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/*******************************************************************************
* Copyright (c) 2010, 2011 University of Applied Sciences Rapperswil (HSR).
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0 which
* accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Pascal Kesseli (HSR) - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.core.parser.tests.rewrite.astwriter;
import junit.framework.TestCase;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
import org.eclipse.cdt.core.dom.ast.IASTLiteralExpression;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclSpecifier;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCapture;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTFunctionDeclarator;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTLambdaExpression;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTCapture;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTCompoundStatement;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTDeclarator;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTFunctionDeclarator;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTLambdaExpression;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTLiteralExpression;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTName;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTParameterDeclaration;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTReturnStatement;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTSimpleDeclSpecifier;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTTypeId;
import org.eclipse.cdt.internal.core.dom.rewrite.astwriter.ASTWriterVisitor;
import org.eclipse.cdt.internal.core.dom.rewrite.commenthandler.NodeCommentMap;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class ExpressionWriterTest extends TestCase {
private static final String BR = System.getProperty("line.separator");
private static CPPASTSimpleDeclSpecifier INT = new CPPASTSimpleDeclSpecifier();
private static IASTName NO_NAME = new CPPASTName(new char[] {});
private NodeCommentMap commentMap = new NodeCommentMap();
private ASTVisitor visitor;
static {
INT.setType(IASTSimpleDeclSpecifier.t_int);
}
@Override
@Before
protected void setUp() throws Exception {
visitor = new ASTWriterVisitor(commentMap);
}
@Test
public void testWriteLambdaExpressionEmptyIntroducerNoDeclarator() throws Exception {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
lambda.accept(visitor);
String expected = "[] {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(expected, visitor.toString());
}
@Test
public void testWriteLambdaExpressionDefaultCaptureByCopyNoDeclarator() {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
lambda.setCaptureDefault(ICPPASTLambdaExpression.CaptureDefault.BY_COPY);
lambda.accept(visitor);
String expected = "[=] {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(expected, visitor.toString());
}
@Test
public void testWriteLambdaExpressionDefaultCaptureByReferenceNoDeclarator() {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
lambda.setCaptureDefault(ICPPASTLambdaExpression.CaptureDefault.BY_REFERENCE);
lambda.accept(visitor);
String expected = "[&] {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(expected, visitor.toString());
}
@Test
public void testWriteLambdaExpressionThisCaptureNoDeclarator() {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
CPPASTCapture thisCapture = new CPPASTCapture();
thisCapture.setIsByReference(true);
lambda.addCapture(thisCapture);
lambda.accept(visitor);
String expected = "[this] {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(expected, visitor.toString());
}
@Test
public void testWriteLambdaExpressionStarThisCaptureNoDeclarator() {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
lambda.addCapture(new CPPASTCapture());
lambda.accept(visitor);
String expected = "[*this] {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(expected, visitor.toString());
}
@Test
public void testWriteLambdaExpressionMixedCaptureNoDeclarator() {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
lambda.setCaptureDefault(ICPPASTLambdaExpression.CaptureDefault.BY_COPY);
CPPASTCapture thisCapture = new CPPASTCapture();
thisCapture.setIsByReference(true);
lambda.addCapture(thisCapture);
ICPPASTCapture x = new CPPASTCapture(), y = new CPPASTCapture();
x.setIdentifier(new CPPASTName(new char[] { 'x' }));
x.setIsByReference(true);
y.setIdentifier(new CPPASTName(new char[] { 'y' }));
lambda.addCapture(x);
lambda.addCapture(y);
lambda.accept(visitor);
String r = "[=, this, &x, y] {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(r, visitor.toString());
}
@Test
public void testWriteLambdaExpressionEmptyIntroducerSimpleDeclarator() throws Exception {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
lambda.setDeclarator(getSimpleFunctionDeclarator());
lambda.accept(visitor);
String r = "[](int i, int j) {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(r, visitor.toString());
}
@Test
public void testWriteLambdaExpressionEmptyIntroducerMutableDeclarator() throws Exception {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
ICPPASTFunctionDeclarator f = getSimpleFunctionDeclarator();
f.setMutable(true);
lambda.setDeclarator(f);
lambda.accept(visitor);
String r = "[](int i, int j) mutable {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(r, visitor.toString());
}
@Test
public void testWriteLambdaExpressionEmptyIntroducerExceptionSpecificationDeclarator() throws Exception {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
ICPPASTFunctionDeclarator f = getSimpleFunctionDeclarator();
f.addExceptionSpecificationTypeId(new CPPASTTypeId(INT, new CPPASTDeclarator(NO_NAME)));
lambda.setDeclarator(f);
lambda.accept(visitor);
String r = "[](int i, int j) throw (int) {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(r, visitor.toString());
}
@Test
public void testWriteLambdaExpressionEmptyIntroducerTrailingReturnTypeDeclarator() throws Exception {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
ICPPASTFunctionDeclarator f = getSimpleFunctionDeclarator();
f.setTrailingReturnType(new CPPASTTypeId(INT, new CPPASTDeclarator(NO_NAME)));
lambda.setDeclarator(f);
lambda.accept(visitor);
String r = "[](int i, int j) -> int {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(r, visitor.toString());
}
@Test
public void testWriteAllEmbracingLambdaExpression() {
ICPPASTLambdaExpression lambda = getEmptyLambdaExpression();
ICPPASTFunctionDeclarator f = getSimpleFunctionDeclarator();
lambda.setCaptureDefault(ICPPASTLambdaExpression.CaptureDefault.BY_REFERENCE);
ICPPASTCapture x = new CPPASTCapture(), y = new CPPASTCapture();
x.setIdentifier(new CPPASTName(new char[] { 'x' }));
y.setIdentifier(new CPPASTName(new char[] { 'y' }));
y.setIsByReference(true);
lambda.addCapture(x);
lambda.addCapture(y);
CPPASTCapture thisCapture = new CPPASTCapture();
thisCapture.setIsByReference(true);
lambda.addCapture(thisCapture);
f.setMutable(true);
f.setTrailingReturnType(new CPPASTTypeId(INT, new CPPASTDeclarator(NO_NAME)));
f.addExceptionSpecificationTypeId(new CPPASTTypeId(INT, new CPPASTDeclarator(NO_NAME)));
lambda.setDeclarator(f);
lambda.accept(visitor);
String r = "[&, x, &y, this](int i, int j) mutable throw (int) -> int {" + BR + " return 7;" + BR + "}" + BR;
Assert.assertEquals(r, visitor.toString());
}
private static ICPPASTFunctionDeclarator getSimpleFunctionDeclarator() {
ICPPASTFunctionDeclarator f = new CPPASTFunctionDeclarator(new CPPASTName());
IASTName name = new CPPASTName(new char[] { 'i' });
IASTDeclarator d = new CPPASTDeclarator(name);
f.addParameterDeclaration(new CPPASTParameterDeclaration(INT, d));
name = new CPPASTName(new char[] { 'j' });
d = new CPPASTDeclarator(name);
f.addParameterDeclaration(new CPPASTParameterDeclaration(INT, d));
return f;
}
private static ICPPASTLambdaExpression getEmptyLambdaExpression() {
ICPPASTLambdaExpression lambda = new CPPASTLambdaExpression();
CPPASTCompoundStatement stmt = new CPPASTCompoundStatement();
stmt.addStatement(new CPPASTReturnStatement(new CPPASTLiteralExpression(
IASTLiteralExpression.lk_integer_constant, new char[] { '7' })));
lambda.setBody(stmt);
return lambda;
}
}
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