| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // 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_scoped_enum; // C++2b |
| 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; // Deprecated in C++17; removed in C++20 |
| 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; deprecated in C++17; removed in C++20 |
| template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; // deprecated in C++17; removed in C++20 |
| 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, size_t Align=default-alignment> |
| using aligned_storage_t = typename aligned_storage<Len,Align>::type; // C++14 |
| template <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; deprecated in C++17; removed in C++20 |
| 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 |
| template <class T> inline constexpr bool is_scoped_enum_v |
| = is_scoped_enum<T>::value; // C++2b |
| |
| // 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; deprecated in C++17; removed in C++20 |
| 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 <__assert> // all public C++ headers provide the assertion handler |
| #include <__config> |
| #include <__functional/invoke.h> |
| #include <__type_traits/add_const.h> |
| #include <__type_traits/add_cv.h> |
| #include <__type_traits/add_lvalue_reference.h> |
| #include <__type_traits/add_pointer.h> |
| #include <__type_traits/add_rvalue_reference.h> |
| #include <__type_traits/add_volatile.h> |
| #include <__type_traits/aligned_storage.h> |
| #include <__type_traits/aligned_union.h> |
| #include <__type_traits/alignment_of.h> |
| #include <__type_traits/apply_cv.h> |
| #include <__type_traits/common_reference.h> |
| #include <__type_traits/common_type.h> |
| #include <__type_traits/conditional.h> |
| #include <__type_traits/conjunction.h> |
| #include <__type_traits/decay.h> |
| #include <__type_traits/disjunction.h> |
| #include <__type_traits/enable_if.h> |
| #include <__type_traits/extent.h> |
| #include <__type_traits/has_unique_object_representation.h> |
| #include <__type_traits/has_virtual_destructor.h> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/is_abstract.h> |
| #include <__type_traits/is_aggregate.h> |
| #include <__type_traits/is_arithmetic.h> |
| #include <__type_traits/is_array.h> |
| #include <__type_traits/is_assignable.h> |
| #include <__type_traits/is_base_of.h> |
| #include <__type_traits/is_bounded_array.h> |
| #include <__type_traits/is_callable.h> |
| #include <__type_traits/is_class.h> |
| #include <__type_traits/is_compound.h> |
| #include <__type_traits/is_const.h> |
| #include <__type_traits/is_constant_evaluated.h> |
| #include <__type_traits/is_constructible.h> |
| #include <__type_traits/is_convertible.h> |
| #include <__type_traits/is_copy_assignable.h> |
| #include <__type_traits/is_copy_constructible.h> |
| #include <__type_traits/is_default_constructible.h> |
| #include <__type_traits/is_destructible.h> |
| #include <__type_traits/is_empty.h> |
| #include <__type_traits/is_enum.h> |
| #include <__type_traits/is_final.h> |
| #include <__type_traits/is_floating_point.h> |
| #include <__type_traits/is_function.h> |
| #include <__type_traits/is_fundamental.h> |
| #include <__type_traits/is_integral.h> |
| #include <__type_traits/is_literal_type.h> |
| #include <__type_traits/is_member_function_pointer.h> |
| #include <__type_traits/is_member_object_pointer.h> |
| #include <__type_traits/is_member_pointer.h> |
| #include <__type_traits/is_move_assignable.h> |
| #include <__type_traits/is_move_constructible.h> |
| #include <__type_traits/is_nothrow_assignable.h> |
| #include <__type_traits/is_nothrow_constructible.h> |
| #include <__type_traits/is_nothrow_convertible.h> |
| #include <__type_traits/is_nothrow_copy_assignable.h> |
| #include <__type_traits/is_nothrow_copy_constructible.h> |
| #include <__type_traits/is_nothrow_default_constructible.h> |
