From 7d9c43916b0600ac4879dfe9793eab807a83ab2b Mon Sep 17 00:00:00 2001
From: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Date: Mon, 10 Mar 2014 22:45:18 +0200
Subject: rename ACF2 to Alpine Configurator (aconf)

---
 aconf/object.lua | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 aconf/object.lua

(limited to 'aconf/object.lua')

diff --git a/aconf/object.lua b/aconf/object.lua
new file mode 100644
index 0000000..64fbb9c
--- /dev/null
+++ b/aconf/object.lua
@@ -0,0 +1,68 @@
+--[[
+Copyright (c) 2012-2013 Kaarle Ritvanen
+See LICENSE file for license details
+--]]
+
+local M = {}
+
+function M.class(base)
+   local cls = {}
+
+   local mt = {
+      __call=function(self, ...)
+		local obj = {}
+		setmetatable(obj, {__index=cls, class=cls})
+		obj:init(...)
+		return obj
+	     end
+   }
+
+   if not base and M.Object then base = M.Object end
+   if base then
+      cls._base = base
+      mt.__index = base
+   end
+
+   return setmetatable(cls, mt)
+end
+
+
+M.Object = M.class()
+
+function M.Object:init(...) end
+
+
+function M.super(obj, cls)
+   assert(M.isinstance(obj, cls))
+
+   local mt = {}
+
+   function mt.__index(t, k)
+      local v = cls._base[k]
+      if type(v) ~= 'function' then return v end
+      return function(...)
+		local arg = {...}
+		arg[1] = obj
+		return v(unpack(arg))
+	     end
+   end
+
+   return setmetatable({}, mt)
+end
+
+
+function M.issubclass(cls1, cls2)
+   if cls1 == cls2 then return true end
+   if cls1._base then return M.issubclass(cls1._base, cls2) end
+   return false
+end
+
+function M.isinstance(obj, cls)
+   if not obj or type(obj) ~= 'table' then return false end
+   local mt = getmetatable(obj)
+   if not mt then return false end
+   return type(obj) == 'table' and mt.class and M.issubclass(mt.class, cls)
+end
+
+
+return M
-- 
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