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JSON.parse用什么编写/它是开源的吗？

[英]What is JSON.parse written in / Is it open source?

原文 2012-01-13 00:18:05 6 4 php/ javascript/ json

PHP funcitons are written in C and you can look at the source code if you like. PHP函数是用C编写的，您可以根据需要查看源代码。 For example here - session_start source 例如此处-session_start源

What about with Javascript? Java脚本呢？ How are functions like JSON.parse implemented? JSON.parse之类的函数如何实现？ Where can I go to view the source? 我在哪里可以查看源代码？

Thanks! 谢谢！

4 个解决方案

JSON.parse is native. JSON.parse是本机的。 That means it's defined in the browser, the implementation of the method is browser implementation specific. 这意味着它是在浏览器中定义的，该方法的实现是特定于浏览器实现的。

v8 (Chrome) has a C++ method for JsonParser::ParseJson v8（Chrome）对于JsonParser::ParseJson具有C ++方法

spidermonkey (Firefox) has a C++ function for js_json_parse 的SpiderMonkey（火狐）具有用于C ++函数js_json_parse

JavaScriptCore (Webkit / Safari) has a C++ function for JSONProtoFuncParse JavaScriptCore（Webkit / Safari）具有JSONProtoFuncParse的C ++函数

Rhino (Mozilla) has a Java method for parseValue Rhino（Mozilla）具有用于parseValue的Java方法

the Opera and IE implementations are closed source. Opera和IE实现是封闭源代码。 I also think Nitro's implementation is closed source aswell. 我也认为Nitro的实现也是封闭源代码。

Note there are many other JavaScript engines. 请注意，还有许多其他JavaScript引擎。

Each JavaScript engine that supports it will have its own implementation of JSON.parse . 每个支持它的JavaScript引擎都有其自己的JSON.parse实现。 You can view the code of the various open source engines ( V8 , SpiderMonkey ) in their respective repositories. 您可以在各自的存储库中查看各种开源引擎（ V8 ， SpiderMonkey ）的代码。 You can also view a JavaScript implementation on Crockford's github page (Crockford being the person who came up with JSON ) — actually, more than one; 您还可以在Crockford的github页面上查看JavaScript实现（Crockford是提出JSON的人）–实际上，不止一个； there's a version that's a state machine, and another that's a recursive descent parser, and another that relies on eval (which is kind of cheating). 有一个版本是状态机，另一个是递归下降解析器，而另一个则依赖于eval （有点作弊）。 There are also various implementations in various languages linked from the JSON home page . 从JSON主页链接的语言也有多种实现。

It depends on the browser. 这取决于浏览器。 You view the source of your favorite and see if you can find it there. 您查看喜欢的来源，然后查看是否可以在其中找到它。

Depends on the browser. 取决于浏览器。

For example: Chrome is using the V8 javascript engine. 例如：Chrome使用的是V8 JavaScript引擎。 http://code.google.com/p/v8/ which may include that inside itself, or that could be a part of the Chromium project http://www.chromium.org/Home . http://code.google.com/p/v8/ （可能包含在其内部），也可能是Chromium项目http://www.chromium.org/Home的一部分。