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DSL design advice [message #723560]

Thu, 08 September 2011 19:54

Rafael Angarita

Messages: 94
Registered: November 2010

Member

Hello, I need a HTML section inside one of my objects. For example,

Model:
	"Name: " name=ID
	"Description: {" description=Description
	"}"
;

Description:
	"<html>"
		 //more HTML code
	"</html>"
;

I have thought of this problems:

- The HTML tags and attributes would introduce many keywords to may language and I don't want to use the escape character everywhere in my code.
- The HTML grammar is case-insensitive. I have tried the ignoreCase option, but I don't want all my DSL to be case-insensitive, only de HTML grammar.

What would you recommend me?

Thanks!

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Re: DSL design advice [message #723588 is a reply to message #723560]

Thu, 08 September 2011 21:57

Henrik Lindberg

Messages: 2509
Registered: July 2009

Senior Member

Solution depends on the rest of your grammar / terminals.

The easiest is to have a terminal that eats everything from '<html>' to
'</html>' If you do not allow the '<' and 'html' and '>' to be separated
with whitespace something like this:

terminal HTML : '<html>' -> '</html>' ;

You have to give this terminal the highest precedence as you do not want
comments and strings inside the html to be lexed as such.

There are more options that require a bit more work.
- henrik

On 9/8/11 9:54 PM, Rafael Angarita wrote:
> Hello, I need a HTML section inside one of my objects. For example,
>
>
> Model:
> "Name: " name=ID
> "Description: {" description=Description
> "}"
> ;
>
> Description:
> "<html>"
> //more HTML code
> "</html>"
> ;
>
>
>
> I have thought of this problems:
>
> - The HTML tags and attributes would introduce many keywords to may
> language and I don't want to use the escape character everywhere in my
> code.
> - The HTML grammar is case-insensitive. I have tried the ignoreCase
> option, but I don't want all my DSL to be case-insensitive, only de HTML
> grammar.
>
> What would you recommend me?
>
> Thanks!
>
>

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