Re: How to properly initialize a module?

[Rob Hoelz <rob@...>]

Responses are inline.

On Tue, 6 Dec 2011 11:17:12 -0800 (PST)
Ezequiel García <elezegarcia@yahoo.com.ar> wrote:

> --- El mar 6-dic-11, Rob Hoelz <rob@hoelz.ro> escribió:
> 
> > De: Rob Hoelz <rob@hoelz.ro>
> > Asunto: Re: How to properly initialize a module?
> > Para: lua-l@lists.lua.org
> > Fecha: martes, 6 de diciembre de 2011, 16:41
> > That's kind of a neat idiom; you
> > could easily then do something like
> > this:
> > 
> > local canvas = require 'canvas' '/dev/fb0'
> > 
> > or even this:
> > 
> > local canvas = require 'canvas' {
> >   device = '/dev/fb0'
> > }
> 
> I am confused about this. Is this valid syntax?

Yup!  The first example is equivalent to the following:

    local canvas = require('canvas')('/dev/fb0')

And the second:

    local canvas = require('canvas')({ device = '/dev/fb0' })

> 
> How would I implement from C side? What's the difference between
> require 'foo'.func() and require 'foo' 'bar' ?

"require 'foo'.func()" translates to something like this:

local m = require('foo')
m.func()

whereas "require 'foo' 'bar'" translates to this:

local m = require('foo')
m('bar')

You could implement my idiom from the C-side like this:

https://gist.github.com/1439633

-Rob

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