| // -*- C++ -*- |
| //===------------------------ type_traits ---------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP_TYPE_TRAITS |
| #define _LIBCPP_TYPE_TRAITS |
| |
| /* |
| type_traits synopsis |
| |
| namespace std |
| { |
| |
| // helper class: |
| template <class T, T v> struct integral_constant; |
| typedef integral_constant<bool, true> true_type; // C++11 |
| typedef integral_constant<bool, false> false_type; // C++11 |
| |
| template <bool B> // C++14 |
| using bool_constant = integral_constant<bool, B>; // C++14 |
| typedef bool_constant<true> true_type; // C++14 |
| typedef bool_constant<false> false_type; // C++14 |
| |
| // helper traits |
| template <bool, class T = void> struct enable_if; |
| template <bool, class T, class F> struct conditional; |
| |
| // Primary classification traits: |
| template <class T> struct is_void; |
| template <class T> struct is_null_pointer; // C++14 |
| template <class T> struct is_integral; |
| template <class T> struct is_floating_point; |
| template <class T> struct is_array; |
| template <class T> struct is_pointer; |
| template <class T> struct is_lvalue_reference; |
| template <class T> struct is_rvalue_reference; |
| template <class T> struct is_member_object_pointer; |
| template <class T> struct is_member_function_pointer; |
| template <class T> struct is_enum; |
| template <class T> struct is_union; |
| template <class T> struct is_class; |
| template <class T> struct is_function; |
| |
| // Secondary classification traits: |
| template <class T> struct is_reference; |
| template <class T> struct is_arithmetic; |
| template <class T> struct is_fundamental; |
| template <class T> struct is_member_pointer; |
| template <class T> struct is_scalar; |
| template <class T> struct is_object; |
| template <class T> struct is_compound; |
| |
| // Const-volatile properties and transformations: |
| template <class T> struct is_const; |
| template <class T> struct is_volatile; |
| template <class T> struct remove_const; |
| template <class T> struct remove_volatile; |
| template <class T> struct remove_cv; |
| template <class T> struct add_const; |
| template <class T> struct add_volatile; |
| template <class T> struct add_cv; |
| |
| // Reference transformations: |
| template <class T> struct remove_reference; |
| template <class T> struct add_lvalue_reference; |
| template <class T> struct add_rvalue_reference; |
| |
| // Pointer transformations: |
| template <class T> struct remove_pointer; |
| template <class T> struct add_pointer; |
| |
| template<class T> struct type_identity; // C++20 |
| template<class T> |
| using type_identity_t = typename type_identity<T>::type; // C++20 |
| |
| // Integral properties: |
| template <class T> struct is_signed; |
| template <class T> struct is_unsigned; |
| template <class T> struct make_signed; |
| template <class T> struct make_unsigned; |
| |
| // Array properties and transformations: |
| template <class T> struct rank; |
| template <class T, unsigned I = 0> struct extent; |
| template <class T> struct remove_extent; |
| template <class T> struct remove_all_extents; |
| |
| template <class T> struct is_bounded_array; // C++20 |
| template <class T> struct is_unbounded_array; // C++20 |
| |
| // Member introspection: |
| template <class T> struct is_pod; |
| template <class T> struct is_trivial; |
| template <class T> struct is_trivially_copyable; |
| template <class T> struct is_standard_layout; |
| template <class T> struct is_literal_type; |
| template <class T> struct is_empty; |
| template <class T> struct is_polymorphic; |
| template <class T> struct is_abstract; |
| template <class T> struct is_final; // C++14 |
| template <class T> struct is_aggregate; // C++17 |
| |
| template <class T, class... Args> struct is_constructible; |
| template <class T> struct is_default_constructible; |
| template <class T> struct is_copy_constructible; |
| template <class T> struct is_move_constructible; |
| template <class T, class U> struct is_assignable; |
| template <class T> struct is_copy_assignable; |
| template <class T> struct is_move_assignable; |
| template <class T, class U> struct is_swappable_with; // C++17 |
| template <class T> struct is_swappable; // C++17 |
| template <class T> struct is_destructible; |
| |
| template <class T, class... Args> struct is_trivially_constructible; |
| template <class T> struct is_trivially_default_constructible; |
| template <class T> struct is_trivially_copy_constructible; |
| template <class T> struct is_trivially_move_constructible; |
| template <class T, class U> struct is_trivially_assignable; |
| template <class T> struct is_trivially_copy_assignable; |
| template <class T> struct is_trivially_move_assignable; |
| template <class T> struct is_trivially_destructible; |
| |
| template <class T, class... Args> struct is_nothrow_constructible; |
| template <class T> struct is_nothrow_default_constructible; |
| template <class T> struct is_nothrow_copy_constructible; |
| template <class T> struct is_nothrow_move_constructible; |
| template <class T, class U> struct is_nothrow_assignable; |
| template <class T> struct is_nothrow_copy_assignable; |
| template <class T> struct is_nothrow_move_assignable; |
| template <class T, class U> struct is_nothrow_swappable_with; // C++17 |
| template <class T> struct is_nothrow_swappable; // C++17 |
| template <class T> struct is_nothrow_destructible; |
| |
| template <class T> struct has_virtual_destructor; |
| |
| template<class T> struct has_unique_object_representations; // C++17 |
| |
| // Relationships between types: |
| template <class T, class U> struct is_same; |
| template <class Base, class Derived> struct is_base_of; |
| |
| template <class From, class To> struct is_convertible; |
| template <typename From, typename To> struct is_nothrow_convertible; // C++20 |
| template <typename From, typename To> inline constexpr bool is_nothrow_convertible_v; // C++20 |
| |
| template <class Fn, class... ArgTypes> struct is_invocable; |
| template <class R, class Fn, class... ArgTypes> struct is_invocable_r; |
| |
| template <class Fn, class... ArgTypes> struct is_nothrow_invocable; |
| template <class R, class Fn, class... ArgTypes> struct is_nothrow_invocable_r; |
| |
| // Alignment properties and transformations: |
| template <class T> struct alignment_of; |
| template <size_t Len, size_t Align = most_stringent_alignment_requirement> |
| struct aligned_storage; |
| template <size_t Len, class... Types> struct aligned_union; |
| template <class T> struct remove_cvref; // C++20 |
| |
| template <class T> struct decay; |
| template <class... T> struct common_type; |
| template <class T> struct underlying_type; |
| template <class> class result_of; // undefined |
| template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; |
| template <class Fn, class... ArgTypes> struct invoke_result; // C++17 |
| |
| // const-volatile modifications: |
| template <class T> |
| using remove_const_t = typename remove_const<T>::type; // C++14 |
| template <class T> |
| using remove_volatile_t = typename remove_volatile<T>::type; // C++14 |
| template <class T> |
| using remove_cv_t = typename remove_cv<T>::type; // C++14 |
| template <class T> |
| using add_const_t = typename add_const<T>::type; // C++14 |
| template <class T> |
| using add_volatile_t = typename add_volatile<T>::type; // C++14 |
| template <class T> |
| using add_cv_t = typename add_cv<T>::type; // C++14 |
| |
| // reference modifications: |
| template <class T> |
| using remove_reference_t = typename remove_reference<T>::type; // C++14 |
| template <class T> |
| using add_lvalue_reference_t = typename add_lvalue_reference<T>::type; // C++14 |
| template <class T> |
| using add_rvalue_reference_t = typename add_rvalue_reference<T>::type; // C++14 |
| |
| // sign modifications: |
| template <class T> |
| using make_signed_t = typename make_signed<T>::type; // C++14 |
| template <class T> |
| using make_unsigned_t = typename make_unsigned<T>::type; // C++14 |
| |
| // array modifications: |
| template <class T> |
| using remove_extent_t = typename remove_extent<T>::type; // C++14 |
| template <class T> |
| using remove_all_extents_t = typename remove_all_extents<T>::type; // C++14 |
| |
| template <class T> |
| inline constexpr bool is_bounded_array_v |
| = is_bounded_array<T>::value; // C++20 |
| inline constexpr bool is_unbounded_array_v |
| = is_unbounded_array<T>::value; // C++20 |
| |
| // pointer modifications: |
| template <class T> |
| using remove_pointer_t = typename remove_pointer<T>::type; // C++14 |
| template <class T> |
| using add_pointer_t = typename add_pointer<T>::type; // C++14 |
| |
| // other transformations: |
| template <size_t Len, std::size_t Align=default-alignment> |
| using aligned_storage_t = typename aligned_storage<Len,Align>::type; // C++14 |
| template <std::size_t Len, class... Types> |
| using aligned_union_t = typename aligned_union<Len,Types...>::type; // C++14 |
| template <class T> |
| using remove_cvref_t = typename remove_cvref<T>::type; // C++20 |
| template <class T> |
| using decay_t = typename decay<T>::type; // C++14 |
| template <bool b, class T=void> |
| using enable_if_t = typename enable_if<b,T>::type; // C++14 |
| template <bool b, class T, class F> |
| using conditional_t = typename conditional<b,T,F>::type; // C++14 |
| template <class... T> |
| using common_type_t = typename common_type<T...>::type; // C++14 |
| template <class T> |
| using underlying_type_t = typename underlying_type<T>::type; // C++14 |
| template <class T> |
| using result_of_t = typename result_of<T>::type; // C++14 |
| template <class Fn, class... ArgTypes> |
| using invoke_result_t = typename invoke_result<Fn, ArgTypes...>::type; // C++17 |
| |
| template <class...> |
| using void_t = void; // C++17 |
| |
| // See C++14 20.10.4.1, primary type categories |
| template <class T> inline constexpr bool is_void_v |
| = is_void<T>::value; // C++17 |
| template <class T> inline constexpr bool is_null_pointer_v |
| = is_null_pointer<T>::value; // C++17 |
| template <class T> inline constexpr bool is_integral_v |
| = is_integral<T>::value; // C++17 |
| template <class T> inline constexpr bool is_floating_point_v |
| = is_floating_point<T>::value; // C++17 |
| template <class T> inline constexpr bool is_array_v |
| = is_array<T>::value; // C++17 |
| template <class T> inline constexpr bool is_pointer_v |
| = is_pointer<T>::value; // C++17 |
| template <class T> inline constexpr bool is_lvalue_reference_v |
| = is_lvalue_reference<T>::value; // C++17 |
| template <class T> inline constexpr bool is_rvalue_reference_v |
| = is_rvalue_reference<T>::value; // C++17 |
| template <class T> inline constexpr bool is_member_object_pointer_v |
| = is_member_object_pointer<T>::value; // C++17 |
| template <class T> inline constexpr bool is_member_function_pointer_v |
| = is_member_function_pointer<T>::value; // C++17 |
| template <class T> inline constexpr bool is_enum_v |
| = is_enum<T>::value; // C++17 |
| template <class T> inline constexpr bool is_union_v |
| = is_union<T>::value; // C++17 |
| template <class T> inline constexpr bool is_class_v |
| = is_class<T>::value; // C++17 |
