JSDoc "nameless" @typedef on declaration does not work inside its own module

[ikabirov]

index.js

import {MyType} from "./MyType";

/**
 * @param {MyType} article
 */
function test(article) {
	article.custom; // error TS2339: Property 'custom' does not exist on type '{ src: string; }'.
}

MyType.js

/**
 * @typedef {{src: string}}
 */
let MyType;

/**
 * @param {MyType} article
 */
function test(article) {
	article.custom; // unknown type, no error
}

export {
	MyType,
}

[KeithHenry]

Shouldn't it be (in MyType.js):

/**
 * @typedef {Object} MyType
 * @property {string} src
 */

/**
 * @param {MyType} article
 */
function test(article) {
	article.custom; // unknown type, no error
}

export {
	MyType,
}

[ikabirov]

No, it does not supported by Closure Compiler

Hm...

/** @typedef {{src: string}} */
let T;

/** @type {T} */
let x = JSON.parse("whatever");
x.brc; // No error?

export { T };

x is any despite having a type annotation -- but it works if the export is removed.

[jameskeane]

just a heads up, @sandersn I've already started working on this, I'll have a patch tomorrow probably.