(In [21221]) Added support for Int and multi-string compiler switches (elideLevel, Yrecursion, plugin, disable, require, pluginOptions); some cleanup of compiler settings dialog (still pretty gross unfortunately); added support for continuations plugins (set 'P' setting to "continuations:enable"). Fixes #3184.

Fixed in [21221].

Closed As: fixed

OK, I set P to "continuations:enable", but the following code fragment generates an error

	  reset {
		  println(1)
		  shift { (cont: Unit => Unit) =>
		  	cont()
		  	cont()
		  	println(2)
		  }
		  println(3)
	  }

"not found: value reset"

Is there something I need to import? Also, I don't see continuations.jar in the libraries. Where do I find this?

you have to
import scala.util.continuations._
as reset and shift are def's of the package-object continuations.

Please feel free to add useful content like this to the wiki ... it's more likely to be found there than buried in a close ticket.

OK, now I get the following error

hello world
1
Exception in thread "main" java.lang.NoSuchMethodError: scala.util.continuations.package$.shift(Lscala/Function1;)Ljava/lang/Object;
	at HelloWorld$$anonfun$main$1.apply$mcV$sp(HelloWorld.scala:10)
	at HelloWorld$$anonfun$main$1.apply(HelloWorld.scala:8)
	at HelloWorld$$anonfun$main$1.apply(HelloWorld.scala:8)
	at scala.util.continuations.package$.reset(package.scala:20)
	at HelloWorld$.main(HelloWorld.scala:8)
	at HelloWorld.main(HelloWorld.scala)

Here is my application

object HelloWorld {
  import scala.util.continuations._
  
  def main(args : Array[String]) : Unit = {
	  println("hello world")
	  
	  reset {
		  println(1)
		  shift { (cont: Unit => Unit) =>
		  	cont()
		  	cont()
		  	println(2)
		  }
		  println(3)
	  }

  }
}

Do I need a the continuations.jar file, and where do I get it?

Are you running that from the command line or via an Eclipse launch?

Via Eclipse launch.

So, is there something wrong with the Scala support in Eclipse, or am I doing something wrong to cause this error? Should I be able to run the above program via Eclipse launch? Should this ticket be reopened?

Can someone please explain the problem I am having getting this simple example to work or cite me an example that does work in Eclipse.

Also, Eclipse is giving me the following error:
Description Resource Path Location Type
bad option: -P:continuations:enable Scala Sand Box Unknown Scala Problem

It worked all the time, now using http://download.scala-ide.org/update-current-35 the option does not work anymore!!
"bad option: -P:continuations:enable"

Please fix this ASAP, it worked all the time!

OK, now I am using http://download.scala-ide.org/nightly-update-helios-2.8.0.final under Eclipse 3.6.1

-P:continuations:enable still does not work (it hoses everything), and if it is not set I still get

Continuation Test
Exception in thread "main" java.lang.NoSuchMethodError: scala.util.continuations.package$.shift(Lscala/Function1;)Ljava/lang/Object;
at Continue$.foo$1(Continue.scala:10)
at Continue$.bar$1(Continue.scala:13)
at Continue$$anonfun$baz$1$1.apply$mcI$sp(Continue.scala:16)
at Continue$$anonfun$baz$1$1.apply(Continue.scala:16)
at Continue$$anonfun$baz$1$1.apply(Continue.scala:16)
at scala.util.continuations.package$.reset(package.scala:20)
at Continue$.baz$1(Continue.scala:16)
at Continue$.main(Continue.scala:18)
at Continue.main(Continue.scala)Once here.

Hmmm, I don't see a very bright future for continuations in Eclipse if people cannot make even the most simple examples work.

Updating tickets (#1000069, #1000195, #1000213, #1000223, #1000006, #1000021, #1000038, #1000048, #1000051, #1000052, #1000075, #1000103, #1000109, #1000115, #1000119, #1000156, #1000186, #1000207, #1000238, #1000262, #1000263, #380, #389, #683, #1238, #1331, #1635, #1645, #1715, #1729, #1744, #1783, #1839, #1869, #1885, #1890, #1902, #1918, #1919, #1924, #1925, #1946, #1964, #1991, #2131, #2233, #2342, #2348, #2408, #2459, #2499, #2523, #2572, #2582, #2602, #2614, #2615, #2675, #2710, #2745, #2763, #2816, #2830, #2834, #2878, #2879, #2887, #2888, #2901, #2911, #2912, #2922, #2937, #2938, #2942, #2951, #2955, #2957, #2961, #2964, #2965, #2974, #2975, #2989, #2990, #3002, #3055, #3070, #3087, #3135, #3139, #3173, #3182, #3184, #3200, #3213, #3214, #3221, #3243, #3251)

Closing as invalid.

I cannot reproduce the problem on both 2.0.0-2.9 and master-2.10. This has likely been fixed during 2.0 development.

Please reopen with additional information if you still see the problem.