Xcode 7.0: Swift subclass of generic superclass doesn't automatically inherit initializer

Originator:kylealanhale
Number:rdar://22802130 Date Originated:22-Sep-2015 09:53 AM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode 7.0 (7A220)
Classification:Other Bug Reproducible:Always
 
Summary:
When subclassing a generic superclass, automatic initializer inheritance does not occur.

Steps to Reproduce:
Create a generic class with an initializer
Subclass it
Attempt to initialize subclass

Expected Results:
Subclass automatically inherits initializer and instantiates

Actual Results:
Compiler error: “…cannot be constructed because it has no accessible initializers”

Comments

Another repro

I stumbled upon this when subclassing with a generic argument from a non-generic class. I've also found that the error only occurs if the designated initializer takes any arguments.

Example: 

   class A {
       init(someData: AnyObject) {}
   }



class B<T> : A { }



class C {
       func someFunction() { var objB = B<Int>(5) } // error
   }

By johnhammerlund at March 8, 2016, 11:32 p.m. (reply...)

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