Asa@0: -- LibStub is a simple versioning stub meant for use in Libraries.  http://www.wowace.com/wiki/LibStub for more info
Asa@0: -- LibStub is hereby placed in the Public Domain Credits: Kaelten, Cladhaire, ckknight, Mikk, Ammo, Nevcairiel, joshborke
Asa@0: local LIBSTUB_MAJOR, LIBSTUB_MINOR = "LibStub", 2  -- NEVER MAKE THIS AN SVN REVISION! IT NEEDS TO BE USABLE IN ALL REPOS!
Asa@0: local LibStub = _G[LIBSTUB_MAJOR]
Asa@0: 
Asa@0: if not LibStub or LibStub.minor < LIBSTUB_MINOR then
Asa@0: 	LibStub = LibStub or {libs = {}, minors = {} }
Asa@0: 	_G[LIBSTUB_MAJOR] = LibStub
Asa@0: 	LibStub.minor = LIBSTUB_MINOR
Asa@0: 	
Asa@0: 	function LibStub:NewLibrary(major, minor)
Asa@0: 		assert(type(major) == "string", "Bad argument #2 to `NewLibrary' (string expected)")
Asa@0: 		minor = assert(tonumber(strmatch(minor, "%d+")), "Minor version must either be a number or contain a number.")
Asa@0: 		
Asa@0: 		local oldminor = self.minors[major]
Asa@0: 		if oldminor and oldminor >= minor then return nil end
Asa@0: 		self.minors[major], self.libs[major] = minor, self.libs[major] or {}
Asa@0: 		return self.libs[major], oldminor
Asa@0: 	end
Asa@0: 	
Asa@0: 	function LibStub:GetLibrary(major, silent)
Asa@0: 		if not self.libs[major] and not silent then
Asa@0: 			error(("Cannot find a library instance of %q."):format(tostring(major)), 2)
Asa@0: 		end
Asa@0: 		return self.libs[major], self.minors[major]
Asa@0: 	end
Asa@0: 	
Asa@0: 	function LibStub:IterateLibraries() return pairs(self.libs) end
Asa@0: 	setmetatable(LibStub, { __call = LibStub.GetLibrary })
Asa@0: end