用Javascript编写的Lexer？ [英] Lexer written in Javascript?
问题描述
我有一个项目，用户需要为一个完全用javascript编写的ui定义一组指令。我需要能够解析一串指令然后将它们转换成指令。是否有任何库可用于解析100％javascript？或者将在javascript中生成的生成器？谢谢！
I have a project where a user needs to define a set of instructions for a ui that is completely written in javascript. I need to have the ability to parse a string of instructions and then translate them into instructions. Is there any libraries out there for parsing that are 100% javascript? Or a generator that will generate in javascript? Thanks!
推荐答案
像 http://jscc.phorward-software.com/ ，也许？
JS/CC is the first available parser development system for JavaScript and ECMAScript-derivates. It has been developed, both, with the intention of building a productive compiler development system and with the intention of creating an easy-to-use academic environment for people interested in how parse table generation is done general in bottom-up parsing.
独立于平台的软件工会：基于正则表达式词法分析器生成器匹配输入字符流中的各个令牌和 a LALR（1）解析器生成器上获取有关LALR（1）的更多信息，计算给定的更多关于Context-Free Grammars维基百科的信息 - 免费语法规范和bu建立一个独立的，有效的解析器。提供给JS / CC的无上下文语法在 Backus-Naur-Form 为基础的元语言形式，允许插入单个语义代码，以便根据规则的减少进行评估。
The platform-independent software unions both: A regular expression-based lexical analyzer generator matching individual tokens from the input character stream and a LALR(1) parser generator, computing the parse tables for a given context-free grammar specification and building a stand-alone, working parser. The context-free grammar fed to JS/CC is defined in a Backus-Naur-Form-based meta language, and allows the insertion of individual semantic code to be evaluated on a rule's reduction.
JS / CC本身完全用ECMAScript编写，因此可以通过多种不同的方式执行：作为平台无关，嵌入在网站上的基于浏览器的JavaScript，作为Windows脚本宿主应用程序，作为编译JScript.NET可执行文件，作为Mozilla / Rhino或Mozilla / Spidermonkey解释的应用程序，或Windows，* nix，Linux和Mac OSX上的V8 shell脚本。但是，为了高效执行，建议使用命令行版本。这些版本能够从JS / CC解析器规范组装完整的编译器，然后将其存储到.js JavaScript源文件中。
JS/CC itself has been entirely written in ECMAScript so it can be executed in many different ways: as platform-independent, browser-based JavaScript embedded on a Website, as a Windows Script Host Application, as a compiled JScript.NET executable, as a Mozilla/Rhino or Mozilla/Spidermonkey interpreted application, or a V8 shell script on Windows, *nix, Linux and Mac OSX. However, for productive execution, it is recommended to use the command-line versions. These versions are capable of assembling a complete compiler from a JS/CC parser specification, which is then stored to a .js JavaScript source file.
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