awaitNext {async}

R Documentation

Wait for the next value from a channel or stream.

Description

awaitNext can be used within an async or stream coroutine. When reached, awaitNext will register to receive the next element from an async or a coroutine object.

Usage

awaitNext(strm, or, err)

Arguments

strm	A channel or stream object.
or	This argument will be evaluated and returned in the case the channel closes. If not specified, awaiting on a closed stream will raise an error with message "StopIteration".
err	A function to be called if the channel throws an error condition.

Value

In the context of an async or stream, awaitNext(x) returns the resolved value of a promise x, or stops with an error.

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