common_function_protocol.swift

protocol A {
    var someVar: String { get set }
    func someFunc()
}
protocol B {
    var someVar: String { get set }
    func someFunc()
}
struct C: A, B {
    @_implements(A, someVar)
    var varFromA: String
    @_implements(A, someFunc())
    func someFuncFromA() {
        print("this is get someFuncFromA")
    }
    @_implements(B, someVar)
    var varFromB: String
    @_implements(B, someFunc())
    func someFuncFromB() {
        print("this is get someFuncFromB")
    }
}
let cInstance = C(varFromA: "var from A", varFromB: "var from B")
print(cInstance.varFromA)
print(cInstance.varFromB)
cInstance.someFuncFromA()
cInstance.someFuncFromB()