std::experimental::ranges:: IndirectlySwappable

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C++
Experimental
Ranges
Iterators library
Iterator concepts
Indirect callable concepts
Common algorithm requirements
IndirectlySwappable

Concept utilities
Iterator utilities and operations
Iterator traits
Iterator adaptors
Stream iterators
template < class I1, class I2 = I1 >

concept bool IndirectlySwappable =
Readable < I1 > && Readable < I2 > &&
requires ( I1 && i1, I2 && i2 ) {
ranges:: iter_swap ( std:: forward < I1 > ( i1 ) , std:: forward < I2 > ( i2 ) ) ;
ranges:: iter_swap ( std:: forward < I2 > ( i2 ) , std:: forward < I1 > ( i1 ) ) ;
ranges:: iter_swap ( std:: forward < I1 > ( i1 ) , std:: forward < I1 > ( i1 ) ) ;
ranges:: iter_swap ( std:: forward < I2 > ( i2 ) , std:: forward < I2 > ( i2 ) ) ;

} ;
(ranges TS)
This section is incomplete
Reason: add description and extra caveats
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