| | 1 | -- make global variables readonly |
| | 2 | |
| | 3 | local f=function (t,i) error("cannot redefine global variable `"..i.."'",2) end |
| | 4 | local g={} |
| | 5 | local G=getfenv() |
| | 6 | setmetatable(g,{__index=G,__newindex=f}) |
| | 7 | setfenv(1,g) |
| | 8 | |
| | 9 | -- an example |
| | 10 | rawset(g,"x",3) |
| | 11 | x=2 |
| | 12 | y=1 -- cannot redefine `y' |
projects / redis.git / blame_incremental