GIT_REPOSITORIES/LPP/PythonQt Commit - r178:12aa9315d296

added destructor creation for shells...

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r178:12aa9315d296

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r178:12aa9315d296

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generator/shellheadergenerator.cpp +2 0

             /****************************************************************************
             **
             ** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
             ** All rights reserved.
             ** Contact: Nokia Corporation (qt-info@nokia.com)
             **
             ** This file is part of the Qt Script Generator project on Qt Labs.
             **
             ** $QT_BEGIN_LICENSE:LGPL$
             ** No Commercial Usage
             ** This file contains pre-release code and may not be distributed.
             ** You may use this file in accordance with the terms and conditions
             ** contained in the Technology Preview License Agreement accompanying
             ** this package.
             **
             ** GNU Lesser General Public License Usage
             ** Alternatively, this file may be used under the terms of the GNU Lesser
             ** General Public License version 2.1 as published by the Free Software
             ** Foundation and appearing in the file LICENSE.LGPL included in the
             ** packaging of this file.  Please review the following information to
             ** ensure the GNU Lesser General Public License version 2.1 requirements
             ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
             **
             ** In addition, as a special exception, Nokia gives you certain additional
             ** rights.  These rights are described in the Nokia Qt LGPL Exception
             ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
             **
             ** If you have questions regarding the use of this file, please contact
             ** Nokia at qt-info@nokia.com.
             **
             **
             **
             **
             **
             **
             **
             **
             ** $QT_END_LICENSE$
             **
             ****************************************************************************/
             #include "shellheadergenerator.h"
             #include "fileout.h"
             #include <QtCore/QDir>
             #include <qdebug.h>
             QString ShellHeaderGenerator::fileNameForClass(const AbstractMetaClass *meta_class) const
             {
               return QString("PythonQtWrapper_%1.h").arg(meta_class->name());
             }
             void ShellHeaderGenerator::writeFieldAccessors(QTextStream &s, const AbstractMetaField *field)
             {
               const AbstractMetaFunction *setter = field->setter();
               const AbstractMetaFunction *getter = field->getter();
               // static fields are not supported (yet?)
               if (setter->isStatic()) return;
               // Uuid data4 did not work (TODO: move to typesystem...(
               if (field->enclosingClass()->name()=="QUuid" &&  setter->name()=="data4") return;
               if (field->enclosingClass()->name()=="QIPv6Address") return;
               if (!field->type()->isConstant()) {
                 writeFunctionSignature(s, setter, 0, QString(),
                                        Option(ConvertReferenceToPtr | FirstArgIsWrappedObject| IncludeDefaultExpression | ShowStatic | UnderscoreSpaces));
                 s << "{ theWrappedObject->" << field->name() << " = " << setter->arguments()[0]->argumentName() << "; }\n";
               }
               writeFunctionSignature(s, getter, 0, QString(),
                                      Option(ConvertReferenceToPtr | FirstArgIsWrappedObject| IncludeDefaultExpression | OriginalName | ShowStatic | UnderscoreSpaces));
               s << "{ return theWrappedObject->" << field->name() << "; }\n";
             }
             void ShellHeaderGenerator::write(QTextStream &s, const AbstractMetaClass *meta_class)
             {
               QString builtIn = ShellGenerator::isBuiltIn(meta_class->name())?"_builtin":"";
               QString pro_file_name = meta_class->package().replace(".", "_") + builtIn + "/" + meta_class->package().replace(".", "_") + builtIn + ".pri";
               priGenerator->addHeader(pro_file_name, fileNameForClass(meta_class));
               setupGenerator->addClass(meta_class->package().replace(".", "_") + builtIn, meta_class);
               QString include_block = "PYTHONQTWRAPPER_" + meta_class->name().toUpper() + "_H";
