[swift-users] KeyedDecodingContainerProtocol decode methods non-mutating?

Can anybody tell why the decode methods in UnkeyedDecodingContainer are marked mutating but those in KeyedDecodingContainerProtocol and SingleValueDecodingContainer are not? Is it a simple oversight or is there a reason for this? It seems to me that all of them should be mutating. Thanks, Ingo ___

Re: [swift-users] C interop: passing null pointers to unwrapped unsafe pointers

Oh thanks, I fundamentally misunderstood how unwrapped optionals work. On Fri, Oct 7, 2016 at 6:25 PM, Joe Groff wrote: > >> On Oct 7, 2016, at 7:02 AM, Ingo Maier via swift-users >> wrote: >> >> Is there a way in Swift 3 to pass a null pointer to a C function

[swift-users] C interop: passing null pointers to unwrapped unsafe pointers

Is there a way in Swift 3 to pass a null pointer to a C function that takes an implicitly unwrapped unsafe pointer? I understand that pointer parameters in C that don't specify nullability are mapped to implicitly unwrapped pointers in Swift 3. Since it's not uncommon for existing unannotated C API

Re: [swift-users] Optional chaining and String properties

Yes, parenthesized expressions are primary expressions, which in turn are all postfix expressions as specified by the first grammar rule for postfix expressions and also the note you mentioned. I do think that swiftc's behavior is the most intuitive. I just think the spec needs to be clarified in t

Re: [swift-users] Optional chaining and String properties

If you are looking for the actual rules, they are defined in the language reference, in the section on optional chaining expressions [1]. It states that if you have an optional chaining expression of the form `expression?` then "If the value of the optional-chaining expression is nil, all of the o