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- Subject: Re: __method metamethod
- From: Javier Guerra Giraldez <javier@...>
- Date: Fri, 19 Jul 2013 18:02:52 -0500
On Fri, Jul 19, 2013 at 5:46 PM, Coda Highland <firstname.lastname@example.org> wrote:
> My first thought is: What's wrong with the colon operator? What
> problem does this suggestion actually solve?
as i understand it, it's not (mostly) about the color or dot
operators, but about being able to use a bound method as a value.
a slightly better proposal could be: don't modify the current
operators, but add this syntax:
local f = o:m
as syntax sugar to:
local f = function(...) return o.m(o, ...) end
i think it's better than Greg's proposal because it doesn't magically
changes the meaning of an existing operator (dot), instead uses a
currently invalid syntax.
of course, Greg assumed that being in the core would somehow avoid
closure creation, but i doubt that would be simple. Still, it
postpones it until (if) it's needed, so it wouldn't have any impact on
any code that doesn't need it.
said that, i don't see the need, it's not so ugly to define a
return function(...) return o[m](o,...) end
then, you could get a bound method as:
local f = bind(o,'methodname')