Re: Assign idiom
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- Subject: Re: Assign idiom
- From: "Leigh McRae" <leigh.mcrae@...>
- Date: Thu, 8 Mar 2007 13:11:24 -0500
Actually I think your last one is really good. I was also thinking of the
multi-return idea but some of the code comes from C++ bindings. So
W_TextRegion() is a wrapper for my C++ class. I didn't really want to
change all my C++ code to suit lua.
self.spName = W_TextRegion()
local sp = self.spName
sp:autoSize()
sp:setJustify( W_TextObject_Left )
sp:setFont( UI_Fonts.Comic_18 )
sp:anchor( W_Region_TopLeft, W_Region_TopLeft, self:getRegion(
W_Region_Center ) )
self:addRegion( "FOREGROUND", sp )
So I could the following:
function SetIdiom(tb, v)
tb = v
return v
end
local sp = SetIdiom( self.spBackGround, W_TextRegion() )
Not bad, little hard on the eyes :)
----- Original Message -----
From: "Doug Rogers" <rogers@innocon.com>
To: "Lua list" <lua@bazar2.conectiva.com.br>
Sent: Thursday, March 08, 2007 12:58 PM
Subject: Re: Assign idiom
Leigh McRae wrote:
I am looking for something along the lines of:
local sp = self.spBackGround = CreateSprite()
sp:setSize( 10, 10 )
If setSize() returns the sprite, then:
self.spBackGround = CreateSprite():setSize(10, 10)
It's hard to see a way to avoid a multiple assignment to capture to a
local variable. Perhaps:
function dup(x) return x, x end
local sp
sp, self.spBackGround = dup(CreateSprite():setSize(10, 10))
Looks like that one was already suggested! You might also try:
function self:set(k, v)
self[k] = v
return v
end
local sp = self:set('spBackGround', CreateSprite()):setSize(10,10)
I think your original code is easier to read.
Doug
--
Innovative Concepts, Inc. www.innocon.com 703-893-2007 x220