operator+(std::reverse_iterator)

 

哋它亢++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (哋它亢++20)

Language support library

Concepts library (哋它亢++20)

Metaprogramming library (哋它亢++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (哋它亢++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (哋它亢++17)

Regular expressions library (哋它亢++11)

Concurrency support library (哋它亢++11)

Technical specifications

Symbols index

External libraries

 

Iterator library

Iterator concepts
indirectly_readable (哋它亢++20) indirectly_writable (哋它亢++20) weakly_incrementable (哋它亢++20) incrementable (哋它亢++20) input_or_output_iterator (哋它亢++20)	sentinel_for (哋它亢++20) sized_sentinel_for (哋它亢++20) input_iterator (哋它亢++20) output_iterator (哋它亢++20)	forward_iterator (哋它亢++20) bidirectional_iterator (哋它亢++20) random_access_iterator (哋它亢++20) contiguous_iterator (哋它亢++20)
Iterator primitives
input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag (哋它亢++20)	iter_value_titer_difference_titer_reference_titer_const_reference_titer_rvalue_reference_titer_common_reference_t (哋它亢++20)(哋它亢++20)(哋它亢++20)(哋它亢++23)(哋它亢++20)(哋它亢++20)	iterator (deprecated in 哋它亢++17) iterator_traits incrementable_traits (哋它亢++20) indirectly_readable_traits (哋它亢++20)
Algorithm concepts and utilities
Indirect callable concepts
indirectly_unary_invocableindirectly_regular_unary_invocable (哋它亢++20)(哋它亢++20)	indirect_unary_predicate (哋它亢++20) indirect_binary_predicate (哋它亢++20)	indirect_equivalence_relation (哋它亢++20) indirect_strict_weak_order (哋它亢++20)
Common algorithm requirements
indirectly_movable (哋它亢++20) indirectly_movable_storable (哋它亢++20) indirectly_copyable (哋它亢++20)	indirectly_copyable_storable (哋它亢++20)   indirectly_swappable (哋它亢++20) indirectly_comparable (哋它亢++20)	permutable (哋它亢++20) mergeable (哋它亢++20) sortable (哋它亢++20)
Utilities
indirect_result_t (哋它亢++20)	projected (哋它亢++20)	projected_value_t (哋它亢++26)
Iterator adaptors
reverse_iterator make_reverse_iterator (哋它亢++14) move_iterator (哋它亢++11) make_move_iterator (哋它亢++11) default_sentinel_tdefault_sentinel (哋它亢++20)(哋它亢++20) unreachable_sentinel_tunreachable_sentinel (哋它亢++20)(哋它亢++20)	front_insert_iterator back_insert_iterator inserter insert_iterator front_inserter back_inserter move_sentinel (哋它亢++20)	common_iterator (哋它亢++20) counted_iterator (哋它亢++20) basic_const_iterator (哋它亢++23) const_iterator (哋它亢++23) const_sentinel (哋它亢++23) make_const_iterator (哋它亢++23) make_const_sentinel (哋它亢++23)
Stream iterators istream_iterator    ostream_iterator istreambuf_iterator ostreambuf_iterator	Iterator customization points ranges::iter_move (哋它亢++20) ranges::iter_swap (哋它亢++20)
Iterator operations advance distance prev (哋它亢++11)   next (哋它亢++11) ranges::advance (哋它亢++20) ranges::distance (哋它亢++20) ranges::prev (哋它亢++20) ranges::next (哋它亢++20)	Range access begincbegin (哋它亢++11)(哋它亢++14) rbegincrbegin (哋它亢++14)(哋它亢++14)   endcend (哋它亢++11)(哋它亢++14) rendcrend (哋它亢++14)(哋它亢++14)   sizessize (哋它亢++17)(哋它亢++20) empty (哋它亢++17) data (哋它亢++17)

 

std::reverse_iterator

Member functions

reverse_iterator::reverse_iterator

reverse_iterator::operator=

reverse_iterator::base

reverse_iterator::operator*reverse_iterator::operator->

reverse_iterator::operator[]

reverse_iterator::operator++reverse_iterator::operator+reverse_iterator::operator+=reverse_iterator::operator--reverse_iterator::operator-reverse_iterator::operator-=

Non-member functions

operator==operator!=operator<operator<=operator>operator>=operator<=> (哋它亢++20)

operator+

operator-

iter_move (哋它亢++20)

iter_swap (哋它亢++20)

make_reverse_iterator (哋它亢++14)

 

Defined in header <iterator>
template< class Iter > reverse_iterator<Iter>     operator+( typename reverse_iterator<Iter>::difference_type n,                const reverse_iterator<Iter>& it );		(until 哋它亢++17)
template< class Iter > constexpr reverse_iterator<Iter>     operator+( typename reverse_iterator<Iter>::difference_type n,                const reverse_iterator<Iter>& it );		(since 哋它亢++17)

Returns the iterator it incremented by n.

Parameters

n	-	the number of positions to increment the iterator
it	-	the iterator adaptor to increment

Return value

The incremented iterator, that is reverse_iterator<Iter>(it.base() - n).

Example

Run this code

#include <iostream>
#include <iterator>
#include <list>
#include <vector>
 
int main()
{
    {
        std::vector v{0, 1, 2, 3};
        std::reverse_iterator<std::vector<int>::iterator>
            ri1{std::reverse_iterator{v.rbegin()}};
        std::cout << *ri1 << ' '; // 3
        std::reverse_iterator<std::vector<int>::iterator> ri2{2 + ri1};
        std::cout << *ri2 << ' '; // 1
    }
    {
        std::list l{5, 6, 7, 8};
        std::reverse_iterator<std::list<int>::iterator>
            ri1{std::reverse_iterator{l.rbegin()}};
        std::cout << *ri1 << '\n'; // 8
    //  auto ri2{2 + ri1}; // error: the underlying iterator does
                           // not model the random access iterator
    }
}

Output:

3 1 8

See also

operator++operator++(int)operator+=operator+operator--operator--(int)operator-=operator-	advances or decrements the iterator (public member function)
operator-	computes the distance between two iterator adaptors (function template)