[swift-users] swift 4.0 "swift-version 4" errors with "type(of:"

David Hart david at hartbit.com
Fri May 19 17:05:53 CDT 2017


That's worrisome. type is such a common identifier that I worry its going to break a lot of code, create some confusion and force the un-esthetic qualifying.

> On 19 May 2017, at 21:38, Slava Pestov via swift-users <swift-users at swift.org> wrote:
> 
> Do you have a member named ‘type’ in the current scope?
> 
> We changed the behavior of type(of:) so that it behaves like a normal declaration in the Swift module instead of a special keyword. Unfortunately this means if you have a ‘type’ already visible in scope, you have to fully qualify Swift.type(of:).
> 
> Slava
> 
>> On May 19, 2017, at 11:18 AM, Edward Connell via swift-users <swift-users at swift.org> wrote:
>> 
>> When running the compiler using the "-swift-version 4" flag, the compiler complains about creating a dynamic type. Errors are flagged from within concrete base classes and also within protocol extensions.
>> 
>> error: cannot invoke 'type' with an argument list of type '(of: Self)'
>>                 let newObject = type(of: self).init()
>> 
>> Has this changed?? Are we supposed to create dynamic types a different way now?
>> 
>> Thanks, Ed
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