std::iterator

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Iterator library
Iterator Concepts Iterator primitives iterator_traits input_iterator_tag output_iterator_tag forward_iterator_tag bidirectional_iterator_tag random_access_iterator_tag iterator Iterator adaptors reverse_iterator move_iterator (C++11) back_insert_iterator front_insert_iterator insert_iterator make_move_iterator (C++11) back_inserter front_inserter inserter Stream iterators istream_iterator ostream_iterator istreambuf_iterator ostreambuf_iterator Iterator operations advance distance prev (C++11) next (C++11) Range access begin (C++11) end (C++11)

Defined in header <iterator>
template< class Category,           class T,           class Distance = std::ptrdiff_t,           class Pointer = T*,           class Reference = T&          > struct iterator;

std::iterator is the base class provided to simplify definitions of the required types for iterators.

[edit] Member types

Member type	Definition
value_type	T
difference_type	Distance
pointer	Pointer
reference	Reference
iterator_category	Category

[edit] See also

iterator_traits	provides uniform interface to the properties of an iterator (class template)
input_iterator_tag output_iterator_tag forward_iterator_tag bidirectional_iterator_tag random_access_iterator_tag	empty class types used to indicate iterator categories (class)