Hello Qt and C++ experts.
I try to let the compiler generate a QLatin1String instance from a string
literal.
Q_DECL_CONSTEXPR inline explicit QLatin1String(const char *s) Q_DECL_NOTHROW :
m_size(s ? int(strlen(s)) : 0), m_data(s) {}
cannot really do this as it uses strlen, is this right? Only a
QLatin1String(nullptr) would be generated at compile time.
There is also
Q_DECL_CONSTEXPR inline explicit QLatin1String(const char *s, int sz)
Q_DECL_NOTHROW : m_size(sz), m_data(s) {}
but this has an additonal length parameter.
So I wrote this:
class Latin1Literal : public QLatin1String
{
public:
template <std::size_t N>
Q_DECL_CONSTEXPR inline explicit Latin1Literal(const char (&s)[N])
Q_DECL_NOTHROW : QLatin1String(s, N - 1)
{
}
};
I can then do something like if
(arguments.contains(HmiGfx::RHQt::UtQt::Latin1Literal("--fullscreen")))
or define a variable like Q_CONSTEXPR Latin1Literal MY_PREFIX("Prefix");
My question is now, is this the right thing to do and could something like that
be added to Qt itself?
Regards,
Gunnar Roth
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