step_iterator_adaptor< Derived, Iterator, SFn > Class Template Reference

An adaptor over an existing iterator that changes the step unit. More...

#include <step_iterator.hpp>

Inheritance diagram for step_iterator_adaptor< Derived, Iterator, SFn >:

Public Types
using	parent_t
using	base_difference_type = typename std::iterator_traits<Iterator>::difference_type
using	difference_type = typename SFn::difference_type
using	reference = typename std::iterator_traits<Iterator>::reference
using	iterator_category = typename parent_t::iterator_concept

Public Member Functions
	step_iterator_adaptor (Iterator const &it, SFn step_fn=SFn())
auto	step () const -> difference_type
constexpr Derived &	operator+= (base_difference_type d)
constexpr auto	base () noexcept
constexpr auto	base () const noexcept

Protected Member Functions
constexpr auto	base_reference () noexcept -> Iterator &
constexpr auto	base_reference () const noexcept -> Iterator const &

Protected Attributes
Iterator	it_
SFn	_step_fn

Friends
constexpr auto	operator- (Derived const &lhs, Derived const &rhs) noexcept -> difference_type

Detailed Description

template<typename Derived, typename Iterator, typename SFn>
class boost::gil::detail::step_iterator_adaptor< Derived, Iterator, SFn >

An adaptor over an existing iterator that changes the step unit.

(i.e. distance(it,it+1)) by a given predicate. Instead of calling base's operators ++, –, +=, -=, etc. the adaptor is using the passed policy object SFn for advancing and for computing the distance between iterators.

Member Typedef Documentation

parent_t

template<typename Derived, typename Iterator, typename SFn>

using parent_t

Initial value:

 stl_interfaces::iterator_interface<
 
        Derived,
 
        std::random_access_iterator_tag,
        typename std::iterator_traits<Iterator>::value_type,
        typename std::iterator_traits<Iterator>::reference,
        typename std::iterator_traits<Iterator>::pointer,
        typename SFn::difference_type>

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The documentation for this class was generated from the following file:

• step_iterator.hpp