From: Louis-Philippe <default@...>
Date: 2009-06-03T23:16:39+09:00
Subject: Re: block as string

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Thanks Brian,
It's a neat trick!  I'll remember it!

I'm not sure I'll use it though, as it require you define the function
inside a string...
a bit cumbersome.

what I need is some sort of macro system (the LISP macro, not the C one),
to parse the block before calling it.  I was thinking to make it a string,
then parsing with regex, would have done it... but seems not.  I'll work out
an other logic around the problem then ;).

L-P

2009/6/3 Brian Candler <b.candler@pobox.com>

> Louis-Philippe wrote:
> > any other idea?
>
> Well, you can remember the string form at the time you define the
> lambda.
>
> def fn(str)
>  res = eval "lambda { #{str} }"
>  class <<res; self; end.class_eval { define_method(:source) { str } }
>  res
> end
>
> a = fn "|x| puts x+x"
> a["Hello"]
> puts a.source
> --
> Posted via http://www.ruby-forum.com/.
>
>

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