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BEGIN LICENSE BLOCK ***** Version: CPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Common Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2007 Ola Bini <> Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the CPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the CPL, the GPL or the LGPL. END LICENSE BLOCK ***
 package org.jruby;
Placeholder until/if we can support this

Ola Bini
 public class RubyContinuation extends RubyObject {
     public static class Continuation extends Error implements Unrescuable {
         public Continuation() { = null;}
         public Continuation(IRubyObject tag) {
             this. = tag;
         public IRubyObject[] args = .;
         public final IRubyObject tag;
         public synchronized Throwable fillInStackTrace() {
             return this;
     private final Continuation continuation;
     private boolean disabled;
     public static void createContinuation(Ruby runtime) {
         RubyClass cContinuation = runtime.defineClass("Continuation",runtime.getObject(),runtime.getObject().getAllocator());
         cContinuation.index = .;
     public RubyContinuation(Ruby runtime) {
         this. = new Continuation();

A RubyContinuation used for catch/throw, which have a tag associated

runtime Current JRuby runtime
tag The tag to use
     public RubyContinuation(Ruby runtimeIRubyObject tag) {
         this. = new Continuation(tag);
     public Continuation getContinuation() {
         return ;
     @JRubyMethod(name = {"call""[]"}, rest = true)
     public IRubyObject call(ThreadContext contextIRubyObject[] args) {
         if () {
                     new IRubyObject[]{context.runtime.newString("continuations can not be called from outside their scope")},
        . = args;
        throw ;
    public IRubyObject enter(ThreadContext contextIRubyObject yieldedBlock block) {
        try {
            return block.yield(contextyielded);
        } catch (Continuation c) {
            if (c == ) {
                if (.. == 0) {
                    return context.runtime.getNil();
                } else if (.. == 1) {
                    return .[0];
                } else {
                    return context.runtime.newArrayNoCopy(.);
            } else {
                throw c;
        } finally {
             = true;
}// RubyContinuation
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