ts-tco/index.js

Utility for flattening tail recursion in TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.tco = exports.TcoThen = exports.Tco = exports.executeTco = void 0;
exports.executeTco = function (v) {
    var _a;
    var value = v;
    var maps = [];
    while (value instanceof Tco || value instanceof TcoThen || maps.length)
        if (value instanceof TcoThen) {
            maps.unshift(value.func);
            value = value.from;
        }
        else if (value instanceof Tco) {
            value = value.func();
        }
        else if (maps.length) {
            value = (_a = maps.shift()) === null || _a === void 0 ? void 0 : _a(value);
        }
    return value;
};
var Tco = /** @class */ (function () {
    function Tco(func) {
        this.func = func;
    }
    Tco.prototype.execute = function () {
        return exports.executeTco(this);
    };
    Tco.prototype.then = function (func) {
        return new TcoThen(this, func);
    };
    return Tco;
}());
exports.Tco = Tco;
var TcoThen = /** @class */ (function () {
    function TcoThen(from, func) {
        this.from = from;
        this.func = func;
    }
    TcoThen.prototype.execute = function () {
        return exports.executeTco(this);
    };
    TcoThen.prototype.then = function (func) {
        return new TcoThen(this, func);
    };
    return TcoThen;
}());
exports.TcoThen = TcoThen;
exports.tco = function (f) { return new Tco(f); };