libstdc++
Metaprogramming
Collaboration diagram for Metaprogramming:

Modules

 Variable templates for type traits.
 

Classes

struct  std::__is_nullptr_t< _Tp >
 
struct  std::tr2::__reflection_typelist< _Elements >
 
struct  std::add_lvalue_reference< _Tp >
 
struct  std::add_pointer< _Tp >
 
struct  std::add_rvalue_reference< _Tp >
 
struct  std::common_type< _Tp >
 
struct  std::conditional< _Cond, _Iftrue, _Iffalse >
 
struct  std::enable_if< bool, _Tp >
 
struct  std::extent< typename, _Uint >
 
struct  std::is_abstract< _Tp >
 
struct  std::is_arithmetic< _Tp >
 
struct  std::is_array< typename >
 
struct  std::is_base_of< _Base, _Derived >
 
struct  std::is_class< _Tp >
 
struct  std::is_compound< _Tp >
 
struct  std::is_const< typename >
 
struct  std::is_convertible< _From, _To >
 
struct  std::is_empty< _Tp >
 
struct  std::is_enum< _Tp >
 
struct  std::is_final< _Tp >
 
struct  std::is_floating_point< _Tp >
 
struct  std::is_function< _Tp >
 
struct  std::is_fundamental< _Tp >
 
struct  std::is_integral< _Tp >
 
struct  std::is_lvalue_reference< typename >
 
struct  std::is_member_function_pointer< _Tp >
 
struct  std::is_member_object_pointer< _Tp >
 
struct  std::is_member_pointer< _Tp >
 
struct  std::is_null_pointer< _Tp >
 
struct  std::is_object< _Tp >
 
struct  std::is_pointer< _Tp >
 
struct  std::is_polymorphic< _Tp >
 
struct  std::is_reference< _Tp >
 
struct  std::is_rvalue_reference< typename >
 
struct  std::is_same< _Tp, _Up >
 
struct  std::is_scalar< _Tp >
 
struct  std::is_signed< _Tp >
 
struct  std::is_union< _Tp >
 
struct  std::is_unsigned< _Tp >
 
struct  std::is_void< _Tp >
 
struct  std::is_volatile< typename >
 
struct  std::rank< typename >
 
struct  std::remove_all_extents< _Tp >
 
struct  std::remove_cv< _Tp >
 
struct  std::remove_pointer< _Tp >
 
struct  std::result_of< _Signature >
 
struct  std::underlying_type< _Tp >
 

Macros

#define __cpp_lib_bool_constant
 
#define __cpp_lib_is_final
 
#define __cpp_lib_is_invocable
 
#define __cpp_lib_is_null_pointer
 
#define __cpp_lib_is_swappable
 
#define __cpp_lib_logical_traits
 
#define __cpp_lib_result_of_sfinae
 
#define __cpp_lib_transformation_trait_aliases
 
#define __cpp_lib_type_trait_variable_templates
 
#define __cpp_lib_void_t
 

Typedefs

template<typename _ToElementType , typename _FromElementType >
using std::__is_array_convertible = is_convertible< _FromElementType(*)[], _ToElementType(*)[]>
 
template<typename _Tp , typename _Up >
using std::__is_nothrow_assignable_impl = __bool_constant< __is_nothrow_assignable(_Tp, _Up)>
 
template<typename _Tp >
using std::add_const_t = typename add_const< _Tp >::type
 
template<typename _Tp >
using std::add_cv_t = typename add_cv< _Tp >::type
 
template<typename _Tp >
using std::add_lvalue_reference_t = typename add_lvalue_reference< _Tp >::type
 
template<typename _Tp >
using std::add_pointer_t = typename add_pointer< _Tp >::type
 
template<typename _Tp >
using std::add_rvalue_reference_t = typename add_rvalue_reference< _Tp >::type
 
template<typename _Tp >
using std::add_volatile_t = typename add_volatile< _Tp >::type
 
template<size_t _Len, size_t _Align = __alignof__(typename __aligned_storage_msa<_Len>::__type)>
using std::aligned_storage_t = typename aligned_storage< _Len, _Align >::type
 
