[Inkscape-devel] Geom::OptRect and "warning: dereferencing pointer ‘<anonymous>’ does break strict-aliasing rules"

10 Jan 2010


      I get this warning everywhere an OptRect is used.  For example:
SPItem *item;
Geom::OptRect r = item->getBounds(sp_item_i2doc_affine(item));
if (r) {
    Geom::Point p = r->min();
    //...
will give the warning "./2geom/interval.h:82: warning: dereferencing
pointer ‘<anonymous>’ does break strict-aliasing rules".
To fix this, shouldn't getBounds return optionalGeom::Rect?  Making
an OptRect class seems the wrong use of boost::optional.
To remove OptRect:
isEmpty() becomes "if (optional<Rect> r)".
unionWith(OptRect const &b) becomes another method in Geom::Rect,
unionWith(optional<Rect> b).
See http://www.boost.org/doc/libs/1_41_0/libs/optional/doc/html/boost_optional/e...
I'm willing to refactor to remove OptRect.  Any objections?
- Alex

[Inkscape-devel] Geom::OptRect and "warning: dereferencing pointer ‘<anonymous>’ does break strict-aliasing rules"

Alex Leone