| template <class T> inline constexpr bool is_function_v |
| = is_function<T>::value; // C++17 |
| |
| // See C++14 20.10.4.2, composite type categories |
| template <class T> inline constexpr bool is_reference_v |
| = is_reference<T>::value; // C++17 |
| template <class T> inline constexpr bool is_arithmetic_v |
| = is_arithmetic<T>::value; // C++17 |
| template <class T> inline constexpr bool is_fundamental_v |
| = is_fundamental<T>::value; // C++17 |
| template <class T> inline constexpr bool is_object_v |
| = is_object<T>::value; // C++17 |
| template <class T> inline constexpr bool is_scalar_v |
| = is_scalar<T>::value; // C++17 |
| template <class T> inline constexpr bool is_compound_v |
| = is_compound<T>::value; // C++17 |
| template <class T> inline constexpr bool is_member_pointer_v |
| = is_member_pointer<T>::value; // C++17 |
| |
| // See C++14 20.10.4.3, type properties |
| template <class T> inline constexpr bool is_const_v |
| = is_const<T>::value; // C++17 |
| template <class T> inline constexpr bool is_volatile_v |
| = is_volatile<T>::value; // C++17 |
| template <class T> inline constexpr bool is_trivial_v |
| = is_trivial<T>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_copyable_v |
| = is_trivially_copyable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_standard_layout_v |
| = is_standard_layout<T>::value; // C++17 |
| template <class T> inline constexpr bool is_pod_v |
| = is_pod<T>::value; // C++17 |
| template <class T> inline constexpr bool is_literal_type_v |
| = is_literal_type<T>::value; // C++17 |
| template <class T> inline constexpr bool is_empty_v |
| = is_empty<T>::value; // C++17 |
| template <class T> inline constexpr bool is_polymorphic_v |
| = is_polymorphic<T>::value; // C++17 |
| template <class T> inline constexpr bool is_abstract_v |
| = is_abstract<T>::value; // C++17 |
| template <class T> inline constexpr bool is_final_v |
| = is_final<T>::value; // C++17 |
| template <class T> inline constexpr bool is_aggregate_v |
| = is_aggregate<T>::value; // C++17 |
| template <class T> inline constexpr bool is_signed_v |
| = is_signed<T>::value; // C++17 |
| template <class T> inline constexpr bool is_unsigned_v |
| = is_unsigned<T>::value; // C++17 |
| template <class T, class... Args> inline constexpr bool is_constructible_v |
| = is_constructible<T, Args...>::value; // C++17 |
| template <class T> inline constexpr bool is_default_constructible_v |
| = is_default_constructible<T>::value; // C++17 |
| template <class T> inline constexpr bool is_copy_constructible_v |
| = is_copy_constructible<T>::value; // C++17 |
| template <class T> inline constexpr bool is_move_constructible_v |
| = is_move_constructible<T>::value; // C++17 |
| template <class T, class U> inline constexpr bool is_assignable_v |
| = is_assignable<T, U>::value; // C++17 |
| template <class T> inline constexpr bool is_copy_assignable_v |
| = is_copy_assignable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_move_assignable_v |
| = is_move_assignable<T>::value; // C++17 |
| template <class T, class U> inline constexpr bool is_swappable_with_v |
| = is_swappable_with<T, U>::value; // C++17 |
| template <class T> inline constexpr bool is_swappable_v |
| = is_swappable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_destructible_v |
| = is_destructible<T>::value; // C++17 |
| template <class T, class... Args> inline constexpr bool is_trivially_constructible_v |
| = is_trivially_constructible<T, Args...>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_default_constructible_v |
| = is_trivially_default_constructible<T>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_copy_constructible_v |
| = is_trivially_copy_constructible<T>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_move_constructible_v |
| = is_trivially_move_constructible<T>::value; // C++17 |
| template <class T, class U> inline constexpr bool is_trivially_assignable_v |
| = is_trivially_assignable<T, U>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_copy_assignable_v |
| = is_trivially_copy_assignable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_move_assignable_v |
| = is_trivially_move_assignable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_trivially_destructible_v |
| = is_trivially_destructible<T>::value; // C++17 |
| template <class T, class... Args> inline constexpr bool is_nothrow_constructible_v |
| = is_nothrow_constructible<T, Args...>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_default_constructible_v |
| = is_nothrow_default_constructible<T>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_copy_constructible_v |
| = is_nothrow_copy_constructible<T>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_move_constructible_v |
| = is_nothrow_move_constructible<T>::value; // C++17 |
| template <class T, class U> inline constexpr bool is_nothrow_assignable_v |
| = is_nothrow_assignable<T, U>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_copy_assignable_v |
| = is_nothrow_copy_assignable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_move_assignable_v |
| = is_nothrow_move_assignable<T>::value; // C++17 |
| template <class T, class U> inline constexpr bool is_nothrow_swappable_with_v |
| = is_nothrow_swappable_with<T, U>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_swappable_v |
| = is_nothrow_swappable<T>::value; // C++17 |
| template <class T> inline constexpr bool is_nothrow_destructible_v |
| = is_nothrow_destructible<T>::value; // C++17 |
| template <class T> inline constexpr bool has_virtual_destructor_v |
| = has_virtual_destructor<T>::value; // C++17 |
| template<class T> inline constexpr bool has_unique_object_representations_v // C++17 |
| = has_unique_object_representations<T>::value; |
| |
| // See C++14 20.10.5, type property queries |
| template <class T> inline constexpr size_t alignment_of_v |
| = alignment_of<T>::value; // C++17 |
| template <class T> inline constexpr size_t rank_v |
| = rank<T>::value; // C++17 |
| template <class T, unsigned I = 0> inline constexpr size_t extent_v |
| = extent<T, I>::value; // C++17 |
| |
| // See C++14 20.10.6, type relations |
| template <class T, class U> inline constexpr bool is_same_v |
| = is_same<T, U>::value; // C++17 |
| template <class Base, class Derived> inline constexpr bool is_base_of_v |
| = is_base_of<Base, Derived>::value; // C++17 |
| template <class From, class To> inline constexpr bool is_convertible_v |
| = is_convertible<From, To>::value; // C++17 |
| template <class Fn, class... ArgTypes> inline constexpr bool is_invocable_v |
| = is_invocable<Fn, ArgTypes...>::value; // C++17 |
| template <class R, class Fn, class... ArgTypes> inline constexpr bool is_invocable_r_v |
| = is_invocable_r<R, Fn, ArgTypes...>::value; // C++17 |
| template <class Fn, class... ArgTypes> inline constexpr bool is_nothrow_invocable_v |
| = is_nothrow_invocable<Fn, ArgTypes...>::value; // C++17 |
| template <class R, class Fn, class... ArgTypes> inline constexpr bool is_nothrow_invocable_r_v |
| = is_nothrow_invocable_r<R, Fn, ArgTypes...>::value; // C++17 |
| |
| // [meta.logical], logical operator traits: |
| template<class... B> struct conjunction; // C++17 |
| template<class... B> |
| inline constexpr bool conjunction_v = conjunction<B...>::value; // C++17 |
| template<class... B> struct disjunction; // C++17 |
| template<class... B> |
| inline constexpr bool disjunction_v = disjunction<B...>::value; // C++17 |
| template<class B> struct negation; // C++17 |
| template<class B> |
| inline constexpr bool negation_v = negation<B>::value; // C++17 |
| |
| } |
| |
| */ |
| #include <__config> |
| #include <cstddef> |
| #include <version> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS pair; |
| template <class _Tp> class _LIBCPP_TEMPLATE_VIS reference_wrapper; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS hash; |
| |
| template <class> |
| struct __void_t { typedef void type; }; |
| |
| template <class _Tp> |
| struct __identity { typedef _Tp type; }; |
| |
| template <class _Tp, bool> |
| struct _LIBCPP_TEMPLATE_VIS __dependent_type : public _Tp {}; |
| |
| template <bool _Bp, class _If, class _Then> |
| struct _LIBCPP_TEMPLATE_VIS conditional {typedef _If type;}; |
| template <class _If, class _Then> |
| struct _LIBCPP_TEMPLATE_VIS conditional<false, _If, _Then> {typedef _Then type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <bool _Bp, class _If, class _Then> using conditional_t = typename conditional<_Bp, _If, _Then>::type; |
| #endif |
| |
| template <bool, class _Tp> struct _LIBCPP_TEMPLATE_VIS __lazy_enable_if {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __lazy_enable_if<true, _Tp> {typedef typename _Tp::type type;}; |
| |
| template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS enable_if<true, _Tp> {typedef _Tp type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp, _Tp>::type; |
| #endif |
| |
| // addressof |
| #ifndef _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF |
| |
| template <class _Tp> |
| inline _LIBCPP_CONSTEXPR_AFTER_CXX14 |
| _LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY |
| _Tp* |
| addressof(_Tp& __x) _NOEXCEPT |
| { |
| return __builtin_addressof(__x); |
| } |
| |
| #else |
| |
| template <class _Tp> |
| inline _LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY |
| _Tp* |
| addressof(_Tp& __x) _NOEXCEPT |
| { |
| return reinterpret_cast<_Tp *>( |
| const_cast<char *>(&reinterpret_cast<const volatile char &>(__x))); |
| } |
| |
| #endif // _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF |
| |
| #if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF) |
| // Objective-C++ Automatic Reference Counting uses qualified pointers |
| // that require special addressof() signatures. When |
| // _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler |
| // itself is providing these definitions. Otherwise, we provide them. |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __strong _Tp* |
| addressof(__strong _Tp& __x) _NOEXCEPT |
| { |
| return &__x; |
| } |
| |
| #ifdef _LIBCPP_HAS_OBJC_ARC_WEAK |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __weak _Tp* |
| addressof(__weak _Tp& __x) _NOEXCEPT |
| { |
| return &__x; |
| } |
| #endif |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __autoreleasing _Tp* |
| addressof(__autoreleasing _Tp& __x) _NOEXCEPT |
| { |
| return &__x; |
| } |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| __unsafe_unretained _Tp* |
| addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT |
| { |
| return &__x; |
| } |
| #endif |
| |
| #if !defined(_LIBCPP_CXX03_LANG) |
| template <class _Tp> _Tp* addressof(const _Tp&&) noexcept = delete; |
| #endif |
| |
| struct __two {char __lx[2];}; |
| |
| // helper class: |
| |
| template <class _Tp, _Tp __v> |
| struct _LIBCPP_TEMPLATE_VIS integral_constant |
| { |
| static _LIBCPP_CONSTEXPR const _Tp value = __v; |
| typedef _Tp value_type; |
| typedef integral_constant type; |
| _LIBCPP_INLINE_VISIBILITY |
| _LIBCPP_CONSTEXPR operator value_type() const _NOEXCEPT {return value;} |
| #if _LIBCPP_STD_VER > 11 |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr value_type operator ()() const _NOEXCEPT {return value;} |
| #endif |