template<size_t _Len, typename... _Types>
using std::aligned_union_t = typename aligned_union< _Len, _Types... >::type
 
template<bool __v>
using std::bool_constant = integral_constant< bool, __v >
 
template<typename... _Tp>
using std::common_type_t = typename common_type< _Tp... >::type
 
template<bool _Cond, typename _Iftrue , typename _Iffalse >
using std::conditional_t = typename conditional< _Cond, _Iftrue, _Iffalse >::type
 
template<typename _Tp >
using std::decay_t = typename decay< _Tp >::type
 
template<bool _Cond, typename _Tp = void>
using std::enable_if_t = typename enable_if< _Cond, _Tp >::type
 
using std::false_type = integral_constant< bool, false >
 
template<typename _Fn , typename... _Args>
using std::invoke_result_t = typename invoke_result< _Fn, _Args... >::type
 
template<typename _Tp >
using std::make_signed_t = typename make_signed< _Tp >::type
 
template<typename _Tp >
using std::make_unsigned_t = typename make_unsigned< _Tp >::type
 
template<typename _Tp >
using std::remove_all_extents_t = typename remove_all_extents< _Tp >::type
 
template<typename _Tp >
using std::remove_const_t = typename remove_const< _Tp >::type
 
template<typename _Tp >
using std::remove_cv_t = typename remove_cv< _Tp >::type
 
template<typename _Tp >
using std::remove_extent_t = typename remove_extent< _Tp >::type
 
template<typename _Tp >
using std::remove_pointer_t = typename remove_pointer< _Tp >::type
 
template<typename _Tp >
using std::remove_reference_t = typename remove_reference< _Tp >::type
 
template<typename _Tp >
using std::remove_volatile_t = typename remove_volatile< _Tp >::type
 
template<typename _Tp >
using std::result_of_t = typename result_of< _Tp >::type
 
using std::true_type = integral_constant< bool, true >
 
template<typename _Tp >
using std::underlying_type_t = typename underlying_type< _Tp >::type
 
template<typename... >
using std::void_t = void
 

Functions

template<typename _Tp >
constexpr _Require< __not_< __is_tuple_like< _Tp > >, is_move_constructible< _Tp >, is_move_assignable< _Tp > > std::swap (_Tp &, _Tp &) noexcept(__and_< is_nothrow_move_constructible< _Tp >, is_nothrow_move_assignable< _Tp >>::value)
 
template<typename _Tp , size_t _Nm>
constexpr __enable_if_t< __is_swappable< _Tp >::value > std::swap (_Tp(&__a)[_Nm], _Tp(&__b)[_Nm]) noexcept(__is_nothrow_swappable< _Tp >::value)
 

Variables

static const size_t std::aligned_union< _Len, _Types >::alignment_value
 
template<typename _Tp >
constexpr bool std::is_nothrow_swappable_v
 
template<typename _Tp , typename _Up >
constexpr bool std::is_nothrow_swappable_with_v
 
