1) Moved net.sourceforge.phpeclipse.ui\src\net\sourceforge\phpdt back to net.sourcefo...
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / compiler / ast / LabeledStatement.java
index 8998f6b..e7fe6a0 100644 (file)
 /*******************************************************************************
- * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials 
- * are made available under the terms of the Common Public License v0.5 
+ * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v05.html
+ * http://www.eclipse.org/legal/cpl-v10.html
  * 
  * Contributors:
  *     IBM Corporation - initial API and implementation
- ******************************************************************************/
+ *******************************************************************************/
 package net.sourceforge.phpdt.internal.compiler.ast;
 
-import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
-import net.sourceforge.phpdt.internal.compiler.codegen.*;
-import net.sourceforge.phpdt.internal.compiler.flow.*;
-import net.sourceforge.phpdt.internal.compiler.lookup.*;
+import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
+import net.sourceforge.phpdt.internal.compiler.codegen.Label;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.flow.LabelFlowContext;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
 
 public class LabeledStatement extends Statement {
-       
+
        public Statement statement;
+
        public char[] label;
+
        public Label targetLabel;
 
        // for local variables table attributes
        int mergedInitStateIndex = -1;
-       
+
        /**
         * LabeledStatement constructor comment.
         */
        public LabeledStatement(char[] l, Statement st, int s, int e) {
-               
+
                this.statement = st;
                this.label = l;
                this.sourceStart = s;
                this.sourceEnd = e;
        }
-       
-       public FlowInfo analyseCode(
-               BlockScope currentScope,
-               FlowContext flowContext,
-               FlowInfo flowInfo) {
-
-               // need to stack a context to store explicit label, answer inits in case of normal completion merged
-               // with those relative to the exit path from break statement occurring inside the labeled statement.
+
+       public FlowInfo analyseCode(BlockScope currentScope,
+                       FlowContext flowContext, FlowInfo flowInfo) {
+
+               // need to stack a context to store explicit label, answer inits in case
+               // of normal completion merged
+               // with those relative to the exit path from break statement occurring
+               // inside the labeled statement.
                if (statement == null) {
                        return flowInfo;
                } else {
                        LabelFlowContext labelContext;
-                       FlowInfo mergedInfo =
-                               statement
-                                       .analyseCode(
-                                               currentScope,
-                                               (labelContext =
-                                                       new LabelFlowContext(
-                                                               flowContext,
-                                                               this,
-                                                               label,
-                                                               (targetLabel = new Label()),
-                                                               currentScope)),
-                                               flowInfo)
-                                       .mergedWith(labelContext.initsOnBreak);
-                       mergedInitStateIndex =
-                               currentScope.methodScope().recordInitializationStates(mergedInfo);
+                       FlowInfo mergedInfo = statement.analyseCode(
+                                       currentScope,
+                                       (labelContext = new LabelFlowContext(flowContext, this,
+                                                       label, (targetLabel = new Label()), currentScope)),
+                                       flowInfo).mergedWith(labelContext.initsOnBreak);
+                       mergedInitStateIndex = currentScope.methodScope()
+                                       .recordInitializationStates(mergedInfo);
                        return mergedInfo;
                }
        }
-       
-       public AstNode concreteStatement() {
-               
-               return statement.concreteStatement();
+
+       public ASTNode concreteStatement() {
+
+               // return statement.concreteStatement(); // for supporting nested
+               // labels: a:b:c: someStatement (see 21912)
+               return statement;
        }
-       
+
        /**
         * Code generation for labeled statement
-        *
+        * 
         * may not need actual source positions recording
-        *
-        * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
-        * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
+        * 
+        * @param currentScope
+        *            net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
+        * @param codeStream
+        *            net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
         */
-       public void generateCode(BlockScope currentScope, CodeStream codeStream) {
-               
-               int pc = codeStream.position;
-               if (targetLabel != null) {
-                       targetLabel.codeStream = codeStream;
-                       if (statement != null) {
-                               statement.generateCode(currentScope, codeStream);
-                       }
-                       targetLabel.place();
-               }
-               // May loose some local variable initializations : affecting the local variable attributes
-               if (mergedInitStateIndex != -1) {
-                       codeStream.removeNotDefinitelyAssignedVariables(
-                               currentScope,
-                               mergedInitStateIndex);
-               }
-               codeStream.recordPositionsFrom(pc, this.sourceStart);
+       // public void generateCode(BlockScope currentScope, CodeStream codeStream)
+       // {
+       //              
+       // int pc = codeStream.position;
+       // if (targetLabel != null) {
+       // targetLabel.codeStream = codeStream;
+       // if (statement != null) {
+       // statement.generateCode(currentScope, codeStream);
+       // }
+       // targetLabel.place();
+       // }
+       // // May loose some local variable initializations : affecting the local
+       // variable attributes
+       // if (mergedInitStateIndex != -1) {
+       // codeStream.removeNotDefinitelyAssignedVariables(
+       // currentScope,
+       // mergedInitStateIndex);
+       // }
+       // codeStream.recordPositionsFrom(pc, this.sourceStart);
+       // }
+       public StringBuffer printStatement(int tab, StringBuffer output) {
+
+               printIndent(tab, output).append(label).append(": "); //$NON-NLS-1$
+               if (this.statement == null)
+                       output.append(';');
+               else
+                       this.statement.printStatement(0, output);
+               return output;
        }
-       
+
        public void resolve(BlockScope scope) {
-               
+
                statement.resolve(scope);
        }
-       
+
        public String toString(int tab) {
 
                String s = tabString(tab);
@@ -109,9 +120,7 @@ public class LabeledStatement extends Statement {
                return s;
        }
 
-       public void traverse(
-               IAbstractSyntaxTreeVisitor visitor,
-               BlockScope blockScope) {
+       public void traverse(ASTVisitor visitor, BlockScope blockScope) {
 
                if (visitor.visit(this, blockScope)) {
                        statement.traverse(visitor, blockScope);
@@ -120,7 +129,8 @@ public class LabeledStatement extends Statement {
        }
 
        public void resetStateForCodeGeneration() {
-
-               this.targetLabel.resetStateForCodeGeneration();
+               if (this.targetLabel != null) {
+                       this.targetLabel.resetStateForCodeGeneration();
+               }
        }
-}
\ No newline at end of file
+}