exports.fromCallback = function (fn) { | |
return Object.defineProperty(function (...args) { | |
if (typeof args[args.length - 1] === 'function') fn.apply(this, args) | |
else { | |
return new Promise((resolve, reject) => { | |
args.push((err, res) => (err != null) ? reject(err) : resolve(res)) | |
fn.apply(this, args) | |
}) | |
} | |
}, 'name', { value: fn.name }) | |
} | |
exports.fromPromise = function (fn) { | |
return Object.defineProperty(function (...args) { | |
const cb = args[args.length - 1] | |
if (typeof cb !== 'function') return fn.apply(this, args) | |
else { | |
args.pop() | |
fn.apply(this, args).then(r => cb(null, r), cb) | |
} | |
}, 'name', { value: fn.name }) | |
} | |