template<typename _Tp >
constexpr bool std::is_swappable_v
 
template<typename _Tp , typename _Up >
constexpr bool std::is_swappable_with_v
 
static constexpr _Tp std::integral_constant< _Tp, __v >::value
 
template<typename... _Bn>
constexpr bool std::disjunction_v
 
template<typename _Pp >
constexpr bool std::negation_v
 
template<typename _Tp >
constexpr bool std::is_null_pointer_v
 
template<typename _Tp >
constexpr bool std::is_integral_v
 
template<typename _Tp >
constexpr bool std::is_floating_point_v
 
template<typename _Tp >
constexpr bool std::is_array_v
 
template<typename _Tp >
constexpr bool std::is_pointer_v
 
template<typename _Tp >
constexpr bool std::is_lvalue_reference_v
 
template<typename _Tp >
constexpr bool std::is_rvalue_reference_v
 
template<typename _Tp >
constexpr bool std::is_member_object_pointer_v
 
template<typename _Tp >
constexpr bool std::is_member_function_pointer_v
 
template<typename _Tp >
constexpr bool std::is_enum_v
 
template<typename _Tp >
constexpr bool std::is_union_v
 
template<typename _Tp >
constexpr bool std::is_class_v
 
template<typename _Tp >
constexpr bool std::is_function_v
 
template<typename _Tp >
constexpr bool std::is_reference_v
 
template<typename _Tp >
constexpr bool std::is_arithmetic_v
 
template<typename _Tp >
constexpr bool std::is_fundamental_v
 
template<typename _Tp >
constexpr bool std::is_object_v
 
template<typename _Tp >
constexpr bool std::is_scalar_v
 
template<typename _Tp >
constexpr bool std::is_compound_v
 
template<typename _Tp >
constexpr bool std::is_member_pointer_v
 
template<typename _Tp >
constexpr bool std::is_const_v
 
template<typename _Tp >
constexpr bool std::is_volatile_v
 
template<typename _Tp >
constexpr bool std::is_trivial_v
 
template<typename _Tp >
constexpr bool std::is_trivially_copyable_v
 
template<typename _Tp >
constexpr bool std::is_standard_layout_v
 
template<typename _Tp >
constexpr bool std::is_pod_v
 
template<typename _Tp >
constexpr bool std::is_literal_type_v
 
template<typename _Tp >
constexpr bool std::is_empty_v
 
template<typename _Tp >
constexpr bool std::is_polymorphic_v
 
template<typename _Tp >
constexpr bool std::is_abstract_v
 
template<typename _Tp >
constexpr bool std::is_final_v
 
template<typename _Tp >
constexpr bool std::is_signed_v
 
template<typename _Tp >
constexpr bool std::is_unsigned_v
 
template<typename _Tp , typename... _Args>
constexpr bool std::is_constructible_v
 
template<typename _Tp >
constexpr bool std::is_default_constructible_v
 
template<typename _Tp >
constexpr bool std::is_copy_constructible_v
 
template<typename _Tp >
constexpr bool std::is_move_constructible_v
 
template<typename _Tp , typename _Up >
constexpr bool std::is_assignable_v
 
template<typename _Tp >
constexpr bool std::is_copy_assignable_v
 
template<typename _Tp >
constexpr bool std::is_move_assignable_v
 
template<typename _Tp >
constexpr bool std::is_destructible_v
 
template<typename _Tp , typename... _Args>
constexpr bool std::is_trivially_constructible_v
 
template<typename _Tp >
constexpr bool std::is_trivially_default_constructible_v
 
template<typename _Tp >
constexpr bool std::is_trivially_copy_constructible_v
 
template<typename _Tp >
constexpr bool std::is_trivially_move_constructible_v
 
template<typename _Tp , typename _Up >
constexpr bool std::is_trivially_assignable_v
 
template<typename _Tp >
constexpr bool std::is_trivially_copy_assignable_v
 
template<typename _Tp >
constexpr bool std::is_trivially_move_assignable_v
 
template<typename _Tp >
constexpr bool std::is_trivially_destructible_v
 
template<typename _Tp , typename... _Args>
constexpr bool std::is_nothrow_constructible_v
 
template<typename _Tp >
constexpr bool std::is_nothrow_default_constructible_v
 
template<typename _Tp >
constexpr bool std::is_nothrow_copy_constructible_v
 
template<typename _Tp >
constexpr bool std::is_nothrow_move_constructible_v
 
template<typename _Tp , typename _Up >
constexpr bool std::is_nothrow_assignable_v
 
template<typename _Tp >
constexpr bool std::is_nothrow_copy_assignable_v
 
template<typename _Tp >
constexpr bool std::is_nothrow_move_assignable_v
 
template<typename _Tp >
constexpr bool std::is_nothrow_destructible_v
 
template<typename _Tp >
constexpr bool std::has_virtual_destructor_v
 
template<typename _Tp >
constexpr size_t std::alignment_of_v
 
template<typename _Tp >
constexpr size_t std::rank_v
 
template<typename _Tp , unsigned _Idx = 0>
constexpr size_t std::extent_v
 
template<typename _Tp , typename _Up >
constexpr bool std::is_same_v
 
template<typename _Base , typename _Derived >
constexpr bool std::is_base_of_v
 
template<typename _From , typename _To >
constexpr bool std::is_convertible_v
 
template<typename _Fn , typename... _Args>
constexpr bool std::is_invocable_v
 
template<typename _Fn , typename... _Args>
constexpr bool std::is_nothrow_invocable_v
 
template<typename _Ret , typename _Fn , typename... _Args>
constexpr bool std::is_invocable_r_v
 
template<typename _Ret , typename _Fn , typename... _Args>
constexpr bool std::is_nothrow_invocable_r_v
 

