first scanner /parser copied from the jdt java version

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / compiler / ast / Statement.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Statement.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Statement.java
new file mode 100644 (file)
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+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Statement.java
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v0.5 
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package net.sourceforge.phpdt.internal.compiler.ast;
+
+import net.sourceforge.phpdt.internal.compiler.impl.*;
+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.problem.*;
+import net.sourceforge.phpdt.internal.compiler.util.Util;
+
+public abstract class Statement extends AstNode {
+       
+       /**
+        * Statement constructor comment.
+        */
+       public Statement() {
+               super();
+       }
+       
+       public FlowInfo analyseCode(
+               BlockScope currentScope,
+               FlowContext flowContext,
+               FlowInfo flowInfo) {
+               return flowInfo;
+       }
+       
+       public void generateCode(BlockScope currentScope, CodeStream codeStream) {
+               throw new ShouldNotImplement(Util.bind("ast.missingStatement")); //$NON-NLS-1$
+       }
+       
+       public boolean isEmptyBlock() {
+               return false;
+       }
+       
+       public boolean isValidJavaStatement() {
+               //the use of this method should be avoid in most cases
+               //and is here mostly for documentation purpose.....
+               //while the parser is responsable for creating
+               //welled formed expression statement, which results
+               //in the fact that java-non-semantic-expression-used-as-statement
+               //should not be parsable...thus not being built.
+               //It sounds like the java grammar as help the compiler job in removing
+               //-by construction- some statement that would have no effect....
+               //(for example all expression that may do side-effects are valid statement
+               // -this is an appromative idea.....-)
+
+               return true;
+       }
+       
+       public void resolve(BlockScope scope) {
+       }
+       
+       public Constant resolveCase(
+               BlockScope scope,
+               TypeBinding testType,
+               SwitchStatement switchStatement) {
+               // statement within a switch that are not case are treated as normal statement.... 
+
+               resolve(scope);
+               return null;
+       }
+       
+       public void resetStateForCodeGeneration() {
+       }
+       
+       /**
+        * INTERNAL USE ONLY.
+        * Do nothing by default. This is used to redirect inter-statements jumps.
+        */
+       public void branchChainTo(Label label) {
+       }
+}
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