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import { Evt } from "../lib/index.ts";
interface Animal {    type: "CAT" | "SPIDER";    cute: boolean;    name: string;}
interface Cat extends Animal {    type: "CAT";    cute: true;}
//@ts-ignore: unusedinterface Spider extends Animal {    type: "SPIDER";    cute: false;}
const animals: Animal[] = [    { "type": "CAT", "cute": true, "name": "boubou" },    { "type": "SPIDER", "cute": false, "name": "spiderMan" },    { "type": "CAT", "cute": true, "name": "miaou" },    { "type": "SPIDER", "cute": false, "name": "aracnide" }];

let cats = animals.filter(({ type }) => type === "CAT");let spiders = animals.filter(({ type }) => type === "SPIDER");
let evtAnimal = new Evt<Animal>();
evtAnimal.attach(    animal => console.assert(spiders.shift() === animal));
const ctx= Evt.newCtx();
evtAnimal.attachExtract(    (animal: Animal): animal is Cat => animal.type === "CAT",    ctx,    cat => {
        console.assert(cats.shift() === cat);
        if (!cats.length) evtAnimal.detach(ctx);
        console.log("PASS");
    });
(function main() {
    for (let animal of animals)        evtAnimal.post(animal);

})();