               s << "#ifndef " << include_block << endl
                 << "#define " << include_block << endl << endl;
               Include inc = meta_class->typeEntry()->include();
               ShellGenerator::writeInclude(s, inc);
               s << "#include <QObject>" << endl << endl;
               s << "#include <PythonQt.h>" << endl << endl;
               IncludeList list = meta_class->typeEntry()->extraIncludes();
               qSort(list.begin(), list.end());
               foreach (const Include &inc, list) {
                 ShellGenerator::writeInclude(s, inc);
               }
               s << endl;
               AbstractMetaFunctionList ctors = meta_class->queryFunctions(AbstractMetaClass::Constructors
                 | AbstractMetaClass::WasVisible
                 | AbstractMetaClass::NotRemovedFromTargetLang);
               // Shell-------------------------------------------------------------------
               if (meta_class->generateShellClass()) {
                 AbstractMetaFunctionList virtualsForShell = getVirtualFunctionsForShell(meta_class);
                 s << "class " << shellClassName(meta_class)
                   << " : public " << meta_class->qualifiedCppName() << endl << "{" << endl;
                 s << "public:" << endl;
                 foreach(AbstractMetaFunction* fun, ctors) {
                   s << "    ";
                   writeFunctionSignature(s, fun, 0,"PythonQtShell_",
                     Option(IncludeDefaultExpression | OriginalName | ShowStatic | UnderscoreSpaces));
                   s << ":" << meta_class->qualifiedCppName() << "(";
                   QString scriptFunctionName = fun->originalName();
                   AbstractMetaArgumentList args = fun->arguments();
                   for (int i = 0; i < args.size(); ++i) {
                     if (i > 0)
                       s << ", ";
                     s << args.at(i)->argumentName();
                   }
                   s << "),_wrapper(NULL) {};" << endl;
                 }
                 s << endl;
+                s << "   ~" << shellClassName(meta_class) << "();" << endl;
+                s << endl;
                 foreach(AbstractMetaFunction* fun, virtualsForShell) {
                   s << "virtual ";
                   writeFunctionSignature(s, fun, 0, QString(),
                     Option(IncludeDefaultExpression | OriginalName | ShowStatic | UnderscoreSpaces));
                   s << ";" << endl;
                 }
                 s << endl;
                 s << "  PythonQtInstanceWrapper* _wrapper; " << endl;
                 s << "};" << endl << endl;
               }
               // Promoter-------------------------------------------------------------------
               AbstractMetaFunctionList promoteFunctions = getProtectedFunctionsThatNeedPromotion(meta_class);
               if (!promoteFunctions.isEmpty()) {
                 s << "class " << promoterClassName(meta_class)
                   << " : public " << meta_class->qualifiedCppName() << endl << "{ public:" << endl;
                 foreach(AbstractMetaFunction* fun, promoteFunctions) {
                   s << "inline ";
                   writeFunctionSignature(s, fun, 0, "promoted_",
                     Option(IncludeDefaultExpression | OriginalName | ShowStatic | UnderscoreSpaces));
                   s << " { ";
                   QString scriptFunctionName = fun->originalName();
                   AbstractMetaArgumentList args = fun->arguments();
                   if (fun->type())
                     s << "return ";
                   s << meta_class->qualifiedCppName() << "::";
                   s << fun->originalName() << "(";
                   for (int i = 0; i < args.size(); ++i) {
                     if (i > 0)
                       s << ", ";
                     s << args.at(i)->argumentName();
                   }
                   s << "); }" << endl;
                 }
                 s << "};" << endl << endl;
               }
               // Wrapper-------------------------------------------------------------------
               s << "class " << wrapperClassName(meta_class)
                 << " : public QObject" << endl
                 << "{ Q_OBJECT" << endl;
               s << "public:" << endl;
               AbstractMetaEnumList enums1 = meta_class->enums();
               AbstractMetaEnumList enums;
               QList<FlagsTypeEntry*> flags;
               foreach(AbstractMetaEnum* enum1, enums1) {
                 // catch gadgets and enums that are not exported on QObjects...
