[swift-evolution-announce] [Review] SE-0089: Replace protocol<P1, P2> syntax with Any<P1, P2>


(Thorsten Seitz) #1

I believe it was things like "+" and "-" for set union and subtraction, etc.

That, or &, |, and ^, by analogy with bitwise operators. It definitely came up during the SetAlgebra discussions.

Another thread I guess I didn’t follow closely enough. I think I agree with avoiding using unconventional operators for operations which already have conventional operators associated with them. Maybe someday it will be easy enough to type unicode operators that it might be reasonable to think about using them.

Yes, there is precedent in other languages:
Ceylon uses "&" for type intersection (any<>) and "|" for type union (one<>), see http://ceylon-lang.org/documentation/1.2/tour/types/.
TypeScript does the same (see https://www.typescriptlang.org/docs/handbook/advanced-types.html).

-Thorsten

···

Am 25. Mai 2016 um 03:07 schrieb Matthew Johnson via swift-evolution <swift-evolution@swift.org>:

On May 24, 2016, at 7:45 PM, Brent Royal-Gordon <brent@architechies.com> wrote:


(L Mihalkovic) #2

I believe it was things like "+" and "-" for set union and subtraction, etc.

That, or &, |, and ^, by analogy with bitwise operators. It definitely came up during the SetAlgebra discussions.

Another thread I guess I didn’t follow closely enough. I think I agree with avoiding using unconventional operators for operations which already have conventional operators associated with them. Maybe someday it will be easy enough to type unicode operators that it might be reasonable to think about using them.

Yes, there is precedent in other languages:
Ceylon uses "&" for type intersection (any<>) and "|" for type union (one<>), see http://ceylon-lang.org/documentation/1.2/tour/types/.
TypeScript does the same (see https://www.typescriptlang.org/docs/handbook/advanced-types.html).

Some great minds have said a lot of good things about typescript...

···

On May 25, 2016, at 12:29 PM, Thorsten Seitz via swift-evolution <swift-evolution@swift.org> wrote:

Am 25. Mai 2016 um 03:07 schrieb Matthew Johnson via swift-evolution <swift-evolution@swift.org>:

On May 24, 2016, at 7:45 PM, Brent Royal-Gordon <brent@architechies.com> wrote:

-Thorsten
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