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std::is_implicit_lifetime

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Defined in header <type_traits>
template< class T >
struct is_implicit_lifetime;
(since C++23)

std::is_implicit_lifetime is a UnaryTypeTrait.

If T is an implicit-lifetime type, provides the member constant value equal to true. For any other type, value is false.

The behavior is undefined if T is an incomplete type other than an array type or (possibly cv-qualified) void.

The behavior of a program that adds specializations for std::is_implicit_lifetime or std::is_implicit_lifetime_v is undefined.

Contents

[edit] Template parameters

T - a type to check

[edit] Helper variable template

template< class T >
inline constexpr bool is_implicit_lifetime_v = is_implicit_lifetime<T>::value;
(since C++23)

Inherited from std::integral_constant

Member constants

value
[static]
true if T is an implicit-lifetime type, false otherwise
(public static member constant)

Member functions

operator bool
converts the object to bool, returns value
(public member function)
operator()
(C++14)
returns value
(public member function)

Member types

Type Definition
value_type bool
type std::integral_constant<bool, value>

[edit] Notes

Feature-test macro Value Std Feature
__cpp_lib_is_implicit_lifetime 202302L (C++23) std::is_implicit_lifetime

[edit] Example

[edit] See also

(C++11)
checks if a type is a scalar type
(class template) [edit]
(C++11)
checks if a type is an array type
(class template) [edit]
checks if a type is an aggregate type
(class template) [edit]
implicitly creates objects in given storage with the object representation reused
(function template) [edit]