> On May 24, 2016, at 12:00 AM, L. Mihalkovic <[email protected]> 
> wrote:
> 
> 
> 
>> On May 24, 2016, at 1:21 AM, Chris Lattner via swift-evolution 
>> <[email protected]> wrote:
>> 
>>> On May 23, 2016, at 2:17 AM, Jeremy Pereira via swift-evolution 
>>> <[email protected]> wrote:
>>> The collection model, API guidelines and standard library are actually 
>>> irrelevant to the ABI. The standard library API and the Swift ABI are 
>>> distinct orthogonal concepts.
>> 
>> I’m not sure what you’re saying.  If you change the API shipped by the 
>> standard library, it obviously breaks anything that links to it.
>> 
>> The whole point of ABI stability is to not break apps built with old 
>> versions of Swift compiler / standard library.

> I regularly read see how stability is a high prioriy goal going forward. But 
> what I have not found yet what the plan is going to be to achieve it without 
> stiffling the standard library? Are there constructs, or rules is 
> place/planned that map how changes of kind A versus B level changes will be 
> keeping/breaking compatibility? (I have not finished all the docs)

Once ABI stability is established, functionality can only be added to the 
standard library, not removed or have a significant behavior change.  For 
example, fundamentally changing the index model for collections would be 
impossible, but adding a new kind of collection would be fine.

-Chris
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