NAME¶

std::execution::then - std::execution::then

Synopsis¶

Defined in header <execution>
execution::sender auto then(

execution::sender auto input, (since C++26)
std::invocable<values-sent-by(input)...> function

);

Parameters¶

input - sender which once executed sends the values upon which the function
executes
function - invocable to be called by the new sender chained to the input sender

Return value¶

Returns a sender describing the task graph described by the input sender, with an
added node of invoking the provided function with the values sent by the input
sender as arguments.

then is guaranteed to not begin executing function until the returned sender is
started.

Example¶

Possible usage of execution::then.

execution::sender auto input = get_input();
execution::sender auto snd = execution::then(input, [](auto... args)
{
std::print(args...);
});
// snd describes the work described by pred
// followed by printing all of the values sent by pred