tuple.scala

scala> class Foo {
     | def p1[A, B](t: (A, B)): (Option[A], Option[B]) = {
     |   val (e1, e2) = t
     |   (Some(e1), Some(e2))
     | }
     | def p2[A, B](t: (A, B)): (Option[A], Option[B]) = {
     |   (Some(t._1), Some(t._2))
     | }
     | }
defined class Foo

scala> :javap -c Foo
Compiled from "<console>"
public class $line4.$read$$iw$$iw$Foo {
  public <A, B> scala.Tuple2<scala.Option<A>, scala.Option<B>> p1(scala.Tuple2<A, B>);
    Code:
       0: aload_1
       1: astore        4
       3: aload         4
       5: ifnull        37
       8: aload         4
      10: invokevirtual #22                 // Method scala/Tuple2._1:()Ljava/lang/Object;
      13: astore        5
      15: aload         4
      17: invokevirtual #25                 // Method scala/Tuple2._2:()Ljava/lang/Object;
      20: astore        6
      22: new           #18                 // class scala/Tuple2
      25: dup
      26: aload         5
      28: aload         6
      30: invokespecial #29                 // Method scala/Tuple2."<init>":(Ljava/lang/Object;Ljava/lang/Object;)V
      33: astore_2
      34: goto          50
      37: goto          40
      40: new           #31                 // class scala/MatchError
      43: dup
      44: aload         4
      46: invokespecial #34                 // Method scala/MatchError."<init>":(Ljava/lang/Object;)V
      49: athrow
      50: aload_2
      51: astore_3
      52: aload_3
      53: invokevirtual #22                 // Method scala/Tuple2._1:()Ljava/lang/Object;
      56: astore        7
      58: aload_3
      59: invokevirtual #25                 // Method scala/Tuple2._2:()Ljava/lang/Object;
      62: astore        8
      64: new           #18                 // class scala/Tuple2
      67: dup
      68: new           #36                 // class scala/Some
      71: dup
      72: aload         7
      74: invokespecial #37                 // Method scala/Some."<init>":(Ljava/lang/Object;)V
      77: new           #36                 // class scala/Some
      80: dup
      81: aload         8
      83: invokespecial #37                 // Method scala/Some."<init>":(Ljava/lang/Object;)V
      86: invokespecial #29                 // Method scala/Tuple2."<init>":(Ljava/lang/Object;Ljava/lang/Object;)V
      89: areturn

  public <A, B> scala.Tuple2<scala.Option<A>, scala.Option<B>> p2(scala.Tuple2<A, B>);
    Code:
       0: new           #18                 // class scala/Tuple2
       3: dup
       4: new           #36                 // class scala/Some
       7: dup
       8: aload_1
       9: invokevirtual #22                 // Method scala/Tuple2._1:()Ljava/lang/Object;
      12: invokespecial #37                 // Method scala/Some."<init>":(Ljava/lang/Object;)V
      15: new           #36                 // class scala/Some
      18: dup
      19: aload_1
      20: invokevirtual #25                 // Method scala/Tuple2._2:()Ljava/lang/Object;
      23: invokespecial #37                 // Method scala/Some."<init>":(Ljava/lang/Object;)V
      26: invokespecial #29                 // Method scala/Tuple2."<init>":(Ljava/lang/Object;Ljava/lang/Object;)V
      29: areturn

  public $line4.$read$$iw$$iw$Foo();
    Code:
       0: aload_0
       1: invokespecial #47                 // Method java/lang/Object."<init>":()V
       4: return
}