"use strict";

let Promise = require("bluebird");

function wrap(func) {
    let str = func.toString();
    let args = str.substring(str.indexOf("(") + 1, str.indexOf(")")).split(",");
    str = str.substring(str.indexOf("{") + 1, str.length - 1);
    str = "try {" + str + "}catch(err){console.error(err);console.log('error\\n');}";
    args.push(str);
    return Promise.coroutine(Object.getPrototypeOf(function*() {}).constructor.apply(null, args));
}

wrap(function*(n) {
    yield Promise.reject(n);
})(6);

wrap(function*(x) {
    var num = yield Promise.resolve(x);
    return num;
})(4).then(console.log);