ExpressibleByBooleanLiteral==.swift

struct Foo: ExpressibleByBooleanLiteral {
    var value: Bool
    init(booleanLiteral value: BooleanLiteralType) {
        self.value = value
    }
}

func ==(lhs: Foo, rhs: Foo) -> Bool {
    return lhs.value == rhs.value
}

let x = Foo(booleanLiteral: true)

if x == true {
    print("true")
} else {
    print("false")
}

prints "true" :)