Re: __bshr vs __bshl

[tobias@...]

> Not everything that uses << or >> is performing something analogous to
> a symmetric bit shift.
>
> C++ developers, for example, use it to mean insertion and extraction.
>
> I don't know off the top of my head if there are any popular Lua
> libraries that use the operators for asymmetric behaviors, but it
> wouldn't surprise me if LPeg were among them. (I haven't actually used
> it!)

When implementing Set functionality you can reuse operators nicely

[1,2,3,4] | [5,6,2,3]  = [1,2,3,4,5,6]   (union)
[1,2,3,4] & [5,6,2,3]  = [2,3]           (intersection)

If you take the metamethods out of math context it's really nice that all
of them are available.

 -tobbik