Qt vs constexpr string literal

Question

Is there a way to define as static constexpr string literal member in Qt? I.e. something like the following:

class X
{
   static constexpr QString tag = "mytag";
};

Answer 1

I did what Jesper recommended in his comment, I used QLatin1String. But I used it through a small helper class to avoid the strlen() call in QLatin1String:

struct ConstLatin1String : public QLatin1String
{
    constexpr ConstLatin1String(const char* const s) : 
        QLatin1String(s, static_cast<int>(std::char_traits<char>::length(s))) {}
};

This allows to do:

static constexpr ConstLatin1String mystring = "foo";