Failing to resolve multiple JSDOC @template tags

[JacobNorlin]

Bug Report

Using generics on both an ES5 class and methods results in incomplete type resolution.

🔎 Search Terms

jsdoc, template, generic

🕗 Version & Regression Information

Typescript 4.4.4, 4.5.0-beta

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about JSDoc/generics/templates

⏯ Playground Link

Playground link with relevant code

💻 Code

/**
 * @template {string} T
 * @param {T} t
 */
function Cls(t) {
    this.t = t;
}

/**
 * @template {string} V
 * @param {T} t 
 * @param {V} v 
 */
Cls.prototype.func1 = function (t, v) {
};


Cls.prototype.func2 =
    /**
     * @template {string} V
     * @param {T} t 
     * @param {V} v 
     */
    function (t, v) {
    };

var c = new Cls('a');
c.func1('a', 'b'); //Can't resolve V generic
c.func2('a', 'b'); //Can't T generic in argument

🙁 Actual behavior

Unable to resolve type for all generics defined in the JSDOC

🙂 Expected behavior

All generics should resolve to actual types.

[JacobNorlin]

A very hacky workaround to this issue is to create a dummy variable typed to the class generic and reference the class generic as this['dummy_variable'] in the method type.

/**
 * @template T
 */
function Foo(){
    /**@type {T} */
    this._hack = undefined;
}

Foo.prototype.test = 
    /**
     * @template V
     * @param {this["_hack"]} t
     * @param {V} v
     */
    function test(t, v){

    };

/**@type {Foo<{p: string}>} */
var a = new Foo();

a.test({p: '123'}, 'test');