45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
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export const CallableInstance =
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/**
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* @type {new <Parameters extends Array<unknown>, Result>(property: string | symbol) => (...parameters: Parameters) => Result}
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*/
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(
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/** @type {unknown} */
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(
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/**
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* @this {Function}
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* @param {string | symbol} property
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* @returns {(...parameters: Array<unknown>) => unknown}
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*/
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function (property) {
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const self = this
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const constr = self.constructor
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const proto = /** @type {Record<string | symbol, Function>} */ (
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// Prototypes do exist.
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// type-coverage:ignore-next-line
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constr.prototype
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)
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const value = proto[property]
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/** @type {(...parameters: Array<unknown>) => unknown} */
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const apply = function () {
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return value.apply(apply, arguments)
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}
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Object.setPrototypeOf(apply, proto)
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// Not needed for us in `unified`: we only call this on the `copy`
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// function,
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// and we don't need to add its fields (`length`, `name`)
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// over.
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// See also: GH-246.
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// const names = Object.getOwnPropertyNames(value)
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//
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// for (const p of names) {
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// const descriptor = Object.getOwnPropertyDescriptor(value, p)
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// if (descriptor) Object.defineProperty(apply, p, descriptor)
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// }
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return apply
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}
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)
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)
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