另一个宏中的Q_PROPERTY宏 [英] Q_PROPERTY macro within another macro

问题描述

如何将 Q_PROPERTY 宏放在另一个辅助宏中?

How to put the Q_PROPERTY macro inside another, helper-macro?

#define SimpleAllinOne(member, _type) \
  public: \
  void Set##member(_type _arg_##member) \
  { \
    m_##member = _arg_##member;\
  } \
  _type Get##member() const\
  { \
    return m_##member;\
  } \
  private: \
    _type m_##member; \
    Q_PROPERTY(_type member READ Get##member WRITE Set##member)

..不起作用.预处理程序输出( gcc -E标志或 nmake/jom/P标志)显示了(有效的)setter/getter方法和相应的成员变量，但没有显示 Q_PROPERTY 行.

.. does not work. Preprocessor output (gcc -E flag or nmake/jom /P flag) shows the (working) setter/getter methods and corresponding member variable but not a single character for the Q_PROPERTY line.

更新:似乎可以与Qt5.1一起使用，后者可以正确扩展用户宏.Qt4.8不起作用，Qt5.0尚未经过测试.请参见#QTBUG-35 (感谢??)./p>Qt4.x中的

Update: It seems to work with Qt5.1 which expands the user macros properly. Qt4.8 does not work, Qt5.0 has not been tested. See #QTBUG-35 (thanks to ??).

推荐答案

moc无法识别预处理器宏中的Q_宏.

moc in Qt4.x does not recognize Q_ macros within preprocessor macros.

moc会在解析Q_宏之前扩展预处理器宏.

moc in Qt5.x expands the preprocessor macros before parsing the Q_ macros.

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