--- /dev/null
+/*******************************************************************************
+ * 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.ASTVisitor;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.impl.Constant;
+import net.sourceforge.phpdt.internal.compiler.lookup.ArrayBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
+
+public class ArrayReference extends Reference {
+
+ public Expression receiver;
+ public Expression position;
+
+ public ArrayReference(Expression rec, Expression pos) {
+ this.receiver = rec;
+ this.position = pos;
+ sourceStart = rec.sourceStart;
+ }
+
+ public FlowInfo analyseAssignment(
+ BlockScope currentScope,
+ FlowContext flowContext,
+ FlowInfo flowInfo,
+ Assignment assignment,
+ boolean compoundAssignment) {
+
+ if (assignment.expression == null) {
+ return analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
+ } else {
+ return assignment
+ .expression
+ .analyseCode(
+ currentScope,
+ flowContext,
+ analyseCode(currentScope, flowContext, flowInfo).unconditionalInits())
+ .unconditionalInits();
+ }
+ }
+
+ public FlowInfo analyseCode(
+ BlockScope currentScope,
+ FlowContext flowContext,
+ FlowInfo flowInfo) {
+
+ return position.analyseCode(
+ currentScope,
+ flowContext,
+ receiver.analyseCode(currentScope, flowContext, flowInfo));
+ }
+
+// public void generateAssignment(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Assignment assignment,
+// boolean valueRequired) {
+//
+// receiver.generateCode(currentScope, codeStream, true);
+// position.generateCode(currentScope, codeStream, true);
+// assignment.expression.generateCode(currentScope, codeStream, true);
+// codeStream.arrayAtPut(this.resolvedType.id, valueRequired);
+// if (valueRequired) {
+// codeStream.generateImplicitConversion(assignment.implicitConversion);
+// }
+// }
+
+ /**
+ * Code generation for a array reference
+ */
+// public void generateCode(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// boolean valueRequired) {
+//
+// int pc = codeStream.position;
+// receiver.generateCode(currentScope, codeStream, true);
+// position.generateCode(currentScope, codeStream, true);
+// codeStream.arrayAt(this.resolvedType.id);
+// // Generating code for the potential runtime type checking
+// if (valueRequired) {
+// codeStream.generateImplicitConversion(implicitConversion);
+// } else {
+// if (this.resolvedType == LongBinding
+// || this.resolvedType == DoubleBinding) {
+// codeStream.pop2();
+// } else {
+// codeStream.pop();
+// }
+// }
+// codeStream.recordPositionsFrom(pc, this.sourceStart);
+// }
+//
+// public void generateCompoundAssignment(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Expression expression,
+// int operator,
+// int assignmentImplicitConversion,
+// boolean valueRequired) {
+//
+// receiver.generateCode(currentScope, codeStream, true);
+// position.generateCode(currentScope, codeStream, true);
+// codeStream.dup2();
+// codeStream.arrayAt(this.resolvedType.id);
+// int operationTypeID;
+// if ((operationTypeID = implicitConversion >> 4) == T_String) {
+// codeStream.generateStringAppend(currentScope, null, expression);
+// } else {
+// // promote the array reference to the suitable operation type
+// codeStream.generateImplicitConversion(implicitConversion);
+// // generate the increment value (will by itself be promoted to the operation value)
+// if (expression == IntLiteral.One) { // prefix operation
+// codeStream.generateConstant(expression.constant, implicitConversion);
+// } else {
+// expression.generateCode(currentScope, codeStream, true);
+// }
+// // perform the operation
+// codeStream.sendOperator(operator, operationTypeID);
+// // cast the value back to the array reference type
+// codeStream.generateImplicitConversion(assignmentImplicitConversion);
+// }
+// codeStream.arrayAtPut(this.resolvedType.id, valueRequired);
+// }
+//
+// public void generatePostIncrement(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// CompoundAssignment postIncrement,
+// boolean valueRequired) {
+//
+// receiver.generateCode(currentScope, codeStream, true);
+// position.generateCode(currentScope, codeStream, true);
+// codeStream.dup2();
+// codeStream.arrayAt(this.resolvedType.id);
+// if (valueRequired) {
+// if ((this.resolvedType == LongBinding)
+// || (this.resolvedType == DoubleBinding)) {
+// codeStream.dup2_x2();
+// } else {
+// codeStream.dup_x2();
+// }
+// }
+// codeStream.generateConstant(
+// postIncrement.expression.constant,
+// implicitConversion);
+// codeStream.sendOperator(postIncrement.operator, this.resolvedType.id);
+// codeStream.generateImplicitConversion(
+// postIncrement.assignmentImplicitConversion);
+// codeStream.arrayAtPut(this.resolvedType.id, false);
+// }
+ public StringBuffer printExpression(int indent, StringBuffer output) {
+
+ receiver.printExpression(0, output).append('[');
+ return position.printExpression(0, output).append(']');
+ }
+
+ public TypeBinding resolveType(BlockScope scope) {
+
+ constant = Constant.NotAConstant;
+ TypeBinding arrayType = receiver.resolveType(scope);
+ if (arrayType != null) {
+ if (arrayType.isArrayType()) {
+ this.resolvedType = ((ArrayBinding) arrayType).elementsType(scope);
+ } else {
+ scope.problemReporter().referenceMustBeArrayTypeAt(arrayType, this);
+ }
+ }
+ TypeBinding positionType = position.resolveTypeExpecting(scope, IntBinding);
+ if (positionType != null) {
+ position.implicitWidening(IntBinding, positionType);
+ }
+ return this.resolvedType;
+ }
+
+ public String toStringExpression() {
+
+ return receiver.toStringExpression() + "[" //$NON-NLS-1$
+ +position.toStringExpression() + "]"; //$NON-NLS-1$
+ }
+
+ public void traverse(ASTVisitor visitor, BlockScope scope) {
+
+ if (visitor.visit(this, scope)) {
+ receiver.traverse(visitor, scope);
+ position.traverse(visitor, scope);
+ }
+ visitor.endVisit(this, scope);
+ }
+}
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