std::indirectly_swappable(3)

NAME
std::indirectly_swappable - std::indirectly_swappable

Synopsis
   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 )
       { (since C++20)
           ranges::iter_swap(i1, i1);
           ranges::iter_swap(i1, i2);
           ranges::iter_swap(i2, i1);
           ranges::iter_swap(i2, i2);
       };
   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
   indirectly_readable specifies that a type is indirectly readable by applying
   (C++20) operator *
                       (concept)
   iter_swap swaps the values referenced by two dereferenceable objects
   (C++20) (customization point object)