Output multiple values inside functionCode metadata (C++)

[Tias]

Hi,

does anyone know how I could write a function in Haxe using the @:functionCode meta that's equivalent to the C++ function below? Or is there an easier alternative to modify multiple values from within a meta?

// C++
void modifyParams(float& a, float& b) {
   a = a * 2;
   b = b + 1;
}

// Haxe
class Foo {
   @:functionCode("
      // ???
   ")
   public static function modifyParams(a:Float, b:Float):Void {
      // How do I modify a and b?
   }
}

[Hugh]

You can to this with extern classes - but even then you have to be careful because haxe will generate temporary variables - and if you modify these instead of the real variable.  You can do this, though:

class Test
{
   public static function main()
   {
      var x = 10.0;
      modify( cpp.Pointer.addressOf(x) );
      trace(x);
   }

   public static function modify(xRef:cpp.Pointer<Float>)
   {
      xRef.ref = 20.0;
   }
}

Hugh