dashron / roads-coroutine

A simple library to turn javascript generators into promise-returning functions

Async and Await are in stable versions of node! Use that instead!

roads-coroutine

A simple library to turn javascript generators into promise-returning functions.

Examples

var cr = require('roads-coroutine');

var fn = cr(function* (param) {
  var result = yield promiseReturningAsyncFunction(param);
  return "final result: " + result;
});

fn('hey!').then(function (response) {
  console.log(response);
}, function (err) {
  console.log(response);
});

The tests have even more examples!

Warning

There are versions of iojs pre-2.5.0 that can generate false "unhandled rejection" events. Please make sure you are using at least 2.5.0

roads-coroutine's Issues

False unhandled rejection

Creating issue for future reference. In certain versions of iojs the following code throws an unhandled rejection error

"use strict";

process.on('unhandledRejection', function(reason, p) {
    console.log("\nUnhandled Rejection at:\n Promise ", p, "\n reason: ", reason);
    throw reason;
});

var coroutine = require('./index.js');

var first = coroutine(function* () {
    yield new Promise(function (resolve, reject) {
        resolve(null);
    });

    return new Promise(function (resolve, reject) {
        reject(new Error('Unauthorized'));
    });
});

first()
.then(function (response) {
    console.log('resp', response);
}, function (err) {
    console.log('err', err);
});