在TinyPG中使用BNF中的现有语言吗? [英] Use existing languages in BNF with TinyPG?

问题描述

如何使用这些BNF语法 ="http://www.devincook.com/GOLDParser/doc/meta-language/index.htm" rel ="nofollow noreferrer">使用TinyPG的GOLD元语法(RegExp + BNF)?我是BNF的新手，那么大约需要什么类型的转换才能将BNF转换为EBNF?

我相信它应该非常简单，因为与Greg语法RegExp + BNF 相比，TinyPG需要RegExp + EBNF .

还有，TinyPG的源代码是否适用于任何语言，只是看我将要进行哪种转换?

解决方案

EBNF不能与BNF完全向下兼容，但是实际上差异很小，您应该熟悉该文档

http://www.cs.cmu.edu/~pattis/misc/ebnf.pdf

首先，您必须处理特殊字符<> |:=(用双引号引起来).

如果解析器可以使用一种受支持的语言，则可以仅使用GOLD元语法引擎输出解析器-而不是使用TinyPG ...

这引出了一个问题-解析器实现时将使用哪种语言?

How can I use these BNF grammars which are in GOLD meta-syntax (RegExp + BNF) with TinyPG? I'm new to BNF so approximately what sort of conversion will I have to do to convert BNF to EBNF?

I believe it should be pretty simple since TinyPG needs RegExp + EBNF in comparison to the GOLD grammars which are RegExp + BNF.

Also, is there any TinyPG source code for any language available, just to see what sort of conversion I would have to do?

解决方案

EBNF is not entirely backwards compatible with BNF, however the differences are actually slight, you should be familiar with the document at

http://www.cs.cmu.edu/~pattis/misc/ebnf.pdf

Primarily you have to handle the special characters <>|:= (enclosed in double quotes).

You could just use the GOLD meta-syntax engine to output your parser if it can be in one of the supported languages - instead of using TinyPG...

It begs the question - What language will your parser be in when you are implementing it?

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