diff options
Diffstat (limited to 'share/lua/test/readonly.lua')
| -rw-r--r-- | share/lua/test/readonly.lua | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/share/lua/test/readonly.lua b/share/lua/test/readonly.lua new file mode 100644 index 0000000..85c0b4e --- /dev/null +++ b/share/lua/test/readonly.lua @@ -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' |