+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 
> <[email protected]> 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 
>> <[email protected] <mailto:[email protected]>> 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 
>> <[email protected] <mailto:[email protected]>> 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 
>> > <[email protected] <mailto:[email protected]>> 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 <[email protected] 
>> >> <mailto:[email protected]>> wrote:
>> >>
>> >>
>> >>
>> >> Sent from my iPhone
>> >>
>> >>> On Dec 17, 2016, at 13:20, David Sweeris <[email protected] 
>> >>> <mailto:[email protected]>> wrote:
>> >>>
>> >>>
>> >>>
>> >>> Sent from my iPhone
>> >>>
>> >>>> On Dec 17, 2016, at 13:12, Micah Hainline via swift-evolution 
>> >>>> <[email protected] <mailto:[email protected]>> 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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