optional3.swift

struct MyStruct: Emptyable, CustomStringConvertible {
    var name: String
    var isEmpty: Bool { return name.isEmpty }
    var description: String { return name }
    init(name: String) {
        self.name = name
    }
}
 
var myOptional: MyStruct? = nil
myOptional.orWhenNilOrEmpty(MyStruct(name:"Hello World")) //"Hello World"
 
myOptional = MyStruct(name: "")
myOptional.orWhenNilOrEmpty(MyStruct(name:"Hello World")) //"Hello World"
 
myOptional = MyStruct(name: "Yeah")
myOptional.orWhenNilOrEmpty(MyStruct(name:"Hello World")) //"Yeah"