Added lua into the kitchen sink demo.

demo/demo.js

@@ -54,6 +54,7 @@ var CssMode = require("ace/mode/css").Mode;
 var ScssMode = require("ace/mode/scss").Mode;
 var HtmlMode = require("ace/mode/html").Mode;
 var XmlMode = require("ace/mode/xml").Mode;
+var LuaMode = require("ace/mode/lua").Mode;
 var PythonMode = require("ace/mode/python").Mode;
 var PhpMode = require("ace/mode/php").Mode;
 var JavaMode = require("ace/mode/java").Mode;
@@ -124,10 +125,15 @@ exports.launch = function(env) {
     docs.html.setMode(new HtmlMode());
     docs.html.setUndoManager(new UndoManager());
 
+    docs.lua = new EditSession(require("ace/requirejs/text!demo/docs/lua.lua"));
+    docs.lua.setMode(new LuaMode());
+    docs.lua.setUndoManager(new UndoManager());
+
     docs.python = new EditSession(require("ace/requirejs/text!demo/docs/python.py"));
     docs.python.setMode(new PythonMode());
     docs.python.setUndoManager(new UndoManager());
 
+
     docs.php = new EditSession(require("ace/requirejs/text!demo/docs/php.php"));
     docs.php.setMode(new PhpMode());
     docs.php.setUndoManager(new UndoManager());
@@ -222,6 +228,7 @@ exports.launch = function(env) {
         css: new CssMode(),
         scss: new ScssMode(),
         javascript: new JavaScriptMode(),
+        lua: new LuaMode(),
         python: new PythonMode(),
         php: new PhpMode(),
         java: new JavaMode(),
@@ -287,6 +294,9 @@ exports.launch = function(env) {
         else if (mode instanceof XmlMode) {
             modeEl.value = "xml";
         }
+        else if (mode instanceof LuaMode){
+            modeEl.value = "lua";
+        }
         else if (mode instanceof PythonMode) {
             modeEl.value = "python";
         }
@@ -524,6 +534,8 @@ exports.launch = function(env) {
                     mode = "css";
                 } else if (/^.*\.scss$/i.test(file.name)) {
                     mode = "scss";
+                } else if (/^.*\.lua$/i.test(file.name)) {
+                    mode = "lua";
                 } else if (/^.*\.py$/i.test(file.name)) {
                     mode = "python";
                 } else if (/^.*\.php$/i.test(file.name)) {

demo/docs/lua.lua

@@ -0,0 +1,36 @@
+--[[--
+num_args takes in 5.1 byte code and extracts the number of arguments
+from its function header.
+--]]--
+
+function int(t)
+	return t:byte(1)+t:byte(2)*0x100+t:byte(3)*0x10000+t:byte(4)*0x1000000
+end
+
+function num_args(func)
+	local dump = string.dump(func)
+	local offset, cursor = int(dump:sub(13)), offset + 26
+	--Get the params and var flag (whether there's a ... in the param)
+	return dump:sub(cursor):byte(), dump:sub(cursor+1):byte()
+end
+
+-- Usage:
+num_args(function(a,b,c,d, ...) end) -- return 4, 7
+
+-- Python styled string format operator
+local gm = debug.getmetatable("")
+
+gm.__mod=function(self, other)
+    if type(other) ~= "table" then other = {other} end
+    for i,v in ipairs(other) do other[i] = tostring(v) end
+    return self:format(unpack(other))
+end
+
+print([===[
+    blah blah %s, (%d %d)
+]===]%{"blah", num_args(int)})
+
+--[=[--
+table.maxn is deprecated, use # instead.
+--]=]--
+print(table.maxn{1,2,[4]=4,[8]=8) -- outputs 8 instead of 2