add gs

RCCService2018/content/LuaPackages/RoactImpl/createRef.lua

@@ -0,0 +1,20 @@
+--[[
+	Provides an API for acquiring a reference to a reified object. This
+	API is designed to mimic React 16.3's createRef API.
+
+	See:
+	* https://reactjs.org/docs/refs-and-the-dom.html
+	* https://reactjs.org/blog/2018/03/29/react-v-16-3.html#createref-api
+]]
+
+local refMetatable = {
+	__tostring = function(self)
+		return ("RoactReference(%s)"):format(tostring(self.current))
+	end,
+}
+
+return function()
+	return setmetatable({
+		current = nil,
+	}, refMetatable)
+end