test.scala

package test

trait Ugh

class Test {
  def ugh = new Ugh {
    def blah: Int = 999
  }
}

class Main {
  def foo: Int = (new Test).ugh.blah
}

w.out

//scalac -Xprint:typer test.scala
[[syntax trees at end of                     typer]] // test.scala
package test {
  abstract trait Ugh extends scala.AnyRef;
  class Test extends scala.AnyRef {
    def <init>(): test.Test = {
      Test.super.<init>();
      ()
    };
    def ugh: test.Ugh{def blah: Int} = {
      final class $anon extends AnyRef with test.Ugh {
        def <init>(): anonymous class $anon = {
          $anon.super.<init>();
          ()
        };
        def blah: Int = 999
      };
      new $anon()
    }
  };
  class Main extends scala.AnyRef {
    def <init>(): test.Main = {
      Main.super.<init>();
      ()
    };
    def foo: Int = new Test().ugh.blah
  }
}

x.out

//javap -c -private test.Main
Compiled from "test.scala"
public class test.Main {
  private static java.lang.Class[] reflParams$Cache1;

  private static volatile java.lang.ref.SoftReference reflPoly$Cache1;

  public static {};
    Code:
       0: iconst_0      
       1: anewarray     #12                 // class java/lang/Class
       4: putstatic     #16                 // Field reflParams$Cache1:[Ljava/lang/Class;
       7: new           #18                 // class java/lang/ref/SoftReference
      10: dup           
      11: new           #20                 // class scala/runtime/EmptyMethodCache
      14: dup           
      15: invokespecial #23                 // Method scala/runtime/EmptyMethodCache."<init>":()V
      18: invokespecial #26                 // Method java/lang/ref/SoftReference."<init>":(Ljava/lang/Object;)V
      21: putstatic     #30                 // Field reflPoly$Cache1:Ljava/lang/ref/SoftReference;
      24: return        

  public static java.lang.reflect.Method reflMethod$Method1(java.lang.Class);
    Code:
       0: getstatic     #30                 // Field reflPoly$Cache1:Ljava/lang/ref/SoftReference;
       3: invokevirtual #36                 // Method java/lang/ref/SoftReference.get:()Ljava/lang/Object;
       6: checkcast     #38                 // class scala/runtime/MethodCache
       9: astore_1      
      10: aload_1       
      11: ifnonnull     33
      14: new           #20                 // class scala/runtime/EmptyMethodCache
      17: dup           
      18: invokespecial #23                 // Method scala/runtime/EmptyMethodCache."<init>":()V
      21: astore_1      
      22: new           #18                 // class java/lang/ref/SoftReference
      25: dup           
      26: aload_1       
      27: invokespecial #26                 // Method java/lang/ref/SoftReference."<init>":(Ljava/lang/Object;)V
      30: putstatic     #30                 // Field reflPoly$Cache1:Ljava/lang/ref/SoftReference;
      33: aload_1       
      34: aload_0       
      35: invokevirtual #41                 // Method scala/runtime/MethodCache.find:(Ljava/lang/Class;)Ljava/lang/reflect/Method;
      38: astore_2      
      39: aload_2       
      40: ifnull        45
      43: aload_2       
      44: areturn       
      45: getstatic     #47                 // Field scala/runtime/ScalaRunTime$.MODULE$:Lscala/runtime/ScalaRunTime$;
      48: aload_0       
      49: ldc           #49                 // String blah
      51: getstatic     #16                 // Field reflParams$Cache1:[Ljava/lang/Class;
      54: invokevirtual #53                 // Method java/lang/Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
      57: invokevirtual #57                 // Method scala/runtime/ScalaRunTime$.ensureAccessible:(Ljava/lang/reflect/Method;)Ljava/lang/reflect/Method;
      60: astore_2      
      61: new           #18                 // class java/lang/ref/SoftReference
      64: dup           
      65: aload_1       
      66: aload_0       
      67: aload_2       
      68: invokevirtual #61                 // Method scala/runtime/MethodCache.add:(Ljava/lang/Class;Ljava/lang/reflect/Method;)Lscala/runtime/MethodCache;
      71: invokespecial #26                 // Method java/lang/ref/SoftReference."<init>":(Ljava/lang/Object;)V
      74: putstatic     #30                 // Field reflPoly$Cache1:Ljava/lang/ref/SoftReference;
      77: aload_2       
      78: areturn       

  public int foo();
    Code:
       0: new           #75                 // class test/Test
       3: dup           
       4: invokespecial #76                 // Method test/Test."<init>":()V
       7: invokevirtual #80                 // Method test/Test.ugh:()Ltest/Ugh;
      10: astore_1      
      11: aload_1       
      12: invokevirtual #84                 // Method java/lang/Object.getClass:()Ljava/lang/Class;
      15: invokestatic  #86                 // Method reflMethod$Method1:(Ljava/lang/Class;)Ljava/lang/reflect/Method;
      18: aload_1       
      19: iconst_0      
      20: anewarray     #4                  // class java/lang/Object
      23: invokevirtual #90                 // Method java/lang/reflect/Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
      26: checkcast     #92                 // class java/lang/Integer
      29: invokestatic  #98                 // Method scala/runtime/BoxesRunTime.unboxToInt:(Ljava/lang/Object;)I
      32: ireturn       
      33: astore_2      
      34: aload_2       
      35: invokevirtual #102                // Method java/lang/reflect/InvocationTargetException.getCause:()Ljava/lang/Throwable;
      38: athrow        
    Exception table:
       from    to  target type
          11    26    33   Class java/lang/reflect/InvocationTargetException

  public test.Main();
    Code:
       0: aload_0       
       1: invokespecial #109                // Method java/lang/Object."<init>":()V
       4: return        
}