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2b59209cf3
* Warn when pg.Pool() isn’t called as a constructor in preparation for #1541. `eval` is a bit awkward, but it’s more accurate than an `instanceof` check and will work on platforms new enough to support pg 8 (i.e. only not Node 4). * Warn when Query() isn’t called as a constructor
23 lines
537 B
JavaScript
23 lines
537 B
JavaScript
'use strict'
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const warnDeprecation = require('./warn-deprecation')
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// Node 4 doesn’t support new.target.
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let hasNewTarget
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try {
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// eslint-disable-next-line no-eval
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eval('(function () { new.target })')
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hasNewTarget = true
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} catch (error) {
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hasNewTarget = false
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}
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const checkConstructor = (name, code, getNewTarget) => {
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if (hasNewTarget && getNewTarget() === undefined) {
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warnDeprecation(`Constructing a ${name} without new is deprecated and will stop working in pg 8.`, code)
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}
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}
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module.exports = checkConstructor
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