Boost C++ Libraries

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is_polymorphic

template <class T>
struct is_polymorphic : public true_type-or-false_type {};

Inherits: If T is a (possibly cv-qualified) polymorphic type then inherits from true_type, otherwise inherits from false_type. Type T must be a complete type.

C++ Standard Reference: 10.3.

Compiler Compatibility: The implementation requires some knowledge of the compilers ABI, it does actually seem to work with the majority of compilers though.

Header: #include <boost/type_traits/is_polymorphic.hpp> or #include <boost/type_traits.hpp>

Examples:

Given: class poly{ virtual ~poly(); };

is_polymorphic<poly> inherits from true_type.

is_polymorphic<poly const>::type is the type true_type.

is_polymorphic<poly>::value is an integral constant expression that evaluates to true.

is_polymorphic<T>::value_type is the type bool.


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