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Factored counting_iterator stuff into boost/counting_iterator.hpp

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[SVN r8935]
This commit is contained in:
Dave Abrahams
2001-02-04 23:37:01 +00:00
parent 3e6796ab91
commit 7aea7b7881
1 changed files with 10 additions and 50 deletions
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60
include/boost/pending/integer_range.hpp
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@ -1,63 +1,27 @@
// (C) Copyright David Abrahams 2000. Permission to copy, use, // (C) Copyright David Abrahams and Jeremy Siek 2000-2001. Permission to copy,
// modify, sell and distribute this software is granted provided this // use, modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided // copyright notice appears in all copies. This software is provided "as is"
// "as is" without express or implied warranty, and with no claim as // without express or implied warranty, and with no claim as to its suitability
// to its suitability for any purpose. // for any purpose.
// //
// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify, // Revision History:
// sell and distribute this software is granted provided this // 04 Jan 2001 Factored counting_iterator stuff into
// copyright notice appears in all copies. This software is provided // boost/counting_iterator.hpp (David Abrahams)
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_INTEGER_RANGE_HPP_ #ifndef BOOST_INTEGER_RANGE_HPP_
#define BOOST_INTEGER_RANGE_HPP_ #define BOOST_INTEGER_RANGE_HPP_
#include <boost/config.hpp> #include <boost/config.hpp>
#include <boost/counting_iterator.hpp>
#if 1
// Still evaluating whether VC++ can handle this.
#define BOOST_USE_ITERATOR_ADAPTORS
#endif
#ifdef BOOST_USE_ITERATOR_ADAPTORS
#include <boost/pending/iterator_adaptors.hpp>
#else
#include <boost/pending/detail/int_iterator.hpp>
#endif
namespace boost { namespace boost {
//============================================================================= //=============================================================================
// Counting Iterator and Integer Range Class // Counting Iterator and Integer Range Class
#ifdef BOOST_USE_ITERATOR_ADAPTORS
template <class IntegerType>
struct counting_iterator_policies : public default_iterator_policies
{
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;
};
#endif
template <class IntegerType> template <class IntegerType>
struct integer_range { struct integer_range {
#ifdef BOOST_USE_ITERATOR_ADAPTORS typedef typename counting_iterator_generator<IntegerType>::type iterator;
typedef iterator_adaptor<IntegerType,
counting_iterator_policies<IntegerType>,
counting_iterator_traits<IntegerType> > iterator;
#else
typedef int_iterator<IntegerType> iterator;
#endif
typedef iterator const_iterator; typedef iterator const_iterator;
typedef IntegerType value_type; typedef IntegerType value_type;
@ -92,8 +56,4 @@ make_integer_range(IntegerType first, IntegerType last)
} // namespace boost } // namespace boost
#ifdef BOOST_USE_ITERATOR_ADAPTORS
#undef BOOST_USE_ITERATOR_ADAPTORS
#endif
#endif // BOOST_INTEGER_RANGE_HPP_ #endif // BOOST_INTEGER_RANGE_HPP_