Initial commit

data/core/strict.lua

@@ -0,0 +1,26 @@
+local strict = {}
+strict.defined = {}
+
+
+-- used to define a global variable
+function global(t)
+  for k, v in pairs(t) do
+    strict.defined[k] = true
+    rawset(_G, k, v)
+  end
+end
+
+
+function strict.__newindex(t, k, v)
+  error("cannot set undefined variable: " .. k, 2)
+end
+
+
+function strict.__index(t, k)
+  if not strict.defined[k] then
+    error("cannot get undefined variable: " .. k, 2)
+  end
+end
+
+
+setmetatable(_G, strict)