On Aug 16, 2014, at 6:32 AM, Gerriet M. Denkmann <gerr...@mdenkmann.de> wrote:

> How to translate into Swift:
> 
> - (void)myFunctionWithClass: (Class)someClass
> {
>       for(...)
>       {
>               p = ...
>               if ( p is not special ) continue;
> 
>               id <MyProtocol> aClass = [[ someClass alloc] initWithParameter: 
> p ];
>               ... do something with aClass ...
>       }
> }
> 
> Assuming that someClass is costly to initialize and myFunctionWithClass does 
> so only under certain circumstances.
> Or that myFunctionWithClass creates many instances of someClass.
> 
> Assuming also, that there is an unlimited number of classes (all implementing 
> MyProtocol).
> 
> Which means that there is no way that the caller of myFunctionWithClass could 
> create a someClass and pass it to the method.
> 
> How to do this in Swift?
> 
> Gerriet.

You can't. Swift does not have as many dynamic features as Objective-C.

Charles


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