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moved integer_range to its own file

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[SVN r7717]
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Jeremy Siek
2000-09-18 09:49:29 +00:00
parent 7b17be08a2
commit 59a54ab5bd
2 changed files with 144 additions and 0 deletions
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include/boost/pending/integer_range.hpp Normal file
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// (C) Copyright David Abrahams 2000. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
//
// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_INTEGER_RANGE_HPP_
#define BOOST_INTEGER_RANGE_HPP_
#ifdef BOOST_MSVC
#include <boost/pending/detail/int_iterator.hpp>
#else
#include <boost/pending/iterator_adaptor.hpp>
#endif
namespace boost {
//=============================================================================
// Counting Iterator and Integer Range Class
struct counting_iterator_policies : public default_iterator_policies
{
template <class IntegerType>
IntegerType dereference(type<IntegerType>, const IntegerType& i) const
{ return i; }
};
template <class IntegerType>
struct counting_iterator_traits {
typedef IntegerType value_type;
typedef IntegerType reference;
typedef value_type* pointer;
typedef std::ptrdiff_t difference_type;
typedef std::random_access_iterator_tag iterator_category;
};
template <class IntegerType>
struct integer_range {
#ifdef BOOST_MSVC
typedef int_iterator<IntegerType> iterator;
#else
typedef iterator_adaptor<IntegerType, counting_iterator_policies,
counting_iterator_traits<IntegerType>, IntegerType> iterator;
#endif
typedef iterator const_iterator;
typedef IntegerType value_type;
typedef std::ptrdiff_t difference_type;
typedef IntegerType reference;
typedef IntegerType const_reference;
typedef const IntegerType* pointer;
typedef const IntegerType* const_pointer;
typedef IntegerType size_type;
integer_range(IntegerType start, IntegerType finish)
: m_start(start), m_finish(finish) { }
iterator begin() const { return iterator(m_start); }
iterator end() const { return iterator(m_finish); }
size_type size() const { return m_finish - m_start; }
bool empty() const { return m_finish == m_start; }
void swap(integer_range& x) {
std::swap(m_start, x.m_start);
std::swap(m_finish, x.m_finish);
}
protected:
IntegerType m_start, m_finish;
};
} // namespace boost
#endif // BOOST_INTEGER_RANGE_HPP_