How about this:
```js
// the poly
if (!Symbol.callable)
Symbol.callable = Symbol('callable');
// the setup
class Callable extends Function {
constructor(object) {
super('return arguments.callee[Symbol.callable](...arguments)');
// sloppy mode FTW!
Object.setPrototypeOf(this, object);
}
}
// the example
const obj = new Callable({
[Symbol.callable](value) {
return value + this.value;
},
value: 123
});
obj(7); // 130
```
On Wed, Dec 5, 2018 at 12:02 AM Sultan <[email protected]> wrote:
> Something along the lines of Symbol.iterator protocol for defining
> callback objects i.e: Symbol.callable:
>
> const obj = {
> [Symbol.callable]: function (...args) { return
> this[Symbol.for('value')] },
> [Symbol.for(''value')]: 'value',
> }
>
> assert(obj() === 'value')
> _______________________________________________
> es-discuss mailing list
> [email protected]
> https://mail.mozilla.org/listinfo/es-discuss
>
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
