shift and bitwise comparison

[LuMo]

how can i implement

op1 | op2 Bitwise OR if both operands are numbers;
conditional OR if both operands are boolean

in lua? seems that this is not implemented as default

further i'm missing the shift

op1 << op2 Shift bits of op1 left by distance op2; fills with zero bits on the right-hand side

shift could be possible solved by *2 and div2 thats right?
any ideas?

[Shine]

Lua has no binary relational operators, but looks like it could be useful for some low-level calculations, so I've added the "Bitwise operators and hexadecimal support" patch from http://lua-users.org/wiki/LuaPowerPatches and it will be available in the next release, maybe this weekend. Of course, shift operators need no patch, because x << y == x * math.pow(2, y) and x >> y == math.floor(x / math.pow(2, y)).

[LuMo]

great thanks

[Arwin]

Lua has no binary relational operators, but looks like it could be useful for some low-level calculations, so I've added the "Bitwise operators and hexadecimal support" patch from http://lua-users.org/wiki/LuaPowerPatches and it will be available in the next release, maybe this weekend. Of course, shift operators need no patch, because x << y == x * math.pow(2, y) and x >> y == math.floor(x / math.pow(2, y)).

Cool! That would solve most of my lua p-sprint problems at the same time.

[MikeHaggar]

Hmm... That hexadesimal stuff might be useful for my textreader ;)