[uninitialized.move]

# 26 Algorithms library [[algorithms]](./#algorithms)

## 26.11 Specialized <memory> algorithms [[specialized.algorithms]](specialized.algorithms#uninitialized.move)

### 26.11.6 uninitialized_move [uninitialized.move]

[🔗](#lib:uninitialized_move)

`template<class InputIterator, class NoThrowForwardIterator>
  constexpr NoThrowForwardIterator uninitialized_move(InputIterator first, InputIterator last,
                                                      NoThrowForwardIterator result);
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L13990)

*Preconditions*: result+[0, (last - first)) does not overlap with [first, last)[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L13994)

*Effects*: Equivalent to:for (; first != last; (void)++result, ++first)::new (*voidify*(*result))typename iterator_traits<NoThrowForwardIterator>::value_type(*deref-move*(first));return result;

[🔗](#lib:uninitialized_move_)

`namespace ranges {
  template<[input_iterator](iterator.concept.input#concept:input_iterator "24.3.4.9 Concept input_­iterator [iterator.concept.input]") I, [sentinel_for](iterator.concept.sentinel#concept:sentinel_for "24.3.4.7 Concept sentinel_­for [iterator.concept.sentinel]")<I> S1,
           [nothrow-forward-iterator](special.mem.concepts#concept:nothrow-forward-iterator "26.11.2 Special memory concepts [special.mem.concepts]") O, [nothrow-sentinel-for](special.mem.concepts#concept:nothrow-sentinel-for "26.11.2 Special memory concepts [special.mem.concepts]")<O> S2>
    requires [constructible_from](concept.constructible#concept:constructible_from "18.4.11 Concept constructible_­from [concept.constructible]")<iter_value_t<O>, iter_rvalue_reference_t<I>>
    constexpr uninitialized_move_result<I, O>
      uninitialized_move(I ifirst, S1 ilast, O ofirst, S2 olast);
  template<[input_range](range.refinements#concept:input_range "25.4.6 Other range refinements [range.refinements]") IR, [nothrow-forward-range](special.mem.concepts#concept:nothrow-forward-range "26.11.2 Special memory concepts [special.mem.concepts]") OR>
    requires [constructible_from](concept.constructible#concept:constructible_from "18.4.11 Concept constructible_­from [concept.constructible]")<range_value_t<OR>, range_rvalue_reference_t<IR>>
    constexpr uninitialized_move_result<borrowed_iterator_t<IR>, borrowed_iterator_t<OR>>
      uninitialized_move(IR&& in_range, OR&& out_range);
}
`

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14021)

*Preconditions*: [ofirst, olast) does not overlap with [ifirst, ilast)[.](#3.sentence-1)

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14025)

*Effects*: Equivalent to:for (; ifirst != ilast && ofirst != olast; ++ofirst, (void)++ifirst)::new (*voidify*(*ofirst)) remove_reference_t<iter_reference_t<O>>(ranges::iter_move(ifirst));return {std::move(ifirst), ofirst};

[5](#5)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14035)

[*Note [1](#note-1)*:

If an exception is thrown, some objects in the range [ifirst, ilast) are
left in a valid, but unspecified state[.](#5.sentence-1)

— *end note*]

[🔗](#lib:uninitialized_move_n)

`template<class InputIterator, class Size, class NoThrowForwardIterator>
  constexpr pair<InputIterator, NoThrowForwardIterator>
    uninitialized_move_n(InputIterator first, Size n, NoThrowForwardIterator result);
`

[6](#6)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14050)

*Preconditions*: result+[0, n) does not overlap with first+[0, n)[.](#6.sentence-1)

[7](#7)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14054)

*Effects*: Equivalent to:for (; n > 0; ++result, (void)++first, --n)::new (*voidify*(*result))typename iterator_traits<NoThrowForwardIterator>::value_type(*deref-move*(first));return {first, result};

[🔗](#lib:uninitialized_move_n_)

`namespace ranges {
  template<[input_iterator](iterator.concept.input#concept:input_iterator "24.3.4.9 Concept input_­iterator [iterator.concept.input]") I, [nothrow-forward-iterator](special.mem.concepts#concept:nothrow-forward-iterator "26.11.2 Special memory concepts [special.mem.concepts]") O, [nothrow-sentinel-for](special.mem.concepts#concept:nothrow-sentinel-for "26.11.2 Special memory concepts [special.mem.concepts]")<O> S>
    requires [constructible_from](concept.constructible#concept:constructible_from "18.4.11 Concept constructible_­from [concept.constructible]")<iter_value_t<O>, iter_rvalue_reference_t<I>>
    constexpr uninitialized_move_n_result<I, O>
      uninitialized_move_n(I ifirst, iter_difference_t<I> n, O ofirst, S olast);
}
`

[8](#8)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14076)

*Preconditions*: [ofirst, olast) does not overlap with ifirst+[0, n)[.](#8.sentence-1)

[9](#9)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14080)

*Effects*: Equivalent to:auto t = uninitialized_move(counted_iterator(std::move(ifirst), n),
 default_sentinel, ofirst, olast);return {std::move(t.in).base(), t.out};

[10](#10)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L14089)

[*Note [2](#note-2)*:

If an exception is thrown, some objects in the rangeifirst+[0, n) are left in a valid but unspecified state[.](#10.sentence-1)

— *end note*]