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### is_object

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

Inherits: 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.

C++ Standard Reference: 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`.