+++ /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.codegen.Label;
-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.BlockScope;
-import net.sourceforge.phpdt.internal.compiler.lookup.ClassScope;
-import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
-import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
-import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
-
-public class AssertStatement extends Statement {
-
- public Expression assertExpression, exceptionArgument;
-
- // for local variable attribute
- int preAssertInitStateIndex = -1;
- private FieldBinding assertionSyntheticFieldBinding;
-
- public AssertStatement(
- Expression exceptionArgument,
- Expression assertExpression,
- int startPosition) {
-
- this.assertExpression = assertExpression;
- this.exceptionArgument = exceptionArgument;
- sourceStart = startPosition;
- sourceEnd = exceptionArgument.sourceEnd;
- }
-
- public AssertStatement(Expression assertExpression, int startPosition) {
-
- this.assertExpression = assertExpression;
- sourceStart = startPosition;
- sourceEnd = assertExpression.sourceEnd;
- }
-
- public FlowInfo analyseCode(
- BlockScope currentScope,
- FlowContext flowContext,
- FlowInfo flowInfo) {
-
- Constant constant = assertExpression.constant;
- if (constant != NotAConstant && constant.booleanValue() == true) {
- return flowInfo;
- }
-
- preAssertInitStateIndex = currentScope.methodScope().recordInitializationStates(flowInfo);
- FlowInfo assertInfo = flowInfo.copy();
-
- if (exceptionArgument != null) {
- assertInfo = exceptionArgument.analyseCode(
- currentScope,
- flowContext,
- assertExpression.analyseCode(currentScope, flowContext, assertInfo).unconditionalInits())
- .unconditionalInits();
- } else {
- assertInfo = assertExpression.analyseCode(currentScope, flowContext, assertInfo).unconditionalInits();
- }
-
- // assertion might throw AssertionError (unchecked), which can have consequences in term of
- // definitely assigned variables (depending on caught exception in the context)
- // DISABLED - AssertionError is unchecked, try statements are already protected against these.
- //flowContext.checkExceptionHandlers(currentScope.getJavaLangAssertionError(), this, assertInfo, currentScope);
-
- // only retain potential initializations
- flowInfo.addPotentialInitializationsFrom(assertInfo.unconditionalInits());
-
- // add the assert support in the clinit
- manageSyntheticAccessIfNecessary(currentScope);
-
- return flowInfo;
- }
-
- public void generateCode(BlockScope currentScope, CodeStream codeStream) {
-
- if ((bits & IsReachableMASK) == 0) {
- return;
- }
- int pc = codeStream.position;
-
- if (this.assertionSyntheticFieldBinding != null) {
- Label assertionActivationLabel = new Label(codeStream);
- codeStream.getstatic(this.assertionSyntheticFieldBinding);
- codeStream.ifne(assertionActivationLabel);
- Label falseLabel = new Label(codeStream);
- assertExpression.generateOptimizedBoolean(currentScope, codeStream, (falseLabel = new Label(codeStream)), null , true);
- codeStream.newJavaLangAssertionError();
- codeStream.dup();
- if (exceptionArgument != null) {
- exceptionArgument.generateCode(currentScope, codeStream, true);
- codeStream.invokeJavaLangAssertionErrorConstructor(exceptionArgument.implicitConversion & 0xF);
- } else {
- codeStream.invokeJavaLangAssertionErrorDefaultConstructor();
- }
- codeStream.athrow();
- falseLabel.place();
- assertionActivationLabel.place();
- }
-
- // May loose some local variable initializations : affecting the local variable attributes
- if (preAssertInitStateIndex != -1) {
- codeStream.removeNotDefinitelyAssignedVariables(currentScope, preAssertInitStateIndex);
- }
- codeStream.recordPositionsFrom(pc, this.sourceStart);
- }
-
- public void resolve(BlockScope scope) {
-
- assertExpression.resolveTypeExpecting(scope, BooleanBinding);
- if (exceptionArgument != null) {
- TypeBinding exceptionArgumentType = exceptionArgument.resolveType(scope);
- if (exceptionArgumentType != null){
- if (exceptionArgumentType.id == T_void){
- scope.problemReporter().illegalVoidExpression(exceptionArgument);
- }
- exceptionArgument.implicitConversion = (exceptionArgumentType.id << 4) + exceptionArgumentType.id;
- }
- }
- }
-
- public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
-
- if (visitor.visit(this, scope)) {
- assertExpression.traverse(visitor, scope);
- if (exceptionArgument != null) {
- exceptionArgument.traverse(visitor, scope);
- }
- }
- visitor.endVisit(this, scope);
- }
-
- public void manageSyntheticAccessIfNecessary(BlockScope currentScope) {
-
- // need assertion flag: $assertionsDisabled on outer most source type
- ClassScope outerMostClassScope = currentScope.outerMostClassScope();
- SourceTypeBinding sourceTypeBinding = outerMostClassScope.enclosingSourceType();
- this.assertionSyntheticFieldBinding = sourceTypeBinding.addSyntheticField(this, currentScope);
-
- // find <clinit> and enable assertion support
- TypeDeclaration typeDeclaration = outerMostClassScope.referenceType();
- AbstractMethodDeclaration[] methods = typeDeclaration.methods;
- for (int i = 0, max = methods.length; i < max; i++) {
- AbstractMethodDeclaration method = methods[i];
- if (method.isClinit()) {
- ((Clinit) method).addSupportForAssertion(assertionSyntheticFieldBinding);
- break;
- }
- }
- }
-
- public String toString(int tab) {
-
- StringBuffer buffer = new StringBuffer(tabString(tab));
- buffer.append("assert"); //$NON-NLS-1$
- buffer.append(this.assertExpression);
- if (this.exceptionArgument != null) {
- buffer.append(":"); //$NON-NLS-1$
- buffer.append(this.exceptionArgument);
- buffer.append(";"); //$NON-NLS-1$
- }
- return buffer.toString();
- }
-
-}
\ No newline at end of file
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