| }; |
| |
| template <class _Tp, _Tp __v> |
| _LIBCPP_CONSTEXPR const _Tp integral_constant<_Tp, __v>::value; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <bool __b> |
| using bool_constant = integral_constant<bool, __b>; |
| #define _LIBCPP_BOOL_CONSTANT(__b) bool_constant<(__b)> |
| #else |
| #define _LIBCPP_BOOL_CONSTANT(__b) integral_constant<bool,(__b)> |
| #endif |
| |
| typedef _LIBCPP_BOOL_CONSTANT(true) true_type; |
| typedef _LIBCPP_BOOL_CONSTANT(false) false_type; |
| |
| #if !defined(_LIBCPP_CXX03_LANG) |
| |
| // __lazy_and |
| |
| template <bool _Last, class ..._Preds> |
| struct __lazy_and_impl; |
| |
| template <class ..._Preds> |
| struct __lazy_and_impl<false, _Preds...> : false_type {}; |
| |
| template <> |
| struct __lazy_and_impl<true> : true_type {}; |
| |
| template <class _Pred> |
| struct __lazy_and_impl<true, _Pred> : integral_constant<bool, _Pred::type::value> {}; |
| |
| template <class _Hp, class ..._Tp> |
| struct __lazy_and_impl<true, _Hp, _Tp...> : __lazy_and_impl<_Hp::type::value, _Tp...> {}; |
| |
| template <class _P1, class ..._Pr> |
| struct __lazy_and : __lazy_and_impl<_P1::type::value, _Pr...> {}; |
| |
| // __lazy_or |
| |
| template <bool _List, class ..._Preds> |
| struct __lazy_or_impl; |
| |
| template <class ..._Preds> |
| struct __lazy_or_impl<true, _Preds...> : true_type {}; |
| |
| template <> |
| struct __lazy_or_impl<false> : false_type {}; |
| |
| template <class _Hp, class ..._Tp> |
| struct __lazy_or_impl<false, _Hp, _Tp...> |
| : __lazy_or_impl<_Hp::type::value, _Tp...> {}; |
| |
| template <class _P1, class ..._Pr> |
| struct __lazy_or : __lazy_or_impl<_P1::type::value, _Pr...> {}; |
| |
| // __lazy_not |
| |
| template <class _Pred> |
| struct __lazy_not : integral_constant<bool, !_Pred::type::value> {}; |
| |
| // __and_ |
| template<class...> struct __and_; |
| template<> struct __and_<> : true_type {}; |
| |
| template<class _B0> struct __and_<_B0> : _B0 {}; |
| |
| template<class _B0, class _B1> |
| struct __and_<_B0, _B1> : conditional<_B0::value, _B1, _B0>::type {}; |
| |
| template<class _B0, class _B1, class _B2, class... _Bn> |
| struct __and_<_B0, _B1, _B2, _Bn...> |
| : conditional<_B0::value, __and_<_B1, _B2, _Bn...>, _B0>::type {}; |
| |
| // __or_ |
| template<class...> struct __or_; |
| template<> struct __or_<> : false_type {}; |
| |
| template<class _B0> struct __or_<_B0> : _B0 {}; |
| |
| template<class _B0, class _B1> |
| struct __or_<_B0, _B1> : conditional<_B0::value, _B0, _B1>::type {}; |
| |
| template<class _B0, class _B1, class _B2, class... _Bn> |
| struct __or_<_B0, _B1, _B2, _Bn...> |
| : conditional<_B0::value, _B0, __or_<_B1, _B2, _Bn...> >::type {}; |
| |
| // __not_ |
| template<class _Tp> |
| struct __not_ : conditional<_Tp::value, false_type, true_type>::type {}; |
| |
| #endif // !defined(_LIBCPP_CXX03_LANG) |
| |
| // is_const |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const<_Tp const> : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_const_v |
| = is_const<_Tp>::value; |
| #endif |
| |
| // is_volatile |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile<_Tp volatile> : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_volatile_v |
| = is_volatile<_Tp>::value; |
| #endif |
| |
| // remove_const |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const {typedef _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const<const _Tp> {typedef _Tp type;}; |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_const_t = typename remove_const<_Tp>::type; |
| #endif |
| |
| // remove_volatile |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile {typedef _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile<volatile _Tp> {typedef _Tp type;}; |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_volatile_t = typename remove_volatile<_Tp>::type; |
| #endif |
| |
| // remove_cv |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_cv |
| {typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;}; |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_cv_t = typename remove_cv<_Tp>::type; |
| #endif |
| |
| // is_void |
| |
| template <class _Tp> struct __libcpp_is_void : public false_type {}; |
| template <> struct __libcpp_is_void<void> : public true_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_void |
| : public __libcpp_is_void<typename remove_cv<_Tp>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_void_v |
| = is_void<_Tp>::value; |
| #endif |
| |
| // __is_nullptr_t |
| |
| template <class _Tp> struct __is_nullptr_t_impl : public false_type {}; |
| template <> struct __is_nullptr_t_impl<nullptr_t> : public true_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __is_nullptr_t |
| : public __is_nullptr_t_impl<typename remove_cv<_Tp>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_null_pointer |
| : public __is_nullptr_t_impl<typename remove_cv<_Tp>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_null_pointer_v |
| = is_null_pointer<_Tp>::value; |
| #endif |
| #endif |
| |
| // is_integral |
| |
| template <class _Tp> struct __libcpp_is_integral : public false_type {}; |
| template <> struct __libcpp_is_integral<bool> : public true_type {}; |
| template <> struct __libcpp_is_integral<char> : public true_type {}; |
| template <> struct __libcpp_is_integral<signed char> : public true_type {}; |
| template <> struct __libcpp_is_integral<unsigned char> : public true_type {}; |
| template <> struct __libcpp_is_integral<wchar_t> : public true_type {}; |
| #ifndef _LIBCPP_NO_HAS_CHAR8_T |
| template <> struct __libcpp_is_integral<char8_t> : public true_type {}; |
| #endif |
| #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS |
| template <> struct __libcpp_is_integral<char16_t> : public true_type {}; |
| template <> struct __libcpp_is_integral<char32_t> : public true_type {}; |
| #endif // _LIBCPP_HAS_NO_UNICODE_CHARS |
| template <> struct __libcpp_is_integral<short> : public true_type {}; |
| template <> struct __libcpp_is_integral<unsigned short> : public true_type {}; |
| template <> struct __libcpp_is_integral<int> : public true_type {}; |
| template <> struct __libcpp_is_integral<unsigned int> : public true_type {}; |
| template <> struct __libcpp_is_integral<long> : public true_type {}; |
| template <> struct __libcpp_is_integral<unsigned long> : public true_type {}; |
| template <> struct __libcpp_is_integral<long long> : public true_type {}; |
| template <> struct __libcpp_is_integral<unsigned long long> : public true_type {}; |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| template <> struct __libcpp_is_integral<__int128_t> : public true_type {}; |
| template <> struct __libcpp_is_integral<__uint128_t> : public true_type {}; |
| #endif |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_integral |
| : public __libcpp_is_integral<typename remove_cv<_Tp>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_integral_v |
| = is_integral<_Tp>::value; |
| #endif |
| |
| // is_floating_point |
| |
| template <class _Tp> struct __libcpp_is_floating_point : public false_type {}; |
| template <> struct __libcpp_is_floating_point<float> : public true_type {}; |
| template <> struct __libcpp_is_floating_point<double> : public true_type {}; |
| template <> struct __libcpp_is_floating_point<long double> : public true_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_floating_point |
| : public __libcpp_is_floating_point<typename remove_cv<_Tp>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_floating_point_v |
| = is_floating_point<_Tp>::value; |
| #endif |
| |
| // is_array |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_array |
| : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[]> |
| : public true_type {}; |
| template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[_Np]> |
| : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_array_v |
| = is_array<_Tp>::value; |
| #endif |
| |
| // is_pointer |
| |
| template <class _Tp> struct __libcpp_is_pointer : public false_type {}; |
| template <class _Tp> struct __libcpp_is_pointer<_Tp*> : public true_type {}; |
| |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers { typedef _Tp type; }; |
| #if defined(_LIBCPP_HAS_OBJC_ARC) |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __strong> { typedef _Tp type; }; |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __weak> { typedef _Tp type; }; |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __autoreleasing> { typedef _Tp type; }; |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __unsafe_unretained> { typedef _Tp type; }; |
| #endif |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pointer |
| : public __libcpp_is_pointer<typename __libcpp_remove_objc_qualifiers<typename remove_cv<_Tp>::type>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pointer_v |
| = is_pointer<_Tp>::value; |
| #endif |
| |
| // is_reference |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference<_Tp&> : public true_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference<_Tp&&> : public true_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&> : public true_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&&> : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_reference_v |
| = is_reference<_Tp>::value; |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_lvalue_reference_v |
| = is_lvalue_reference<_Tp>::value; |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_rvalue_reference_v |
| = is_rvalue_reference<_Tp>::value; |
| #endif |
| // is_union |
| |
| #if __has_feature(is_union) || defined(_LIBCPP_COMPILER_GCC) |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union |
| : public integral_constant<bool, __is_union(_Tp)> {}; |
| |
| #else |
| |
| template <class _Tp> struct __libcpp_union : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union |
| : public __libcpp_union<typename remove_cv<_Tp>::type> {}; |
| |
| #endif |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_union_v |
| = is_union<_Tp>::value; |
| #endif |
| |
| // is_class |
| |
| #if __has_feature(is_class) || defined(_LIBCPP_COMPILER_GCC) |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class |
| : public integral_constant<bool, __is_class(_Tp)> {}; |
| |
| #else |
| |
| namespace __is_class_imp |
| { |
| template <class _Tp> char __test(int _Tp::*); |
| template <class _Tp> __two __test(...); |
| } |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class |
| : public integral_constant<bool, sizeof(__is_class_imp::__test<_Tp>(0)) == 1 && !is_union<_Tp>::value> {}; |
| |
| #endif |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_class_v |
| = is_class<_Tp>::value; |
| #endif |
| |
| // is_same |
| |
| template <class _Tp, class _Up> struct _LIBCPP_TEMPLATE_VIS is_same : public false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_same<_Tp, _Tp> : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp, class _Up> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_same_v |
| = is_same<_Tp, _Up>::value; |
| #endif |
| |
| // is_function |
| |
| namespace __libcpp_is_function_imp |
| { |
| struct __dummy_type {}; |
| template <class _Tp> char __test(_Tp*); |
| template <class _Tp> char __test(__dummy_type); |
