From: Ryan Davis <ryand-ruby@...>
Date: 2008-01-04T19:38:42+09:00
Subject: Re: parse tree?


On Jan 3, 2008, at 21:06 , Giles Bowkett wrote:

> Well, I'm writing a code generator, and I thought I was very close to
> finished, except I was basically doing this:
>
> generated_code = Generators.module_eval(&block)
>
> And that works great for tiny bits of code, it works at the statement
> level, but when I want to just collect up *all* the statements in a
> block, the whole thing kinds of goes south. So I have something which
> generates all the individual statements perfectly but completely falls
> apart when I want to create several statements.

Does this help?

> >> require 'rubygems' ; require 'ruby2ruby'
> => true
> >> def code_for &block; block.to_ruby; end
> => nil
> >> code_for do
> ?> single_line(statement)
> >> statement(:which => spans,
> ?>               :multiple => lines)
> >> end
> => "proc {\n  single_line(statement)\n  statement(:which =>  
> spans, :multiple => lines)\n}"

There are clean ways to ensure it isn't a proc as well.