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* lib/lua/test: Add.

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iratqq 2008-01-11 12:02:44 +00:00
commit e8ac11b670
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trunk/lib/lua/test/readonly.lua Normal file
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@ -0,0 +1,12 @@
-- make global variables readonly
local f=function (t,i) error("cannot redefine global variable `"..i.."'",2) end
local g={}
local G=getfenv()
setmetatable(g,{__index=G,__newindex=f})
setfenv(1,g)
-- an example
rawset(g,"x",3)
x=2
y=1 -- cannot redefine `y'