std::is_object
Defined in header <type_traits>
|
||
template< class T > struct is_object; |
(since C++11) | |
If T
is an object type (that is any possibly cv-qualified type other than function, reference, or void types), provides the member constant value
equal true. For any other type, value
is false.
Template parameters
T | - | a type to check |
Helper variable template
template< class T > inline constexpr bool is_object_v = is_object<T>::value; |
(since C++17) | |
Inherited from std::integral_constant
Member constants
value [static] |
true if T is an object 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> |
Possible implementation
template< class T> struct is_object : std::integral_constant<bool, std::is_scalar<T>::value || std::is_array<T>::value || std::is_union<T>::value || std::is_class<T>::value> {}; |
Example
Run this code
Output:
true false true false
See also
(C++11) |
checks if a type is a scalar type (class template) |
(C++11) |
checks if a type is an array type (class template) |
(C++11) |
checks if a type is an union type (class template) |
(C++11) |
checks if a type is a non-union class type (class template) |