6 magic sugars that can make your Kotlin codebase happier #11

Sugar.kt

fun access(contract: Contract,
           employee: Employee) = when (contract to employee) {
    PROBATION to SENIOR_ENGINEER,
    PROBATION to REGULAR_ENGINEER -> NotGranted(AssertionError("Access not allowed on probation contract."))
    PERMANENT to SENIOR_ENGINEER,
    PERMANENT to REGULAR_ENGINEER,
    PERMANENT to JUNIOR_ENGINEER,
    CONTRACTOR to SENIOR_ENGINEER -> Granted(DateTime(1))
    CONTRACTOR to REGULAR_ENGINEER,
    PROBATION to JUNIOR_ENGINEER,
    CONTRACTOR to JUNIOR_ENGINEER -> Blocked("Access for junior contractors is blocked.")
    else -> throw AssertionError("Unsupported case of $employee and $contract")
}