moc.cpp

奇趣公司比较新的qt/emd版本

            funcDef.arguments.removeLast();
            def->slotList += funcDef;
        }
    }
}

void Moc::parseSignals(ClassDef *def)
{
    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 'signals' section");
        default:
            prev();
        }
        FunctionDef funcDef;
        funcDef.access = FunctionDef::Protected;
        parseFunction(&funcDef);
        if (funcDef.isVirtual)
            error("Signals cannot be declared virtual");
        if (funcDef.inlineCode)
            error("Not a signal declaration");
        def->signalList += funcDef;
        while (funcDef.arguments.size() > 0 && funcDef.arguments.last().isDefault) {
            funcDef.wasCloned = true;
            funcDef.arguments.removeLast();
            def->signalList += funcDef;
        }
    }
}


void Moc::parseProperty(ClassDef *def)
{
    next(LPAREN);
    PropertyDef propDef;
    QByteArray type = parseType().name;
    if (type.isEmpty())
        error();
    propDef.designable = propDef.scriptable = propDef.stored = "true";
    propDef.user = "false";
    /*
      The Q_PROPERTY construct cannot contain any commas, since
      commas separate macro arguments. We therefore expect users
      to type "QMap" instead of "QMap<QString, QVariant>". For
      coherence, we also expect the same for
      QValueList<QVariant>, the other template class supported by
      QVariant.
    */
    type = normalizeType(type);
    if (type == "QMap")
        type = "QMap<QString,QVariant>";
    else if (type == "QValueList")
        type = "QValueList<QVariant>";
    else if (type == "LongLong")
        type = "qlonglong";
    else if (type == "ULongLong")
        type = "qulonglong";
    propDef.type = type;

    next();
    propDef.name = lexem();
    while (test(IDENTIFIER)) {
        QByteArray l = lexem();
        QByteArray v, v2;
        if (test(LPAREN)) {
            v = lexemUntil(RPAREN);
        } else {
            next(IDENTIFIER);
            v = lexem();
            if (test(LPAREN))
                v2 = lexemUntil(RPAREN);
            else if (v != "true" && v != "false")
                v2 = "()";
        }
        switch (l[0]) {
        case 'R':
            if (l == "READ")
                propDef.read = v;
            else if (l == "RESET")
                propDef.reset = v + v2;
            else
                error(2);
            break;
        case 'S':
            if (l == "SCRIPTABLE")
                propDef.scriptable = v + v2;
            else if (l == "STORED")
                propDef.stored = v + v2;
            else
                error(2);
            break;
        case 'W': if (l != "WRITE") error(2);
            propDef.write = v;
            break;
        case 'D': if (l != "DESIGNABLE") error(2);
            propDef.designable = v + v2;
            break;
        case 'E': if (l != "EDITABLE") error(2);
            propDef.editable = v + v2;
            break;
        case 'N': if (l != "NOTIFY") error(2);
            break;
        case 'U': if (l != "USER") error(2);
            propDef.user = v + v2;
            break;
        default:
            error(2);
        }
    }
    next(RPAREN);
    def->propertyList += propDef;
}

void Moc::parseEnumOrFlag(ClassDef *def, bool isFlag)
{
    next(LPAREN);
    QByteArray identifier;
    while (test(IDENTIFIER)) {
        identifier = lexem();
        while (test(SCOPE) && test(IDENTIFIER)) {
            identifier += "::";
            identifier += lexem();
        }
        def->enumDeclarations[identifier] = isFlag;
    }
    next(RPAREN);
}

void Moc::parseFlag(ClassDef *def)
{
    next(LPAREN);
    QByteArray flagName, enumName;
    while (test(IDENTIFIER)) {
        flagName = lexem();
        while (test(SCOPE) && test(IDENTIFIER)) {
            flagName += "::";
            flagName += lexem();
        }
    }
    next(COMMA);
    while (test(IDENTIFIER)) {
        enumName = lexem();
        while (test(SCOPE) && test(IDENTIFIER)) {
            enumName += "::";
            enumName += lexem();
        }
    }

    def->flagAliases.insert(enumName, flagName);
    next(RPAREN);
}

void Moc::parseClassInfo(ClassDef *def)
{
    next(LPAREN);
    ClassInfoDef infoDef;
    next(STRING_LITERAL);
    infoDef.name = symbol().unquotedLexem();
    next(COMMA);
    if (test(STRING_LITERAL)) {
        infoDef.value = symbol().unquotedLexem();
    } else {
        // support Q_CLASSINFO("help", QT_TR_NOOP("blah"))
        next(IDENTIFIER);
        next(LPAREN);
        next(STRING_LITERAL);
        infoDef.value = symbol().unquotedLexem();
        next(RPAREN);
    }
    next(RPAREN);
    def->classInfoList += infoDef;
}

void Moc::parseInterfaces(ClassDef *def)
{
    next(LPAREN);
    while (test(IDENTIFIER)) {
        QList<ClassDef::Interface> iface;
        iface += ClassDef::Interface(lexem());
        while (test(SCOPE)) {
            iface.last().className += lexem();
            next(IDENTIFIER);
            iface.last().className += lexem();
        }
        while (test(COLON)) {
            next(IDENTIFIER);
            iface += ClassDef::Interface(lexem());
            while (test(SCOPE)) {
                iface.last().className += lexem();
                next(IDENTIFIER);
                iface.last().className += lexem();
            }
        }
        // resolve from classnames to interface ids
        for (int i = 0; i < iface.count(); ++i) {
            const QByteArray iid = interface2IdMap.value(iface.at(i).className);
            if (iid.isEmpty())
                error("Undefined interface");

