意外严格模式保留字 - 收益？节点v0.11，和谐，es6

问题描述

尝试使用新的基于ES6的node.js ODM for Mongo（Robe ）

Trying to use a new ES6 based node.js ODM for Mongo (Robe http://hiddentao.github.io/robe/)

获取意外严格模式保留字错误。我在这里错了吗？

Getting "unexpected strict mode reserved word" error. Am I dong something wrong here?

test0.js

"use strict";
// Random ES6 (works)
{ let a = 'I am declared inside an anonymous block'; }

var Robe = require('robe');

// :(
var db1 = yield Robe.connect('127.0.0.1');

运行它：

C:\TestWS>node --version
v0.11.10

C:\TestWS>node --harmony test0.js

C:\TestWS\test0.js:12
var db1 = yield Robe.connect('127.0.0.1');
          ^^^^^
SyntaxError: Unexpected strict mode reserved word
    at exports.runInThisContext (vm.js:69:16)
    at Module._compile (module.js:432:25)
    at Object.Module._extensions..js (module.js:467:10)
    at Module.load (module.js:349:32)
    at Function.Module._load (module.js:305:12)
    at Function.Module.runMain (module.js:490:10)
    at startup (node.js:123:16)
    at node.js:1031:3

推荐答案

如果您要使用做异步以同步方式运行，您必须这样做：

If you want to use generators to do asynchronous operation in synchronous fashion you must do it like:

co(function*() {
    "use strict";

    { let a = 'I am declared inside an anonymous block'; }

    var Robe = require('robe');

    var db1 = yield Robe.connect('127.0.0.1');
})();

其中 co 实现你可以找到：

where co realization you can find in:

• co
• Task.js
• bluebird's Promise.coroutine
• q's spawn

等等

在严格模式中，您不能使用 yield 的发电机。 非严格模式发生器之外的收益将被视为变量标识符 - 所以在你的情况下抛出错误。

In strict mode you cannot use yield outside of the generators. In non-strict mode outside of the generators yield will be considered as variable identifier - so in your case it'll throw an error anyway.

这篇关于意外严格模式保留字 - 收益？节点v0.11，和谐，es6的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！