Re: Implementing Interfaces:

[Nick Howard]

Hi,

Looks like you might have found a bug. Could you try compiling with --verbose and dumping the output in a gist/pastebin? It'd be helpful to have the full test.mirah file too.

On Mon, Oct 15, 2012 at 12:40 AM, Peter Ehrlich <peter.i...@gmail.com> wrote:

Hey -- new here to Java and to Mirah.  I'm experimenting with using it in combination with the LeJos project to control lego robotics.

Trying to implement this java code is giving me trouble.  Here's the spec from their tutorial:

Button.ENTER.addButtonListener(new ButtonListener() {
      public void buttonPressed(Button b) {
        LCD.drawString("ENTER pressed", 0, 0);
      }

      public void buttonReleased(Button b) {
        LCD.clear();
      }
    });

And here's my (failing) Mirah implementation.  Hopefully, there some dumb mistake that I just wouldn't think of:

class MyButtonListener

  implements ButtonListener

  def buttonPressed(b: Button):void

    LCD.drawString("ESC pressed", 0, 6)

  end

  def buttonReleased(b: Button):void

    LCD.drawString("ESC released", 0, 6)

  end

end

// and later:

listener = MyButtonListener.new

Button.ESCAPE.addButtonListener(listener)

It gives me the following error:

$ mirahc --java --classpath /Users/peter/Downloads/leJOS_NXJ_0.9.1beta-3/lib/nxt/classes.jar  test.mirah 

Parsing...

  test.mirah

Inferring types...

test.mirah:32: can't convert Mirah::JVM::Types::TypeDefinition into String

    Button.ESCAPE.addButtonListener(listener)

Mirah::InternalCompilerError: can't convert Mirah::JVM::Types::TypeDefinition into String

         infer at /Users/peter/.rvm/gems/jruby-1.6.7.2/gems/mirah-0.0.12-java/lib/mirah/typer/simple.rb:280

         infer at /Users/peter/.rvm/gems/jruby-1.6.7.2/gems/mirah-0.0.12-java/lib/mirah/typer/simple.rb:275

       resolve at /Users/peter/.rvm/gems/jruby-1.6.7.2/gems/mirah-0.0.12-java/lib/mirah/typer/simple.rb:324

          each at org/jruby/RubyHash.java:1186

See the full docs:

http://lejos.sourceforge.net/nxt/nxj/tutorial/ListenersAndEvents/Listeners_Events.htm

http://lejos.sourceforge.net/p_technologies/nxt/nxj/api/lejos/nxt/Button.html#addButtonListener(lejos.nxt.ButtonListener)

Cheers & Thanks for any help!

--Peter

--
-Nick Howard
http://blog.baroquebobcat.com/

[Peter Ehrlich]

You guys sure know how to do verbose! Here's the output and the source:

https://gist.github.com/3896867

Thanks for the help