Re: perl6 grammar rules in ruby

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On Mon, Mar 01, 2004 at 05:14:47PM +0900, Charles Comstock wrote:
> Has anyone taken a look at the idea of having embedded grammars in ruby 
> like perl6 is intending to add?  For instance, the example they give:
> 
>     grammar Letter {
>         rule text     { <greet> <body> <close> }
> 
>         rule greet :w { [Hi|Hey|Yo] $to:=(\S+?) , $$}
> 
>         rule body     { <line>+ }
> 
>         rule close :w { Later dude, $from:=(.+) }
> 
>         # etc.
>     }

I believe this can be implemented easily in Ruby as it stands now,
without additional keywords. Many domain specific languages have been
defined this way.

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