Docs4dev
Docs
cpp / latest / iterator / indirectly_comparable.html

std::indirectly_comparable

Defined in header <iterator> 
template< class I1, class I2, class Comp,
          class Proj1 = std::identity, class Proj2 = std::identity >
concept indirectly_comparable =
    std::indirect_binary_predicate<Comp, std::projected<I1, Proj1>, std::projected<I2, Proj2>>;
 (since C++20)

The concept indirectly_comparable specifies the fundamental algorithm requirement for comparing values across two independent ranges.

Semantic requirements

indirectly_comparable is modeled only if all concepts it subsumes are modeled.

See also

(C++20)
specifies that a callable type, when invoked with the result of dereferencing two indirectly_readable types, satisfies predicate
(concept)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/iterator/indirectly_comparable