iteragain/dist/es5/internal/FunctionIterator.js

Javascript Iterable/Iterator/Generator-function utilities.

/**
 * Creates a iterator from any function. `func` will be called once per `next()` call and will stop once the value of
 * `sentinel` (default: undefined) is returned from `func`. Behaves similarly to a generator function, except without
 * the use of `yield` statements.
 */
var FunctionIterator = /** @class */ (function () {
    function FunctionIterator(func, sentinel) {
        this.func = func;
        this.sentinel = sentinel;
    }
    FunctionIterator.prototype[Symbol.iterator] = function () {
        return this;
    };
    /** Works like any generator function `next` method */
    FunctionIterator.prototype.next = function () {
        var _this = this;
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var result = this.func.apply(this, args);
        return result === this.sentinel
            ? ((this.func = (function () { return _this.sentinel; })), { done: true, value: undefined })
            : { done: false, value: result };
    };
    return FunctionIterator;
}());
export { FunctionIterator };
export default FunctionIterator;
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