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To: d...@sidhe.org (Dan Sugalski)
Subject: Re: keyed vtables and mmd
In-Reply-To: <a06100507bcb57c1f2582@[10.0.1.3]>
References: <a06100507bcb57c1f2582@[10.0.1.3]>
Reply-To: l...@toetsch.at
Cc: perl6-intern...@perl.org
Date: Wed, 28 Apr 2004 20:21:04 +0200
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From: l...@toetsch.at (Leopold Toetsch)

Dan Sugalski <d...@sidhe.org> wrote:

> We toss the keyed variants for everything but get and set. And... we
> move *all* the operator functions out of the vtable and into the MMD
> system. All of it. Math, logical ops, bit ops... the works. All
> that's left are the gets, sets, and meta-information entries. (Type,
> class, elements, and suchlike stuff) We rework the current pmc
> processor to take the entries that are getting tossed and
> automatically add them to the MMD tables on PMC load instead.

Sounds good. C<add_p_p_p> and friends isn't really fast now due to some
type checks. And that's only for Perl types. Would be much more for
multiple HLL. Putting in specialized MMD functions for each type
combination is better, but can cause huge tables for too much
[types*vtable_entries]**2.

But anyway I think it's the right thing todo.

But we have to consider "utility" PMCs like C<Env> or C<*struct> that
don't really match the concept of MMD.

leo