+++ /dev/null
-/*******************************************************************************
- * 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.codegen.*;
-import org.eclipse.jdt.internal.compiler.flow.*;
-import org.eclipse.jdt.internal.compiler.impl.Constant;
-import org.eclipse.jdt.internal.compiler.lookup.*;
-import org.eclipse.jdt.internal.compiler.ASTVisitor;
-
-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) {
-
- preAssertInitStateIndex = currentScope.methodScope().recordInitializationStates(flowInfo);
-
- Constant cst = this.assertExpression.optimizedBooleanConstant();
- boolean isOptimizedTrueAssertion = cst != NotAConstant && cst.booleanValue() == true;
- boolean isOptimizedFalseAssertion = cst != NotAConstant && cst.booleanValue() == false;
-
- FlowInfo assertInfo = flowInfo.copy();
- if (isOptimizedTrueAssertion) {
- assertInfo.setReachMode(FlowInfo.UNREACHABLE);
- }
- assertInfo = assertExpression.analyseCode(currentScope, flowContext, assertInfo).unconditionalInits();
-
- if (exceptionArgument != null) {
- // only gets evaluated when escaping - results are not taken into account
- FlowInfo exceptionInfo = exceptionArgument.analyseCode(currentScope, flowContext, assertInfo.copy());
-
- if (!isOptimizedTrueAssertion){
- flowContext.checkExceptionHandlers(
- currentScope.getJavaLangAssertionError(),
- this,
- exceptionInfo,
- currentScope);
- }
- }
-
- if (!isOptimizedTrueAssertion){
- // add the assert support in the clinit
- manageSyntheticAccessIfNecessary(currentScope, flowInfo);
- }
- if (isOptimizedFalseAssertion) {
- return flowInfo; // if assertions are enabled, the following code will be unreachable
- } else {
- return flowInfo.mergedWith(assertInfo.unconditionalInits());
- }
- }
-
- 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);
- this.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){
- int id = exceptionArgumentType.id;
- switch(id) {
- case T_void :
- scope.problemReporter().illegalVoidExpression(exceptionArgument);
- default:
- id = T_Object;
- case T_boolean :
- case T_byte :
- case T_char :
- case T_short :
- case T_double :
- case T_float :
- case T_int :
- case T_long :
- case T_String :
- exceptionArgument.implicitConversion = (id << 4) + id;
- }
- }
- }
- }
-
- public void traverse(ASTVisitor 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, FlowInfo flowInfo) {
-
- if (!flowInfo.isReachable()) return;
-
- // need assertion flag: $assertionsDisabled on outer most source clas
- // (in case of static member of interface, will use the outermost static member - bug 22334)
- SourceTypeBinding outerMostClass = currentScope.enclosingSourceType();
- while (outerMostClass.isLocalType()){
- ReferenceBinding enclosing = outerMostClass.enclosingType();
- if (enclosing == null || enclosing.isInterface()) break;
- outerMostClass = (SourceTypeBinding) enclosing;
- }
-
- this.assertionSyntheticFieldBinding = outerMostClass.addSyntheticField(this, currentScope);
-
- // find <clinit> and enable assertion support
- TypeDeclaration typeDeclaration = outerMostClass.scope.referenceType();
- AbstractMethodDeclaration[] methods = typeDeclaration.methods;
- for (int i = 0, max = methods.length; i < max; i++) {
- AbstractMethodDeclaration method = methods[i];
- if (method.isClinit()) {
- ((Clinit) method).setAssertionSupport(assertionSyntheticFieldBinding);
- break;
- }
- }
- }
-
- public StringBuffer printStatement(int tab, StringBuffer output) {
-
- printIndent(tab, output);
- output.append("assert "); //$NON-NLS-1$
- this.assertExpression.printExpression(0, output);
- if (this.exceptionArgument != null) {
- output.append(": "); //$NON-NLS-1$
- this.exceptionArgument.printExpression(0, output);
- }
- return output.append(';');
- }
-
-}
projects / org.ibex.tool.git / blobdiff