It might be also useful to keep track of each one of these so we can make sure 
there are bugs for each one. (Even if it is a list that a script could create 
tickets). Many of the NSUnimplemented methods are good points to start 
contributing.

> On May 10, 2017, at 16:59, Sergej Jaskiewicz via swift-corelibs-dev 
> <swift-corelibs-dev@swift.org> wrote:
> 
> Well, here is what I got in IBM Swift Sandbox. 
> http://swift.sandbox.bluemix.net/#/repl/5913a8594ee0cd258050b2fd 
> <http://swift.sandbox.bluemix.net/#/repl/5913a8594ee0cd258050b2fd>
> If I got you right, it works.
> 
> Yes, partially implemented functions is a problem. But we definitely could 
> mark the ones that are not implemented at all and not being called.
> 
>> On 11 May 2017, at 02:43, Philippe Hausler <phaus...@apple.com 
>> <mailto:phaus...@apple.com>> wrote:
>> 
>> This of course is predicated upon availability macros working appropriately 
>> on linux (which last time I checked we don’t have a version variant). It is 
>> definitely worth investigation.
>> 
>>> On May 10, 2017, at 16:41, Tony Parker via swift-corelibs-dev 
>>> <swift-corelibs-dev@swift.org <mailto:swift-corelibs-dev@swift.org>> wrote:
>>> 
>>> Hi Sergej,
>>> 
>>> This is a good idea, but there are some additional things to consider. In 
>>> some cases, methods are partially unimplemented (with edge cases, or at 
>>> least less common cases remaining unfinished). The availability macro can’t 
>>> reflect that status.
>>> 
>>> In other cases, we want to partially implement one function but still call 
>>> through to an unimplemented function. The entire call may fail with the 
>>> assert, but at least we have part of the implementation in place.
>>> 
>>> - Tony
>>> 
>>>> On May 10, 2017, at 4:01 PM, Sergej Jaskiewicz via swift-corelibs-dev 
>>>> <swift-corelibs-dev@swift.org <mailto:swift-corelibs-dev@swift.org>> wrote:
>>>> 
>>>> I was wondering why cannot we just mark all the 
>>>> methods/properties/functions in Swift Foundation that are NSUnimplemented 
>>>> or call a subroutine that is NSUnimplemented like this:
>>>> 
>>>> @available(*, unavailable, message: “foo is not implemented yet”)
>>>> func foo() { NSUnimplemented() }
>>>> 
>>>> In this case we can be sure at compile time that we don’t use code that 
>>>> will definitely crash.
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>>>> https://lists.swift.org/mailman/listinfo/swift-corelibs-dev
>>> 
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> 
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