gistfile1.txt

scala> case class Foo(x: Int, y: Boolean)
defined class Foo

scala> def foo(a: Foo) = a match { case Foo(x, y) => x }
foo: (a: Foo)Int

scala> :javap foo
  Size 902 bytes
  MD5 checksum 407f62b7f6559375f60f39b82fc98b9b
  Compiled from "<console>"
public class
  minor version: 0
  major version: 50
  flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
   #1 = Utf8
   #2 = Class              #1             //
   #3 = Utf8               java/lang/Object
   #4 = Class              #3             // java/lang/Object
   #5 = Utf8               <console>
   #6 = Utf8               MODULE$
   #7 = Utf8               L;
   #8 = Utf8               <clinit>
   #9 = Utf8               ()V
  #10 = Utf8               <init>
  #11 = NameAndType        #10:#9         // "<init>":()V
  #12 = Methodref          #2.#11         // ."<init>":()V
  #13 = Utf8               foo
  #14 = Utf8               (LFoo;)I
  #15 = Utf8               Foo
  #16 = Class              #15            // Foo
  #17 = Utf8               x
  #18 = Utf8               ()I
  #19 = NameAndType        #17:#18        // x:()I
  #20 = Methodref          #16.#19        // Foo.x:()I
  #21 = Utf8               scala/MatchError
  #22 = Class              #21            // scala/MatchError
  #23 = Utf8               (Ljava/lang/Object;)V
  #24 = NameAndType        #10:#23        // "<init>":(Ljava/lang/Object;)V
  #25 = Methodref          #22.#24        // scala/MatchError."<init>":(Ljava/lang/Object;)V
  #26 = Utf8               this
  #27 = Utf8               a
  #28 = Utf8               LFoo;
  #29 = Utf8               I
  #30 = Methodref          #4.#11         // java/lang/Object."<init>":()V
  #31 = NameAndType        #6:#7          // MODULE$:L;
  #32 = Fieldref           #2.#31         // .MODULE$:L;
  #33 = Utf8
  #34 = Class              #33            //
  #35 = Utf8               $line4/$read
  #36 = Class              #35            // $line4/$read
  #37 = Utf8
  #38 = Utf8
  #39 = Class              #38            //
  #40 = Utf8               $line3/$read
  #41 = Class              #40            // $line3/$read
  #42 = Utf8
  #43 = Class              #42            //
  #44 = Utf8               Foo
  #45 = Utf8               Code
  #46 = Utf8               LocalVariableTable
  #47 = Utf8               LineNumberTable
  #48 = Utf8               StackMapTable
  #49 = Utf8               SourceFile
  #50 = Utf8               InnerClasses
  #51 = Utf8               ScalaInlineInfo
  #52 = Utf8               Scala
{
  public static final  MODULE$;
    descriptor: L;
    flags: ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static {};
    descriptor: ()V
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: new           #2                  // class
         3: invokespecial #12                 // Method "<init>":()V
         6: return

  public int foo(Foo);
    descriptor: (LFoo;)I
    flags: ACC_PUBLIC
    Code:
      stack=3, locals=5, args_size=2
         0: aload_1
         1: astore_2
         2: aload_2
         3: ifnull        17
         6: aload_2
         7: invokevirtual #20                 // Method Foo.x:()I
        10: istore_3
        11: iload_3
        12: istore        4
        14: iload         4
        16: ireturn
        17: new           #22                 // class scala/MatchError
        20: dup
        21: aload_2
        22: invokespecial #25                 // Method scala/MatchError."<init>":(Ljava/lang/Object;)V
        25: athrow
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            0      26     0  this   L;
            0      26     1     a   LFoo;
           11      15     3     x   I
      LineNumberTable:
        line 13: 0
      StackMapTable: number_of_entries = 1
        frame_type = 252 /* append */
          offset_delta = 17
          locals = [ class Foo ]

  public ();
    descriptor: ()V
    flags: ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #30                 // Method java/lang/Object."<init>":()V
         4: aload_0
         5: putstatic     #32                 // Field MODULE$:L;
         8: return
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            0       9     0  this   L;
      LineNumberTable:
        line 17: 0
}
SourceFile: "<console>"
InnerClasses:
     public static #37= #34 of #36; //=class  of class $line4/$read
     public static #37= #39 of #41; //=class  of class $line3/$read
     public static #37= #2 of #34; //=class  of class
     public static #37= #43 of #39; //=class  of class
     public static #44= #16 of #43; //Foo=class Foo of class
Error: unknown attribute
  ScalaInlineInfo: length = 0xE
   01 01 00 02 00 0A 00 09 01 00 0D 00 0E 01
Error: unknown attribute
  Scala: length = 0x0