From 14fa5cd8b00cf10d53c829caa0d5f9b40a3d8d3f Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Mon, 15 Nov 2021 03:10:34 +0800
Subject: *rename

---
 Data/DefaultContent/Libraries/strict.lua | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Data/DefaultContent/Libraries/strict.lua

(limited to 'Data/DefaultContent/Libraries/strict.lua')

diff --git a/Data/DefaultContent/Libraries/strict.lua b/Data/DefaultContent/Libraries/strict.lua
new file mode 100644
index 0000000..6f67fc0
--- /dev/null
+++ b/Data/DefaultContent/Libraries/strict.lua
@@ -0,0 +1,30 @@
+local mt = getmetatable(_G)
+if mt == nil then
+  mt = {}
+  setmetatable(_G, mt)
+end
+
+__STRICT = true
+mt.__declared = {}
+
+mt.__newindex = function (t, n, v)
+  if __STRICT and not mt.__declared[n] then
+    local w = debug.getinfo(2, "S").what
+    if w ~= "main" and w ~= "C" then
+      error("assign to undeclared variable '"..n.."'", 2)
+    end
+    mt.__declared[n] = true
+  end
+  rawset(t, n, v)
+end
+  
+mt.__index = function (t, n)
+  if not mt.__declared[n] and debug.getinfo(2, "S").what ~= "C" then
+    error("variable '"..n.."' is not declared", 2)
+  end
+  return rawget(t, n)
+end
+
+function global(...)
+   for _, v in ipairs{...} do mt.__declared[v] = true end
+end
\ No newline at end of file
-- 
cgit v1.1-26-g67d0