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- //=======================================================================
- // Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee,
- //
- // Distributed under the Boost Software License, Version 1.0. (See
- // accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- //=======================================================================
- #include <vector>
- #include <string>
- #include <boost/property_map/property_map.hpp>
- #include <boost/concept/assert.hpp>
- #ifdef BOOST_NO_STD_ITERATOR_TRAITS
- #error This examples requires a compiler that provides a working std::iterator_traits
- #endif
- namespace foo
- {
- using namespace boost;
- template < class RandomAccessIterator, class IndexMap >
- class iterator_property_map:public boost::put_get_helper <
- typename std::iterator_traits < RandomAccessIterator >::reference,
- iterator_property_map < RandomAccessIterator, IndexMap > >
- {
- public:
- typedef std::ptrdiff_t key_type;
- typedef typename std::iterator_traits < RandomAccessIterator >::value_type
- value_type;
- typedef typename std::iterator_traits < RandomAccessIterator >::reference
- reference;
- typedef boost::lvalue_property_map_tag category;
- iterator_property_map(RandomAccessIterator cc = RandomAccessIterator(),
- const IndexMap & _id =
- IndexMap()):iter(cc), index(_id)
- {
- }
- reference operator[] (std::ptrdiff_t v) const
- {
- return *(iter + get(index, v));
- }
- protected:
- RandomAccessIterator iter;
- IndexMap index;
- };
- }
- int
- main()
- {
- typedef std::vector < std::string > vec_t;
- typedef foo::iterator_property_map < vec_t::iterator,
- boost::identity_property_map > pmap_t;
- using namespace boost;
- BOOST_CONCEPT_ASSERT(( Mutable_LvaluePropertyMapConcept<pmap_t, int> ));
- return 0;
- }
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