[SR-416] Automatic initializer inheritance doesn't work for generic types.

[swift-ci]

Previous ID	SR-416
Radar	rdar://problem/17960407
Original Reporter	AntiMoron (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Additional Detail from JIRA

Votes	8
Component/s	Compiler
Labels	Bug
Assignee	@slavapestov
Priority	Medium

md5: 653f63eac7d43989c4cea17dfc9d61f0

is duplicated by:

• SR-1375 Availability of default values in initializer or generics in class definition may prevent swift from inheritance of initializer.
• SR-924 Subclass of generic class has no initializers

Issue Description:

For such code:

public class A<T : Any> { 
    public init(n : Int) { 
        print("A")
    } 
} 
public class B : A<Int> {
}
let x = B(n: 123)

The two rules from documation have no effect.

Rule 1 “If your subclass doesn’t define any designated initializers, it automatically inherits all of its superclass designated initializers.”
Rule 2 “If your subclass provides an implementation of all of its superclass designated initializers—either by inheriting them as per rule 1, or by providing a custom implementation as part of its definition—then it automatically inherits all of the superclass convenience initializers.”

For more details see http://stackoverflow.com/questions/34525368/initializers-from-generic-types-wont-be-inherited-in-swift

[swift-ci]

Comment by Nikita Leonov (JIRA)

https://bugs.swift.org/browse/SR-1375 has some interesting observation regarding current behavior. Apparently default values in init preventing an initializer to be inherit in case of generic classes.

[slavapestov]

Fixed in master.