if_case.swift

if case .sugar = sugarcane.taste {              // if sugarcane.taste is `.sugar` then 
    print("yummmmy sugarcane")                  // enters into if
}
if case .salty(let value) = frenchFries.taste { // frenchFries.taste is .salty(10), so it matches
    if value < 10 {                             // the case and assign the value 10 to `value`
        print("manageable")                     // we can use the `value` inside the `if case`
    } else {
        print("impossible")
    }
}