moc.cpp

奇趣公司比较新的qt/emd版本

            error();
    }

    if (scopedFunctionName) {
        QByteArray msg("Function declaration ");
        msg += def->name;
        msg += " contains extra qualification. Ignoring as signal or slot.";
        warning(msg.constData());
        return false;
    }
    return true;
}

// like parseFunction, but never aborts with an error
bool Moc::parseMaybeFunction(FunctionDef *def)
{
    def->type = parseType();
    if (def->type.name.isEmpty())
        return false;
    bool scopedFunctionName = false;
    if (test(LPAREN)) {
        def->name = def->type.name;
        scopedFunctionName = def->type.isScoped;
        def->type = Type("int");
    } else {
        Type tempType = parseType();;
        while (!tempType.name.isEmpty() && lookup() != LPAREN) {
            if (def->type.name == "QT_MOC_COMPAT" || def->type.name == "QT3_SUPPORT")
                def->isCompat = true;
            else if (def->type.name == "Q_INVOKABLE")
                def->isInvokable = true;
            else if (def->type.name == "Q_SCRIPTABLE")
                def->isInvokable = def->isScriptable = true;
            else if (def->type.name == "Q_SIGNAL")
                def->isSignal = true;
            else if (def->type.name == "Q_SLOT")
                def->isSlot = true;
            else {
                if (!def->tag.isEmpty())
                    def->tag += ' ';
                def->tag += def->type.name;
            }
            def->type = tempType;
            tempType = parseType();
        }
        if (!test(LPAREN))
            return false;
        def->name = tempType.name;
        scopedFunctionName = tempType.isScoped;
    }

    // we don't support references as return types, it's too dangerous
    if (def->type.referenceType == Type::Reference)
        def->type = Type("void");

    def->normalizedType = normalizeType(def->type.name);

    if (!test(RPAREN)) {
        parseFunctionArguments(def);
        if (!test(RPAREN))
            return false;
    }
    def->isConst = test(CONST);
    if (scopedFunctionName
        && (def->isSignal || def->isSlot || def->isInvokable)) {
        QByteArray msg("parsemaybe: Function declaration ");
        msg += def->name;
        msg += " contains extra qualification. Ignoring as signal or slot.";
        warning(msg.constData());
        return false;
    }
    return true;
}


void Moc::parse()
{
    QList<NamespaceDef> namespaceList;
    bool templateClass = false;
    while (hasNext()) {
        Token t = next();
        switch (t) {
            case NAMESPACE: {
                int rewind = index;
                if (test(IDENTIFIER)) {
                    if (test(EQ)) {
                        // namespace Foo = Bar::Baz;
                        until(SEMIC);
                    } else if (!test(SEMIC)) {
                        NamespaceDef def;
                        def.name = lexem();
                        next(LBRACE);
                        def.begin = index - 1;
                        until(RBRACE);
                        def.end = index;
                        index = def.begin + 1;
                        namespaceList += def;
                        index = rewind;
                    }
                }
                break;
            }
            case SEMIC:
            case RBRACE:
                templateClass = false;
                break;
            case TEMPLATE:
                templateClass = true;
                break;
            case MOC_INCLUDE_BEGIN:
                currentFilenames.push(symbol().unquotedLexem());
                break;
            case MOC_INCLUDE_END:
                currentFilenames.pop();
                break;
            case Q_DECLARE_INTERFACE_TOKEN:
                parseDeclareInterface();
                break;
            case Q_DECLARE_METATYPE_TOKEN:
                parseDeclareMetatype();
                break;
            case USING:
                if (test(NAMESPACE)) {
                    while (test(SCOPE) || test(IDENTIFIER))
                        ;
                    next(SEMIC);
                }
                break;
            case CLASS:
            case STRUCT: {
                if (currentFilenames.size() <= 1)
                    break;

