ComponentDefinition type

[buschtoens]

Currently, there is no clean way to type check for a ComponentDefinition, e.g.:

{{validated-component someComponent=(component "some-component')}}

The (component) helper returns a CurlyComponentDefintion, which is a subclass of ComponentDefintion of the @glimmer/rutime package.

Ideally, I would like this API:

import Component from '@ember/component';
import { argument } from '@ember-decorators/argument';
import { type } from '@ember-decorators/argument/type';
import { ComponentDefinition } from '@ember-decorators/argument/types';

export default class ValidatedComponent extends Component {
  @argument
  @type(ComponentDefinition)
  someComponent;
}

However, I don't see an easy way to access the ComponentDefinition interface / class from the Ember world.

[pzuraq]

Definitely think this is something we should provide out of the box, also unsure of how we can do it (also, backwards compatibility. This may only be something we can guarantee in the Glimmer 2+ world if we can get ahold of that class)

[alexlafroscia]

Based on the validator refactor that I did in #90, I prototyped an implementation for this. While it doesn't do the "right thing" and actually receive the class from Glimmer to compare again, it does work!

You can check out the commit above to see what I did; I'm going to hold off on making a pull request for it until #90 has been addressed.

One thing I also played with was going further and allowing you to validate more specific things about the component -- for example, what it is an instance of, or what arguments it expects! I think this is totally doable, I just need to come up with an API for describing those things that feels right.