+++ /dev/null
-/*******************************************************************************
- * 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.IAbstractSyntaxTreeVisitor;
-import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
-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 TypeBinding arrayElementBinding;
-
- 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(arrayElementBinding.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(arrayElementBinding.id);
- // Generating code for the potential runtime type checking
- if (valueRequired) {
- codeStream.generateImplicitConversion(implicitConversion);
- } else {
- if (arrayElementBinding == LongBinding
- || arrayElementBinding == 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(arrayElementBinding.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(arrayElementBinding.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(arrayElementBinding.id);
- if (valueRequired) {
- if ((arrayElementBinding == LongBinding)
- || (arrayElementBinding == DoubleBinding)) {
- codeStream.dup2_x2();
- } else {
- codeStream.dup_x2();
- }
- }
- codeStream.generateConstant(
- postIncrement.expression.constant,
- implicitConversion);
- codeStream.sendOperator(postIncrement.operator, arrayElementBinding.id);
- codeStream.generateImplicitConversion(
- postIncrement.assignmentImplicitConversion);
- codeStream.arrayAtPut(arrayElementBinding.id, false);
- }
-
- public TypeBinding resolveType(BlockScope scope) {
-
- constant = Constant.NotAConstant;
- TypeBinding arrayTb = receiver.resolveType(scope);
- if (arrayTb == null)
- return null;
- if (!arrayTb.isArrayType()) {
- scope.problemReporter().referenceMustBeArrayTypeAt(arrayTb, this);
- return null;
- }
- TypeBinding positionTb = position.resolveTypeExpecting(scope, IntBinding);
- if (positionTb == null)
- return null;
- position.implicitWidening(IntBinding, positionTb);
- return arrayElementBinding = ((ArrayBinding) arrayTb).elementsType(scope);
- }
-
- public String toStringExpression() {
-
- return receiver.toStringExpression() + "[" //$NON-NLS-1$
- +position.toStringExpression() + "]"; //$NON-NLS-1$
- }
-
- public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
-
- if (visitor.visit(this, scope)) {
- receiver.traverse(visitor, scope);
- position.traverse(visitor, scope);
- }
- visitor.endVisit(this, scope);
- }
-}
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