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