001 /* 002 $Id: BlockScope.java,v 1.4 2004/07/10 03:31:39 bran Exp $ 003 004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 package org.codehaus.groovy.classgen; 047 048 import org.objectweb.asm.Label; 049 050 /** 051 * A helper class to help maintain a stack of scopes for labels etc 052 * 053 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 054 * @version $Revision: 1.4 $ 055 */ 056 public class BlockScope { 057 058 059 // new scopes for methods do not have continue and break labels 060 // for, while, dowhile need to explicitly set the lables 061 // switch can break but not continue 062 private Label breakLabel = null; //new Label(); 063 private Label continueLabel = null; //new Label(); 064 private BlockScope parent; 065 private int firstVariableIndex = 0; 066 067 public BlockScope(BlockScope parent) { 068 this.parent = parent; 069 } 070 071 public Label getContinueLabel() { 072 return continueLabel; 073 } 074 075 public void setContinueLabel(Label continueLabel) { 076 this.continueLabel = continueLabel; 077 } 078 079 public Label getBreakLabel() { 080 return breakLabel; 081 } 082 083 public void setBreakLabel(Label breakLabel) { 084 this.breakLabel = breakLabel; 085 } 086 087 public BlockScope getParent() { 088 return parent; 089 } 090 091 public int getFirstVariableIndex() { 092 return firstVariableIndex; 093 } 094 095 public void setFirstVariableIndex(int firstVariableIndex) { 096 this.firstVariableIndex = firstVariableIndex; 097 } 098 099 /** 100 * 101 * @param firstVariableIndex 102 * @deprecated 103 */ 104 public void setLastVariableIndex(int firstVariableIndex) { 105 this.firstVariableIndex = firstVariableIndex; 106 } 107 108 public int getLastVariableIndex() { 109 return firstVariableIndex; 110 } 111 112 }