--禁用默认全局变量
-- export global variable
local __g = _G
BF = BF or {}
BF.exports = BF.exports or {}
setmetatable(BF.exports, {
    __newindex = function(_, name, value)
        rawset(__g, name, value)
    end,

    __index = function(_, name)
        return rawget(__g, name)
    end
})

-- disable create unexpected global variable
local function disableGlobal()
    setmetatable(__g, {
        __newindex = function(_, name, value)
            print("new index, name is :", name)
            error(string.format("USE \" BF.exports.%s = value \" INSTEAD OF SET GLOBAL VARIABLE", name), 0)
        end
    })
end

BF.disableGlobal = disableGlobal

disableGlobal()