jsdoc in JS: arguments object does not infer types from the containing function

🔎 Search Terms

argument object infer

🕗 Version & Regression Information

I see it in next but I'm sure it's the way it's always behaved.

⏯ Playground Link

https://tsplay.dev/WyQbbW

💻 Code

/** @type {(obj: Record<PropertyKey, unknown>, property: PropertyKey, value: unknown, nonEnumerable?: boolean | null, nonWritable?: boolean | null, nonConfigurable?: boolean | null, loose?: boolean) => void} */
module.exports = function defineDataProperty(
	obj,
	property,
	value
) {
	if (!obj || (typeof obj !== 'object' && typeof obj !== 'function')) {
		throw new TypeError('`obj` must be an object or a function`');
	}
	if (typeof property !== 'string' && typeof property !== 'symbol') {
		throw new TypeError('`property` must be a string or a symbol`');
	}
	if (arguments.length > 3 && typeof arguments[3] !== 'boolean' && arguments[3] !== null) {
		throw new TypeError('`nonEnumerable`, if provided, must be a boolean or null');
	}
	if (arguments.length > 4 && typeof arguments[4] !== 'boolean' && arguments[4] !== null) {
		throw new TypeError('`nonWritable`, if provided, must be a boolean or null');
	}
	if (arguments.length > 5 && typeof arguments[5] !== 'boolean' && arguments[5] !== null) {
		throw new TypeError('`nonConfigurable`, if provided, must be a boolean or null');
	}
	if (arguments.length > 6 && typeof arguments[6] !== 'boolean') {
		throw new TypeError('`loose`, if provided, must be a boolean');
	}

	var nonEnumerable = arguments.length > 3 ? arguments[3] : null;
	var nonWritable = arguments.length > 4 ? arguments[4] : null;
	var nonConfigurable = arguments.length > 5 ? arguments[5] : null;
	var loose = arguments.length > 6 ? arguments[6] : false;
};

🙂 Expected behavior

arguments[3] (and 4, 5, and 6) should all have a type as defined in the function's type (in this case, boolean | null for the first three, and boolean for the fourth).

This should result in nonEnumerable, nonWritable, and nonConfigurable being of type boolean | null, and loose being of type boolean.

🙁 Actual behavior

Those four variables have a type of any.

Additional information about the issue

This is using jsdoc in a .js file with allowJs/checkJs enabled.

リンクされた TypeScript playground から始め、示されている JavaScript の例で arguments[3] から arguments[6] に対して推論される型を再現します。checker による JSDoc 関数型と arguments オブジェクトの処理を追跡し、その後リグレッションテストを追加します。指定どおり、これらのインデックス付き引数が any ではなく boolean | null または boolean を推論すれば完了です。