                 if (enum1->wasPublic() && (!meta_class->isQObject() || !enum1->hasQEnumsDeclaration())) {
                   enums << enum1;
                   if (enum1->typeEntry()->flags()) {
                     flags << enum1->typeEntry()->flags();
                   }
                 }
               }
               if (enums.count()) {
                 s << "Q_ENUMS(";
                 foreach(AbstractMetaEnum* enum1, enums) {
                   s << enum1->name() << " ";
                 }
                 s << ")" << endl;
                 if (flags.count()) {
                   s << "Q_FLAGS(";
                   foreach(FlagsTypeEntry* flag1, flags) {
                     QString origName = flag1->originalName();
                     int idx = origName.lastIndexOf("::");
                     if (idx!= -1) {
                       origName = origName.mid(idx+2);
                     }
                     s << origName << " ";
                   }
                   s << ")" << endl;
                 }
                 foreach(AbstractMetaEnum* enum1, enums) {
                   s << "enum " << enum1->name() << "{" << endl;
                   bool first = true;
                   foreach(AbstractMetaEnumValue* value, enum1->values()) {
                     if (first) { first = false; }
                     else { s << ", "; }
                     s << "  " << value->name() << " = " << meta_class->qualifiedCppName() << "::" << value->name();
                   }
                   s << "};" << endl;
                 }
                 if (flags.count()) {
                   foreach(AbstractMetaEnum* enum1, enums) {
                     if (enum1->typeEntry()->flags()) {
                       QString origName = enum1->typeEntry()->flags()->originalName();
                       int idx = origName.lastIndexOf("::");
                       if (idx!= -1) {
                         origName = origName.mid(idx+2);
                       }
                       s << "Q_DECLARE_FLAGS("<< origName << ", " << enum1->name() <<")"<<endl;
                     }
                   }
                 }
               }
               s << "public slots:" << endl;
               if (meta_class->generateShellClass() || !meta_class->isAbstract()) {
                 bool copyConstructorSeen = false;
                 bool defaultConstructorSeen = false;
                 foreach (const AbstractMetaFunction *fun, ctors) {
                   if (!fun->isPublic() || fun->isAbstract()) { continue; }
                   s << meta_class->qualifiedCppName() << "* ";
                   writeFunctionSignature(s, fun, 0, "new_",
                     Option(IncludeDefaultExpression | OriginalName | ShowStatic));
                   s << ";" << endl;
                   if (fun->arguments().size()==1 && meta_class->qualifiedCppName() == fun->arguments().at(0)->type()->typeEntry()->qualifiedCppName()) {
                     copyConstructorSeen = true;
                   }
                   if (fun->arguments().size()==0) {
                     defaultConstructorSeen = true;
                   }
                 }
                 if (meta_class->typeEntry()->isValue()
                     && !copyConstructorSeen && defaultConstructorSeen) {
                   QString className = meta_class->generateShellClass()?shellClassName(meta_class):meta_class->qualifiedCppName();
                   s << meta_class->qualifiedCppName() << "* new_" << meta_class->name() << "(const " << meta_class->qualifiedCppName() << "& other) {" << endl;
                   s << className << "* a = new " << className << "();" << endl;
                   s << "*((" << meta_class->qualifiedCppName() << "*)a) = other;" << endl;
                   s << "return a; }" << endl;
                 }
               }
               if (meta_class->hasPublicDestructor() && !meta_class->isNamespace()) {
                 s << "void delete_" << meta_class->name() << "(" << meta_class->qualifiedCppName() << "* obj) { delete obj; } ";
                 s << endl;
               }
               if (meta_class->name()=="QTreeWidgetItem") {
                 s << "bool py_hasOwner(QTreeWidgetItem* theWrappedObject) { return theWrappedObject->treeWidget()!=NULL || theWrappedObject->parent()!=NULL; }" << endl;
               } else if (meta_class->name()=="QGraphicsItem") {
                 s << "bool py_hasOwner(QGraphicsItem* theWrappedObject) { return theWrappedObject->scene()!=NULL || theWrappedObject->parentItem()!=NULL; }" << endl;
               }
               AbstractMetaFunctionList functions = getFunctionsToWrap(meta_class);
               foreach (const AbstractMetaFunction *function, functions) {
                 if (!function->isSlot() || function->isVirtual()) {
                   s << "   ";
                   writeFunctionSignature(s, function, 0, QString(),
                     Option(ConvertReferenceToPtr | FirstArgIsWrappedObject| IncludeDefaultExpression | OriginalName | ShowStatic | UnderscoreSpaces));
                   s << ";" << endl;
                 }
               }
               if (meta_class->hasDefaultToStringFunction() || meta_class->hasToStringCapability()) {
                 s << "    QString py_toString(" << meta_class->qualifiedCppName() << "*);" << endl;
               }
               if (meta_class->hasDefaultIsNull()) {
                 s << "    bool __nonzero__(" << meta_class->qualifiedCppName() << "* obj) { return !obj->isNull(); }" << endl;
               }
               // Field accessors
               foreach (const AbstractMetaField *field, meta_class->fields()) {
                 if (field->isPublic()) {
                   writeFieldAccessors(s, field);
                 }
               }
               writeInjectedCode(s, meta_class);
               s  << "};" << endl << endl
                 << "#endif // " << include_block << endl;
             }
             void ShellHeaderGenerator::writeInjectedCode(QTextStream &s, const AbstractMetaClass *meta_class)
             {
               CodeSnipList code_snips = meta_class->typeEntry()->codeSnips();
               foreach (const CodeSnip &cs, code_snips) {
                 if (cs.language == TypeSystem::PyWrapperDeclaration) {
                   s << cs.code() << endl;
                 }
               }
             }

generator/shellimplgenerator.cpp +6 0

