+1
Not symmetrical by default, but able to add an attribute/keyword to
auto-generate a default implementation which swaps the lhs & rhs.
> Hi, list!
>
> I’m thinking about proposal that would add a possibility to save some time on
> creating symmetrical binary operators.
>
> The latest code example from my math lib:
>
> @inline(__always)
> public static func *(lhs: Angle, rhs: Float) -> Angle {
> return Angle(lhs.degrees * rhs)
> }
>
> @inline(__always)
> public static func *(lhs: Float, rhs: Angle) -> Angle {
> return Angle(rhs.degrees * lhs)
> }
>
> The API of Angle doesn’t really matter here, what’s important is that I have
> to write another operator to make it symmetrical. Not so hard: 3 lines of
> code. It can even refer to original implementation, instead of duplicating
> the logic. But I think it would be nice to have something like symmetrical
> keyword, just like we have associativity and precedence.
>
> I also bet that all operators should be asymmetrical by default.
>
> Any thoughts?
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