std::indirect_result_t

< cpp‎ | iterator
Defined in header <iterator>
template< class F, class... Is >

    requires (std::indirectly_readable<Is> && ...) &&
              std::invocable<F, std::iter_reference_t<Is>...>

using indirect_result_t = std::invoke_result_t<F, std::iter_reference_t<Is>...>;
 (since C++20)

The alias template indirect_result_t obtains the result type of invoking an invocable type F on the result of dereferencing indirectly_readable types Is....

Template parameters

F - an invocable type
Is - indirectly readable types that are dereferenced to arguments

See also

(C++11)(removed in C++20)(C++17)
 deduces the result type of invoking a callable object with a set of arguments
(class template)