| template <class _Tp> __two __test(...); |
| template <class _Tp> _Tp& __source(int); |
| template <class _Tp> __dummy_type __source(...); |
| } |
| |
| template <class _Tp, bool = is_class<_Tp>::value || |
| is_union<_Tp>::value || |
| is_void<_Tp>::value || |
| is_reference<_Tp>::value || |
| __is_nullptr_t<_Tp>::value > |
| struct __libcpp_is_function |
| : public integral_constant<bool, sizeof(__libcpp_is_function_imp::__test<_Tp>(__libcpp_is_function_imp::__source<_Tp>(0))) == 1> |
| {}; |
| template <class _Tp> struct __libcpp_is_function<_Tp, true> : public false_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_function |
| : public __libcpp_is_function<_Tp> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_function_v |
| = is_function<_Tp>::value; |
| #endif |
| |
| // is_member_function_pointer |
| |
| // template <class _Tp> struct __libcpp_is_member_function_pointer : public false_type {}; |
| // template <class _Tp, class _Up> struct __libcpp_is_member_function_pointer<_Tp _Up::*> : public is_function<_Tp> {}; |
| // |
| |
| template <class _MP, bool _IsMemberFunctionPtr, bool _IsMemberObjectPtr> |
| struct __member_pointer_traits_imp |
| { // forward declaration; specializations later |
| }; |
| |
| |
| template <class _Tp> struct __libcpp_is_member_function_pointer |
| : public false_type {}; |
| |
| template <class _Ret, class _Class> |
| struct __libcpp_is_member_function_pointer<_Ret _Class::*> |
| : public is_function<_Ret> {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer |
| : public __libcpp_is_member_function_pointer<typename remove_cv<_Tp>::type>::type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_function_pointer_v |
| = is_member_function_pointer<_Tp>::value; |
| #endif |
| |
| // is_member_pointer |
| |
| template <class _Tp> struct __libcpp_is_member_pointer : public false_type {}; |
| template <class _Tp, class _Up> struct __libcpp_is_member_pointer<_Tp _Up::*> : public true_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_pointer |
| : public __libcpp_is_member_pointer<typename remove_cv<_Tp>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_pointer_v |
| = is_member_pointer<_Tp>::value; |
| #endif |
| |
| // is_member_object_pointer |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_object_pointer |
| : public integral_constant<bool, is_member_pointer<_Tp>::value && |
| !is_member_function_pointer<_Tp>::value> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_object_pointer_v |
| = is_member_object_pointer<_Tp>::value; |
| #endif |
| |
| // is_enum |
| |
| #if __has_feature(is_enum) || defined(_LIBCPP_COMPILER_GCC) |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum |
| : public integral_constant<bool, __is_enum(_Tp)> {}; |
| |
| #else |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum |
| : public integral_constant<bool, !is_void<_Tp>::value && |
| !is_integral<_Tp>::value && |
| !is_floating_point<_Tp>::value && |
| !is_array<_Tp>::value && |
| !is_pointer<_Tp>::value && |
| !is_reference<_Tp>::value && |
| !is_member_pointer<_Tp>::value && |
| !is_union<_Tp>::value && |
| !is_class<_Tp>::value && |
| !is_function<_Tp>::value > {}; |
| |
| #endif |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_enum_v |
| = is_enum<_Tp>::value; |
| #endif |
| |
| // is_arithmetic |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_arithmetic |
| : public integral_constant<bool, is_integral<_Tp>::value || |
| is_floating_point<_Tp>::value> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_arithmetic_v |
| = is_arithmetic<_Tp>::value; |
| #endif |
| |
| // is_fundamental |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_fundamental |
| : public integral_constant<bool, is_void<_Tp>::value || |
| __is_nullptr_t<_Tp>::value || |
| is_arithmetic<_Tp>::value> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_fundamental_v |
| = is_fundamental<_Tp>::value; |
| #endif |
| |
| // is_scalar |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_scalar |
| : public integral_constant<bool, is_arithmetic<_Tp>::value || |
| is_member_pointer<_Tp>::value || |
| is_pointer<_Tp>::value || |
| __is_nullptr_t<_Tp>::value || |
| is_enum<_Tp>::value > {}; |
| |
| template <> struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_scalar_v |
| = is_scalar<_Tp>::value; |
| #endif |
| |
| // is_object |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_object |
| : public integral_constant<bool, is_scalar<_Tp>::value || |
| is_array<_Tp>::value || |
| is_union<_Tp>::value || |
| is_class<_Tp>::value > {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_object_v |
| = is_object<_Tp>::value; |
| #endif |
| |
| // is_compound |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_compound |
| : public integral_constant<bool, !is_fundamental<_Tp>::value> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_compound_v |
| = is_compound<_Tp>::value; |
| #endif |
| |
| |
| // __is_referenceable [defns.referenceable] |
| |
| struct __is_referenceable_impl { |
| template <class _Tp> static _Tp& __test(int); |
| template <class _Tp> static __two __test(...); |
| }; |
| |
| template <class _Tp> |
| struct __is_referenceable : integral_constant<bool, |
| !is_same<decltype(__is_referenceable_impl::__test<_Tp>(0)), __two>::value> {}; |
| |
| |
| // add_const |
| |
| template <class _Tp, bool = is_reference<_Tp>::value || |
| is_function<_Tp>::value || |
| is_const<_Tp>::value > |
| struct __add_const {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| |
| template <class _Tp> |
| struct __add_const<_Tp, false> {typedef _LIBCPP_NODEBUG_TYPE const _Tp type;}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_const |
| {typedef _LIBCPP_NODEBUG_TYPE typename __add_const<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_const_t = typename add_const<_Tp>::type; |
| #endif |
| |
| // add_volatile |
| |
| template <class _Tp, bool = is_reference<_Tp>::value || |
| is_function<_Tp>::value || |
| is_volatile<_Tp>::value > |
| struct __add_volatile {typedef _Tp type;}; |
| |
| template <class _Tp> |
| struct __add_volatile<_Tp, false> {typedef volatile _Tp type;}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_volatile |
| {typedef _LIBCPP_NODEBUG_TYPE typename __add_volatile<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_volatile_t = typename add_volatile<_Tp>::type; |
| #endif |
| |
| // add_cv |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_cv |
| {typedef _LIBCPP_NODEBUG_TYPE typename add_const<typename add_volatile<_Tp>::type>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_cv_t = typename add_cv<_Tp>::type; |
| #endif |
| |
| // remove_reference |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&&> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_reference_t = typename remove_reference<_Tp>::type; |
| #endif |
| |
| // add_lvalue_reference |
| |
| template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_lvalue_reference_impl { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; |
| template <class _Tp > struct __add_lvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG_TYPE _Tp& type; }; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_lvalue_reference |
| {typedef _LIBCPP_NODEBUG_TYPE typename __add_lvalue_reference_impl<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; |
| #endif |
| |
| template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_rvalue_reference_impl { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; |
| template <class _Tp > struct __add_rvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG_TYPE _Tp&& type; }; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_rvalue_reference |
| {typedef _LIBCPP_NODEBUG_TYPE typename __add_rvalue_reference_impl<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; |
| #endif |
| |
| template <class _Tp> _Tp&& __declval(int); |
| template <class _Tp> _Tp __declval(long); |
| |
| template <class _Tp> |
| decltype(_VSTD::__declval<_Tp>(0)) |
| declval() _NOEXCEPT; |
| |
| // __uncvref |
| |
| template <class _Tp> |
| struct __uncvref { |
| typedef _LIBCPP_NODEBUG_TYPE typename remove_cv<typename remove_reference<_Tp>::type>::type type; |
| }; |
| |
| template <class _Tp> |
| struct __unconstref { |
| typedef _LIBCPP_NODEBUG_TYPE typename remove_const<typename remove_reference<_Tp>::type>::type type; |
| }; |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| template <class _Tp> |
| using __uncvref_t _LIBCPP_NODEBUG_TYPE = typename __uncvref<_Tp>::type; |
| #endif |
| |
| // __is_same_uncvref |
| |
| template <class _Tp, class _Up> |
| struct __is_same_uncvref : is_same<typename __uncvref<_Tp>::type, |
| typename __uncvref<_Up>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 17 |
| // remove_cvref - same as __uncvref |
| template <class _Tp> |
| struct remove_cvref : public __uncvref<_Tp> {}; |
| |
| template <class _Tp> using remove_cvref_t = typename remove_cvref<_Tp>::type; |
| #endif |
| |
| |
| struct __any |
| { |
| __any(...); |
| }; |
| |
| // remove_pointer |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_pointer_t = typename remove_pointer<_Tp>::type; |
| #endif |
| |
| // add_pointer |
| |
| template <class _Tp, |
| bool = __is_referenceable<_Tp>::value || |
| is_same<typename remove_cv<_Tp>::type, void>::value> |
| struct __add_pointer_impl |
| {typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type* type;}; |
| template <class _Tp> struct __add_pointer_impl<_Tp, false> |
| {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_pointer |
| {typedef _LIBCPP_NODEBUG_TYPE typename __add_pointer_impl<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using add_pointer_t = typename add_pointer<_Tp>::type; |
| #endif |
| |
| // type_identity |
| #if _LIBCPP_STD_VER > 17 |
| template<class _Tp> struct type_identity { typedef _Tp type; }; |
| template<class _Tp> using type_identity_t = typename type_identity<_Tp>::type; |
| #endif |
| |
| // is_signed |
| |
| template <class _Tp, bool = is_integral<_Tp>::value> |
| struct __libcpp_is_signed_impl : public _LIBCPP_BOOL_CONSTANT(_Tp(-1) < _Tp(0)) {}; |
| |
| template <class _Tp> |
| struct __libcpp_is_signed_impl<_Tp, false> : public true_type {}; // floating point |
| |
| template <class _Tp, bool = is_arithmetic<_Tp>::value> |
| struct __libcpp_is_signed : public __libcpp_is_signed_impl<_Tp> {}; |
| |
| template <class _Tp> struct __libcpp_is_signed<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_signed : public __libcpp_is_signed<_Tp> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_signed_v |
| = is_signed<_Tp>::value; |
| #endif |
| |
| // is_unsigned |
| |
| template <class _Tp, bool = is_integral<_Tp>::value> |
| struct __libcpp_is_unsigned_impl : public _LIBCPP_BOOL_CONSTANT(_Tp(0) < _Tp(-1)) {}; |
| |
| template <class _Tp> |
| struct __libcpp_is_unsigned_impl<_Tp, false> : public false_type {}; // floating point |
| |
| template <class _Tp, bool = is_arithmetic<_Tp>::value> |
| struct __libcpp_is_unsigned : public __libcpp_is_unsigned_impl<_Tp> {}; |
| |
| template <class _Tp> struct __libcpp_is_unsigned<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unsigned : public __libcpp_is_unsigned<_Tp> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_unsigned_v |