             /****************************************************************************
             **
             ** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
             ** All rights reserved.
             ** Contact: Nokia Corporation (qt-info@nokia.com)
             **
             ** This file is part of the Qt Script Generator project on Qt Labs.
             **
             ** $QT_BEGIN_LICENSE:LGPL$
             ** No Commercial Usage
             ** This file contains pre-release code and may not be distributed.
             ** You may use this file in accordance with the terms and conditions
             ** contained in the Technology Preview License Agreement accompanying
             ** this package.
             **
             ** GNU Lesser General Public License Usage
             ** Alternatively, this file may be used under the terms of the GNU Lesser
             ** General Public License version 2.1 as published by the Free Software
             ** Foundation and appearing in the file LICENSE.LGPL included in the
             ** packaging of this file.  Please review the following information to
             ** ensure the GNU Lesser General Public License version 2.1 requirements
             ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
             **
             ** In addition, as a special exception, Nokia gives you certain additional
             ** rights.  These rights are described in the Nokia Qt LGPL Exception
             ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
             **
             ** If you have questions regarding the use of this file, please contact
             ** Nokia at qt-info@nokia.com.
             **
             **
             **
             **
             **
             **
             **
             **
             ** $QT_END_LICENSE$
             **
             ****************************************************************************/
             #include "shellimplgenerator.h"
             #include "reporthandler.h"
             #include "fileout.h"
             #include <iostream>
             extern void declareFunctionMetaTypes(QTextStream &stream,
                                                  const AbstractMetaFunctionList &functions,
                                                  QSet<QString> &registeredTypeNames);
             QString ShellImplGenerator::fileNameForClass(const AbstractMetaClass *meta_class) const
             {
               return QString("PythonQtWrapper_%1.cpp").arg(meta_class->name());
             }
             static bool include_less_than(const Include &a, const Include &b)
             {
               return a.name < b.name;
             }
             static void writeHelperCode(QTextStream &s, const AbstractMetaClass *)
             {
             }
             void ShellImplGenerator::write(QTextStream &s, const AbstractMetaClass *meta_class)
             {
               QString builtIn = ShellGenerator::isBuiltIn(meta_class->name())?"_builtin":"";
               QString pro_file_name = meta_class->package().replace(".", "_") + builtIn + "/" + meta_class->package().replace(".", "_") + builtIn + ".pri";
               priGenerator->addSource(pro_file_name, fileNameForClass(meta_class));
               s << "#include \"PythonQtWrapper_" << meta_class->name() << ".h\"" << endl << endl;
               s << "#include <PythonQtSignalReceiver.h>" << endl;
               s << "#include <PythonQtMethodInfo.h>" << endl;
               s << "#include <PythonQtConversion.h>" << endl;
               //if (!meta_class->generateShellClass())
               //    return;
               IncludeList list = meta_class->typeEntry()->extraIncludes();
               qSort(list.begin(), list.end());
               foreach (const Include &inc, list) {
                 ShellGenerator::writeInclude(s, inc);
               }
               s << endl;
               writeHelperCode(s, meta_class);
               // find constructors
               AbstractMetaFunctionList ctors;
               ctors = meta_class->queryFunctions(AbstractMetaClass::Constructors
                 | AbstractMetaClass::WasVisible
                 | AbstractMetaClass::NotRemovedFromTargetLang);
               // find member functions
               AbstractMetaFunctionList functions = getFunctionsToWrap(meta_class);
               // write metatype declarations
               {
                 //    QSet<QString> registeredTypeNames = m_qmetatype_declared_typenames;
                 //    declareFunctionMetaTypes(s, functions, registeredTypeNames);
                 //    s << endl;
               }
               if (meta_class->generateShellClass()) {
+                s << shellClassName(meta_class) << "::~" << shellClassName(meta_class) << "() {" << endl;
+                s << "  PythonQtPrivate* priv = PythonQt::priv();" << endl;
+                s << "  if (priv) { priv->shellClassDeleted(this); }" << endl;
+                s << "}" << endl;
                 AbstractMetaFunctionList virtualsForShell = getVirtualFunctionsForShell(meta_class);
                 foreach (const AbstractMetaFunction *fun, virtualsForShell) {
