promise_resolve: Create a resolved or rejected promise

In rstudio/promise: Abstractions for Promise-Based Asynchronous Programming

Create a resolved or rejected promise

Description

Helper functions to conveniently create a promise that is resolved to the given value (or rejected with the given reason).

Usage

promise_resolve(value)

promise_reject(reason)

Arguments

value	A value, or promise, that the new promise should be resolved to. This expression will be lazily evaluated, and if evaluating the expression raises an error, then the new promise will be rejected with that error as the reason.
reason	An error message string, or error object.

Examples

promise_resolve(mtcars) %...>%
  head() %...>%
  print()

promise_reject("Something went wrong") %...T!%
  { message(conditionMessage(.)) }

rstudio/promise documentation built on April 10, 2024, 7:02 a.m.