在qglobal.h中,定义了很多宏.下面这个QT_REQUIER_CONFIG,展开成: #define QT_REQUIRE_CONFIG(feature) Q_STATIC_ASSERT_X(QT_FEATURE_##feature == 1, "Required feature " #feature " for file " __FILE__ " not available.") 注意宏定义连字符##的作用,看来Q_STATIC_ASSE…