alinea/dist/cli/util/Emitter.js

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import "../../chunks/chunk-U5RRZUYZ.js";

// src/cli/util/Emitter.ts
var Emitter;
((Emitter2) => {
  Emitter2.CANCELLED = "EMIT_CANCELLED";
})(Emitter || (Emitter = {}));
function createEmitter() {
  const queue = [];
  let resolve;
  const push = (p) => {
    queue.push(p);
    if (resolve) {
      resolve();
      resolve = void 0;
    }
  };
  const iterator = {
    async next() {
      while (!queue.length) {
        await new Promise((_) => resolve = _);
      }
      const current = queue.pop();
      switch (current.type) {
        case "emit":
          return { value: current.value, done: false };
        case "error":
          throw current.value;
        case "finish":
          return { value: void 0, done: true };
      }
    }
  };
  return {
    emit: (value) => push({ type: "emit", value }),
    throw(e) {
      push({ type: "error", value: e });
    },
    cancel() {
      this.throw(Emitter.CANCELLED);
    },
    return() {
      queue.push({ type: "finish" });
    },
    [Symbol.asyncIterator]() {
      return iterator;
    }
  };
}
export {
  Emitter,
  createEmitter
};