From: Judson Lester <nyarly@...>
Date: 2009-11-12T09:41:49+09:00
Subject: Re: Need help to detect error

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That's bizarre.  All that I can see that's different is because the failing
version uses the attribute "bparent" and the other uses "parent", the
backreferences occur in different places in the resulting YAML.  I believe
that Syck was taking over when _why left - you ought to file a bug.

(Unless there's an obscure YAML rule that backreferences have to occur afte=
r
literal values...)

Judson

2009/11/11 V=C3=ADctor Adri=C3=A1n <adrian@lobotuerto.com>

> Or anyone knows where can I contact some YAML guys to help me with this
> obscure problem?
>
> El mi=C3=A9, 11-11-2009 a las 16:58 +0900, V=C3=ADctor Adri=C3=A1n de la =
Cruz Serrano
> escribi=C3=B3:
> > I don't know what am I doing wrong, can anyone help me?
> > These two programs look very similar, but they yield different results.
> > Can anyone confirm this "error"?
> >
> >
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > # FAILING EXAMPLE
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > class Battlefield
> >   attr_accessor :teams
> >   def initialize
> >     @teams =3D []
> >   end
> >   def add_team(team)
> >     @teams << team
> >     team.bparent =3D self
> >   end
> > end
> >
> > class Team
> >   attr_accessor :members, :bparent
> >   def initialize
> >     @members =3D []
> >     @bparent =3D nil
> >   end
> >   def add_member(child)
> >     @members << child
> >     child.team =3D self
> >   end
> > end
> >
> > class Warrior
> >   attr_accessor :team
> >   def initialize
> >     @team =3D nil
> >   end
> > end
> >
> > w =3D Warrior.new
> > t =3D Team.new
> > t.add_member(w)
> > b =3D Battlefield.new
> > b.add_team(t)
> > b.inspect
> > #Convert to YAML and back
> > y =3D YAML.load(b.to_yaml)
> > #Now have a look at the "members" array inside a team... it's gone
> > y.inspect
> > y.teams.first.members.inspect
> >
> >
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > # GOOD EXAMPLE
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > require 'yaml'
> >
> > class Battlefield
> >   attr_accessor :teams
> >   def initialize
> >     @teams =3D []
> >   end
> >   def add_team(team)
> >     @teams << team
> >     team.parent =3D self
> >   end
> > end
> >
> > class Team
> >   attr_accessor :members, :parent
> >   def initialize
> >     @members =3D []
> >     @parent =3D nil
> >   end
> >   def add_member(child)
> >     @members << child
> >     child.team =3D self
> >   end
> > end
> >
> > class Warrior
> >   attr_accessor :team
> >   def initialize
> >     @team =3D nil
> >   end
> > end
> >
> > w =3D Warrior.new
> > t =3D Team.new
> > t.add_member(w)
> > b =3D Battlefield.new
> > b.add_team(t)
> > b.inspect
> > #Convert to YAML and back
> > y =3D YAML.load(b.to_yaml)
> > #Now have a look at the "members" array inside a team, it's still there
> > y.inspect
> > y.teams.first.members.inspect
> >
> >
> >
>
>
>
>

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