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1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
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10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
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14  * Copyright (C) 2007 Thomas E Enebo <enebo@acm.org>
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28 package org.jruby.runtime;
29
30 import org.jruby.RubyModule;
31 import org.jruby.ast.Node;
32 import org.jruby.runtime.builtin.IRubyObject;
33 import org.jruby.util.collections.SinglyLinkedList;
34
35 /**
36  * Represents the live state of a for in construct in Ruby. This is different from an
37  * ordinary block in that it does not have its own scoped variables. It leeches those from
38  * the next outer scope. Because of this we do not set up, clone, nor tear down scope-related
39  * stuff. Also because of this we do not need to clone the block since it state does not change.
40  *
41  */
42 public class ForBlock extends Block {
43     private ForBlock(Node varNode, ICallable method, IRubyObject self, Frame frame,
44             SinglyLinkedList cref, Visibility visibility, RubyModule klass,
45             DynamicScope dynamicScope) {
46         super(varNode, method, self, frame, cref, visibility, klass, dynamicScope);
47     }
48     
49     public static Block createBlock(ThreadContext context, Node varNode, DynamicScope dynamicScope,
50             ICallable method, IRubyObject self) {
51         return new ForBlock(varNode, method, self,
52                 context.getCurrentFrame(),
53                 context.peekCRef(),
54                 context.getCurrentFrame().getVisibility(),
55                 context.getRubyClass(),
56                 dynamicScope);
57     }
58     
59     protected void pre(ThreadContext context, RubyModule klass) {
60         context.preForBlock(this, klass);
61     }
62     
63     public IRubyObject call(ThreadContext context, IRubyObject[] args, IRubyObject replacementSelf) {
64         return yield(context, context.getRuntime().newArrayNoCopy(args), null, null, true);
65     }
66     
67     public Block cloneBlock() {
68         return this;
69     }
70 }
71
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