iteragain/dist/es5/internal/FlatMapIterator.js

Javascript Iterable/Iterator/Generator-function utilities.

import toIterator from '../toIterator';
import isIterable from '../isIterable';
import isIterator from '../isIterator';
/** Maps and flattens an iterator by a depth of 1. */
var FlatMapIterator = /** @class */ (function () {
    function FlatMapIterator(iterator, iteratee) {
        this.iterator = iterator;
        this.iteratee = iteratee;
        this.inner = null;
    }
    FlatMapIterator.prototype[Symbol.iterator] = function () {
        return this;
    };
    FlatMapIterator.prototype.next = function () {
        var _a, _b;
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        if (this.inner) {
            var next_1 = (_a = this.inner).next.apply(_a, args);
            if (next_1.done) {
                this.inner = null;
                return this.next.apply(this, args);
            }
            return next_1;
        }
        var next = (_b = this.iterator).next.apply(_b, args);
        if (next.done)
            return next;
        var value = this.iteratee(next.value);
        if (typeof value !== 'string') {
            if (isIterator(value)) {
                this.inner = value;
                return this.next.apply(this, args);
            }
            else if (isIterable(value)) {
                this.inner = toIterator(value);
                return this.next.apply(this, args);
            }
        }
        return { value: value, done: false };
    };
    return FlatMapIterator;
}());
export { FlatMapIterator };
export default FlatMapIterator;
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