Qt Creator Clang Code Model - Q_DECLARE_OPERATORS_FOR_FLAGS

poucz

Hello,
in QtCreator I have these piece of test code:

class MyClass
{
public:
    enum Option {
        NoOptions = 0x0,
        ShowTabs = 0x1,
        ShowAll = 0x2,
        SqueezeBlank = 0x4
    };
    Q_DECLARE_FLAGS(Options, Option)
};

Q_DECLARE_OPERATORS_FOR_FLAGS(MyClass::Options)

Clang Code model mark this line red with error:

What I make wrong?

I look at "qnamespace.h" there are lot of Q_DECLARE_OPERATORS_FOR_FLAGS without showing error.

file_logger.h:20:1: error: invalid operands to binary expression ('QFlags<MyClass::Options::enum_type>' (aka 'QFlags<MyClass::Option>') and 'MyClass::Options::enum_type' (aka 'MyClass::Option'))
qflags.h:180:39: note: expanded from macro 'Q_DECLARE_OPERATORS_FOR_FLAGS'
file_logger.h:20:1: note: candidate function not viable: no known conversion from 'QFlags<MyClass::Options::enum_type>' (aka 'QFlags<MyClass::Option>') to 'MyClass::Options::enum_type' (aka 'MyClass::Option') for 1st argument
qflags.h:179:50: note: expanded from macro 'Q_DECLARE_OPERATORS_FOR_FLAGS'
qnamespace.h:1770:1: note: candidate function not viable: no known conversion from 'QFlags<MyClass::Options::enum_type>' (aka 'QFlags<MyClass::Option>') to 'Qt::MouseButtons::enum_type' (aka 'Qt::MouseButton') for 1st argument
qflags.h:182:21: note: expanded from macro 'Q_DECLARE_OPERATORS_FOR_FLAGS'
qflags.h:175:43: note: expanded from macro 'Q_DECLARE_INCOMPATIBLE_FLAGS'
qnamespace.h:1771:1: note: candidate function not viable: no known conversion from 'QFlags<MyClass::Options::enum_type>' (aka 'QFlags<MyClass::Option>') to 'Qt::Orientations::enum_type' (aka 'Qt::Orientation') for 1st argument
...
qflags.h:179:50: note: expanded from macro 'Q_DECLARE_OPERATORS_FOR_FLAGS'
qfiledevice.h:150:1: note: candidate function not viable: no known conversion from 'QFlags<MyClass::Options::enum_type>' (aka 'QFlags<MyClass::Option>') to 'QFileDevice::Permissions::enum_type' (aka 'QFileDevice::Permission') for 1st argument
qflags.h:181:50: note: expanded from macro 'Q_DECLARE_OPERATORS_FOR_FLAGS

Thanks

mrjj

Hi
I tried on window 10 / Qt5.15 visual stud compiler and
it didn't complain.

What os/ Qt version and compiler are you seeing this with ?

alt text

poucz

Thank you for reply.

Solved by changing toolchain.

I'm using:
Qt Creator 4.14.1
Base on Qt 5.15.2 (GCC 7.3.1 20180303 (Red Hat 7.3.1-5), 64 bit)
ClangCodeModel: 4.14.1 (4.14.0)

Error appear with QT5.10 toolchain (gcc 4.8)
When I use QT5.15 error disapear. (gcc 8.3.0)

mrjj

@poucz

a bit of googling around suggested that there was some bug in Qt about
Q_DECLARE_OPERATORS_FOR_FLAGS that was fixed in 5.12
so that makes sense if you had it in 5.10 and then gone in 5.15.