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 c9730ea..e7fe6a0 100644 (file)
+/*******************************************************************************
+ * 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 v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
 package net.sourceforge.phpdt.internal.compiler.ast;
 
-import java.util.List;
+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;
 
-/**
- * @author Matthieu Casanova
- */
 public class LabeledStatement extends Statement {
 
-  public String label;
-
-  public Statement statement;
-
-  public LabeledStatement(final String label,
-                          final Statement statement,
-                          final int sourceStart,
-                          final int sourceEnd) {
-    super(sourceStart, sourceEnd);
-    this.label = label;
-    this.statement = statement;
-  }
-
-  /**
-   * Return the object into String.
-   * It should be overriden
-   * @return a String
-   */
-  public String toString() {
-    return label + statement.toString();
-  }
-
-  /**
-   * Return the object into String.
-   * @param tab how many tabs (not used here
-   * @return a String
-   */
-  public String toString(final int tab) {
-    return tabString(tab) + toString();
-  }
-
-    /**
-   * Get the variables from outside (parameters, globals ...)
-   * @return the variables from outside
-   */
-  public List getOutsideVariable() {
-    return statement.getOutsideVariable();
-  }
-
-  /**
-   * get the modified variables.
-   * @return the variables modified
-   */
-  public List getModifiedVariable() {
-    return statement.getModifiedVariable();
-  }
-
-  /**
-   * Get the variables used.
-   * @return the variables used
-   */
-  public List getUsedVariable() {
-    return statement.getUsedVariable();
-  }
+       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.
+               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);
+                       return mergedInfo;
+               }
+       }
+
+       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
+        *            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 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);
+               s += new String(label) + ": " + statement.toString(0); //$NON-NLS-1$
+               return s;
+       }
+
+       public void traverse(ASTVisitor visitor, BlockScope blockScope) {
+
+               if (visitor.visit(this, blockScope)) {
+                       statement.traverse(visitor, blockScope);
+               }
+               visitor.endVisit(this, blockScope);
+       }
+
+       public void resetStateForCodeGeneration() {
+               if (this.targetLabel != null) {
+                       this.targetLabel.resetStateForCodeGeneration();
+               }
+       }
 }