lsst::sphgeom::RangeSet::Iterator Struct Reference

#include <RangeSet.h>

Public Types
using	difference_type = ptrdiff_t
using	value_type = std::tuple<std::uint64_t, std::uint64_t>
using	pointer = void
using	reference = std::tuple<std::uint64_t, std::uint64_t>
using	iterator_category = std::input_iterator_tag

Public Member Functions
	Iterator (std::uint64_t const *ptr)
Iterator &	operator++ ()
Iterator &	operator-- ()
Iterator	operator++ (int)
Iterator	operator-- (int)
Iterator	operator+ (ptrdiff_t n) const
Iterator	operator- (ptrdiff_t n) const
Iterator &	operator+= (ptrdiff_t n)
Iterator &	operator-= (ptrdiff_t n)
ptrdiff_t	operator- (Iterator const &i) const
bool	operator== (Iterator const &i) const
bool	operator!= (Iterator const &i) const
bool	operator< (Iterator const &i) const
bool	operator> (Iterator const &i) const
bool	operator<= (Iterator const &i) const
bool	operator>= (Iterator const &i) const
std::tuple< std::uint64_t, std::uint64_t >	operator* ()
std::tuple< std::uint64_t, std::uint64_t >	operator[] (ptrdiff_t n) const

Public Attributes
std::uint64_t const *	p = nullptr

Friends
void	swap (Iterator &a, Iterator &b)
Iterator	operator+ (ptrdiff_t n, Iterator const &i)

Detailed Description

A constant iterator over the ranges (represented as 2-tuples) in a RangeSet.

RangeSet does not store an array of 2-tuples internally. But, §24.2.5 of the C++11 standard requires the following from constant forward iterators:

• (1.3) The reference type of the iterator must be a reference to const value_type
• (6) If a and b are both dereferenceable, then a == b if and only if *a and *b are bound to the same object.

So, dereferencing a forward iterator cannot return by value, or return a reference to a member of the iterator itself. As a result, it seems impossible to provide more than an input iterator for container objects that do not store their values directly.

While this class only claims to be an input iterator, it nevertheless implements most random access iterator requirements. Dereferencing an iterator returns a tuple by value, and operator-> is omitted.

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

• include/lsst/sphgeom/RangeSet.h