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Version: 0.5

DuplicatedCondition

A detector that finds duplicated conditions appearing in conditional expressions.

Why is it bad?​

Typically, these cases are developer errors caused by copy-pasting code, leading to unreachable code.

Example​

fun test(a: Int): Int {
  if (a < 1) { return 1; }
  else if (a > 4) { return 2; }
  // Bad: A developer copy-pasted the condition
  else if (a > 4) { return 3; }
  return 4;
}

Use instead:

fun test(a: Int): Int {
  if (a < 1) { return 1; }
  else if (a > 4) { return 2; }
  // OK: Fixed
  else if (a < x) { return 3; }
  return 4;
}