$x is()

in src/ChildValidation/private.hack [16:21]

• 6 lines of code
• 3 McCabe index (conditional complexity)

    $x is (int, int, mixed) &&
    $x[0] === XHPChild\LegacyExpressionType::EXACTLY_ONE &&
    $x[1] === XHPChild\LegacyConstraintType::EXPRESSION
  ) {
    return normalize($x[2]);
  }