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/*******************************************************************************
* Copyright (c) 2009 Alena Laskavaia
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Alena Laskavaia - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.codan.checkers.sample;
import org.eclipse.cdt.codan.core.model.AbstractIndexAstChecker;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
import org.eclipse.cdt.core.dom.ast.IASTPointerOperator;
import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCatchHandler;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTReferenceOperator;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTTryBlockStatement;
/**
* @author Alena
*
*/
public class CatchUsesReference extends AbstractIndexAstChecker {
private static final String ER_ID = "org.eclipse.cdt.codan.checkers.sample.CatchUsesReference";
public void processAst(IASTTranslationUnit ast) {
// traverse the ast using the visitor pattern.
ast.accept(new OnCatch());
}
class OnCatch extends ASTVisitor {
OnCatch() {
shouldVisitStatements = true;
}
public int visit(IASTStatement stmt) {
if (stmt instanceof ICPPASTTryBlockStatement) {
ICPPASTTryBlockStatement tblock = (ICPPASTTryBlockStatement) stmt;
ICPPASTCatchHandler[] catchHandlers = tblock.getCatchHandlers();
for (int i = 0; i < catchHandlers.length; i++) {
ICPPASTCatchHandler catchHandler = catchHandlers[i];
if (usesReference(catchHandler)) {
reportProblem(ER_ID, catchHandler.getDeclaration(), "Catch clause uses reference in declaration of exception");
}
}
return PROCESS_SKIP;
}
return PROCESS_CONTINUE;
}
/**
* @param catchHandler
* @return
*/
private boolean usesReference(ICPPASTCatchHandler catchHandler) {
IASTDeclaration declaration = catchHandler.getDeclaration();
if (declaration instanceof IASTSimpleDeclaration) {
IASTDeclarator[] declarators = ((IASTSimpleDeclaration) declaration).getDeclarators();
for (int i = 0; i < declarators.length; i++) {
IASTDeclarator d = declarators[i];
IASTPointerOperator[] pointerOperators = d.getPointerOperators();
for (int j = 0; j < pointerOperators.length; j++) {
IASTPointerOperator po = pointerOperators[j];
if (po instanceof ICPPASTReferenceOperator) {
return true;
}
}
}
}
return false;
}
}
}
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