53 lines
1.0 KiB
C++
53 lines
1.0 KiB
C++
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// Copyright Steven Watanabe 2009
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date: 2008-10-10 02:21:07 -0700 (Fri, 10 Oct 2008) $
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// $Revision: 49240 $
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#include <boost/mpl/push_back.hpp>
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#include <boost/mpl/aux_/test.hpp>
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struct no_push_back_tag {};
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struct no_push_back
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{
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typedef no_push_back_tag tag;
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};
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struct has_push_back_tag {};
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struct with_push_back
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{
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typedef has_push_back_tag tag;
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};
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namespace boost { namespace mpl {
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template<>
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struct push_back_impl< has_push_back_tag >
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{
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template<class Seq, class T> struct apply
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{
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typedef no_push_back type;
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};
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};
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}}
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MPL_TEST_CASE()
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{
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MPL_ASSERT_NOT(( has_push_back< no_push_back > ));
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MPL_ASSERT(( has_push_back< with_push_back > ));
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typedef push_back< with_push_back , int >::type test;
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MPL_ASSERT(( is_same< test, no_push_back > ));
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}
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