ix/asynciterable/never.js

The Interactive Extensions for JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.never = exports.NeverAsyncIterable = void 0;
const tslib_1 = require("tslib");
const asynciterablex_js_1 = require("./asynciterablex.js");
const aborterror_js_1 = require("../aborterror.js");
/** @ignore */
class NeverAsyncIterable extends asynciterablex_js_1.AsyncIterableX {
    constructor() {
        super();
    }
    [Symbol.asyncIterator](signal) {
        return tslib_1.__asyncGenerator(this, arguments, function* _a() {
            (0, aborterror_js_1.throwIfAborted)(signal);
            yield tslib_1.__await(new Promise((_, reject) => {
                if (signal) {
                    signal.addEventListener('abort', () => reject(new aborterror_js_1.AbortError()), { once: true });
                }
            }));
        });
    }
}
exports.NeverAsyncIterable = NeverAsyncIterable;
/**
 * An async-iterable sequence that never returns a value.
 *
 * @returns {AsyncIterableX<never>} An async-iterable sequence that never returns a value.
 */
function never() {
    return new NeverAsyncIterable();
}
exports.never = never;

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