org.juniversal.translator.cplusplus.MethodDeclarationWriter Maven / Gradle / Ivy
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/*
* Copyright (c) 2012-2015, Microsoft Mobile
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.juniversal.translator.cplusplus;
import org.eclipse.jdt.core.dom.*;
import org.jetbrains.annotations.Nullable;
import org.juniversal.translator.core.ASTUtil;
import java.util.ArrayList;
import java.util.List;
public class MethodDeclarationWriter extends CPlusPlusASTNodeWriter {
public MethodDeclarationWriter(CPlusPlusSourceFileWriter cPlusPlusSourceFileWriter) {
super(cPlusPlusSourceFileWriter);
}
@Override
public void write(MethodDeclaration methodDeclaration) {
AbstractTypeDeclaration typeDeclaration = getContext().getTypeDeclaration();
// Get return type if present
@Nullable Type returnType = null;
if (!methodDeclaration.isConstructor())
returnType = methodDeclaration.getReturnType2();
// If we're writing the implementation of a generic method, include the "template<...>" prefix
List typeParameters = new ArrayList<>();
if (typeDeclaration instanceof TypeDeclaration) {
typeParameters = ((TypeDeclaration) typeDeclaration).typeParameters();
}
boolean isGeneric = !typeParameters.isEmpty();
if (isGeneric && getContext().isWritingMethodImplementation()) {
write("template ");
writeTypeParameters(typeParameters, true);
writeln();
}
// Writer static & virtual modifiers, in the class definition
if (!getContext().isWritingMethodImplementation()) {
if (ASTUtil.containsStatic(methodDeclaration.modifiers()))
write("static ");
else {
boolean isFinal = ASTUtil.containsFinal(typeDeclaration.modifiers())
|| ASTUtil.containsFinal(methodDeclaration.modifiers());
if (!isFinal)
write("virtual ");
}
}
// Skip any modifiers & type parameters in the source
setPositionToStartOfNode(returnType != null ? returnType : methodDeclaration.getName());
if (returnType != null)
writeNode(returnType);
copySpaceAndComments();
// TODO: Handle arrays with extra dimensions
if (getContext().isWritingMethodImplementation()) {
write(getContext().getTypeDeclaration().getName().getIdentifier());
if (isGeneric)
writeTypeParameters(typeParameters, false);
write("::");
}
matchAndWrite(methodDeclaration.getName().getIdentifier());
copySpaceAndComments();
writeParameterList(methodDeclaration);
writeThrownExceptions(methodDeclaration);
if (getContext().isWritingMethodImplementation())
writeSuperConstructorInvocation(methodDeclaration);
if (getContext().isWritingMethodImplementation()) {
copySpaceAndComments();
writeNode(methodDeclaration.getBody());
} else {
if (methodDeclaration.getBody() == null) {
write(" = 0");
copySpaceAndComments();
matchAndWrite(";");
} else {
skipSpaceAndComments();
write(";");
setPositionToEndOfNode(methodDeclaration);
}
}
}
private void writeParameterList(MethodDeclaration methodDeclaration) {
int additionalIndent = getTargetColumn() - getSourceLogicalColumn();
int previousAdditionalIndent = getTargetWriter().setAdditionalIndentation(additionalIndent);
matchAndWrite("(");
copySpaceAndComments();
writeCommaDelimitedNodes(methodDeclaration.parameters());
copySpaceAndComments();
matchAndWrite(")");
getTargetWriter().setAdditionalIndentation(previousAdditionalIndent);
}
private void writeThrownExceptions(MethodDeclaration methodDeclaration) {
// If there are any checked exceptions, output them just as a comment. We don't turn them
// into C++ checked exceptions because we don't declare runtime exceptions in the C++; since
// we don't declare all exceptions for C++ we can't declare any since we never want
// unexpected() to be called
List thrownExceptionTypes = methodDeclaration.thrownExceptionTypes();
boolean first;
if (thrownExceptionTypes.size() > 0) {
copySpaceAndComments();
write("/* ");
matchAndWrite("throws");
first = true;
for (Object exceptionTypeObject : thrownExceptionTypes) {
Type exceptionType = (Type) exceptionTypeObject;
skipSpaceAndComments();
if (first)
write(" ");
else {
matchAndWrite(",");
skipSpaceAndComments();
write(" ");
}
matchAndWrite(exceptionType.toString());
first = false;
}
write(" */");
}
}
@SuppressWarnings("unchecked")
private void writeSuperConstructorInvocation(MethodDeclaration methodDeclaration) {
Block body = methodDeclaration.getBody();
if (body == null)
return;
SuperConstructorInvocation superConstructorInvocation = null;
for (Statement statement : (List) body.statements()) {
if (statement instanceof SuperConstructorInvocation)
superConstructorInvocation = (SuperConstructorInvocation) statement;
break;
}
if (superConstructorInvocation == null)
return;
int originalPosition = getPosition();
setPositionToStartOfNode(superConstructorInvocation);
// TODO: Support .super
if (superConstructorInvocation.getExpression() != null)
throw sourceNotSupported(".super constructor invocation syntax not currently supported");
// TODO: Support type arguments here
if (!superConstructorInvocation.typeArguments().isEmpty())
throw sourceNotSupported("super constructor invocation with type arguments not currently supported");
write(" : ");
matchAndWrite("super");
copySpaceAndComments();
matchAndWrite("(");
List arguments = superConstructorInvocation.arguments();
boolean first = true;
for (Expression argument : (List) arguments) {
if (!first) {
copySpaceAndComments();
matchAndWrite(",");
}
copySpaceAndComments();
writeNode(argument);
first = false;
}
copySpaceAndComments();
matchAndWrite(")");
write(" ");
setPosition(originalPosition);
}
}