| = is_unsigned<_Tp>::value; |
| #endif |
| |
| // rank |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank |
| : public integral_constant<size_t, 0> {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[]> |
| : public integral_constant<size_t, rank<_Tp>::value + 1> {}; |
| template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[_Np]> |
| : public integral_constant<size_t, rank<_Tp>::value + 1> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t rank_v |
| = rank<_Tp>::value; |
| #endif |
| |
| // extent |
| |
| template <class _Tp, unsigned _Ip = 0> struct _LIBCPP_TEMPLATE_VIS extent |
| : public integral_constant<size_t, 0> {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[], 0> |
| : public integral_constant<size_t, 0> {}; |
| template <class _Tp, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[], _Ip> |
| : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; |
| template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], 0> |
| : public integral_constant<size_t, _Np> {}; |
| template <class _Tp, size_t _Np, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], _Ip> |
| : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp, unsigned _Ip = 0> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t extent_v |
| = extent<_Tp, _Ip>::value; |
| #endif |
| |
| // remove_extent |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent |
| {typedef _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[]> |
| {typedef _Tp type;}; |
| template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[_Np]> |
| {typedef _Tp type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_extent_t = typename remove_extent<_Tp>::type; |
| #endif |
| |
| // remove_all_extents |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents |
| {typedef _Tp type;}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[]> |
| {typedef typename remove_all_extents<_Tp>::type type;}; |
| template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[_Np]> |
| {typedef typename remove_all_extents<_Tp>::type type;}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using remove_all_extents_t = typename remove_all_extents<_Tp>::type; |
| #endif |
| |
| #if _LIBCPP_STD_VER > 17 |
| // is_bounded_array |
| |
| template <class> struct _LIBCPP_TEMPLATE_VIS is_bounded_array : false_type {}; |
| template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_bounded_array<_Tp[_Np]> : true_type {}; |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR |
| bool is_bounded_array_v = is_bounded_array<_Tp>::value; |
| |
| // is_unbounded_array |
| |
| template <class> struct _LIBCPP_TEMPLATE_VIS is_unbounded_array : false_type {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unbounded_array<_Tp[]> : true_type {}; |
| |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR |
| bool is_unbounded_array_v = is_unbounded_array<_Tp>::value; |
| #endif |
| |
| // decay |
| |
| template <class _Up, bool> |
| struct __decay { |
| typedef _LIBCPP_NODEBUG_TYPE typename remove_cv<_Up>::type type; |
| }; |
| |
| template <class _Up> |
| struct __decay<_Up, true> { |
| public: |
| typedef _LIBCPP_NODEBUG_TYPE typename conditional |
| < |
| is_array<_Up>::value, |
| typename remove_extent<_Up>::type*, |
| typename conditional |
| < |
| is_function<_Up>::value, |
| typename add_pointer<_Up>::type, |
| typename remove_cv<_Up>::type |
| >::type |
| >::type type; |
| }; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS decay |
| { |
| private: |
| typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type _Up; |
| public: |
| typedef _LIBCPP_NODEBUG_TYPE typename __decay<_Up, __is_referenceable<_Up>::value>::type type; |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using decay_t = typename decay<_Tp>::type; |
| #endif |
| |
| // is_abstract |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_abstract |
| : public integral_constant<bool, __is_abstract(_Tp)> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_abstract_v |
| = is_abstract<_Tp>::value; |
| #endif |
| |
| // is_final |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS |
| __libcpp_is_final : public integral_constant<bool, __is_final(_Tp)> {}; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS |
| is_final : public integral_constant<bool, __is_final(_Tp)> {}; |
| #endif |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_final_v |
| = is_final<_Tp>::value; |
| #endif |
| |
| // is_aggregate |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_IS_AGGREGATE) |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS |
| is_aggregate : public integral_constant<bool, __is_aggregate(_Tp)> {}; |
| |
| #if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR constexpr bool is_aggregate_v |
| = is_aggregate<_Tp>::value; |
| #endif |
| |
| #endif // _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_IS_AGGREGATE) |
| |
| // is_base_of |
| |
| template <class _Bp, class _Dp> |
| struct _LIBCPP_TEMPLATE_VIS is_base_of |
| : public integral_constant<bool, __is_base_of(_Bp, _Dp)> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Bp, class _Dp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_base_of_v |
| = is_base_of<_Bp, _Dp>::value; |
| #endif |
| |
| // is_convertible |
| |
| #if __has_feature(is_convertible_to) && !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK) |
| |
| template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS is_convertible |
| : public integral_constant<bool, __is_convertible_to(_T1, _T2) && |
| !is_abstract<_T2>::value> {}; |
| |
| #else // __has_feature(is_convertible_to) |
| |
| namespace __is_convertible_imp |
| { |
| template <class _Tp> void __test_convert(_Tp); |
| |
| template <class _From, class _To, class = void> |
| struct __is_convertible_test : public false_type {}; |
| |
| template <class _From, class _To> |
| struct __is_convertible_test<_From, _To, |
| decltype(_VSTD::__is_convertible_imp::__test_convert<_To>(_VSTD::declval<_From>()))> : public true_type |
| {}; |
| |
| template <class _Tp, bool _IsArray = is_array<_Tp>::value, |
| bool _IsFunction = is_function<_Tp>::value, |
| bool _IsVoid = is_void<_Tp>::value> |
| struct __is_array_function_or_void {enum {value = 0};}; |
| template <class _Tp> struct __is_array_function_or_void<_Tp, true, false, false> {enum {value = 1};}; |
| template <class _Tp> struct __is_array_function_or_void<_Tp, false, true, false> {enum {value = 2};}; |
| template <class _Tp> struct __is_array_function_or_void<_Tp, false, false, true> {enum {value = 3};}; |
| } |
| |
| template <class _Tp, |
| unsigned = __is_convertible_imp::__is_array_function_or_void<typename remove_reference<_Tp>::type>::value> |
| struct __is_convertible_check |
| { |
| static const size_t __v = 0; |
| }; |
| |
| template <class _Tp> |
| struct __is_convertible_check<_Tp, 0> |
| { |
| static const size_t __v = sizeof(_Tp); |
| }; |
| |
| template <class _T1, class _T2, |
| unsigned _T1_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T1>::value, |
| unsigned _T2_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T2>::value> |
| struct __is_convertible |
| : public integral_constant<bool, |
| __is_convertible_imp::__is_convertible_test<_T1, _T2>::value |
| > |
| {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 1> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 1> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 1> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 1> : public false_type {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 2> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 2> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 2> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 2> : public false_type {}; |
| |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 3> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 3> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 3> : public false_type {}; |
| template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 3> : public true_type {}; |
| |
| template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS is_convertible |
| : public __is_convertible<_T1, _T2> |
| { |
| static const size_t __complete_check1 = __is_convertible_check<_T1>::__v; |
| static const size_t __complete_check2 = __is_convertible_check<_T2>::__v; |
| }; |
| |
| #endif // __has_feature(is_convertible_to) |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _From, class _To> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_convertible_v |
| = is_convertible<_From, _To>::value; |
| #endif |
| |
| // is_nothrow_convertible |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| template <typename _Tp> |
| static void __test_noexcept(_Tp) noexcept; |
| |
| template<typename _Fm, typename _To> |
| static bool_constant<noexcept(__test_noexcept<_To>(declval<_Fm>()))> |
| __is_nothrow_convertible_test(); |
| |
| template <typename _Fm, typename _To> |
| struct __is_nothrow_convertible_helper: decltype(__is_nothrow_convertible_test<_Fm, _To>()) |
| { }; |
| |
| template <typename _Fm, typename _To> |
| struct is_nothrow_convertible : __or_< |
| __and_<is_void<_To>, is_void<_Fm>>, |
| __and_<is_convertible<_Fm, _To>, __is_nothrow_convertible_helper<_Fm, _To>> |
| >::type { }; |
| |
| template <typename _Fm, typename _To> |
| inline constexpr bool is_nothrow_convertible_v = is_nothrow_convertible<_Fm, _To>::value; |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| // is_empty |
| |
| #if __has_feature(is_empty) || defined(_LIBCPP_COMPILER_GCC) |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_empty |
| : public integral_constant<bool, __is_empty(_Tp)> {}; |
| |
| #else // __has_feature(is_empty) |
| |
| template <class _Tp> |
| struct __is_empty1 |
| : public _Tp |
| { |
| double __lx; |
| }; |
| |
| struct __is_empty2 |
| { |
| double __lx; |
| }; |
| |
| template <class _Tp, bool = is_class<_Tp>::value> |
| struct __libcpp_empty : public integral_constant<bool, sizeof(__is_empty1<_Tp>) == sizeof(__is_empty2)> {}; |
| |
| template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {}; |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_empty : public __libcpp_empty<_Tp> {}; |
| |
| #endif // __has_feature(is_empty) |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_empty_v |
| = is_empty<_Tp>::value; |
| #endif |
| |
| // is_polymorphic |
| |
| #if __has_feature(is_polymorphic) || defined(_LIBCPP_COMPILER_MSVC) |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_polymorphic |
| : public integral_constant<bool, __is_polymorphic(_Tp)> {}; |
| |
| #else |
| |
| template<typename _Tp> char &__is_polymorphic_impl( |
| typename enable_if<sizeof((_Tp*)dynamic_cast<const volatile void*>(declval<_Tp*>())) != 0, |
| int>::type); |
| template<typename _Tp> __two &__is_polymorphic_impl(...); |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_polymorphic |
| : public integral_constant<bool, sizeof(__is_polymorphic_impl<_Tp>(0)) == 1> {}; |
| |
| #endif // __has_feature(is_polymorphic) |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_polymorphic_v |
| = is_polymorphic<_Tp>::value; |
| #endif |
| |
| // has_virtual_destructor |
| |
| #if __has_feature(has_virtual_destructor) || defined(_LIBCPP_COMPILER_GCC) |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor |
