29 lines
663 B
C++
29 lines
663 B
C++
// Boost.TypeErasure library
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//
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// Copyright 2012 Steven Watanabe
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//
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// Distributed under the Boost Software License Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// $Id: is_empty.hpp 80968 2012-10-12 20:25:51Z steven_watanabe $
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#ifndef BOOST_TYPE_ERASURE_IS_EMPTY_HPP_INCLUDED
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#define BOOST_TYPE_ERASURE_IS_EMPTY_HPP_INCLUDED
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#include <boost/type_erasure/detail/access.hpp>
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namespace boost {
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namespace type_erasure {
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/** Returns true for an empty @ref any. */
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template<class T>
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bool is_empty(const T& arg) {
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return ::boost::type_erasure::detail::access::data(arg).data == 0;
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}
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}
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}
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#endif
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