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Use new iterator_adaptor<> interface

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[SVN r9106]
This commit is contained in:
Dave Abrahams
2001-02-11 03:10:01 +00:00
parent c585adde71
commit ad4c5ab089
1 changed files with 21 additions and 3 deletions
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24
include/boost/counting_iterator.hpp
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@ -28,8 +28,9 @@
// Incrementable.
//
// Revision History
// 10 Feb 2001 Use new iterator_adaptor<> interface (David Abrahams)
// 10 Feb 2001 Rolled in supposed Borland fixes from John Maddock, but not
// seeing any improvement yet
// seeing any improvement yet (David Abrahams)
// 09 Feb 2001 Factored out is_numeric computation. Borland still
// unhappy :( (David Abrahams)
// 08 Feb 2001 Beginning of a failed attempt to appease Borland
@ -189,9 +190,16 @@ struct counting_iterator_policies : public default_iterator_policies
template <class Incrementable>
struct counting_iterator_generator
{
typedef counting_iterator_traits<Incrementable> traits;
typedef iterator_adaptor<Incrementable,
counting_iterator_policies<Incrementable>,
counting_iterator_traits<Incrementable> > type;
typename traits::value_type,
typename traits::reference,
typename traits::pointer,
typename traits::iterator_category,
typename traits::difference_type
> type;
};
// Manufacture a counting iterator for an arbitrary incrementable type
@ -199,9 +207,19 @@ template <class Incrementable>
inline typename counting_iterator_generator<Incrementable>::type
make_counting_iterator(Incrementable x)
{
typedef counting_iterator_traits<Incrementable> traits;
// These typedefs appease MSVC
typedef typename traits::value_type value_type;
typedef typename traits::reference reference;
typedef typename traits::pointer pointer;
typedef typename traits::iterator_category iterator_category;
typedef typename traits::difference_type difference_type;
return iterator_adaptor<Incrementable,
counting_iterator_policies<Incrementable>,
counting_iterator_traits<Incrementable> >(x);
value_type, reference, pointer, iterator_category,difference_type
>(x);
}