| : public integral_constant<bool, __has_virtual_destructor(_Tp)> {}; |
| |
| #else |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor |
| : public false_type {}; |
| |
| #endif |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool has_virtual_destructor_v |
| = has_virtual_destructor<_Tp>::value; |
| #endif |
| |
| // has_unique_object_representations |
| |
| #if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS) |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_unique_object_representations |
| : public integral_constant<bool, |
| __has_unique_object_representations(remove_cv_t<remove_all_extents_t<_Tp>>)> {}; |
| |
| #if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool has_unique_object_representations_v |
| = has_unique_object_representations<_Tp>::value; |
| #endif |
| |
| #endif |
| |
| // alignment_of |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS alignment_of |
| : public integral_constant<size_t, _LIBCPP_ALIGNOF(_Tp)> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t alignment_of_v |
| = alignment_of<_Tp>::value; |
| #endif |
| |
| // aligned_storage |
| |
| template <class _Hp, class _Tp> |
| struct __type_list |
| { |
| typedef _Hp _Head; |
| typedef _Tp _Tail; |
| }; |
| |
| struct __nat |
| { |
| #ifndef _LIBCPP_CXX03_LANG |
| __nat() = delete; |
| __nat(const __nat&) = delete; |
| __nat& operator=(const __nat&) = delete; |
| ~__nat() = delete; |
| #endif |
| }; |
| |
| template <class _Tp> |
| struct __align_type |
| { |
| static const size_t value = _LIBCPP_PREFERRED_ALIGNOF(_Tp); |
| typedef _Tp type; |
| }; |
| |
| struct __struct_double {long double __lx;}; |
| struct __struct_double4 {double __lx[4];}; |
| |
| typedef |
| __type_list<__align_type<unsigned char>, |
| __type_list<__align_type<unsigned short>, |
| __type_list<__align_type<unsigned int>, |
| __type_list<__align_type<unsigned long>, |
| __type_list<__align_type<unsigned long long>, |
| __type_list<__align_type<double>, |
| __type_list<__align_type<long double>, |
| __type_list<__align_type<__struct_double>, |
| __type_list<__align_type<__struct_double4>, |
| __type_list<__align_type<int*>, |
| __nat |
| > > > > > > > > > > __all_types; |
| |
| template <size_t _Align> |
| struct _ALIGNAS(_Align) __fallback_overaligned {}; |
| |
| template <class _TL, size_t _Align> struct __find_pod; |
| |
| template <class _Hp, size_t _Align> |
| struct __find_pod<__type_list<_Hp, __nat>, _Align> |
| { |
| typedef typename conditional< |
| _Align == _Hp::value, |
| typename _Hp::type, |
| __fallback_overaligned<_Align> |
| >::type type; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Align> |
| struct __find_pod<__type_list<_Hp, _Tp>, _Align> |
| { |
| typedef typename conditional< |
| _Align == _Hp::value, |
| typename _Hp::type, |
| typename __find_pod<_Tp, _Align>::type |
| >::type type; |
| }; |
| |
| template <class _TL, size_t _Len> struct __find_max_align; |
| |
| template <class _Hp, size_t _Len> |
| struct __find_max_align<__type_list<_Hp, __nat>, _Len> : public integral_constant<size_t, _Hp::value> {}; |
| |
| template <size_t _Len, size_t _A1, size_t _A2> |
| struct __select_align |
| { |
| private: |
| static const size_t __min = _A2 < _A1 ? _A2 : _A1; |
| static const size_t __max = _A1 < _A2 ? _A2 : _A1; |
| public: |
| static const size_t value = _Len < __max ? __min : __max; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Len> |
| struct __find_max_align<__type_list<_Hp, _Tp>, _Len> |
| : public integral_constant<size_t, __select_align<_Len, _Hp::value, __find_max_align<_Tp, _Len>::value>::value> {}; |
| |
| template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value> |
| struct _LIBCPP_TEMPLATE_VIS aligned_storage |
| { |
| typedef typename __find_pod<__all_types, _Align>::type _Aligner; |
| union type |
| { |
| _Aligner __align; |
| unsigned char __data[(_Len + _Align - 1)/_Align * _Align]; |
| }; |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value> |
| using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; |
| #endif |
| |
| #define _CREATE_ALIGNED_STORAGE_SPECIALIZATION(n) \ |
| template <size_t _Len>\ |
| struct _LIBCPP_TEMPLATE_VIS aligned_storage<_Len, n>\ |
| {\ |
| struct _ALIGNAS(n) type\ |
| {\ |
| unsigned char __lx[(_Len + n - 1)/n * n];\ |
| };\ |
| } |
| |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x8); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x10); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x20); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x40); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x80); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x100); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x200); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x400); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000); |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000); |
| // PE/COFF does not support alignment beyond 8192 (=0x2000) |
| #if !defined(_LIBCPP_OBJECT_FORMAT_COFF) |
| _CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000); |
| #endif // !defined(_LIBCPP_OBJECT_FORMAT_COFF) |
| |
| #undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION |
| |
| #ifndef _LIBCPP_HAS_NO_VARIADICS |
| |
| // aligned_union |
| |
| template <size_t _I0, size_t ..._In> |
| struct __static_max; |
| |
| template <size_t _I0> |
| struct __static_max<_I0> |
| { |
| static const size_t value = _I0; |
| }; |
| |
| template <size_t _I0, size_t _I1, size_t ..._In> |
| struct __static_max<_I0, _I1, _In...> |
| { |
| static const size_t value = _I0 >= _I1 ? __static_max<_I0, _In...>::value : |
| __static_max<_I1, _In...>::value; |
| }; |
| |
| template <size_t _Len, class _Type0, class ..._Types> |
| struct aligned_union |
| { |
| static const size_t alignment_value = __static_max<_LIBCPP_PREFERRED_ALIGNOF(_Type0), |
| _LIBCPP_PREFERRED_ALIGNOF(_Types)...>::value; |
| static const size_t __len = __static_max<_Len, sizeof(_Type0), |
| sizeof(_Types)...>::value; |
| typedef typename aligned_storage<__len, alignment_value>::type type; |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <size_t _Len, class ..._Types> using aligned_union_t = typename aligned_union<_Len, _Types...>::type; |
| #endif |
| |
| #endif // _LIBCPP_HAS_NO_VARIADICS |
| |
| template <class _Tp> |
| struct __numeric_type |
| { |
| static void __test(...); |
| static float __test(float); |
| static double __test(char); |
| static double __test(int); |
| static double __test(unsigned); |
| static double __test(long); |
| static double __test(unsigned long); |
| static double __test(long long); |
| static double __test(unsigned long long); |
| static double __test(double); |
| static long double __test(long double); |
| |
| typedef decltype(__test(declval<_Tp>())) type; |
| static const bool value = !is_same<type, void>::value; |
| }; |
| |
| template <> |
| struct __numeric_type<void> |
| { |
| static const bool value = true; |
| }; |
| |
| // __promote |
| |
| template <class _A1, class _A2 = void, class _A3 = void, |
| bool = __numeric_type<_A1>::value && |
| __numeric_type<_A2>::value && |
| __numeric_type<_A3>::value> |
| class __promote_imp |
| { |
| public: |
| static const bool value = false; |
| }; |
| |
| template <class _A1, class _A2, class _A3> |
| class __promote_imp<_A1, _A2, _A3, true> |
| { |
| private: |
| typedef typename __promote_imp<_A1>::type __type1; |
| typedef typename __promote_imp<_A2>::type __type2; |
| typedef typename __promote_imp<_A3>::type __type3; |
| public: |
| typedef decltype(__type1() + __type2() + __type3()) type; |
| static const bool value = true; |
| }; |
| |
| template <class _A1, class _A2> |
| class __promote_imp<_A1, _A2, void, true> |
| { |
| private: |
| typedef typename __promote_imp<_A1>::type __type1; |
| typedef typename __promote_imp<_A2>::type __type2; |
| public: |
| typedef decltype(__type1() + __type2()) type; |
| static const bool value = true; |
| }; |
| |
| template <class _A1> |
| class __promote_imp<_A1, void, void, true> |
| { |
| public: |
| typedef typename __numeric_type<_A1>::type type; |
| static const bool value = true; |
| }; |
| |
| template <class _A1, class _A2 = void, class _A3 = void> |
| class __promote : public __promote_imp<_A1, _A2, _A3> {}; |
| |
| // make_signed / make_unsigned |
| |
| typedef |
| __type_list<signed char, |
| __type_list<signed short, |
| __type_list<signed int, |
| __type_list<signed long, |
| __type_list<signed long long, |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| __type_list<__int128_t, |
| #endif |
| __nat |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| > |
| #endif |
| > > > > > __signed_types; |
| |
| typedef |
| __type_list<unsigned char, |
| __type_list<unsigned short, |
| __type_list<unsigned int, |
| __type_list<unsigned long, |
| __type_list<unsigned long long, |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| __type_list<__uint128_t, |
| #endif |
| __nat |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| > |
| #endif |
| > > > > > __unsigned_types; |
| |
| template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> struct __find_first; |
| |
| template <class _Hp, class _Tp, size_t _Size> |
| struct __find_first<__type_list<_Hp, _Tp>, _Size, true> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE _Hp type; |
| }; |
| |
| template <class _Hp, class _Tp, size_t _Size> |
| struct __find_first<__type_list<_Hp, _Tp>, _Size, false> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename __find_first<_Tp, _Size>::type type; |
| }; |
| |
| template <class _Tp, class _Up, bool = is_const<typename remove_reference<_Tp>::type>::value, |
| bool = is_volatile<typename remove_reference<_Tp>::type>::value> |
| struct __apply_cv |
| { |
| typedef _LIBCPP_NODEBUG_TYPE _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, true, false> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE const _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, false, true> |
| { |
| typedef volatile _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, true, true> |
| { |
| typedef const volatile _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, false, false> |
| { |
| typedef _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, true, false> |
| { |
| typedef const _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, false, true> |
| { |
| typedef volatile _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, true, true> |
| { |
| typedef const volatile _Up& type; |
| }; |
| |
| template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> |
| struct __make_signed {}; |
| |
| template <class _Tp> |
| struct __make_signed<_Tp, true> |
| { |
| typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; |
| }; |
| |
| template <> struct __make_signed<bool, true> {}; |
| template <> struct __make_signed< signed short, true> {typedef short type;}; |
| template <> struct __make_signed<unsigned short, true> {typedef short type;}; |
| template <> struct __make_signed< signed int, true> {typedef int type;}; |
| template <> struct __make_signed<unsigned int, true> {typedef int type;}; |
| template <> struct __make_signed< signed long, true> {typedef long type;}; |
