Refactored packagename to net.sourceforge.phpdt.internal.compiler.ast

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

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/ThisReference.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/ThisReference.java
new file mode 100644 (file)
index 0000000..38e2352
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/ThisReference.java
@@ -0,0 +1,127 @@
+/***********************************************************************************************************************************
+ * 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 net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
+
+public class ThisReference extends Reference {
+
+  public static ThisReference implicitThis() {
+
+    ThisReference implicitThis = new ThisReference(0, 0);
+    implicitThis.bits |= IsImplicitThisMask;
+    return implicitThis;
+  }
+
+  public ThisReference(int sourceStart, int sourceEnd) {
+
+    this.sourceStart = sourceStart;
+    this.sourceEnd = sourceEnd;
+  }
+
+  /*
+   * @see Reference#analyseAssignment(...)
+   */
+  public FlowInfo analyseAssignment(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, Assignment assignment,
+      boolean isCompound) {
+
+    return flowInfo; // this cannot be assigned
+  }
+
+  public boolean checkAccess(MethodScope methodScope) {
+
+    // this/super cannot be used in constructor call
+    if (methodScope.isConstructorCall) {
+      methodScope.problemReporter().fieldsOrThisBeforeConstructorInvocation(this);
+      return false;
+    }
+
+    // static may not refer to this/super
+    if (methodScope.isStatic) {
+      methodScope.problemReporter().errorThisSuperInStatic(this);
+      return false;
+    }
+    return true;
+  }
+
+  /*
+   * @see Reference#generateAssignment(...)
+   */
+  //   public void generateAssignment(BlockScope currentScope, CodeStream codeStream, Assignment assignment, boolean valueRequired) {
+  //
+  //            // this cannot be assigned
+  //   }
+  //
+  //   public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
+  //   
+  //           int pc = codeStream.position;
+  //           if (valueRequired)
+  //                   codeStream.aload_0();
+  //           if ((this.bits & IsImplicitThisMask) == 0) codeStream.recordPositionsFrom(pc, this.sourceStart);
+  //   }
+  //
+  //   /*
+  //    * @see Reference#generateCompoundAssignment(...)
+  //    */
+  //   public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int
+  // assignmentImplicitConversion, boolean valueRequired) {
+  //
+  //            // this cannot be assigned
+  //   }
+  //   
+  //   /*
+  //    * @see net.sourceforge.phpdt.internal.compiler.ast.Reference#generatePostIncrement()
+  //    */
+  //   public void generatePostIncrement(BlockScope currentScope, CodeStream codeStream, CompoundAssignment postIncrement, boolean
+  // valueRequired) {
+  //
+  //            // this cannot be assigned
+  //   }
+  public boolean isImplicitThis() {
+
+    return (this.bits & IsImplicitThisMask) != 0;
+  }
+
+  public boolean isThis() {
+
+    return true;
+  }
+
+  public TypeBinding resolveType(BlockScope scope) {
+
+    constant = NotAConstant;
+    if (!this.isImplicitThis() && !checkAccess(scope.methodScope()))
+      return null;
+    return this.resolvedType = scope.enclosingSourceType();
+  }
+
+  public StringBuffer printExpression(int indent, StringBuffer output) {
+
+    if (this.isImplicitThis())
+      return output;
+    return output.append("this"); //$NON-NLS-1$
+  }
+
+  public String toStringExpression() {
+
+    if (this.isImplicitThis())
+      return ""; //$NON-NLS-1$
+    return "this"; //$NON-NLS-1$
+  }
+
+  public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope blockScope) {
+
+    visitor.visit(this, blockScope);
+    visitor.endVisit(this, blockScope);
+  }
+}
\ No newline at end of file