Re: Need standard kernel supported class in Lua, was: Macros and expressivity
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- Subject: Re: Need standard kernel supported class in Lua, was: Macros and expressivity
- From: "steve donovan" <steve.j.donovan@...>
- Date: 2008年1月14日 15:21:37 +0200
On Jan 14, 2008 11:42 AM, Grellier, Thierry <t-grellier@ti.com> wrote:
> In that case, I don't understand why then not returning a class table to
> benefit Lua unaltered and compact syntax?
If you want Python-style class declarations, you can do that simply enough:
function class(body)
local mt = {G = _G}
mt.__index = mt
setfenv(body,mt)
body()
function mt.new()
local self = {}
setmetatable(self,mt)
return self
end
return mt
end
animal = class(function()
function speak(self)
G.print ('growl '..self:get_name())
end
function set_name(self,s)
self.name = s
end
function get_name(self)
return self.name
end
end)
a = animal.new()
a:set_name 'fido'
a:speak()
With a little extra macro sugar, this is a quite painless syntax!
Multiple inheritance can be implemented with a little extra trouble,
and you can probably get a proper global context as well for the
methods, as well.
steve d.