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80 lines
1.8 KiB
80 lines
1.8 KiB
// (C) Copyright Jens Maurer 2001. |
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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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// Revision History: |
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// 15 Nov 2001 Jens Maurer |
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// created. |
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// See http://www.boost.org/libs/utility/iterator_adaptors.htm for documentation. |
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#ifndef BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP |
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#define BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP |
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#include <boost/iterator/iterator_facade.hpp> |
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#include <boost/ref.hpp> |
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namespace boost { |
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template<class Generator> |
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class generator_iterator |
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: public iterator_facade< |
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generator_iterator<Generator> |
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, typename Generator::result_type |
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, single_pass_traversal_tag |
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, typename Generator::result_type const& |
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> |
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{ |
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typedef iterator_facade< |
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generator_iterator<Generator> |
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, typename Generator::result_type |
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, single_pass_traversal_tag |
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, typename Generator::result_type const& |
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> super_t; |
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public: |
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generator_iterator() {} |
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generator_iterator(Generator* g) : m_g(g), m_value((*m_g)()) {} |
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void increment() |
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{ |
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m_value = (*m_g)(); |
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} |
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const typename Generator::result_type& |
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dereference() const |
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{ |
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return m_value; |
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} |
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bool equal(generator_iterator const& y) const |
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{ |
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return this->m_g == y.m_g && this->m_value == y.m_value; |
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} |
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private: |
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Generator* m_g; |
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typename Generator::result_type m_value; |
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}; |
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template<class Generator> |
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struct generator_iterator_generator |
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{ |
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typedef generator_iterator<Generator> type; |
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}; |
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template <class Generator> |
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inline generator_iterator<Generator> |
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make_generator_iterator(Generator & gen) |
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{ |
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typedef generator_iterator<Generator> result_t; |
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return result_t(&gen); |
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} |
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} // namespace boost |
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#endif // BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP |
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