| template <> struct __make_signed<unsigned long, true> {typedef long type;}; |
| template <> struct __make_signed< signed long long, true> {typedef long long type;}; |
| template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| template <> struct __make_signed<__int128_t, true> {typedef __int128_t type;}; |
| template <> struct __make_signed<__uint128_t, true> {typedef __int128_t type;}; |
| #endif |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS make_signed |
| { |
| typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using make_signed_t = typename make_signed<_Tp>::type; |
| #endif |
| |
| template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> |
| struct __make_unsigned {}; |
| |
| template <class _Tp> |
| struct __make_unsigned<_Tp, true> |
| { |
| typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type; |
| }; |
| |
| template <> struct __make_unsigned<bool, true> {}; |
| template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;}; |
| template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;}; |
| template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;}; |
| template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;}; |
| template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;}; |
| template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;}; |
| template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;}; |
| template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;}; |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| template <> struct __make_unsigned<__int128_t, true> {typedef __uint128_t type;}; |
| template <> struct __make_unsigned<__uint128_t, true> {typedef __uint128_t type;}; |
| #endif |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS make_unsigned |
| { |
| typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type; |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using make_unsigned_t = typename make_unsigned<_Tp>::type; |
| #endif |
| |
| template <class _Tp, class _Up, class = void> |
| struct __common_type2_imp {}; |
| |
| template <class _Tp, class _Up> |
| struct __common_type2_imp<_Tp, _Up, |
| typename __void_t<decltype( |
| true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() |
| )>::type> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename decay<decltype( |
| true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() |
| )>::type type; |
| }; |
| |
| template <class, class = void> |
| struct __common_type_impl {}; |
| |
| // Clang provides variadic templates in C++03 as an extension. |
| #if !defined(_LIBCPP_CXX03_LANG) || defined(__clang__) |
| # define _LIBCPP_OPTIONAL_PACK(...) , __VA_ARGS__ |
| template <class... Tp> |
| struct __common_types; |
| template <class... _Tp> |
| struct _LIBCPP_TEMPLATE_VIS common_type; |
| #else |
| # define _LIBCPP_OPTIONAL_PACK(...) |
| struct __no_arg; |
| template <class _Tp, class _Up, class = __no_arg> |
| struct __common_types; |
| template <class _Tp = __no_arg, class _Up = __no_arg, class _Vp = __no_arg, |
| class _Unused = __no_arg> |
| struct common_type { |
| static_assert(sizeof(_Unused) == 0, |
| "common_type accepts at most 3 arguments in C++03"); |
| }; |
| #endif // _LIBCPP_CXX03_LANG |
| |
| template <class _Tp, class _Up> |
| struct __common_type_impl< |
| __common_types<_Tp, _Up>, |
| typename __void_t<typename common_type<_Tp, _Up>::type>::type> |
| { |
| typedef typename common_type<_Tp, _Up>::type type; |
| }; |
| |
| template <class _Tp, class _Up, class _Vp _LIBCPP_OPTIONAL_PACK(class... _Rest)> |
| struct __common_type_impl< |
| __common_types<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)>, |
| typename __void_t<typename common_type<_Tp, _Up>::type>::type> |
| : __common_type_impl<__common_types<typename common_type<_Tp, _Up>::type, |
| _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> > { |
| }; |
| |
| // bullet 1 - sizeof...(Tp) == 0 |
| |
| template <> |
| struct _LIBCPP_TEMPLATE_VIS common_type<> {}; |
| |
| // bullet 2 - sizeof...(Tp) == 1 |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS common_type<_Tp> |
| : public common_type<_Tp, _Tp> {}; |
| |
| // bullet 3 - sizeof...(Tp) == 2 |
| |
| template <class _Tp, class _Up> |
| struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, _Up> |
| : conditional< |
| is_same<_Tp, typename decay<_Tp>::type>::value && is_same<_Up, typename decay<_Up>::type>::value, |
| __common_type2_imp<_Tp, _Up>, |
| common_type<typename decay<_Tp>::type, typename decay<_Up>::type> |
| >::type |
| {}; |
| |
| // bullet 4 - sizeof...(Tp) > 2 |
| |
| template <class _Tp, class _Up, class _Vp _LIBCPP_OPTIONAL_PACK(class... _Rest)> |
| struct _LIBCPP_TEMPLATE_VIS |
| common_type<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> |
| : __common_type_impl< |
| __common_types<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> > {}; |
| |
| #undef _LIBCPP_OPTIONAL_PACK |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class ..._Tp> using common_type_t = typename common_type<_Tp...>::type; |
| #endif |
| |
| // is_assignable |
| |
| template<typename, typename _Tp> struct __select_2nd { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; |
| |
| template <class _Tp, class _Arg> |
| typename __select_2nd<decltype((_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>())), true_type>::type |
| __is_assignable_test(int); |
| |
| template <class, class> |
| false_type __is_assignable_test(...); |
| |
| |
| template <class _Tp, class _Arg, bool = is_void<_Tp>::value || is_void<_Arg>::value> |
| struct __is_assignable_imp |
| : public decltype((_VSTD::__is_assignable_test<_Tp, _Arg>(0))) {}; |
| |
| template <class _Tp, class _Arg> |
| struct __is_assignable_imp<_Tp, _Arg, true> |
| : public false_type |
| { |
| }; |
| |
| template <class _Tp, class _Arg> |
| struct is_assignable |
| : public __is_assignable_imp<_Tp, _Arg> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp, class _Arg> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_assignable_v |
| = is_assignable<_Tp, _Arg>::value; |
| #endif |
| |
| // is_copy_assignable |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_copy_assignable |
| : public is_assignable<typename add_lvalue_reference<_Tp>::type, |
| typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_assignable_v |
| = is_copy_assignable<_Tp>::value; |
| #endif |
| |
| // is_move_assignable |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_move_assignable |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| : public is_assignable<typename add_lvalue_reference<_Tp>::type, |
| typename add_rvalue_reference<_Tp>::type> {}; |
| #else |
| : public is_copy_assignable<_Tp> {}; |
| #endif |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_assignable_v |
| = is_move_assignable<_Tp>::value; |
| #endif |
| |
| // is_destructible |
| |
| // if it's a reference, return true |
| // if it's a function, return false |
| // if it's void, return false |
| // if it's an array of unknown bound, return false |
| // Otherwise, return "std::declval<_Up&>().~_Up()" is well-formed |
| // where _Up is remove_all_extents<_Tp>::type |
| |
| template <class> |
| struct __is_destructible_apply { typedef int type; }; |
| |
| template <typename _Tp> |
| struct __is_destructor_wellformed { |
| template <typename _Tp1> |
| static char __test ( |
| typename __is_destructible_apply<decltype(_VSTD::declval<_Tp1&>().~_Tp1())>::type |
| ); |
| |
| template <typename _Tp1> |
| static __two __test (...); |
| |
| static const bool value = sizeof(__test<_Tp>(12)) == sizeof(char); |
| }; |
| |
| template <class _Tp, bool> |
| struct __destructible_imp; |
| |
| template <class _Tp> |
| struct __destructible_imp<_Tp, false> |
| : public _VSTD::integral_constant<bool, |
| __is_destructor_wellformed<typename _VSTD::remove_all_extents<_Tp>::type>::value> {}; |
| |
| template <class _Tp> |
| struct __destructible_imp<_Tp, true> |
| : public _VSTD::true_type {}; |
| |
| template <class _Tp, bool> |
| struct __destructible_false; |
| |
| template <class _Tp> |
| struct __destructible_false<_Tp, false> : public __destructible_imp<_Tp, _VSTD::is_reference<_Tp>::value> {}; |
| |
| template <class _Tp> |
| struct __destructible_false<_Tp, true> : public _VSTD::false_type {}; |
| |
| template <class _Tp> |
| struct is_destructible |
| : public __destructible_false<_Tp, _VSTD::is_function<_Tp>::value> {}; |
| |
| template <class _Tp> |
| struct is_destructible<_Tp[]> |
| : public _VSTD::false_type {}; |
| |
| template <> |
| struct is_destructible<void> |
| : public _VSTD::false_type {}; |
| |
| #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) |
| template <class _Tp> |
| _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_destructible_v |
| = is_destructible<_Tp>::value; |
| #endif |
| |
| // move |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| typename remove_reference<_Tp>::type&& |
| move(_Tp&& __t) _NOEXCEPT |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type _Up; |
| return static_cast<_Up&&>(__t); |
| } |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| _Tp&& |
| forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT |
| { |
| return static_cast<_Tp&&>(__t); |
| } |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| _Tp&& |
| forward(typename remove_reference<_Tp>::type&& __t) _NOEXCEPT |
| { |
| static_assert(!is_lvalue_reference<_Tp>::value, |
| "can not forward an rvalue as an lvalue"); |
| return static_cast<_Tp&&>(__t); |
| } |
| |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _Tp& |
| move(_Tp& __t) |
| { |
| return __t; |
| } |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| const _Tp& |
| move(const _Tp& __t) |
| { |
| return __t; |
| } |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _Tp& |
| forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT |
| { |
| return __t; |
| } |
| |
| |
| template <class _Tp> |
| class __rv |
| { |
| typedef typename remove_reference<_Tp>::type _Trr; |
| _Trr& t_; |
| public: |
| _LIBCPP_INLINE_VISIBILITY |
| _Trr* operator->() {return &t_;} |
| _LIBCPP_INLINE_VISIBILITY |
| explicit __rv(_Trr& __t) : t_(__t) {} |
| }; |
| |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| typename decay<_Tp>::type |
| __decay_copy(_Tp&& __t) |
| { |
| return _VSTD::forward<_Tp>(__t); |
| } |
| |
| #else |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| typename decay<_Tp>::type |
| __decay_copy(const _Tp& __t) |
| { |
| return _VSTD::forward<_Tp>(__t); |
| } |
| |
| #endif |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...), true, false> |
| { |
| typedef _Class _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...), true, false> |
| { |
| typedef _Class _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const, true, false> |
| { |
| typedef _Class const _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const, true, false> |
| { |
| typedef _Class const _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile, true, false> |
| { |
| typedef _Class volatile _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile, true, false> |
| { |
| typedef _Class volatile _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile, true, false> |
| { |
