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Attempt to squeeze unionized fake qproperty members even further 

... by using the [[no_unique_address]] attribute, if available, instead
of the union.

Change-Id: Iab4db7039f1140a0005c7dd2fb6e08597ceec8f5
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
bb10
Simon Hausmann 2020-04-16 10:02:58 +02:00
parent 3d7265db90
commit 818de32db2
1 changed files with 9 additions and 2 deletions
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11
src/corelib/kernel/qtmetamacros.h
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@ -115,10 +115,17 @@ QT_BEGIN_NAMESPACE
QPropertyBinding<type> takeBinding(); \
}; \
void setter(const type &value);
#if __has_cpp_attribute(no_unique_address)
#define Q_PRIVATE_QPROPERTIES_BEGIN
#define QT_PRIVATE_QPROPERTY_PREFIX [[no_unique_address]]
#define Q_PRIVATE_QPROPERTIES_END
#else
#define Q_PRIVATE_QPROPERTIES_BEGIN union {
#define Q_PRIVATE_QPROPERTY_IMPL(name) \
_qt_property_api_##name name;
#define QT_PRIVATE_QPROPERTY_PREFIX
#define Q_PRIVATE_QPROPERTIES_END };
#endif
#define Q_PRIVATE_QPROPERTY_IMPL(name) \
QT_PRIVATE_QPROPERTY_PREFIX _qt_property_api_##name name;
#ifndef Q_REVISION
# define Q_REVISION(...)
#endif