From: itsme213 <itsme213@...>
Date: 2005-01-06T17:51:30+09:00
Subject: Re: Ruby design question: lazy construction of object graph containing forward references


"itsme213" <itsme213@hotmail.com> wrote in message
news:kl5Dd.1593$ho.126@fe2.texas.rr.com...

> 1) x = OpenStruct.new
> 2) y = OpenStruct.new(:f0 => x, :f1=>x.forward_ref)
> 3) z = [x, y, x.forward_ref]
> 4) w = y.f1
> 5) foo(y.f1)
> 6) bar(y.f1.f2)
> 7) x.forward_ref = Object.new
>
> I want to build such structures lazily, but be lazy only when the laziness
> is needed i.e. not for :f0=>x, or [x, y, ...], or y.f1.

Oops, typo: should have been "..., or [x, y, ...], but lazy for y.f1".