| typedef _Class const volatile _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile, true, false> |
| { |
| typedef _Class const volatile _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| #if __has_feature(cxx_reference_qualified_functions) || defined(_LIBCPP_COMPILER_GCC) |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &, true, false> |
| { |
| typedef _Class& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &, true, false> |
| { |
| typedef _Class& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&, true, false> |
| { |
| typedef _Class const& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&, true, false> |
| { |
| typedef _Class const& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&, true, false> |
| { |
| typedef _Class volatile& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&, true, false> |
| { |
| typedef _Class volatile& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&, true, false> |
| { |
| typedef _Class const volatile& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&, true, false> |
| { |
| typedef _Class const volatile& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &&, true, false> |
| { |
| typedef _Class&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &&, true, false> |
| { |
| typedef _Class&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&&, true, false> |
| { |
| typedef _Class const&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&&, true, false> |
| { |
| typedef _Class const&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&&, true, false> |
| { |
| typedef _Class volatile&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&&, true, false> |
| { |
| typedef _Class volatile&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&&, true, false> |
| { |
| typedef _Class const volatile&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param...); |
| }; |
| |
| template <class _Rp, class _Class, class ..._Param> |
| struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&&, true, false> |
| { |
| typedef _Class const volatile&& _ClassType; |
| typedef _Rp _ReturnType; |
| typedef _Rp (_FnType) (_Param..., ...); |
| }; |
| |
| #endif // __has_feature(cxx_reference_qualified_functions) || defined(_LIBCPP_COMPILER_GCC) |
| |
| |
| template <class _Rp, class _Class> |
| struct __member_pointer_traits_imp<_Rp _Class::*, false, true> |
| { |
| typedef _Class _ClassType; |
| typedef _Rp _ReturnType; |
| }; |
| |
| template <class _MP> |
| struct __member_pointer_traits |
| : public __member_pointer_traits_imp<typename remove_cv<_MP>::type, |
| is_member_function_pointer<_MP>::value, |
| is_member_object_pointer<_MP>::value> |
| { |
| // typedef ... _ClassType; |
| // typedef ... _ReturnType; |
| // typedef ... _FnType; |
| }; |
| |
| |
| template <class _DecayedFp> |
| struct __member_pointer_class_type {}; |
| |
| template <class _Ret, class _ClassType> |
| struct __member_pointer_class_type<_Ret _ClassType::*> { |
| typedef _ClassType type; |
| }; |
| |
| // result_of |
| |
| template <class _Callable> class result_of; |
| |
| #ifdef _LIBCPP_HAS_NO_VARIADICS |
| |
| template <class _Fn, bool, bool> |
| class __result_of |
| { |
| }; |
| |
| template <class _Fn> |
| class __result_of<_Fn(), true, false> |
| { |
| public: |
| typedef decltype(declval<_Fn>()()) type; |
| }; |
| |
| template <class _Fn, class _A0> |
| class __result_of<_Fn(_A0), true, false> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_A0>())) type; |
| }; |
| |
| template <class _Fn, class _A0, class _A1> |
| class __result_of<_Fn(_A0, _A1), true, false> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>())) type; |
| }; |
| |
| template <class _Fn, class _A0, class _A1, class _A2> |
| class __result_of<_Fn(_A0, _A1, _A2), true, false> |
| { |
| public: |
| typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>(), declval<_A2>())) type; |
| }; |
| |
| template <class _MP, class _Tp, bool _IsMemberFunctionPtr> |
| struct __result_of_mp; |
| |
| // member function pointer |
| |
| template <class _MP, class _Tp> |
| struct __result_of_mp<_MP, _Tp, true> |
| : public __identity<typename __member_pointer_traits<_MP>::_ReturnType> |
| { |
| }; |
| |
| // member data pointer |
| |
| template <class _MP, class _Tp, bool> |
| struct __result_of_mdp; |
| |
| template <class _Rp, class _Class, class _Tp> |
| struct __result_of_mdp<_Rp _Class::*, _Tp, false> |
| { |
| typedef typename __apply_cv<decltype(*_VSTD::declval<_Tp>()), _Rp>::type& type; |
| }; |
| |
| template <class _Rp, class _Class, class _Tp> |
| struct __result_of_mdp<_Rp _Class::*, _Tp, true> |
| { |
| typedef typename __apply_cv<_Tp, _Rp>::type& type; |
| }; |
| |
| template <class _Rp, class _Class, class _Tp> |
| struct __result_of_mp<_Rp _Class::*, _Tp, false> |
| : public __result_of_mdp<_Rp _Class::*, _Tp, |
| is_base_of<_Class, typename remove_reference<_Tp>::type>::value> |
| { |
| }; |
| |
| |
| |
| template <class _Fn, class _Tp> |
| class __result_of<_Fn(_Tp), false, true> // _Fn must be member pointer |
| : public __result_of_mp<typename remove_reference<_Fn>::type, |
| _Tp, |
| is_member_function_pointer<typename remove_reference<_Fn>::type>::value> |
| { |
| }; |
| |
| template <class _Fn, class _Tp, class _A0> |
| class __result_of<_Fn(_Tp, _A0), false, true> // _Fn must be member pointer |
| : public __result_of_mp<typename remove_reference<_Fn>::type, |
| _Tp, |
| is_member_function_pointer<typename remove_reference<_Fn>::type>::value> |
| { |
| }; |
| |
| template <class _Fn, class _Tp, class _A0, class _A1> |
| class __result_of<_Fn(_Tp, _A0, _A1), false, true> // _Fn must be member pointer |
| : public __result_of_mp<typename remove_reference<_Fn>::type, |
| _Tp, |
| is_member_function_pointer<typename remove_reference<_Fn>::type>::value> |
| { |
| }; |
| |
| template <class _Fn, class _Tp, class _A0, class _A1, class _A2> |
| class __result_of<_Fn(_Tp, _A0, _A1, _A2), false, true> // _Fn must be member pointer |
| : public __result_of_mp<typename remove_reference<_Fn>::type, |
| _Tp, |
| is_member_function_pointer<typename remove_reference<_Fn>::type>::value> |
| { |
| }; |
| |
| // result_of |
| |
| template <class _Fn> |
| class _LIBCPP_TEMPLATE_VIS result_of<_Fn()> |
| : public __result_of<_Fn(), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, |
| is_member_pointer<typename remove_reference<_Fn>::type>::value |
| > |
| { |
| }; |
| |
| template <class _Fn, class _A0> |
| class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0)> |
| : public __result_of<_Fn(_A0), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, |
| is_member_pointer<typename remove_reference<_Fn>::type>::value |
| > |
| { |
| }; |
| |
| template <class _Fn, class _A0, class _A1> |
| class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0, _A1)> |
| : public __result_of<_Fn(_A0, _A1), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, |
| is_member_pointer<typename remove_reference<_Fn>::type>::value |
| > |
| { |
| }; |
| |
| template <class _Fn, class _A0, class _A1, class _A2> |
| class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0, _A1, _A2)> |
| : public __result_of<_Fn(_A0, _A1, _A2), |
| is_class<typename remove_reference<_Fn>::type>::value || |
| is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, |
| is_member_pointer<typename remove_reference<_Fn>::type>::value |
| > |
| { |
| }; |
| |
| #endif // _LIBCPP_HAS_NO_VARIADICS |
| |
| // template <class T, class... Args> struct is_constructible; |
| |
| namespace __is_construct |
| { |
| struct __nat {}; |
| } |
| |
| #if !defined(_LIBCPP_CXX03_LANG) && (!__has_feature(is_constructible) || \ |
| defined(_LIBCPP_TESTING_FALLBACK_IS_CONSTRUCTIBLE)) |
| |
| template <class _Tp, class... _Args> |
| struct __libcpp_is_constructible; |
| |
| template <class _To, class _From> |
| struct __is_invalid_base_to_derived_cast { |
| static_assert(is_reference<_To>::value, "Wrong specialization"); |
| using _RawFrom = __uncvref_t<_From>; |
| using _RawTo = __uncvref_t<_To>; |
| static const bool value = __lazy_and< |
| __lazy_not<is_same<_RawFrom, _RawTo>>, |
| is_base_of<_RawFrom, _RawTo>, |
| __lazy_not<__libcpp_is_constructible<_RawTo, _From>> |
| >::value; |
| }; |
| |
| template <class _To, class _From> |
| struct __is_invalid_lvalue_to_rvalue_cast : false_type { |
| static_assert(is_reference<_To>::value, "Wrong specialization"); |
| }; |
| |
| template <class _ToRef, class _FromRef> |
| struct __is_invalid_lvalue_to_rvalue_cast<_ToRef&&, _FromRef&> { |
| using _RawFrom = __uncvref_t<_FromRef>; |
| using _RawTo = __uncvref_t<_ToRef>; |
| static const bool value = __lazy_and< |
| __lazy_not<is_function<_RawTo>>, |
| __lazy_or< |
| is_same<_RawFrom, _RawTo>, |
| is_base_of<_RawTo, _RawFrom>> |
| >::value; |
| }; |
| |
| struct __is_constructible_helper |
| { |
| template <class _To> |
| static void __eat(_To); |
| |
| // This overload is needed to work around a Clang bug that disallows |
| // static_cast<T&&>(e) for non-reference-compatible types. |
| // Example: static_cast<int&&>(declval<double>()); |
| // NOTE: The static_cast implementation below is required to support |
| // classes with explicit conversion operators. |
| template <class _To, class _From, |
| class = decltype(__eat<_To>(_VSTD::declval<_From>()))> |
| static true_type __test_cast(int); |
| |
| template <class _To, class _From, |
| class = decltype(static_cast<_To>(_VSTD::declval<_From>()))> |
| static integral_constant<bool, |
| !__is_invalid_base_to_derived_cast<_To, _From>::value && |
| !__is_invalid_lvalue_to_rvalue_cast<_To, _From>::value |
| > __test_cast(long); |
| |
| template <class, class> |
| static false_type __test_cast(...); |
| |
| template <class _Tp, class ..._Args, |
| class = decltype(_Tp(_VSTD::declval<_Args>()...))> |
| static true_type __test_nary(int); |
| template <class _Tp, class...> |
| static false_type __test_nary(...); |
| |
| template <class _Tp, class _A0, class = decltype(::new _Tp(_VSTD::declval<_A0>()))> |
| static is_destructible<_Tp> __test_unary(int); |
| template <class, class> |
| static false_type __test_unary(...); |
| }; |
| |
| template <class _Tp, bool = is_void<_Tp>::value> |
| struct __is_default_constructible |
| : decltype(__is_constructible_helper::__test_nary<_Tp>(0)) |
| {}; |
| |
| template <class _Tp> |
| struct __is_default_constructible<_Tp, true> : false_type {}; |
| |
| template <class _Tp> |
| struct __is_default_constructible<_Tp[], false> : false_type {}; |
| |
| template <class _Tp, size_t _Nx> |
| struct __is_default_constructible<_Tp[_Nx], false> |
| : __is_default_constructible<typename remove_all_extents<_Tp>::type> {}; |
| |
| template <class _Tp, class... _Args> |
| struct __libcpp_is_constructible |
| { |
| static_assert(sizeof...(_Args) > 1, "Wrong specialization"); |
| typedef decltype(__is_constructible_helper::__test_nary<_Tp, _Args...>(0)) |
| type; |
| }; |
| |
| template <class _Tp> |
| struct __libcpp_is_constructible<_Tp> : __is_default_constructible<_Tp> {}; |
| |
| template <class _Tp, class _A0> |
| struct __libcpp_is_constructible<_Tp, _A0> |
| : public decltype(__is_constructible_helper::__test_unary<_Tp, _A0>(0)) |
| {}; |
| |
| template <class _Tp, class _A0> |
| struct __libcpp_is_constructible<_Tp&, _A0 |