std::is_abstract

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Defined in header <type_traits>

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template< class T >
struct is_abstract;

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If T is an abstract class (that is, a class that declares or inherits at least one pure virtual function), provides the member constant value equal Template:cpp. For any other type, value is Template:cpp.

Inherited from std::integral_constant

Member constants

value [static]

true if T is an abstract class 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

Abstract classes may only be used as base classes; no objects of an abstract class type can be created except in form of base class subobjects.

An abstract class may be derived from a class that is not abstract, and a pure virtual function may override a virtual function that is not pure.

See also

is_class (C++11)	checks if a type is a non-union class type (class template)
is_polymorphic (C++11)	checks if a type is a polymorphic class type (class template)