std::indirectly_copyable_storable

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Iterator library

Iterator concepts

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)

(C++20)

(C++20)

(C++26)

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
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istreambuf_iterator
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ranges::iter_move (C++20)
ranges::iter_swap (C++20)

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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)

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Defined in header`<iterator>`
template<class In,class Out> concept indirectly_copyable_storable= std::indirectly_copyable<In, Out>&& std::indirectly_writable<Out,std::iter_value_t<In>&>&& std::indirectly_writable<Out,conststd::iter_value_t<In>&>&& std::indirectly_writable<Out,std::iter_value_t<In>&&>&& std::indirectly_writable<Out,conststd::iter_value_t<In>&&>&& std::copyable<std::iter_value_t<In>>&& std::constructible_from<std::iter_value_t<In>,std::iter_reference_t<In>>&& std::assignable_from<std::iter_value_t<In>&,std::iter_reference_t<In>>;		(since C++20)

Theindirectly_copyable_storable concept specifies the relationship between anindirectly_readable type and anindirectly_writable type. In addition toindirectly_copyable, this concept specifies that the copy from theindirectly_readable type can be performed via an intermediate object.

[edit]Semantic requirements

In andOut modelstd::indirectly_copyable_storable<In, Out> only if given a dereferenceable valuei of typeIn:

After the definitionstd::iter_value_t<In> obj(*i);,obj is equal to the value previously denoted by*i, and
ifstd::iter_reference_t<In> is an rvalue reference type,*i is placed in a valid but unspecified state after the initialization ofobj.

[edit]Equality preservation

Expressions declared inrequires expressions of the standard library concepts are required to beequality-preserving (except where stated otherwise).

[edit]See also

indirectly_copyable (C++20)	specifies that values may be copied from an`indirectly_readable` type to an`indirectly_writable` type (concept)[edit]
indirectly_movable_storable (C++20)	specifies that values may be moved from an`indirectly_readable` type to an`indirectly_writable` type and that the move may be performed via an intermediate object (concept)[edit]

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std::indirectly_copyable_storable

[edit]Semantic requirements

[edit]Equality preservation

[edit]See also

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