[TxMt] Lout language definition?

[Allan Odgaard]

On 7/8/2006, at 15:08, Alaric Snell-Pym wrote:

> Has anyone thought about a language definition for the Lout document
> formatting system?
>
> I may write one myself, but I'm a bit nervous about it since Lout has
> an awkwardly wide range of ways of indicating the beginnings and ends
> of things.

You can use look-ahead and look-behind in both the begin and end  
patterns in a language grammar.

So for example a paragraph would end when the next one starts, or a  
blank line, calling for a rule like:

     {   name = "meta.paragraph.lout";
         begin = "^@PP$";
         end = "(?^(@PP)?$)";
     }

Here the paragraph ends either when the line is blank or just  
contains @PP, but it does not parse the actual line.