            iface[i].interfaceId = iid;
        }
        def->interfaceList += iface;
    }
    next(RPAREN);
}

void Moc::parseDeclareInterface()
{
    next(LPAREN);
    QByteArray interface;
    next(IDENTIFIER);
    interface += lexem();
    while (test(SCOPE)) {
        interface += lexem();
        next(IDENTIFIER);
        interface += lexem();
    }
    next(COMMA);
    QByteArray iid;
    if (test(STRING_LITERAL)) {
        iid = lexem();
    } else {
        next(IDENTIFIER);
        iid = lexem();
    }
    interface2IdMap.insert(interface, iid);
    next(RPAREN);
}

void Moc::parseDeclareMetatype()
{
    next(LPAREN);
    QByteArray typeName = lexemUntil(RPAREN);
    typeName.remove(0, 1);
    typeName.chop(1);
    metaTypes.append(typeName);
}

void Moc::parseSlotInPrivate(ClassDef *def, FunctionDef::Access access)
{
    next(LPAREN);
    FunctionDef funcDef;
    next(IDENTIFIER);
    funcDef.inPrivateClass = lexem();
    // also allow void functions
    if (test(LPAREN)) {
        next(RPAREN);
        funcDef.inPrivateClass += "()";
    }
    next(COMMA);
    funcDef.access = access;
    parseFunction(&funcDef, true);
    def->slotList += funcDef;
    while (funcDef.arguments.size() > 0 && funcDef.arguments.last().isDefault) {
        funcDef.wasCloned = true;
        funcDef.arguments.removeLast();
        def->slotList += funcDef;
    }
}

QByteArray Moc::lexemUntil(Token target)
{
    int from = index;
    until(target);
    QByteArray s;
    while (from <= index) {
        QByteArray n = symbols.at(from++-1).lexem();
        if (s.size() && n.size()
            && is_ident_char(s.at(s.size()-1))
            && is_ident_char(n.at(0)))
            s += ' ';
        s += n;
    }
    return s;
}

bool Moc::until(Token target) {
    int braceCount = 0;
    int brackCount = 0;
    int parenCount = 0;
    int angleCount = 0;
    if (index) {
        switch(symbols.at(index-1).token) {
        case LBRACE: ++braceCount; break;
        case LBRACK: ++brackCount; break;
        case LPAREN: ++parenCount; break;
        case LANGLE: ++angleCount; break;
        default: break;
        }
    }
    while (index < symbols.size()) {
        Token t = symbols.at(index++).token;
        switch (t) {
        case LBRACE: ++braceCount; break;
        case RBRACE: --braceCount; break;
        case LBRACK: ++brackCount; break;
        case RBRACK: --brackCount; break;
        case LPAREN: ++parenCount; break;
        case RPAREN: --parenCount; break;
        case LANGLE: ++angleCount; break;
        case RANGLE: --angleCount; break;
        case GTGT: angleCount -= 2; t = RANGLE; break;
        default: break;
        }
        if (t == target
            && braceCount <= 0
            && brackCount <= 0
            && parenCount <= 0
            && (target != RANGLE || angleCount <= 0))
            return true;

        if (braceCount < 0 || brackCount < 0 || parenCount < 0
            || (target == RANGLE && angleCount < 0)) {
            --index;
            break;
        }
    }
    return false;
}

void Moc::checkSuperClasses(ClassDef *def)
{
    const QByteArray firstSuperclass = def->superclassList.value(0).first;

    if (!knownQObjectClasses.contains(firstSuperclass)) {
        // enable once we /require/ include paths
#if 0
        QByteArray msg;
        msg += "Class ";
        msg += def->className;
        msg += " contains the Q_OBJECT macro and inherits from ";
        msg += def->superclassList.value(0);
        msg += " but that is not a known QObject subclass. You may get compilation errors.";
        warning(msg.constData());
        return;
#endif
    }
    for (int i = 1; i < def->superclassList.count(); ++i) {
        const QByteArray superClass = def->superclassList.at(i).first;
        if (knownQObjectClasses.contains(superClass)) {
            QByteArray msg;
            msg += "Class ";
            msg += def->classname;
            msg += " inherits from two QObject subclasses ";
            msg += firstSuperclass;
            msg += " and ";
            msg += superClass;
            msg += ". This is not supported!";
            warning(msg.constData());
        }

        if (interface2IdMap.contains(superClass)) {
            bool registeredInterface = false;
            for (int i = 0; i < def->interfaceList.count(); ++i)
                if (def->interfaceList.at(i).first().className == superClass) {
                    registeredInterface = true;
                    break;
                }

            if (!registeredInterface) {
                QByteArray msg;
                msg += "Class ";
                msg += def->classname;
                msg += " implements the interface ";
                msg += superClass;
                msg += " but does not list it in Q_INTERFACES. qobject_cast to ";
                msg += superClass;
                msg += " will not work!";
                warning(msg.constData());
            }
        }
    }
}