                ClassDef def;
                if (!parseClassHead(&def))
                    continue;

                while (inClass(&def) && hasNext()) {
                    if (next() == Q_OBJECT_TOKEN) {
                        def.hasQObject = true;
                        break;
                    }
                }

                if (!def.hasQObject)
                    continue;

                for (int i = namespaceList.size() - 1; i >= 0; --i)
                    if (inNamespace(&namespaceList.at(i)))
                        def.qualified.prepend(namespaceList.at(i).name + "::");

                knownQObjectClasses.insert(def.classname);
                knownQObjectClasses.insert(def.qualified);

                continue; }
            default: break;
        }
        if ((t != CLASS && t != STRUCT)|| currentFilenames.size() > 1)
            continue;
        ClassDef def;
        if (parseClassHead(&def)) {
            FunctionDef::Access access = FunctionDef::Private;
            for (int i = namespaceList.size() - 1; i >= 0; --i)
                if (inNamespace(&namespaceList.at(i)))
                    def.qualified.prepend(namespaceList.at(i).name + "::");
            while (inClass(&def) && hasNext()) {
                switch ((t = next())) {
                case PRIVATE:
                    access = FunctionDef::Private;
                    if (test(Q_SIGNALS_TOKEN))
                        error("Signals cannot have access specifier");
                    break;
                case PROTECTED:
                    access = FunctionDef::Protected;
                    if (test(Q_SIGNALS_TOKEN))
                        error("Signals cannot have access specifier");
                    break;
                case PUBLIC:
                    access = FunctionDef::Public;
                    if (test(Q_SIGNALS_TOKEN))
                        error("Signals cannot have access specifier");
                    break;
                case CLASS: {
                    ClassDef nestedDef;
                    if (parseClassHead(&nestedDef)) {
                        while (inClass(&nestedDef) && inClass(&def)) {
                            t = next();
                            if (t >= Q_META_TOKEN_BEGIN && t < Q_META_TOKEN_END)
                                error("Meta object features not supported for nested classes");
                        }
                    }
                } break;
                case Q_SIGNALS_TOKEN:
                    parseSignals(&def);
                    break;
                case Q_SLOTS_TOKEN:
                    switch (lookup(-1)) {
                    case PUBLIC:
                    case PROTECTED:
                    case PRIVATE:
                        parseSlots(&def, access);
                        break;
                    default:
                        error("Missing access specifier for slots");
                    }
                    break;
                case Q_OBJECT_TOKEN:
                    def.hasQObject = true;
                    if (templateClass)
                        error("Template classes not supported by Q_OBJECT");
                    if (def.classname != "Qt" && def.classname != "QObject" && def.superclassList.isEmpty())
                        error("Class contains Q_OBJECT macro but does not inherit from QObject");
                    break;
                case Q_GADGET_TOKEN:
                    def.hasQGadget = true;
                    if (templateClass)
                        error("Template classes not supported by Q_GADGET");
                    break;
                case Q_PROPERTY_TOKEN:
                    parseProperty(&def);
                    break;
                case Q_ENUMS_TOKEN:
                    parseEnumOrFlag(&def, false);
                    break;
                case Q_FLAGS_TOKEN:
                    parseEnumOrFlag(&def, true);
                    break;
                case Q_DECLARE_FLAGS_TOKEN:
                    parseFlag(&def);
                    break;
                case Q_CLASSINFO_TOKEN:
                    parseClassInfo(&def);
                    break;
                case Q_INTERFACES_TOKEN:
                    parseInterfaces(&def);
                    break;
                case Q_PRIVATE_SLOT_TOKEN:
                    parseSlotInPrivate(&def, access);
                    break;
                case ENUM: {
                    EnumDef enumDef;
                    if (parseEnum(&enumDef))
                        def.enumList += enumDef;
                } break;
                default:
                    FunctionDef funcDef;
                    funcDef.access = access;
                    int rewind = index;
                    if (parseMaybeFunction(&funcDef)) {
                        if (access == FunctionDef::Public)
                            def.publicList += funcDef;
                        if (funcDef.isSlot) {
                            def.slotList += funcDef;
                            while (funcDef.arguments.size() > 0 && funcDef.arguments.last().isDefault) {
                                funcDef.wasCloned = true;
                                funcDef.arguments.removeLast();
                                def.slotList += funcDef;
                            }
                        } else if (funcDef.isSignal) {
                            def.signalList += funcDef;
                            while (funcDef.arguments.size() > 0 && funcDef.arguments.last().isDefault) {
                                funcDef.wasCloned = true;
                                funcDef.arguments.removeLast();
                                def.signalList += funcDef;
                            }
                        } else if (funcDef.isInvokable) {
                            def.methodList += funcDef;
                            while (funcDef.arguments.size() > 0 && funcDef.arguments.last().isDefault) {
                                funcDef.wasCloned = true;
                                funcDef.arguments.removeLast();
                                def.methodList += funcDef;
                            }
                        }
                    } else {
                        index = rewind;
                    }
                }
            }

