std::indirectly_swappable

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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)
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forward_iterator (C++20)
bidirectional_iterator (C++20)
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contiguous_iterator (C++20)

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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
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ranges::iter_move (C++20)
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ranges::advance (C++20)
ranges::distance (C++20)
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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 I1,class I2= I1> concept indirectly_swappable= std::indirectly_readable<I1>&& std::indirectly_readable<I2>&& requires(const I1 i1,const I2 i2) { ranges::iter_swap(i1, i1); ranges::iter_swap(i1, i2); ranges::iter_swap(i2, i1); ranges::iter_swap(i2, i2); };		(since C++20)

The conceptindirectly_swappable specifies a relationship between two types respectively modellingstd::indirectly_readable, where their referenced types can be swapped.

[edit]Semantic requirements

I1 andI2 modelindirectly_swappable only if all concepts it subsumes are modeled.

[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_readable (C++20)	specifies that a type is indirectly readable by applying operator`*` (concept)[edit]
iter_swap (C++20)	swaps the values referenced by two dereferenceable objects (customization point object)[edit]

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std::indirectly_swappable

[edit]Semantic requirements

[edit]Equality preservation

[edit]See also

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