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Removed workarounds for older compilers from permutation_iterator.hpp.

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Andrey Semashev 2025-02-07 00:19:46 +03:00
parent a91fc06bb4
commit 34f703cfb6
1 changed files with 50 additions and 42 deletions
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92
include/boost/iterator/permutation_iterator.hpp
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@ -5,8 +5,8 @@
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_PERMUTATION_ITERATOR_HPP
#define BOOST_PERMUTATION_ITERATOR_HPP
#ifndef BOOST_ITERATOR_PERMUTATION_ITERATOR_HPP_INCLUDED_
#define BOOST_ITERATOR_PERMUTATION_ITERATOR_HPP_INCLUDED_
#include <iterator>
@ -17,54 +17,62 @@
namespace boost {
namespace iterators {
template< class ElementIterator
, class IndexIterator>
class permutation_iterator
: public iterator_adaptor<
permutation_iterator<ElementIterator, IndexIterator>
, IndexIterator, typename std::iterator_traits<ElementIterator>::value_type
, use_default, typename std::iterator_traits<ElementIterator>::reference>
template< typename ElementIterator, typename IndexIterator >
class permutation_iterator :
public iterator_adaptor<
permutation_iterator< ElementIterator, IndexIterator >,
IndexIterator,
typename std::iterator_traits< ElementIterator >::value_type,
use_default,
typename std::iterator_traits< ElementIterator >::reference
>
{
typedef iterator_adaptor<
permutation_iterator<ElementIterator, IndexIterator>
, IndexIterator, typename std::iterator_traits<ElementIterator>::value_type
, use_default, typename std::iterator_traits<ElementIterator>::reference> super_t;
friend class iterator_core_access;
public:
permutation_iterator() : m_elt_iter() {}
explicit permutation_iterator(ElementIterator x, IndexIterator y)
: super_t(y), m_elt_iter(x) {}
template<class OtherElementIterator, class OtherIndexIterator>
permutation_iterator(
permutation_iterator<OtherElementIterator, OtherIndexIterator> const& r
, typename enable_if_convertible<OtherElementIterator, ElementIterator>::type* = 0
, typename enable_if_convertible<OtherIndexIterator, IndexIterator>::type* = 0
)
: super_t(r.base()), m_elt_iter(r.m_elt_iter)
{}
friend class iterator_core_access;
template< typename, typename >
friend class permutation_iterator;
private:
typename super_t::reference dereference() const
{ return *(m_elt_iter + *this->base()); }
using super_t = iterator_adaptor<
permutation_iterator< ElementIterator, IndexIterator >,
IndexIterator,
typename std::iterator_traits< ElementIterator >::value_type,
use_default,
typename std::iterator_traits< ElementIterator >::reference
>;
#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
template <class,class> friend class permutation_iterator;
#else
public:
#endif
public:
permutation_iterator() :
m_elt_iter()
{}
explicit permutation_iterator(ElementIterator x, IndexIterator y) :
super_t(y),
m_elt_iter(x)
{}
template<
typename OtherElementIterator,
typename OtherIndexIterator,
typename = enable_if_convertible_t< OtherElementIterator, ElementIterator >,
typename = enable_if_convertible_t< OtherIndexIterator, IndexIterator >
>
permutation_iterator(permutation_iterator< OtherElementIterator, OtherIndexIterator > const& r) :
super_t(r.base()),
m_elt_iter(r.m_elt_iter)
{}
private:
typename super_t::reference dereference() const { return *(m_elt_iter + *this->base()); }
private:
ElementIterator m_elt_iter;
};
template <class ElementIterator, class IndexIterator>
inline permutation_iterator<ElementIterator, IndexIterator>
make_permutation_iterator( ElementIterator e, IndexIterator i )
template< typename ElementIterator, typename IndexIterator >
inline permutation_iterator< ElementIterator, IndexIterator > make_permutation_iterator(ElementIterator e, IndexIterator i)
{
return permutation_iterator<ElementIterator, IndexIterator>( e, i );
return permutation_iterator< ElementIterator, IndexIterator >(e, i);
}
} // namespace iterators
@ -74,4 +82,4 @@ using iterators::make_permutation_iterator;
} // namespace boost
#endif
#endif // BOOST_ITERATOR_PERMUTATION_ITERATOR_HPP_INCLUDED_