GCC 6 is able to detect when you use a placement new of an object in a
space that is too small to contain it.
qvariant_p.h: In instantiation of ‘void v_construct(QVariant::Private*, const T&) [with T = QRectF]’:
qvariant_p.h:142:9: error: placement new constructing an object of type ‘QRectF’ and size ‘32’ in a region of type ‘void*’ and size ‘8’ [-Werror=placement-new]
new (&x->data.ptr) T(t);
^~~~~~~~~~~~~~~~~~~~~~~
This happens even for the false branch of a constant expression (the
enum). So split the v_construct function in two pairs, one pair for
being able to use the internal space and one pair not so.
Change-Id: Ibc83b9f7e3bc4962ae35ffff1425ed898f279dea
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>
70092c9a47