| [/ |
| 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_object is_object] |
| template <class T> |
| struct is_object : public __tof {}; |
| |
| __inherit If T is a (possibly cv-qualified) object type |
| then inherits from __true_type, |
| otherwise inherits from __false_type. All types are object types except |
| references, void, and function types. |
| |
| __std_ref 3.9p9. |
| |
| __header ` #include <boost/type_traits/is_object.hpp>` or ` #include <boost/type_traits.hpp>` |
| |
| __examples |
| |
| [:`is_object<int>` inherits from `__true_type`.] |
| |
| [:`is_object<int*>::type` is the type `__true_type`.] |
| |
| [:`is_object<int (*)(void)>::value` is an integral constant |
| expression that evaluates to /true/.] |
| |
| [:`is_object<int (MyClass::*)(void)const>::value` is an integral constant |
| expression that evaluates to /true/.] |
| |
| [:`is_object<int &>::value` is an integral constant |
| expression that evaluates to /false/: reference types are not objects] |
| |
| [:`is_object<int (double)>::value` is an integral constant |
| expression that evaluates to /false/: function types are not objects] |
| |
| [:`is_object<const void>::value` is an integral constant |
| expression that evaluates to /false/: void is not an object type] |
| |
| [:`is_object<T>::value_type` is the type `bool`.] |
| |
| [endsect] |
| |