QFlags with std::initializer_list

**TorAn** · 17th January 2016, 15:05

I am having a problem with QFlags class. Here is an pseudo-code example. I'll appreciate any comment/advise. Thanks.

Qt Code:

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class A {
... 
public:
    enum class SignalState {ENTRY, EXIT};
...
};
 
class B {
public:
    Q_DECLARE_FLAGS(SignalUsage, A::SignalState)
    B ()  : usage(A::SignalState::ENTRY | A::SignalState::EXIT) // fails
    {
    }
    B (int)  : usage(std::initializer_list<SignalUsage>({A::SignalState::ENTRY, A::SignalState::EXIT}) // fails
    {
    }
    B (char)  : usage(A::SignalState::ENTRY) // compiles
    {
         usage |= A::SignalState::EXIT; // compiles
    }
private:
    SignalUsage usage;
}

class A {
... 
public:
    enum class SignalState {ENTRY, EXIT};
...
};

class B {
public:
    Q_DECLARE_FLAGS(SignalUsage, A::SignalState)
    B ()  : usage(A::SignalState::ENTRY | A::SignalState::EXIT) // fails
    {
    }
    B (int)  : usage(std::initializer_list<SignalUsage>({A::SignalState::ENTRY, A::SignalState::EXIT}) // fails
    {
    }
    B (char)  : usage(A::SignalState::ENTRY) // compiles
    {
         usage |= A::SignalState::EXIT; // compiles
    }
private:
    SignalUsage usage;
}

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