Functions should have clear throw statements. Functions with many throw statements can be harder to read and lead to confusion. Instead, prefer limiting the number of throw statements in a function.

Noncompliant Code

fun foo(i: Int) {
    when (i) {
        1 -> throw IllegalArgumentException()
        2 -> throw IllegalArgumentException()
        3 -> throw IllegalArgumentException()
    }
}

Compliant Code

fun foo(i: Int) {
    when (i) {
        1,2,3 -> throw IllegalArgumentException()
    }
}

Options

• max (default: 2)

  maximum amount of throw statements in a method

• excludeGuardClauses (default: False)

  if set to true, guard clauses do not count towards the allowed throws count