From: MenTaLguY <mental@...>
Date: 2005-11-04T21:52:23+09:00
Subject: Re: [ANN] lazy.rb

--=-MIR4BzBPMjYxad4/vjsX
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

On Fri, 2005-11-04 at 16:42 +0900, Pit Capitain wrote:
> Hi mental,
>=20
> do you have some unit tests or an example where implicit forcing isn't=20
> working as you'd like?

Err... unit tests.  Those would be nice.

But, here are a couple examples:

 blah =3D promise { 3 }
 p blah.methods.include? "+" # =3D> false, failed to force
 force( blah )
 p blah.methods.include? "+" # =3D> true

...and:

 foo =3D promise { 3 }
 begin
   p [][foo] # TypeError: can't convert Lazy::Thunk into Integer
 rescue TypeError =3D> e
   puts e
 end
 force( foo )
 p [][foo] # =3D> nil

Same problem in both cases, basically.

Oh, and if you try these in irb, remember that you will get different
results because irb's attempt to display the result value will force the
promise.

-mental

--=-MIR4BzBPMjYxad4/vjsX
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQBDa1mccUNIGiXCc4MRAnLjAKCPySixdpXlOlftu3can8gatLhe6wCeIw9N
gqZn/M6asBM8YCeFBJl0ZaM=
=IyHW
-----END PGP SIGNATURE-----

--=-MIR4BzBPMjYxad4/vjsX--