[swift-evolution] URL Literals

[Jonathan Hull]

+1 to Erica’s literal extensions (and Xiaodi’s idea of showing Favicons in Xcode where possible)

Perhaps the easiest way to allow arbitrary literal extensions beyond those would be, in phase 2 when we add RegEx to the language, to take a RegEx defining the custom literal and have the compiler output a tuple of other literal types (including array literals for ‘*’, etc...) to the init method as a result of parsing it.

It would actually be interesting to have the parsing via RegEx into literals as a general feature for parameters, and then the init syntax would fall out basically for free...

Thanks,
Jon


> On Dec 18, 2016, at 2:17 PM, Erica Sadun via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I'd prefer to see a literal URL than a Foundation URL that is string-initializable. I don't see a URL literal as being in any way necessarily tightly coupled with a Foundation URL type. The point of a literal is that it is inherently typeless and checked at compile time. A color literal depending on context can be a UIColor or NSColor but that's not specified outside of the use context. The code is portable and cross platform.
> 
> -- E
> 
> 
>> On Dec 17, 2016, at 10:18 PM, Xiaodi Wu via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> 
>> With respect to URL specifically, that it's a Foundation type may change the timeline as well. Various improvements to the Foundation API (and URL in particular) have been proposed here, but if I remember correctly, the stated goal was first to have a complete Swift version of Foundation, preserving the existing API as exactly as possible with no additions or subtractions, and only then to consider Swifty evolution of the APIs. I don't think the first step is complete yet.
>> 
>> On Sat, Dec 17, 2016 at 21:46 Step C via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> Probably worth pointing out that this topic seems entirely additive. Which means it would be at least a phase 2 proposal, if not later.
>> 
>> > On Dec 17, 2016, at 4:44 PM, Micah Hainline via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> >
>> > Yes, everyone who has what they feel like is a solid workable solution should write it up for URL and we can compare and pick holes in them all until we get something really solid.
>> >
>> >> On Dec 17, 2016, at 3:27 PM, David Sweeris <davesweeris at mac.com <mailto:davesweeris at mac.com>> wrote:
>> >>
>> >>
>> >>
>> >> Sent from my iPhone
>> >>
>> >>> On Dec 17, 2016, at 13:20, David Sweeris <davesweeris at mac.com <mailto:davesweeris at mac.com>> wrote:
>> >>>
>> >>>
>> >>>
>> >>> Sent from my iPhone
>> >>>
>> >>>> On Dec 17, 2016, at 13:12, Micah Hainline via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> >>>>
>> >>>> I'd love a fleshed out elegant example for URL that shows what a complete implementation of that special init method would look like.
>> >>>
>> >>> I can't do it now, but I'll try post one before tomorrow that shows how I'd envision it working.
>> >>
>> >> Oh, and to be clear, I'm not trying to "claim" this or anything... if anyone else has ideas, please post them! The more the merrier.
> 
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