yzyCli/u3d/Lua/tolua/misc/strict.lua

-- --
-- -- strict.lua
-- -- checks uses of undeclared global variables
-- -- All global variables must be 'declared' through a regular assignment
-- -- (even assigning nil will do) in a main chunk before being used
-- -- anywhere or assigned to inside a function.
-- --
-- -- modified for better compatibility with LuaJIT, see:
-- -- http://www.freelists.org/post/luajit/strictlua-with-stripped-bytecode

-- local getinfo, error, rawset, rawget = debug.getinfo, error, rawset, rawget

-- local mt = getmetatable(_G)
-- if mt == nil then
--   mt = {}
--   setmetatable(_G, mt)
-- end

-- mt.__declared = {}

-- mt.__newindex = function (t, n, v)
--   if not mt.__declared[n] then
--     local info = getinfo(2, "S")
--     if info and info.linedefined > 0 then
--       LogError("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] then
--     local info = getinfo(2, "S")
--     if info and info.linedefined > 0 then
--       LogError("variable '"..n.."' is not declared", 2)
--     end
--   end
--   return rawget(t, n)
-- end