| 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 |
|---|
| 29 | |
|---|
