QFlags使用

#define Q_DECLARE_FLAGS(Flags, Enum)\
typedef QFlags<Enum> Flags;

#ifndef TESTCLASS_H
#define TESTCLASS_H

#include <QFlags>

class TestClass
{
public:
    enum Option {
        OptionA = 0x1,  // 0x000001
        OptionB = 0x2,  // 0x000010
        OptionC = 0x4,  // 0x000100
        OptionD = 0x8,  // 0x001000
        OptionE = 0x10 // 0x010000
                  // ... some more options with value which is a power of two
              };
    Q_DECLARE_FLAGS(Options, Option)
    };

Q_DECLARE_OPERATORS_FOR_FLAGS(TestClass::Options)

#endif // TESTCLASS_H

#include <QtCore/QCoreApplication>
#include "testclass.h"
#include <QDebug>

void test (TestClass::Options flag)
{
  if (flag.testFlag(TestClass::OptionA))
    qDebug() << "A";
  if (flag.testFlag(TestClass::OptionB))
    qDebug() << "B";
}

int main()
{
  test (TestClass::OptionA | TestClass::OptionB);
  //test (0x1);  // error
}

TODO ：Q_FLAGS()宏不知道怎么用。。。。