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opsb/gist:0081ce0a211b3f88e6510eafa4ba2198

Created May 25, 2020 18:39
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Map operation on a protocol in swift
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gistfile1.swift
public protocol Notifier {
associatedtype Event
init()
func send(_ : Event) -> Void
func map<ChildNotifier, ChildEvent>(_ : (Event) -> (ChildEvent)) -> ChildNotifier where ChildNotifier : Notifier, ChildNotifier.Event == ChildEvent
}
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