> On Feb 22, 2017, at 10:55 AM, Max Moiseev via swift-evolution
> <swift-evolution@swift.org> wrote:
>
>> default func multiplied(by other: Self) -> Self // `default` means try
>> resolving ambiguities with this version first. The overloaded versions are
>> only considered if the type-checker can’t make this version work.
>
> This feature is not strictly required in this case, as we moved away from
> using `multiplied` of type (Self, Self) -> Self to using proper `static func
> +`. So the ambiguity will *not* happen in the most common case when you want
> to multiply two numbers of some type and get the result of the same type.
> Ambiguity will only become a problem in what I believe to be a very less
> frequent case, when you want to do something very special, like, catch the
> overflow explicitly or get the full result in a form of DoubleWidth<T>.
True, but I think the only reason we're not using operators for the other
`multiplied` variants is that they need the third parameter. So we could
instead specify:
default static func * (lhs: Self, rhs: Self) -> Self
static func * (lhs: Self, rhs: Self) -> (partialValue: Self, overflow:
ArithmeticOverflow)
static func * (lhs: Self, rhs: Self) -> DoubleWidth<Self>
And not have to worry about these names at all.
(On the other hand, the reversed DoubleWidth division would still be a problem.
But isn't there a proposal in the works to add `\` to the operator characters?)
--
Brent Royal-Gordon
Architechies
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