| 1 | // https://github.com/nodejs/node/blob/1aab13cad9c800f4121c1d35b554b78c1b17bdbd/lib/internal/util.js
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| 2 |
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| 3 |
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| 4 | const {
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| 5 | types: { isNativeError }
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| 6 | } = require('util')
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| 7 |
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| 8 | function createDeferredPromise () {
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| 9 | let _resolve
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| 10 | let _reject
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| 11 | const promise = new Promise((resolve, reject) => {
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| 12 | _resolve = resolve
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| 13 | _reject = reject
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| 14 | })
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| 15 |
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| 16 | return { promise, resolve: _resolve, reject: _reject }
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| 17 | }
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| 18 |
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| 19 | function isError (e) {
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| 20 | // An error could be an instance of Error while not being a native error
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| 21 | // or could be from a different realm and not be instance of Error but still
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| 22 | // be a native error.
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| 23 | return isNativeError(e) || e instanceof Error
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| 24 | }
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| 25 |
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| 26 | module.exports = {
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| 27 | createDeferredPromise,
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| 28 | isError
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| 29 | }
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