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1 | // Boost.TypeErasure library |
2 | // | |
3 | // Copyright 2012 Steven Watanabe | |
4 | // | |
5 | // Distributed under the Boost Software License Version 1.0. (See | |
6 | // accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // $Id$ | |
10 | ||
11 | #ifndef BOOST_TYPE_ERASURE_IS_EMPTY_HPP_INCLUDED | |
12 | #define BOOST_TYPE_ERASURE_IS_EMPTY_HPP_INCLUDED | |
13 | ||
14 | #include <boost/type_erasure/detail/access.hpp> | |
15 | ||
16 | namespace boost { | |
17 | namespace type_erasure { | |
18 | ||
19 | /** Returns true for an empty @ref any. */ | |
20 | template<class T> | |
21 | bool is_empty(const T& arg) { | |
22 | return ::boost::type_erasure::detail::access::data(arg).data == 0; | |
23 | } | |
24 | ||
25 | } | |
26 | } | |
27 | ||
28 | #endif |