From: Tobias Reif <tobiasreif@...>
Date: 2002-01-14T18:38:24+09:00
Subject: Re: MetaRuby : RubySchema.rb howto?

Robert Feldt wrote:

> Hi Tobias et al,
> 
> FYI, I've played with the following way of specifying pretty-printers for
> RubyAst/RubyTerms/RubySchema in Rockit (its got a similar scheme to
> Matju's but its not typed; will probably use Matju's scheme in future
> versions):
> 
> * You specify PPDoc's by giving a string with slots that can be later
> filled in. Slots are given as "#" followed by a number starting at
> 0. Example (for a simple if without else-clause etc):
> 
>    p1 = PPDoc["if (#0)\n  #1\nend"]
>    p2 = PPDoc["#0 == #1"]
> 
>    p2[1,2].to_s #=> "1 == 2"
> 
>    p1[p2["a", 1], "puts a\na"].to_s 
> 
>    gives:
> 
>    if (a == 1)
>      puts a
>      a
>    end


Looks good. Would the above be the actual usage? Or could I pass 
RubySchema objects like ClassDef (or "DefClass"?) to the pretty-printer?

Tobi




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