lazzy.ts/generators/spread.js

Fast and lightweight library for lazy operations with iterable objects.

"use strict";
var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
    if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
    var g = generator.apply(thisArg, _arguments || []), i, q = [];
    return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
    function fulfill(value) { resume("next", value); }
    function reject(value) { resume("throw", value); }
    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.spreadAsync = exports.spread = void 0;
const helpers_1 = require("../common/helpers");
function* spread(iterator) {
    let x = iterator.next();
    while (x.done !== true) {
        if (helpers_1.isIterable(x.value) && (typeof x.value !== "string" || x.value.length > 1)) {
            const iter = x.value[Symbol.iterator]();
            for (const element of iter) {
                yield element;
            }
        }
        else {
            yield x.value;
        }
        x = iterator.next();
    }
    return x.value;
}
exports.spread = spread;
function spreadAsync(iterator) {
    return __asyncGenerator(this, arguments, function* spreadAsync_1() {
        let x = yield __await(iterator.next());
        while (x.done !== true) {
            if (helpers_1.isIterable(x.value) && (typeof x.value !== "string" || x.value.length > 1)) {
                const iter = x.value[Symbol.iterator]();
                for (const element of iter) {
                    yield yield __await(element);
                }
            }
            else {
                yield yield __await(x.value);
            }
            x = yield __await(iterator.next());
        }
        return yield __await(x.value);
    });
}
exports.spreadAsync = spreadAsync;
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