std::indirectly_swappable

< cpp‎ | iterator
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 concept indirectly_swappable specifies a relationship between two types respectively modelling std::indirectly_readable, where their referenced types can be swapped.

Semantic requirements

I1 and I2 model indirectly_swappable only if all concepts it subsumes are modeled.

Equality preservation

Expressions declared in requires-expressions of the standard library concepts are required to be equality-preserving (except where stated otherwise).

See also

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