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52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
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// Copyright Aleksey Gurtovoy 2000-2004
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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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// $Date$
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// $Revision$
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#include <boost/mpl/advance.hpp>
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#include <boost/mpl/iterator_tags.hpp>
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#include <boost/mpl/aux_/test.hpp>
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template< int pos > struct iter
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{
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typedef mpl::bidirectional_iterator_tag category;
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typedef iter<(pos + 1)> next;
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typedef iter<(pos - 1)> prior;
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typedef int_<pos> type;
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};
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#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
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namespace boost { namespace mpl {
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template< int pos, typename Default > struct tag< iter<pos>,Default > : void_ {};
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}}
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#endif
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typedef iter<0> first;
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typedef iter<10> last;
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MPL_TEST_CASE()
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{
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typedef mpl::advance<first,int_<10> >::type iter1;
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typedef advance_c<first,10>::type iter2;
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MPL_ASSERT(( is_same<iter1, last> ));
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MPL_ASSERT(( is_same<iter2, last> ));
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}
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MPL_TEST_CASE()
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{
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typedef mpl::advance<last,int_<-10> >::type iter1;
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typedef advance_c<last,-10>::type iter2;
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MPL_ASSERT(( is_same<iter1, first> ));
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MPL_ASSERT(( is_same<iter2, first> ));
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}
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