X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Feclipse%2Fjdt%2Finternal%2Fcompiler%2Fast%2FThisReference.java;fp=src%2Forg%2Feclipse%2Fjdt%2Finternal%2Fcompiler%2Fast%2FThisReference.java;h=78ccdfa6e579ba8398a420ff062f17cf0e5d1809;hb=040fa5af2cd00017cf3575950cdaade34a6d7f6c;hp=0000000000000000000000000000000000000000;hpb=a580fb8376d315d05e4d6bfdff9ff1101a151cd6;p=org.ibex.tool.git

diff --git a/src/org/eclipse/jdt/internal/compiler/ast/ThisReference.java b/src/org/eclipse/jdt/internal/compiler/ast/ThisReference.java
new file mode 100644
index 0000000..78ccdfa
--- /dev/null
+++ b/src/org/eclipse/jdt/internal/compiler/ast/ThisReference.java
@@ -0,0 +1,120 @@
+/*******************************************************************************
+ * 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.FlowContext;
+import org.eclipse.jdt.internal.compiler.flow.FlowInfo;
+import org.eclipse.jdt.internal.compiler.lookup.*;
+
+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 org.eclipse.jdt.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 StringBuffer printExpression(int indent, StringBuffer output){
+	
+		if (this.isImplicitThis()) return output;
+		return output.append("this"); //$NON-NLS-1$
+	}
+
+	public TypeBinding resolveType(BlockScope scope) {
+	
+		constant = NotAConstant;
+		if (!this.isImplicitThis() &&!checkAccess(scope.methodScope())) {
+			return null;
+		}
+		return this.resolvedType = scope.enclosingSourceType();
+	}
+
+	public void traverse(ASTVisitor visitor, BlockScope blockScope) {
+
+		visitor.visit(this, blockScope);
+		visitor.endVisit(this, blockScope);
+	}
+}