                   bool hasReturnValue = (fun->type());
                   writeFunctionSignature(s, fun, meta_class, QString(),
                     Option(OriginalName | ShowStatic | UnderscoreSpaces),
                     "PythonQtShell_");
                   s << endl << "{" << endl;
                   Option typeOptions = Option(OriginalName | UnderscoreSpaces | SkipName);
                   AbstractMetaArgumentList args = fun->arguments();
                   s << "if (_wrapper) {" << endl;
                   s << "  PyObject* obj = PyObject_GetAttrString((PyObject*)_wrapper, \"" << fun->name() << "\");" << endl;
                   s << "  PyErr_Clear();" << endl;
                   s << "  if (obj && !PythonQtSlotFunction_Check(obj)) {" << endl;
                   s << "    static const char* argumentList[] ={\"";
                   if (hasReturnValue) {
                     // write the arguments, return type first
                     writeTypeInfo(s, fun->type(), typeOptions);
                   }
                   s << "\"";
                   for (int i = 0; i < args.size(); ++i) {
                     s << " , \"";
                     writeTypeInfo(s, args.at(i)->type(), typeOptions);
                     s << "\"";
                   }
                   s << "};" << endl;
                   s << "    static const PythonQtMethodInfo* methodInfo = PythonQtMethodInfo::getCachedMethodInfoFromArgumentList(" << QString::number(args.size()+1) << ", argumentList);" << endl;
                   if (hasReturnValue) {
                     s << "      ";
                     writeTypeInfo(s, fun->type(), typeOptions);
                     s << " returnValue;" << endl;
                     // TODO: POD init to default is missing...
                   }
                   s << "    void* args[" << QString::number(args.size()+1) << "] = {NULL";
                   for (int i = 0; i < args.size(); ++i) {
                     s << ", (void*)&" << args.at(i)->argumentName();
                   }
                   s << "};" << endl;
                   s << "    PyObject* result = PythonQtSignalTarget::call(obj, methodInfo, args, true);" << endl;
                   if (hasReturnValue) {
                     s << "    if (result) {" << endl;
                     s << "      args[0] = PythonQtConv::ConvertPythonToQt(methodInfo->parameters().at(0), result, false, NULL, &returnValue);" << endl;
                     s << "      if (args[0]!=&returnValue) {" << endl;
                     s << "        if (args[0]==NULL) {" << endl;
                     s << "          PythonQt::priv()->handleVirtualOverloadReturnError(\"" << fun->name() << "\", methodInfo, result);" << endl;
                     s << "        } else {" << endl;
                     s << "          returnValue = *((";
                     writeTypeInfo(s, fun->type(), typeOptions);
                     s << "*)args[0]);" << endl;
                     s << "        }" << endl;
                     s << "      }" << endl;
                     s << "    }" << endl;
                   }
                   s << "    if (result) { Py_DECREF(result); } " << endl;
                   s << "    Py_DECREF(obj);" << endl;
                   if (hasReturnValue) {
                     s << "    return returnValue;" << endl;
                   } else {
                     s << "    return;" << endl;
                   }
                   s << "  }" << endl;
                   s << "}" << endl;
                   s << "  ";
                   if (fun->isAbstract()) {
                     if (fun->type()) {
                       // return empty default object
                       s << "return ";
                       if (fun->type()->indirections()>0) {
                         s << "0;";
                       } else {
                         writeTypeInfo(s, fun->type(), typeOptions);
                         s << "();";
                       }
                     }
                   } else {
                     if (fun->type()) {
                       s << "return ";
                     }
                     s << meta_class->qualifiedCppName() << "::";
                     s << fun->originalName() << "(";
                     for (int i = 0; i < args.size(); ++i) {
                       if (i > 0)
                         s << ", ";
                       s << args.at(i)->argumentName();
                     }
                     s << ");";
                   }
                   s << endl << "}" << endl;
                 }
               }
               if (meta_class->generateShellClass() || !meta_class->isAbstract()) {
                 // write constructors
                 foreach (const AbstractMetaFunction *ctor, ctors) {
                   if (!ctor->isPublic() || ctor->isAbstract()) { continue; }
                   s << meta_class->qualifiedCppName() << "* ";
                   s << "PythonQtWrapper_" << meta_class->name() << "::";
                   writeFunctionSignature(s, ctor, 0, "new_", Option(OriginalName | ShowStatic));
                   s << endl;
                   s << "{ " << endl;
