Swift Safe Unwrap Operators

example.swift

var value: String? = "test"

value <*> { print($0) } <> { print("value is nil") } // OUTPUT: test

value = nil

value <*> { print($0) } <> { print("value is nil") } // OUTPUT: value is nil

unwrapOperators.swift

precedencegroup UnwrapPrecedence {
    associativity: left
    higherThan: UnwrapNonexistencePrecedence
}

precedencegroup UnwrapNonexistencePrecedence {
    associativity: left
    higherThan: BitwiseShiftPrecedence
}

infix operator <*> : UnwrapPrecedence
func <*><T>(value: T?, codeUsing: (T) -> Void) -> T? {
    switch value {
    case .some(let wrapped): codeUsing(wrapped)
    case .none: break
    }
    return value
}

infix operator <> : UnwrapNonexistencePrecedence
func <><T>(value: T?, code: () -> Void) {
    switch value {
    case .some: break
    case .none: code()
    }
}