| #include <__type_traits/is_nothrow_destructible.h> |
| #include <__type_traits/is_nothrow_move_assignable.h> |
| #include <__type_traits/is_nothrow_move_constructible.h> |
| #include <__type_traits/is_null_pointer.h> |
| #include <__type_traits/is_object.h> |
| #include <__type_traits/is_pod.h> |
| #include <__type_traits/is_pointer.h> |
| #include <__type_traits/is_polymorphic.h> |
| #include <__type_traits/is_reference.h> |
| #include <__type_traits/is_reference_wrapper.h> |
| #include <__type_traits/is_referenceable.h> |
| #include <__type_traits/is_same.h> |
| #include <__type_traits/is_scalar.h> |
| #include <__type_traits/is_scoped_enum.h> |
| #include <__type_traits/is_signed.h> |
| #include <__type_traits/is_standard_layout.h> |
| #include <__type_traits/is_trivial.h> |
| #include <__type_traits/is_trivially_assignable.h> |
| #include <__type_traits/is_trivially_constructible.h> |
| #include <__type_traits/is_trivially_copy_assignable.h> |
| #include <__type_traits/is_trivially_copy_constructible.h> |
| #include <__type_traits/is_trivially_copyable.h> |
| #include <__type_traits/is_trivially_default_constructible.h> |
| #include <__type_traits/is_trivially_destructible.h> |
| #include <__type_traits/is_trivially_move_assignable.h> |
| #include <__type_traits/is_trivially_move_constructible.h> |
| #include <__type_traits/is_unbounded_array.h> |
| #include <__type_traits/is_union.h> |
| #include <__type_traits/is_unsigned.h> |
| #include <__type_traits/is_void.h> |
| #include <__type_traits/is_volatile.h> |
| #include <__type_traits/make_signed.h> |
| #include <__type_traits/make_unsigned.h> |
| #include <__type_traits/negation.h> |
| #include <__type_traits/rank.h> |
| #include <__type_traits/remove_all_extents.h> |
| #include <__type_traits/remove_const.h> |
| #include <__type_traits/remove_cv.h> |
| #include <__type_traits/remove_extent.h> |
| #include <__type_traits/remove_pointer.h> |
| #include <__type_traits/remove_reference.h> |
| #include <__type_traits/remove_volatile.h> |
| #include <__type_traits/type_identity.h> |
| #include <__type_traits/underlying_type.h> |
| #include <__type_traits/void_t.h> |
| #include <__utility/declval.h> |
| #include <cstddef> |
| #include <cstdint> |
| #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> struct _LIBCPP_TEMPLATE_VIS hash; |
| |
| // Member detector base |
| |
| template <class _Tp, bool> |
| struct _LIBCPP_TEMPLATE_VIS __dependent_type : public _Tp {}; |
| |
| // is_integral |
| |
| template <class _Tp> |
| struct __unconstref { |
| typedef _LIBCPP_NODEBUG typename remove_const<typename remove_reference<_Tp>::type>::type type; |
| }; |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| // First of all, we can't implement this check in C++03 mode because the {} |
| // default initialization syntax isn't valid. |
| // Second, we implement the trait in a funny manner with two defaulted template |
| // arguments to workaround Clang's PR43454. |
| template <class _Tp> |
| void __test_implicit_default_constructible(_Tp); |
| |
| template <class _Tp, class = void, class = typename is_default_constructible<_Tp>::type> |
| struct __is_implicitly_default_constructible |
| : false_type |
| { }; |
| |
| template <class _Tp> |
| struct __is_implicitly_default_constructible<_Tp, decltype(__test_implicit_default_constructible<_Tp const&>({})), true_type> |
| : true_type |
| { }; |
| |
| template <class _Tp> |
| struct __is_implicitly_default_constructible<_Tp, decltype(__test_implicit_default_constructible<_Tp const&>({})), false_type> |
| : false_type |
| { }; |
| #endif // !C++03 |
| |
| // result_of |
| |
| #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS) |
| template <class _Callable> class _LIBCPP_DEPRECATED_IN_CXX17 result_of; |
| |
| template <class _Fp, class ..._Args> |
| class _LIBCPP_TEMPLATE_VIS result_of<_Fp(_Args...)> |
| : public __invoke_of<_Fp, _Args...> |