                   s << "return new " << (meta_class->generateShellClass()?shellClassName(meta_class):meta_class->qualifiedCppName()) << "(";
                   AbstractMetaArgumentList args = ctor->arguments();
                   for (int i = 0; i < args.size(); ++i) {
                     if (i > 0)
                       s << ", ";
                     s << args.at(i)->argumentName();
                   }
                   s << ");" << " }" << endl << endl;
                 }
               }
               QString wrappedObject = " (*theWrappedObject)";
               // write member functions
               for (int i = 0; i < functions.size(); ++i) {
                 AbstractMetaFunction *fun = functions.at(i);
                 bool needsWrapping = (!fun->isSlot() || fun->isVirtual());
                 if (!needsWrapping) {
                   continue;
                 }
                 writeFunctionSignature(s, fun, meta_class, QString(),
                   Option(ConvertReferenceToPtr | FirstArgIsWrappedObject | OriginalName | ShowStatic | UnderscoreSpaces),
                   "PythonQtWrapper_");
                 s << endl << "{" << endl;
                 s << "  ";
                 if (ShellGenerator::isSpecialStreamingOperator(fun)) {
                   s << fun->arguments().at(0)->argumentName();
                   if (fun->originalName().startsWith("operator>>")) {
                     s << " >> ";
                   } else {
                     s << " << ";
                   }
                   s << wrappedObject;
                 } else {
                   QString scriptFunctionName = fun->originalName();
                   AbstractMetaArgumentList args = fun->arguments();
                   // call the C++ implementation
                   if (fun->type()) {
                     s << "return ";
                     // call the C++ implementation
                     if (fun->type()->isReference()) {
                       s << "&";
                     }
                   }
                   s << "(";
                   if (scriptFunctionName.startsWith("operator>>")) {
                     s << wrappedObject << " >>" << args.at(0)->argumentName();
                   } else if (scriptFunctionName.startsWith("operator<<")) {
                     s << wrappedObject << " <<" << args.at(0)->argumentName();
                   } else if (scriptFunctionName.startsWith("operator[]")) {
                     s << wrappedObject << "[" << args.at(0)->argumentName() << "]";
                   } else if (scriptFunctionName.startsWith("operator") && args.size()==1) {
                     QString op = scriptFunctionName.mid(8);
                     s << wrappedObject << op << " " << args.at(0)->argumentName();
                   } else {
                     if (fun->isStatic()) {
                       s << meta_class->qualifiedCppName() << "::";
                     } else {
                       if (!fun->isPublic() || fun->isVirtual()) {
                         s << " (("  << promoterClassName(meta_class) << "*)theWrappedObject)->promoted_";
                       } else {
                         s << " theWrappedObject->";
                       }
                     }
                     s  << fun->originalName() << "(";
                     for (int i = 0; i < args.size(); ++i) {
                       if (i > 0)
                         s << ", ";
                       s << args.at(i)->argumentName();
                     }
                     s << ")";
                   }
                   s << ")";
                 }
                 s << ";" << endl;
                 s << "}" << endl << endl;
               }
               if (meta_class->hasDefaultToStringFunction()) {
                 s << "QString PythonQtWrapper_" << meta_class->name() << "::py_toString(" << meta_class->qualifiedCppName() << "* obj) { return obj->toString(); }" << endl;
               } else if (meta_class->hasToStringCapability()) {
                 FunctionModelItem fun = meta_class->hasToStringCapability();
                 int indirections = fun->arguments().at(1)->type().indirections();
                 QString deref = QLatin1String(indirections == 0 ? "*" : "");
                 s << "QString PythonQtWrapper_" << meta_class->name() << "::py_toString(" << meta_class->qualifiedCppName() << "* obj) {" << endl;
                 s << "  QString result;" << endl;
                 s << "  QDebug d(&result);" << endl;
                 s << "  d << " << deref  << "obj;" << endl;
                 s << "  return result;" << endl;
                 s << "}" << endl << endl;
               }
               writeInjectedCode(s, meta_class);
             }
             void ShellImplGenerator::writeInjectedCode(QTextStream &s, const AbstractMetaClass *meta_class)
             {
               CodeSnipList code_snips = meta_class->typeEntry()->codeSnips();
               foreach (const CodeSnip &cs, code_snips) {
                 if (cs.language == TypeSystem::PyWrapperCode) {
                   s << cs.code() << endl;
                 }
               }
             }

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