[Interest] Is it safe to call qRegisterMetaType() before main()?

Thiago Macieira thiago.macieira at intel.com
Sun Jul 28 06:15:51 CEST 2019


On Friday, 26 July 2019 17:35:03 PDT Nikos Chantziaras wrote:
> I didn't (although I use Q_ENUM, but it does the same job.) But there's
> no constructor to put qRegisterMetaType() in. It's an enum. There's no
> constructor. Some enums are in a namespace, some are in a class, but
> even with an enum that is in a class, users of can just use the enum in
> their own signals/slots prior to instantiating the class that declares
> the enum. It will stay unregistered until the first instance of the
> class is created.
> ____________________

I meant in the class it's most likely to be used in.

This is only required when referring to it by name, such as in old-style 
signal-slot connection, QML, D-Bus, etc.

Loading it into a QVariant automatically registers, as QVariant calls 
qMetaTypeId<Enum>() to get the metatype ID.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel System Software Products





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