cppreference.com

Namespaces

Variants

Actions

std::indirectly_copyable_storable

From cppreference.com

< cpp‎ | iterator

Compiler support

Freestanding and hosted

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

External libraries

Iterator library

Iterator concepts

indirectly_readable

(C++20)

indirectly_writable

(C++20)

weakly_incrementable

(C++20)

(C++20)

is-integer-like
is-signed-integer-like

(C++20)(C++20)

(C++20)

sized_sentinel_for

(C++20)

(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)

(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)

(C++20)

(C++20)

(C++20)

indirect_result_t

(C++20)

(C++20)

projected_value_t

(C++26)

Iterator adaptors

reverse_iterator

make_reverse_iterator

(C++14)

(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

insert_iterator

(C++20)

common_iterator

(C++20)

counted_iterator

(C++20)

basic_const_iterator

(C++23)

(C++23)

(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

(C++11)

(C++11)

ranges::advance

(C++20)

ranges::distance

(C++20)

(C++20)

(C++20)

(C++11)(C++14)

(C++14)(C++14)

(C++11)(C++14)

(C++14)(C++14)

(C++17)(C++20)

(C++17)

(C++17)

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, const std::iter_value_t <In>&> &&
std::indirectly_writable <Out, std::iter_value_t <In>&&> &&
std::indirectly_writable <Out, const std::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)

The indirectly_copyable_storable concept specifies the relationship between an indirectly_readable type and an indirectly_writable type. In addition to indirectly_copyable, this concept specifies that the copy from the indirectly_readable type can be performed via an intermediate object.

[edit] Semantic requirements

In and Out model std::indirectly_copyable_storable<In, Out> only if given a dereferenceable value i of type In:

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

[edit] Equality preservation

Expressions declared in requires expressions of the standard library concepts are required to be equality-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]

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/iterator/indirectly_copyable_storable&oldid=159903"