| [/ |
| Copyright 2007 John Maddock. |
| Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file LICENSE_1_0.txt or copy at |
| http://www.boost.org/LICENSE_1_0.txt). |
| ] |
| |
| [section:is_polymorphic is_polymorphic] |
| template <class T> |
| struct is_polymorphic : public __tof {}; |
| |
| __inherit 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. |
| |
| __std_ref 10.3. |
| |
| __compat 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`.] |
| |
| [endsect] |
| |