusplus >= 201402L
#endif// c++1z or gnu++11
// __is_invocable (std::is_invocable for C++11)
template<typename _Result, typename _Ret, typename = void>
struct __is_invocable_impl : false_type { };
template<typename _Result, typename _Ret>
struct __is_invocable_impl<_Result, _Ret, __void_t<typename _Result::type>>
: __or_<is_void<_Ret>, is_convertible<typename _Result::type, _Ret>>::type
{ };
template<typename _Fn, typename... _ArgTypes>
struct __is_invocable
: __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
{ };
template<typename _Fn, typename _Tp, typename... _Args>
constexpr bool __call_is_nt(__invoke_memfun_ref)
{
using _Up = typename __inv_unwrap<_Tp>::type;
return noexcept((std::declval<_Up>().*std::declval<_Fn>())(
std::declval<_Args>()...));
}
template<typename _Fn, typename _Tp, typename... _Args>
constexpr bool __call_is_nt(__invoke_memfun_deref)
{
return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())(
std::declval<_Args>()...));
}
template<typename _Fn, typename _Tp>
constexpr bool __call_is_nt(__invoke_memobj_ref)
{
using _Up = typename __inv_unwrap<_Tp>::type;
return noexcept(std::declval<_Up>().*std::declval<_Fn>());
}
template<typename _Fn, typename _Tp>
constexpr bool __call_is_nt(__invoke_memobj_deref)
{
return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>());
}
template<typename _Fn, typename... _Args>
constexpr bool __call_is_nt(__invoke_other)
{
return noexcept(std::declval<_Fn>()(std::declval<_Args>()...));
}
template<typename _Result, typename _Fn, typename... _Args>
struct __call_is_nothrow
: __bool_constant<
std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{})
>
{ };
template<typename _Fn, typename... _Args>
using __call_is_nothrow_
= __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>;
// __is_nothrow_invocable (std::is_nothrow_invocable for C++11)
template<typename _Fn, typename... _Args>
struct __is_nothrow_invocable
: __and_<__is_invocable<_Fn, _Args...>,
__call_is_nothrow_<_Fn, _Args...>>::type
{ };
struct __nonesuch {
__nonesuch() = delete;
~__nonesuch() = delete;
__nonesuch(__nonesuch const&) = delete;
void operator=(__nonesuch const&) = delete;
};
#if __cplusplus >= 201703L
# define __cpp_lib_is_invocable 201703
/// std::invoke_result
template<typename _Functor, typename... _ArgTypes>
struct invoke_result
: public __invoke_result<_Functor, _ArgTypes...>
{ };
/// std::invoke_result_t
template<typename _Fn, typename... _Args>
using invoke_result_t = typename invoke_result<_Fn, _Args...>::type;
/// std::is_invocable
template<typename _Fn, typename... _ArgTypes>
struct is_invocable
: __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
{ };
/// std::is_invocable_r
template<typename _Ret, typename _Fn, typename... _ArgTypes>
struct is_invocable_r
: __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type
{ };
/// std::is_nothrow_invocable
template<typename _Fn, typename... _ArgTypes>
struct is_nothrow_invocable
: __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>,
__call_is_nothrow_<_Fn, _ArgTypes...>>::type
{ };
template<typename _Result, typename _Ret, typename = void>
struct __is_nt_invocable_impl : false_type { };
template<typename _Result, typename _Ret>
struct __is_nt_invocable_impl<_Result, _Ret,
__void_t<typename _Result::type>>
: __or_<is_void<_Ret>,
__and_<is_convertible<typename _Result::type, _Ret>,
is_nothrow_constructible<_Ret, typename _Result::type>>>
{ };
/// std::is_nothrow_invocable_r
template<typename _Ret, typename _Fn, typename... _ArgTypes>
struct is_nothrow_invocable_r
: __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>,
__call_is_nothrow_<_Fn, _ArgTypes...>>::type
{ };
/// std::is_invocable_v
template<typename _Fn, typename... _Args>
inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value;
/// std::is_nothrow_invocable_v
template<typename _Fn, typename... _Args>
inline constexpr bool is_nothrow_invocable_v
= is_nothrow_invocable<_Fn, _Args...>::value;
/// std::is_invocable_r_v
template<typename _Fn, typename... _Args>
inline constexpr bool is_invocable_r_v
= is_invocable_r<_Fn, _Args...>::value;
/// std::is_nothrow_invocable_r_v
template<typename _Fn, typename... _Args>
inline constexpr bool is_nothrow_invocable_r_v
= is_nothrow_invocable_r<_Fn, _Args...>::value;
#endif // C++17
#if __cplusplus >= 201703L
# define __cpp_lib_type_trait_variable_templates 201510L
template <typename _Tp>
inline constexpr bool is_void_v = is_void<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_integral_v = is_integral<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_array_v = is_array<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_pointer_v = is_pointer<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_lvalue_reference_v =
is_lvalue_reference<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_rvalue_reference_v =
is_rvalue_reference<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_member_object_pointer_v =
is_member_object_pointer<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_member_function_pointer_v =
is_member_function_pointer<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_enum_v = is_enum<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_union_v = is_union<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_class_v = is_class<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_function_v = is_function<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_reference_v = is_reference<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_object_v = is_object<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_scalar_v = is_scalar<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_compound_v = is_compound<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_const_v = is_const<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_volatile_v = is_volatile<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_trivial_v = is_trivial<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_trivially_copyable_v =
