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

Adrian Zubarev adrian.zubarev at devandartist.com
Sun May 21 10:05:52 CDT 2017


Well, I think it’s a step forward by making type(of:) *like* a stdlib function. Now we need to change .Type and .Protocol syntax to something like Type<T>, AnyType<T> and also fix the way it behaves in a generic context to finally open up Type for custom type names. This should also help removing .self.

=)



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Adrian Zubarev
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Am 20. Mai 2017 um 00:42:27, David Hart via swift-users (swift-users at swift.org) schrieb:

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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