| { |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <class _Tp> using result_of_t _LIBCPP_DEPRECATED_IN_CXX17 = typename result_of<_Tp>::type; |
| #endif // _LIBCPP_STD_VER > 11 |
| #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS) |
| |
| // __swappable |
| |
| template <class _Tp> struct __is_swappable; |
| template <class _Tp> struct __is_nothrow_swappable; |
| |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| template <class _Tp> |
| using __swap_result_t = typename enable_if<is_move_constructible<_Tp>::value && is_move_assignable<_Tp>::value>::type; |
| #else |
| template <class> |
| using __swap_result_t = void; |
| #endif |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _LIBCPP_CONSTEXPR_AFTER_CXX17 __swap_result_t<_Tp> |
| swap(_Tp& __x, _Tp& __y) _NOEXCEPT_(is_nothrow_move_constructible<_Tp>::value && |
| is_nothrow_move_assignable<_Tp>::value); |
| |
| template<class _Tp, size_t _Np> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| typename enable_if< |
| __is_swappable<_Tp>::value |
| >::type |
| swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np]) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value); |
| |
| namespace __detail |
| { |
| // ALL generic swap overloads MUST already have a declaration available at this point. |
| |
| template <class _Tp, class _Up = _Tp, |
| bool _NotVoid = !is_void<_Tp>::value && !is_void<_Up>::value> |
| struct __swappable_with |
| { |
| template <class _LHS, class _RHS> |
| static decltype(swap(declval<_LHS>(), declval<_RHS>())) |
| __test_swap(int); |
| template <class, class> |
| static __nat __test_swap(long); |
| |
| // Extra parens are needed for the C++03 definition of decltype. |
| typedef decltype((__test_swap<_Tp, _Up>(0))) __swap1; |
| typedef decltype((__test_swap<_Up, _Tp>(0))) __swap2; |
| |
| static const bool value = _IsNotSame<__swap1, __nat>::value |
| && _IsNotSame<__swap2, __nat>::value; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __swappable_with<_Tp, _Up, false> : false_type {}; |
| |
| template <class _Tp, class _Up = _Tp, bool _Swappable = __swappable_with<_Tp, _Up>::value> |
| struct __nothrow_swappable_with { |
| static const bool value = |
| #ifndef _LIBCPP_HAS_NO_NOEXCEPT |
| noexcept(swap(declval<_Tp>(), declval<_Up>())) |
| && noexcept(swap(declval<_Up>(), declval<_Tp>())); |
| #else |
| false; |
| #endif |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __nothrow_swappable_with<_Tp, _Up, false> : false_type {}; |
| |
| } // namespace __detail |
| |
| template <class _Tp> |
| struct __is_swappable |
| : public integral_constant<bool, __detail::__swappable_with<_Tp&>::value> |
| { |
| }; |
| |
| template <class _Tp> |
| struct __is_nothrow_swappable |
| : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp&>::value> |
| { |
| }; |
| |
| #if _LIBCPP_STD_VER > 14 |
| |
| template <class _Tp, class _Up> |
| struct _LIBCPP_TEMPLATE_VIS is_swappable_with |
| : public integral_constant<bool, __detail::__swappable_with<_Tp, _Up>::value> |
| { |
| }; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_swappable |
| : public conditional< |
| __is_referenceable<_Tp>::value, |
| is_swappable_with< |
| typename add_lvalue_reference<_Tp>::type, |
| typename add_lvalue_reference<_Tp>::type>, |
| false_type |
| >::type |
| { |
| }; |
| |
| template <class _Tp, class _Up> |
| struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable_with |
| : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp, _Up>::value> |
| { |
| }; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable |
| : public conditional< |
| __is_referenceable<_Tp>::value, |
| is_nothrow_swappable_with< |
| typename add_lvalue_reference<_Tp>::type, |
| typename add_lvalue_reference<_Tp>::type>, |
| false_type |
| >::type |
| { |
| }; |
| |
| template <class _Tp, class _Up> |
| inline constexpr bool is_swappable_with_v = is_swappable_with<_Tp, _Up>::value; |
