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>>Is there any planned support for hexadecimal values for the Lua
>No plans.
If someone need it, I can post my changes to the Lua parser to support 
hexadecimal (and other bases) values. (But it need to be improved)

>>it would be nice to have support for this built-in.)
> Why? "Efficiency"?
Yes. I tested the speed of hex values months ago and IIRC the hex 
constants are twice faster than the function X(s) return tonumber(s,16) 
end. Bytecode is a little bit smaller and should compensate for the Lua 
executable growth.