Re: creating a new module as an extention of another module
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- Subject: Re: creating a new module as an extention of another module
- From: PA <petite.abeille@...>
- Date: 2006年3月31日 21:21:29 +0200
On Mar 31, 2006, at 17:27, david herviou wrote:
I think it's now very clean with this new package module system but I
have a question on how to do a module
that is an extension of an another module?
Here is another variation on module and inheritance:
function extends( aSuper )
if type( aSuper ) == "string" then
aSuper = require( aSuper )
end
aSuper = aSuper or { __index = _G }
return function( aClass )
setmetatable( aClass, aSuper )
aClass.__index = aClass
aClass.self = aClass
aClass.super = aSuper
return aClass
end
end
-- define the root class
module( "Object", extends() )
function self:doIt()
return "do it"
end
-- define a subclass
module( "MyObject", extends( "Object" ) )
function self:doIt()
return "about to " .. super.doIt( self )
end
-- define another subclass
module( "MyOtherObject", extends( "MyObject" ) )
function self:doIt()
return super.doIt( self ) .. " well"
end
print( self:doIt() )
> about to do it well
Cheers
--
PA, Onnay Equitursay
http://alt.textdrive.com/