Detailed Description

Template utilities for compile-time introspection and modification, including type classification traits, type property inspection traits and type transformation traits.

Since
C++11

Typedef Documentation

◆ add_const_t

template<typename _Tp >
using std::add_const_t = typedef typename add_const<_Tp>::type

Alias template for add_const.

Definition at line 1588 of file type_traits.

◆ add_cv_t

template<typename _Tp >
using std::add_cv_t = typedef typename add_cv<_Tp>::type

Alias template for add_cv.

Definition at line 1596 of file type_traits.

◆ add_lvalue_reference_t

template<typename _Tp >
using std::add_lvalue_reference_t = typedef typename add_lvalue_reference<_Tp>::type

Alias template for add_lvalue_reference.

Definition at line 1649 of file type_traits.

◆ add_pointer_t

template<typename _Tp >
using std::add_pointer_t = typedef typename add_pointer<_Tp>::type

Alias template for add_pointer.

Definition at line 2059 of file type_traits.

◆ add_rvalue_reference_t

template<typename _Tp >
using std::add_rvalue_reference_t = typedef typename add_rvalue_reference<_Tp>::type

Alias template for add_rvalue_reference.

Definition at line 1653 of file type_traits.

◆ add_volatile_t

template<typename _Tp >
using std::add_volatile_t = typedef typename add_volatile<_Tp>::type

Alias template for add_volatile.

Definition at line 1592 of file type_traits.

◆ aligned_storage_t

template<size_t _Len, size_t _Align = __alignof__(typename __aligned_storage_msa<_Len>::__type)>
using std::aligned_storage_t = typedef typename aligned_storage<_Len, _Align>::type

Alias template for aligned_storage.

Definition at line 2574 of file type_traits.

◆ bool_constant

template<bool __v>
using std::bool_constant = typedef integral_constant<bool, __v>

Alias template for compile-time boolean constant types.

Since
C++17

Definition at line 99 of file type_traits.

◆ common_type_t

template<typename... _Tp>
using std::common_type_t = typedef typename common_type<_Tp...>::type

Alias template for common_type.

Definition at line 2593 of file type_traits.

◆ conditional_t

template<bool _Cond, typename _Iftrue , typename _Iffalse >
using std::conditional_t = typedef typename conditional<_Cond, _Iftrue, _Iffalse>::type

Alias template for conditional.

Definition at line 2589 of file type_traits.

◆ decay_t

template<typename _Tp >
using std::decay_t = typedef typename decay<_Tp>::type

Alias template for decay.

Definition at line 2581 of file type_traits.

◆ enable_if_t

template<bool _Cond, typename _Tp = void>
using std::enable_if_t = typedef typename enable_if<_Cond, _Tp>::type

Alias template for enable_if.

Definition at line 2585 of file type_traits.

◆ false_type

using std::false_type = typedef integral_constant<bool, false>

The type used as a compile-time boolean with false value.

Definition at line 86 of file type_traits.

◆ invoke_result_t

template<typename _Fn , typename... _Args>
using std::invoke_result_t = typedef typename invoke_result<_Fn, _Args...>::type

std::invoke_result_t

Definition at line 3009 of file type_traits.

◆ make_signed_t

template<typename _Tp >
using std::make_signed_t = typedef typename make_signed<_Tp>::type

Alias template for make_signed.

Definition at line 1976 of file type_traits.

◆ make_unsigned_t

template<typename _Tp >
using std::make_unsigned_t = typedef typename make_unsigned<_Tp>::type

Alias template for make_unsigned.

Definition at line 1980 of file type_traits.

