[xmlvm-dev] Scala and xmlvm2c / Method overloading

[Kensuke M. <mat...@ki...>]

Hi,

I tried to convert scala program, but segmentation fault occurred.
Does xmlvm2c support method overloading by return type?

A .class file has two method.
* public int call();
* public java.lang.Object call();

Generated callee .c source file has only "int call()",
but caller uses "java.lang.Object call()".

* test code *
package test {
import java.util.concurrent.Callable;

class Hoge extends Callable[Int] {
  def call() = 1
}

object Test {
  def callAndPrint(c: Callable[_]) {
    System.out.println(c.call());
  }
  def main(args: Array[String]) {
    callAndPrint(new Hoge);
  }
}
}

* result of javap -c *
Compiled from "Test.scala"
public class test.Hoge extends java.lang.Object implements java.util.concurrent.Callable,scala.ScalaObject{
public int call();
  Code:
   0:	iconst_1
   1:	ireturn

public java.lang.Object call();
  Code:
   0:	aload_0
   1:	invokevirtual	#11; //Method call:()I
   4:	invokestatic	#17; //Method scala/runtime/BoxesRunTime.boxToInteger:(I)Ljava/lang/Integer;
   7:	areturn

public test.Hoge();
  Code:
   0:	aload_0
   1:	invokespecial	#23; //Method java/lang/Object."<init>":()V
   4:	return

}

Compiled from "Test.scala"
public final class test.Test$ extends java.lang.Object implements scala.ScalaObject{
public static final test.Test$ MODULE$;

public static {};
  Code:
   0:	new	#9; //class test/Test$
   3:	invokespecial	#12; //Method "<init>":()V
   6:	return

public void callAndPrint(java.util.concurrent.Callable);
  Code:
   0:	getstatic	#20; //Field java/lang/System.out:Ljava/io/PrintStream;
   3:	aload_1
   4:	invokeinterface	#27,  1; //InterfaceMethod java/util/concurrent/Callable.call:()Ljava/lang/Object;
   9:	invokevirtual	#33; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V
   12:	return

public void main(java.lang.String[]);
  Code:
   0:	aload_0
   1:	new	#43; //class test/Hoge
   4:	dup
   5:	invokespecial	#44; //Method test/Hoge."<init>":()V
   8:	invokevirtual	#46; //Method callAndPrint:(Ljava/util/concurrent/Callable;)V
   11:	return

}
-- 
     松崎 憲介 (MATSUZAKI Kensuke)
  URL : http://www.kitec.co.jp/