QMetaProperty: limit QMetaEnum resolution to enums known to QMetaTypeHEADdev

Since we don't know ahead of time if a property's type is an enum
or a flag we have to resolve it at runtime.

In a QMetaProperty-heavy application this overhead can be quite dramatic
given that we mark anything that is not a built-in as a potential
flag/enum.

However, QMetaType already knows if it's an enum, so we can use that to
return early if it's not known to the meta-type system.
To add to this - Q_PROPERTY requires that a type is fully defined, so
there are no issues with forward declarations for the enums.

Change-Id: Ifecc7f1e6cdef416e3ce72ee705eb26e682071cc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

0 files changed, 0 insertions, 0 deletions