Protocol Conformance - Swift Programming

An extension can make an existing type conform to a protocol.

Add conformance separately

protocol_conformance.swift

protocol StatusLabel {
    func statusLabel() -> String
}

struct Build {
    let passed: Bool
}

extension Build: StatusLabel {
    func statusLabel() -> String {
        return passed ? "passed" : "failed"
    }
}

let passed = 
let build = Build(passed: passed)
let label = build.statusLabel()

print(label)

protocol StatusLabel {
    func statusLabel() -> String
}

struct Build {
    let passed: Bool
}

extension Build: StatusLabel {
    func statusLabel() -> String {
        return passed ? "passed" : "failed"
    }
}

let passed = 
let build = Build(passed: passed)
let label = build.statusLabel()

print(label)

extension conformance Protocol conformance can be declared in an extension when the required members fit better outside the original type declaration.