index.js•861 B
'use strict'
exports.fromCallback = function (fn) {
return Object.defineProperty(function () {
if (typeof arguments[arguments.length - 1] === 'function') fn.apply(this, arguments)
else {
return new Promise((resolve, reject) => {
arguments[arguments.length] = (err, res) => {
if (err) return reject(err)
resolve(res)
}
arguments.length++
fn.apply(this, arguments)
})
}
}, 'name', { value: fn.name })
}
exports.fromPromise = function (fn) {
return Object.defineProperty(function () {
const cb = arguments[arguments.length - 1]
if (typeof cb !== 'function') return fn.apply(this, arguments)
else {
delete arguments[arguments.length - 1]
arguments.length--
fn.apply(this, arguments).then(r => cb(null, r), cb)
}
}, 'name', { value: fn.name })
}