iter_move(std::move_iterator)

 

C++

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Iterator library

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

 

std::move_iterator

Member functions

move_iterator::move_iterator

move_iterator::operator=

move_iterator::base

move_iterator::operator*move_iterator::operator->

move_iterator::operator[]

move_iterator::operator++move_iterator::operator+move_iterator::operator+=move_iterator::operator--move_iterator::operator-move_iterator::operator-=

Non-member functions

operator==operator!=operator<operator<=operator>operator>=operator<=> (until C++20)(C++20)

operator==(move_sentinel) (C++20)

operator+

operator-

operator-(move_sentinel) (C++20)

iter_move (C++20)

iter_swap (C++20)

make_move_iterator (C++11)

 

friendconstexprstd::iter_rvalue_reference_t<Iter>     iter_move(conststd::move_iterator& i )noexcept(/* see below */);		(since C++20)

Casts the result of dereferencing the underlying iterator to its associated rvalue reference type.

Equivalent to return std::ranges::iter_move(i.base());.

This function template is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::move_iterator<Iter> is an associated class of the arguments.

Parameters

i

-

a source move iterator

Return value

An rvalue reference or a prvalue temporary.

Complexity

Constant.

Exceptions

noexcept specification:  

noexcept(noexcept(ranges::iter_move(i.base())))

Example

Run this code

#include <iomanip>#include <iostream>#include <iterator>#include <string>#include <vector>   void print(constauto& rem, constauto& v){std::cout<< rem <<'['<< size(v)<<"] { ";for(char comma[]{0, ' ', 0};constauto& s : v)std::cout<< comma <<std::quoted(s), comma[0]=',';std::cout<<" }\n";}   int main(){std::vector<std::string> p{"Andromeda", "Cassiopeia", "Phoenix"}, q;   print("p", p), print("q", q);   using MI =std::move_iterator<std::vector<std::string>::iterator>;   for(MI first{p.begin()}, last{p.end()}; first != last;++first) q.emplace_back(/* ADL */ iter_move(first));   print("p", p), print("q", q);}

Possible output:

p[3] { "Andromeda", "Cassiopeia", "Phoenix" } q[0] { } p[3] { "", "", "" } q[3] { "Andromeda", "Cassiopeia", "Phoenix" }

See also

iter_move (C++20)	casts the result of dereferencing an object to its associated rvalue reference type (customization point object)
iter_move (C++20)	casts the result of dereferencing the adjusted underlying iterator to its associated rvalue reference type (function)
move (C++11)	converts the argument to an xvalue (function template)
move_if_noexcept (C++11)	converts the argument to an xvalue if the move constructor does not throw (function template)
forward (C++11)	forwards a function argument and use the type template argument to preserve its value category (function template)
ranges::move (C++20)	moves a range of elements to a new location (algorithm function object)
ranges::move_backward (C++20)	moves a range of elements to a new location in backwards order (algorithm function object)