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 an 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.

Template parameters

T

-

a type to check

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>

Notes

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

See also

is_scalar (C++11)	checks if a type is a scalar type (class template)
is_array (C++11)	checks if a type is an array type (class template)
is_aggregate (C++17)	checks if a type is an aggregate type (class template)