79 lines
No EOL
1.6 KiB
JavaScript
79 lines
No EOL
1.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.maybeAsync = maybeAsync;
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exports.forwardAsync = forwardAsync;
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exports.isThenable = isThenable;
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exports.waitFor = exports.onFirstPause = exports.isAsync = void 0;
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const gensync = require("gensync");
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const id = x => x;
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const runGenerator = gensync(function* (item) {
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return yield* item;
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});
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const isAsync = gensync({
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sync: () => false,
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errback: cb => cb(null, true)
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});
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exports.isAsync = isAsync;
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function maybeAsync(fn, message) {
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return gensync({
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sync(...args) {
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const result = fn.apply(this, args);
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if (isThenable(result)) throw new Error(message);
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return result;
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},
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async(...args) {
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return Promise.resolve(fn.apply(this, args));
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}
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});
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}
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const withKind = gensync({
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sync: cb => cb("sync"),
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async: cb => cb("async")
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});
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function forwardAsync(action, cb) {
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const g = gensync(action);
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return withKind(kind => {
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const adapted = g[kind];
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return cb(adapted);
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});
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}
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const onFirstPause = gensync({
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name: "onFirstPause",
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arity: 2,
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sync: function (item) {
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return runGenerator.sync(item);
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},
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errback: function (item, firstPause, cb) {
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let completed = false;
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runGenerator.errback(item, (err, value) => {
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completed = true;
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cb(err, value);
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});
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if (!completed) {
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firstPause();
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}
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}
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});
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exports.onFirstPause = onFirstPause;
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const waitFor = gensync({
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sync: id,
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async: id
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});
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exports.waitFor = waitFor;
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function isThenable(val) {
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return !!val && (typeof val === "object" || typeof val === "function") && !!val.then && typeof val.then === "function";
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} |