            next(RBRACE);

            if (!def.hasQObject && def.signalList.isEmpty() && def.slotList.isEmpty()
                && def.propertyList.isEmpty() && def.enumDeclarations.isEmpty())
                continue; // no meta object code required


            if (!def.hasQObject && !def.hasQGadget)
                error("Class declarations lacks Q_OBJECT macro.");

            checkSuperClasses(&def);

            classList += def;
            knownQObjectClasses.insert(def.classname);
            knownQObjectClasses.insert(def.qualified);
        }
    }
}

void Moc::generate(FILE *out)
{

    QDateTime dt = QDateTime::currentDateTime();
    QByteArray dstr = dt.toString().toLatin1();
    QByteArray fn = filename;
    int i = filename.length()-1;
    while (i>0 && filename[i-1] != '/' && filename[i-1] != '\\')
        --i;                                // skip path
    if (i >= 0)
        fn = filename.mid(i);
    fprintf(out, "/****************************************************************************\n"
            "** Meta object code from reading C++ file '%s'\n**\n" , (const char*)fn);
    fprintf(out, "** Created: %s\n"
            "**      by: The Qt Meta Object Compiler version %d (Qt %s)\n**\n" , dstr.data(), mocOutputRevision, QT_VERSION_STR);
    fprintf(out, "** WARNING! All changes made in this file will be lost!\n"
            "*****************************************************************************/\n\n");


    if (!noInclude) {
        if (includePath.size() && includePath.right(1) != "/")
            includePath += "/";
        for (int i = 0; i < includeFiles.size(); ++i) {
            QByteArray inc = includeFiles.at(i);
            if (inc[0] != '<' && inc[0] != '"') {
                if (includePath.size() && includePath != "./")
                    inc.prepend(includePath);
                inc = "\"" + inc + "\"";
            }
            fprintf(out, "#include %s\n", inc.constData());
        }
    }
    if (classList.size() && classList.first().classname == "Qt")
        fprintf(out, "#include <QtCore/qobject.h>\n");

    fprintf(out, "#if !defined(Q_MOC_OUTPUT_REVISION)\n"
            "#error \"The header file '%s' doesn't include <QObject>.\"\n", (const char *)fn);
    fprintf(out, "#elif Q_MOC_OUTPUT_REVISION != %d\n", mocOutputRevision);
    fprintf(out, "#error \"This file was generated using the moc from %s."
            " It\"\n#error \"cannot be used with the include files from"
            " this version of Qt.\"\n#error \"(The moc has changed too"
            " much.)\"\n", QT_VERSION_STR);
    fprintf(out, "#endif\n\n");


    for (i = 0; i < classList.size(); ++i) {
        Generator generator(&classList[i], metaTypes, out);
        generator.generateCode();
    }
}


QList<QMetaObject*> Moc::generate(bool ignoreProperties)
{
    QList<QMetaObject*> result;
    for (int i = 0; i < classList.size(); ++i) {
        Generator generator(&classList[i], metaTypes);
        result << generator.generateMetaObject(ignoreProperties);
    }
    return result;
}

void Moc::parseSlots(ClassDef *def, FunctionDef::Access access)
{
    next(COLON);
    while (inClass(def) && hasNext()) {
        switch (next()) {
        case PUBLIC:
        case PROTECTED:
        case PRIVATE:
        case Q_SIGNALS_TOKEN:
        case Q_SLOTS_TOKEN:
            prev();
            return;
        case SEMIC:
            continue;
        case FRIEND:
            until(SEMIC);
            continue;
        case USING:
            error("'using' directive not supported in 'slots' section");
        default:
            prev();
        }

        FunctionDef funcDef;
        funcDef.access = access;
        if (!parseFunction(&funcDef))
            continue;
        def->slotList += funcDef;
        while (funcDef.arguments.size() > 0 && funcDef.arguments.last().isDefault) {
            funcDef.wasCloned = true;