如何使用自定义 class 的 QVector 容器？

Question

这是我为个人项目实施的自定义 class：

#include <QtCore/QCommandLineOption>
#include <QtCore/QSharedPointer>

#include <genepy/cli/CommandLineArgument.h>
#include <genepy/cli/CommandLineOption.h>

class QCommandLineParser;

namespace genepy {

class CommandLineParserBuilder;
class ConsoleApplication;

class GENEPY_EXPORT CommandLineParser {
public:
    static CommandLineParserBuilder create(const ConsoleApplication& application);

    void doParsing();

    template <typename T>
    T getArgumentValue(const QString& name) const;

    bool isOptionPresent(const QString& name) const;

    template <typename T>
    T getOptionValue(const QString& name) const;

private:
    friend class CommandLineParserBuilder;

    explicit CommandLineParser(const ConsoleApplication& application);

    const QSharedPointer<QCommandLineParser> parser_;

    const QCommandLineOption helpOption_;
    const QCommandLineOption versionOption_;

    QVector<CommandLineArgument> arguments_;

    QVector<CommandLineOption> options_;
};

} // namespace genepy

完整代码可见here.

当我在 Windows（MinGW、MSVC）上用 Qt 5.15 编译这段代码时，没有问题。但是，在带有 Qt 5.7 的 Debian 9 上，我收到此错误：

In file included from /home/erwan/git/genepy/include/genepy/cli/CommandLineParserBuilder.h:29:0,
                 from /home/erwan/git/genepy/src/cli/CommandLineParser.cpp:29:
/home/erwan/git/genepy/include/genepy/cli/CommandLineParser.h:94:34: error: field ‘arguments_’ has incomplete type ‘QVector<genepy::CommandLineArgument>’
     QVector<CommandLineArgument> arguments_;
                                  ^~~~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:1139:0,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:43,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:43,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qstringlist.h:41,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qcommandlineparser.h:43,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/QCommandLineParser:1,
                 from /home/erwan/git/genepy/src/cli/CommandLineParser.cpp:26:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qtypeinfo.h:189:1: note: declaration of ‘class QVector<genepy::CommandLineArgument>’
 Q_DECLARE_MOVABLE_CONTAINER(QVector);
 ^
In file included from /home/erwan/git/genepy/include/genepy/cli/CommandLineParserBuilder.h:29:0,
                 from /home/erwan/git/genepy/src/cli/CommandLineParser.cpp:29:
/home/erwan/git/genepy/include/genepy/cli/CommandLineParser.h:97:32: error: field ‘options_’ has incomplete type ‘QVector<genepy::CommandLineOption>’
     QVector<CommandLineOption> options_;
                                ^~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:1139:0,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:43,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:43,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qstringlist.h:41,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qcommandlineparser.h:43,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/QCommandLineParser:1,
                 from /home/erwan/git/genepy/src/cli/CommandLineParser.cpp:26:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qtypeinfo.h:189:1: note: declaration of ‘class QVector<genepy::CommandLineOption>’
 Q_DECLARE_MOVABLE_CONTAINER(QVector);
 ^

我不知道这段代码出了什么问题...有人可以帮助我吗？非常感谢您的帮助。

Answer 1

最后，我将 QVector<CommandLineArgument> 更改为 QVector<QSharedPointer<CommandLineArgument>>，因为 CommandLineArgument 不是 可分配数据类型 （它缺少默认构造函数等）。现在，它起作用了。

如何使用自定义 class 的 QVector 容器？

How to use the QVector container with a custom class?

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