totally new file layout

[org.ibex.tool.git] / repo / org.ibex.tool / src / org / eclipse / jdt / internal / compiler / ast / LabeledStatement.java

diff --git a/repo/org.ibex.tool/src/org/eclipse/jdt/internal/compiler/ast/LabeledStatement.java b/repo/org.ibex.tool/src/org/eclipse/jdt/internal/compiler/ast/LabeledStatement.java
new file mode 100644 (file)
index 0000000..b24cde3
--- /dev/null
+++ b/repo/org.ibex.tool/src/org/eclipse/jdt/internal/compiler/ast/LabeledStatement.java
@@ -0,0 +1,129 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 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 org.eclipse.jdt.internal.compiler.ast;
+
+import org.eclipse.jdt.internal.compiler.ASTVisitor;
+import org.eclipse.jdt.internal.compiler.codegen.*;
+import org.eclipse.jdt.internal.compiler.flow.*;
+import org.eclipse.jdt.internal.compiler.lookup.*;
+
+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[] label, Statement statement, int sourceStart, int sourceEnd) {
+               
+               this.statement = statement;
+               // remember useful empty statement
+               if (statement instanceof EmptyStatement) statement.bits |= IsUsefulEmptyStatementMASK;
+               this.label = label;
+               this.sourceStart = sourceStart;
+               this.sourceEnd = sourceEnd;
+       }
+       
+       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 org.eclipse.jdt.internal.compiler.lookup.BlockScope
+        * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
+        */
+       public void generateCode(BlockScope currentScope, CodeStream codeStream) {
+               
+               int pc = codeStream.position;
+               if (targetLabel != null) {
+                       targetLabel.initialize(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.addDefinitelyAssignedVariables(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) {
+               
+               if (this.statement != null) {
+                       this.statement.resolve(scope);
+               }
+       }
+
+
+       public void traverse(
+               ASTVisitor visitor,
+               BlockScope blockScope) {
+
+               if (visitor.visit(this, blockScope)) {
+                       if (this.statement != null) this.statement.traverse(visitor, blockScope);
+               }
+               visitor.endVisit(this, blockScope);
+       }
+}