[SR-2207] DispatchQoS.init(qosClass: DispatchQoS.QoSClass, relativePriority: Int) should have a default relative priority

[glessard]

Previous ID	SR-2207
Radar	None
Original Reporter	@glessard
Type	Improvement

Environment

Xcode 8 beta 3

Additional Detail from JIRA

Votes	0
Component/s	libdispatch
Labels	Improvement
Assignee	mww (JIRA)
Priority	Medium

md5: 0a7258f71072fa80ec0950f50cd68e37

Issue Description:

The rest of the new Dispatch overlay makes good use of defaults, but this parameter was passed over somehow. It would make sense to have a default of 0, that surely is the most commonly-passed parameter.

public struct DispatchQoS : Equatable {
    public init(qosClass: QoSClass, relativePriority: Int = 0) {
        self.qosClass = qosClass
        self.relativePriority = relativePriority
    }
}