var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
export class Pump {
    constructor(consumer, producer) {
        this.consumer = consumer;
        this.producer = producer;
    }
    start() {
        const f = (result) => __awaiter(this, void 0, void 0, function* () {
            yield this.consumer(result);
            if (result.done) {
                return Promise.resolve();
            }
            else {
                return this.producer.read().then(f);
            }
        });
        return this.producer.read().then(f);
    }
}
