class - Revision history

Adriweb at 16:16, 2 August 2013

2013-08-02T16:16:46Z

2013-08-02T16:16:18Z

2013-07-15T04:37:12Z

tutorial link url

2012-03-14T22:58:51Z

@@ Line 1: / Line 1: @@
 A complete tutorial about classes is written here: http://inspired-lua.org/index.php/2011/05/5-object-classes/
-Here's how the class() function is defined, in the API :
+Here's how the class([parent]) function is defined, in the API :
 <source lang="lua">

← Older revision		Revision as of 04:37, 15 July 2013
Line 1:		Line 1:
−	A complete tutorial about classes is written here: http://~~www.~~inspired-lua.org/2011/05/5-object-classes/	+	A complete tutorial about classes is written here: http://inspired-lua.org/index.php/2011/05/5-object-classes/

	Here's how the class() function is defined, in the API :		Here's how the class() function is defined, in the API :

@@ Line 4: / Line 4: @@
 <source lang="lua">
 class = function(prototype)
-    local derived = {}
+local derived={}
-    local derivedMT = {
+ 	if prototype then
-        __index = prototype,
+ 		function derived.__index(t,key)
-        __call  = function(proto, ...)
+ 			return rawget(derived,key) or prototype[key]
-            local instance = {}
+ 		end
-            local instanceMT = {
+ 	else
-                __index = derived,
+ 		function derived.__index(t,key)
-                __call = function()
+ 			return rawget(derived,key)
-                    return nil, "attempt to invoke an instance of a class"
+ 		end
-                end,
+ 	end
+ 	function derived.__call(proto,...)
-            setmetatable(instance, instanceMT)
+ 		local instance={}
-            if instance.init then
+ 		setmetatable(instance,proto)
-                instance:init(...)
+ 		local init=instance.init
-            end
+ 		if init then
-            return instance
+ 			init(instance,...)
-        end,
+ 		end
+ 		return instance
-    setmetatable(derived, derivedMT)
+ 	end
-    return derived
+ 	setmetatable(derived,derived)
-end
+ 	return derived
 </source>

← Older revision	Revision as of 16:16, 2 August 2013
(No difference)