◆ remove_all_extents_t

template<typename _Tp >
using std::remove_all_extents_t = typedef typename remove_all_extents<_Tp>::type

Alias template for remove_all_extents.

Definition at line 2018 of file type_traits.

◆ remove_const_t

template<typename _Tp >
using std::remove_const_t = typedef typename remove_const<_Tp>::type

Alias template for remove_const.

Definition at line 1576 of file type_traits.

◆ remove_cv_t

template<typename _Tp >
using std::remove_cv_t = typedef typename remove_cv<_Tp>::type

Alias template for remove_cv.

Definition at line 1584 of file type_traits.

◆ remove_extent_t

template<typename _Tp >
using std::remove_extent_t = typedef typename remove_extent<_Tp>::type

Alias template for remove_extent.

Definition at line 2014 of file type_traits.

◆ remove_pointer_t

template<typename _Tp >
using std::remove_pointer_t = typedef typename remove_pointer<_Tp>::type

Alias template for remove_pointer.

Definition at line 2055 of file type_traits.

◆ remove_reference_t

template<typename _Tp >
using std::remove_reference_t = typedef typename remove_reference<_Tp>::type

Alias template for remove_reference.

Definition at line 1645 of file type_traits.

◆ remove_volatile_t

template<typename _Tp >
using std::remove_volatile_t = typedef typename remove_volatile<_Tp>::type

Alias template for remove_volatile.

Definition at line 1580 of file type_traits.

◆ result_of_t

template<typename _Tp >
using std::result_of_t = typedef typename result_of<_Tp>::type

Alias template for result_of.

Definition at line 2601 of file type_traits.

◆ true_type

using std::true_type = typedef integral_constant<bool, true>

The type used as a compile-time boolean with true value.

Definition at line 83 of file type_traits.

◆ underlying_type_t

template<typename _Tp >
using std::underlying_type_t = typedef typename underlying_type<_Tp>::type

Alias template for underlying_type.

Definition at line 2597 of file type_traits.

◆ void_t

template<typename... >
using std::void_t = typedef void

A metafunction that always yields void, used for detecting valid types.

Definition at line 2607 of file type_traits.

Function Documentation

◆ swap() [1/2]

template<typename _Tp >
constexpr _Require<__not_<__is_tuple_like<_Tp> >, is_move_constructible<_Tp>, is_move_assignable<_Tp> > std::swap ( _Tp &  __a,
_Tp &  __b 
)
inlineconstexprnoexcept

Swaps two values.

Parameters
__aA thing of arbitrary type.
__bAnother thing of arbitrary type.
Returns
Nothing.

Definition at line 196 of file move.h.

◆ swap() [2/2]

template<typename _Tp , size_t _Nm>
constexpr __enable_if_t<__is_swappable<_Tp>::value> std::swap ( _Tp(&)  __a[_Nm],
_Tp(&)  __b[_Nm] 
)
inlineconstexprnoexcept

Swap the contents of two arrays.

Definition at line 220 of file move.h.

References std::swap().

Variable Documentation

◆ alignment_value

template<size_t _Len, typename... _Types>
const size_t std::aligned_union< _Len, _Types >::alignment_value
static

The value of the strictest alignment of _Types.

Definition at line 2132 of file type_traits.

◆ is_nothrow_swappable_v

template<typename _Tp >
constexpr bool std::is_nothrow_swappable_v
inlineconstexpr

is_nothrow_swappable_v

Definition at line 2775 of file type_traits.

◆ is_nothrow_swappable_with_v

template<typename _Tp , typename _Up >
constexpr bool std::is_nothrow_swappable_with_v
inlineconstexpr

is_nothrow_swappable_with_v

Definition at line 2871 of file type_traits.

◆ is_swappable_v

template<typename _Tp >
constexpr bool std::is_swappable_v
inlineconstexpr

is_swappable_v

Definition at line 2770 of file type_traits.

◆ is_swappable_with_v

template<typename _Tp , typename _Up >
constexpr bool std::is_swappable_with_v
inlineconstexpr

is_swappable_with_v

Definition at line 2866 of file type_traits.