c++ - Error when declaring QStringList

Question

I have a public function:

void determineAction(QStringList tempL); // in header file

void CompArch::determineAction(QStringList tempL)
{


}

//in cpp file

I get the error:

CompArch.cpp:127:6: error: ‘tempL’ has incomplete type
/usr/include/qt4/QtCore/qstring.h:77:7: error: forward declaration of ‘struct QStringList’

any ideas why this might be.

Answer 1

add #include <QStringList> to the top of your .cpp file. Incomplete type means that your class (QStringList) has already been named before, using foward declaration, but the content of it has not been declared.

Answer 2

不完整类型意味着编译器已经将 QStringList 视为类，但没有看到 QStringList 类头的主体。看起来您必须包含一个包含 QStringList 的类标题主体的标题。