| |
| template <class _Tp> |
| inline constexpr bool is_swappable_v = is_swappable<_Tp>::value; |
| |
| template <class _Tp, class _Up> |
| inline constexpr bool is_nothrow_swappable_with_v = is_nothrow_swappable_with<_Tp, _Up>::value; |
| |
| template <class _Tp> |
| inline constexpr bool is_nothrow_swappable_v = is_nothrow_swappable<_Tp>::value; |
| |
| #endif // _LIBCPP_STD_VER > 14 |
| |
| template <class _Tp, bool = is_enum<_Tp>::value> |
| struct __sfinae_underlying_type |
| { |
| typedef typename underlying_type<_Tp>::type type; |
| typedef decltype(((type)1) + 0) __promoted_type; |
| }; |
| |
| template <class _Tp> |
| struct __sfinae_underlying_type<_Tp, false> {}; |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| int __convert_to_integral(int __val) { return __val; } |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| unsigned __convert_to_integral(unsigned __val) { return __val; } |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| long __convert_to_integral(long __val) { return __val; } |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| unsigned long __convert_to_integral(unsigned long __val) { return __val; } |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| long long __convert_to_integral(long long __val) { return __val; } |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| unsigned long long __convert_to_integral(unsigned long long __val) {return __val; } |
| |
| template<typename _Fp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| typename enable_if<is_floating_point<_Fp>::value, long long>::type |
| __convert_to_integral(_Fp __val) { return __val; } |
| |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| __int128_t __convert_to_integral(__int128_t __val) { return __val; } |
| |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| __uint128_t __convert_to_integral(__uint128_t __val) { return __val; } |
| #endif |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR |
| typename __sfinae_underlying_type<_Tp>::__promoted_type |
| __convert_to_integral(_Tp __val) { return __val; } |
| |
| // These traits are used in __tree and __hash_table |
| struct __extract_key_fail_tag {}; |
| struct __extract_key_self_tag {}; |
| struct __extract_key_first_tag {}; |
| |
| template <class _ValTy, class _Key, |
| class _RawValTy = typename __unconstref<_ValTy>::type> |
| struct __can_extract_key |
| : conditional<_IsSame<_RawValTy, _Key>::value, __extract_key_self_tag, |
| __extract_key_fail_tag>::type {}; |
| |
| template <class _Pair, class _Key, class _First, class _Second> |
| struct __can_extract_key<_Pair, _Key, pair<_First, _Second> > |
| : conditional<_IsSame<typename remove_const<_First>::type, _Key>::value, |
| __extract_key_first_tag, __extract_key_fail_tag>::type {}; |
| |
| // __can_extract_map_key uses true_type/false_type instead of the tags. |
| // It returns true if _Key != _ContainerValueTy (the container is a map not a set) |
| // and _ValTy == _Key. |
| template <class _ValTy, class _Key, class _ContainerValueTy, |
| class _RawValTy = typename __unconstref<_ValTy>::type> |
| struct __can_extract_map_key |
| : integral_constant<bool, _IsSame<_RawValTy, _Key>::value> {}; |
| |
| // This specialization returns __extract_key_fail_tag for non-map containers |
| // because _Key == _ContainerValueTy |
| template <class _ValTy, class _Key, class _RawValTy> |
| struct __can_extract_map_key<_ValTy, _Key, _Key, _RawValTy> |
| : false_type {}; |
| |
| template <class _CharT> |
| using _IsCharLikeType = _And<is_standard_layout<_CharT>, is_trivial<_CharT> >; |
| |
| template<class _Tp> |
| using __make_const_lvalue_ref = const typename remove_reference<_Tp>::type&; |
| |
| template<bool _Const, class _Tp> |
| using __maybe_const = typename conditional<_Const, const _Tp, _Tp>::type; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_TYPE_TRAITS |
