std::execution::just - cppreference.com (original) (raw)

Defined in header
struct just_t { /*unspecified*/ }; (1) (since C++26)
inline constexpr just_t just{}; (2) (since C++26) (customization point object)
Call signature
execution::sender auto just( auto&&... values ); (since C++26)

A sender factory that returns a sender which completes immediately by calling the receiver’s set_value().

Let ts be a pack of subexpressions. The expression just(ts...) is expression-equivalent to /*make-sender*/(just, /*product-type*/(ts...))

Customization point objects

The name execution::just denotes a customization point object, which is a const function object of a literal semiregular class type. The cv-unqualified version of its type is a tag type denoted as execution::just_t. See CustomizationPointObject for details.

[edit] Example