"use strict";
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
    try {
        var info = gen[key](arg);
        var value = info.value;
    } catch (error) {
        reject(error);
        return;
    }
    if (info.done) {
        resolve(value);
    } else {
        Promise.resolve(value).then(_next, _throw);
    }
}
function _asyncToGenerator(fn) {
    return function() {
        var self = this, args = arguments;
        return new Promise(function(resolve, reject) {
            var gen = fn.apply(self, args);
            function _next(value) {
                asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
            }
            function _throw(err) {
                asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
            }
            _next(undefined);
        });
    };
}
class A {
    foo() {
        return _asyncToGenerator((function*() {
            try {
                return yield _asyncToGenerator((function*(x) {
                    return x + this.val;
                }).bind(this)).bind(this)('a'); // this is undefined
            // return await Promise.all(['a', 'b'].map(async (x) => x + this.val)); // this is undefined
            } catch (e) {
                throw e;
            }
        }).bind(this))();
    }
    constructor(){
        this.val = '1';
    }
}
new A().foo();