异步函数通过Thunk话在generator中自动执行

'use strict'const fs = require('fs');//将一个异步函数转换为Thunk型函数var toThunk = function(fun){//参数一个异步函数    return function(...args){        return function(callback){            fun.call(this,...args,callback);        }    }}function f(a,fun){    fun(a);}toThunk(f)('23')(console.log);var readFileThunk = toThunk(fs.readFile);var reads = function * (){    let data1 = yield readFileThunk('./c3.js');    console.log(data1.toString());    let data2 = yield readFileThunk('./c9.js');    console.log(data2.toString());    return 'over';}//下面函数执行自动执行generator函数function run(f){    var gen = f();    function next(err,data){        var result = gen.next(data);        //将异步执行的结果返回给genetator函数        //generator函数继续执行        //遇到yield返回其后的表达式        if (result.done) {            console.log(result.value);            return;        }        result.value(next);    }    next();}run(reads);