std::is_member_object_pointer
From cppreference.com
Defined in header
<type_traits>
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||
template< class T >
struct is_member_object_pointer; |
(since C++11) | |
Checks whether T
is a non-static member object. Provides the member constant value
which is equal to true, if T
is a non-static member object type. Otherwise, value
is equal to false.
Contents |
[edit] Template parameters
T | - | a type to check |
Inherited from std::integral_constant
Member constants
value
[static]
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true if T is a pointer to member object , false otherwise (public static member constant) |
Member functions
operator bool |
converts the object to bool, returns value (public member function) |
operator()
(C++14)
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returns value (public member function) |
Member types
Type | Definition |
value_type
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bool
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type
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std::integral_constant<bool, value> |
[edit] Possible implementation
template<class T> struct is_member_object_pointer : std::integral_constant< bool, std::is_member_pointer<T>::value && !std::is_member_function_pointer<T>::value > {}; |
[edit] Example
This section is incomplete Reason: simplify |
Run this code
#include <iostream> #include <type_traits> int main() { class cls {}; std::cout << (std::is_member_object_pointer<int(cls::*)>::value ? "T is member object pointer" : "T is not a member object pointer") << '\n'; std::cout << (std::is_member_object_pointer<int(cls::*)()>::value ? "T is member object pointer" : "T is not a member object pointer") << '\n'; }
Output:
T is member object pointer T is not a member object pointer
[edit] See also
(C++11)
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checks if a type is a pointer type (class template) |
(C++11)
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checks if a type is a pointer to a non-static member function or object (class template) |
(C++11)
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checks if a type is a pointer to a non-static member function (class template) |
(library fundamentals TS)
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variable template alias of std::is_member_object_pointer::value (variable template) |