is_trivially_copyable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_pod_v = is_pod<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_empty_v = is_empty<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_abstract_v = is_abstract<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_final_v = is_final<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_signed_v = is_signed<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;
template <typename _Tp, typename... _Args>
inline constexpr bool is_constructible_v =
is_constructible<_Tp, _Args...>::value;
template <typename _Tp>
inline constexpr bool is_default_constructible_v =
is_default_constructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_copy_constructible_v =
is_copy_constructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_move_constructible_v =
is_move_constructible<_Tp>::value;
template <typename _Tp, typename _Up>
inline constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value;
template <typename _Tp>
inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_destructible_v = is_destructible<_Tp>::value;
template <typename _Tp, typename... _Args>
inline constexpr bool is_trivially_constructible_v =
is_trivially_constructible<_Tp, _Args...>::value;
template <typename _Tp>
inline constexpr bool is_trivially_default_constructible_v =
is_trivially_default_constructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_trivially_copy_constructible_v =
is_trivially_copy_constructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_trivially_move_constructible_v =
is_trivially_move_constructible<_Tp>::value;
template <typename _Tp, typename _Up>
inline constexpr bool is_trivially_assignable_v =
is_trivially_assignable<_Tp, _Up>::value;
template <typename _Tp>
inline constexpr bool is_trivially_copy_assignable_v =
is_trivially_copy_assignable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_trivially_move_assignable_v =
is_trivially_move_assignable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_trivially_destructible_v =
is_trivially_destructible<_Tp>::value;
template <typename _Tp, typename... _Args>
inline constexpr bool is_nothrow_constructible_v =
is_nothrow_constructible<_Tp, _Args...>::value;
template <typename _Tp>
inline constexpr bool is_nothrow_default_constructible_v =
is_nothrow_default_constructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_nothrow_copy_constructible_v =
is_nothrow_copy_constructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_nothrow_move_constructible_v =
is_nothrow_move_constructible<_Tp>::value;
template <typename _Tp, typename _Up>
inline constexpr bool is_nothrow_assignable_v =
is_nothrow_assignable<_Tp, _Up>::value;
template <typename _Tp>
inline constexpr bool is_nothrow_copy_assignable_v =
is_nothrow_copy_assignable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_nothrow_move_assignable_v =
is_nothrow_move_assignable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_nothrow_destructible_v =
is_nothrow_destructible<_Tp>::value;
template <typename _Tp>
inline constexpr bool has_virtual_destructor_v =
has_virtual_destructor<_Tp>::value;
template <typename _Tp>
inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value;
template <typename _Tp>
inline constexpr size_t rank_v = rank<_Tp>::value;
template <typename _Tp, unsigned _Idx = 0>
inline constexpr size_t extent_v = extent<_Tp, _Idx>::value;
template <typename _Tp, typename _Up>
inline constexpr bool is_same_v = is_same<_Tp, _Up>::value;
template <typename _Base, typename _Derived>
inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value;
template <typename _From, typename _To>
inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value;
#if __GNUC__ >= 7
# define _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP 1
#elif defined(__is_identifier)
// For non-GNU compilers:
# if ! __is_identifier(__has_unique_object_representations)
# define _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP 1
# endif
#endif
#ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP
# define __cpp_lib_has_unique_object_representations 201606
/// has_unique_object_representations
template<typename _Tp>
struct has_unique_object_representations
: bool_constant<__has_unique_object_representations(
remove_cv_t<remove_all_extents_t<_Tp>>
)>
{ };
template<typename _Tp>
inline constexpr bool has_unique_object_representations_v
= has_unique_object_representations<_Tp>::value;
#endif
#undef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP
#if __GNUC__ >= 7
# define _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE 1
#elif defined(__is_identifier)
// For non-GNU compilers:
# if ! __is_identifier(__is_aggregate)
# define _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE 1
# endif
#endif
#ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE
#define __cpp_lib_is_aggregate 201703
/// is_aggregate
template<typename _Tp>
struct is_aggregate
: bool_constant<__is_aggregate(remove_cv_t<_Tp>)> { };
/// is_aggregate_v
template<typename _Tp>
inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value;
#endif
#undef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE
#endif // C++17
#if __cplusplus > 201703L
/// Byte order
enum class endian
{
little = __ORDER_LITTLE_ENDIAN__,
big = __ORDER_BIG_ENDIAN__,
native = __BYTE_ORDER__
};
#endif // C++2a
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++11
#endif // _GLIBCXX_TYPE_TRAITS