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std::indirect_result_t

From cppreference.com
< cpp‎ | iterator
 
 
Iterator library
Iterator concepts
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Algorithm concepts and utilities
Indirect callable concepts
Common algorithm requirements
Utilities
indirect_result_t
Iterator adaptors
Stream iterators
Iterator customization points
Iterator operations
(C++11)
(C++11)
Range access
(C++11)(C++14)
(C++11)(C++14)
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(C++17)
(C++17)
 
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....

[edit] Template parameters

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

[edit] 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) [edit]