CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 02/20/2015 09:01 PM, Marius Kintel wrote:
> On Feb 20, 2015, at 14:55 PM, Sebastien Loriot (GeometryFactory) 
> <>
>  wrote:
> > In the meantime you can try:
> > #define CGAL_CT2_WANTS_TO_HAVE_EXTRA_ACTION_FOR_INTERSECTING_CONSTRAINTS
> > #define CGAL_CDT2_EXTRA_ACTION_FOR_INTERSECTING_CONSTRAINTS throw 
> > WhatEverException;
> >
> > This will allow you to throw an exception if constraints intersect.
> Not sure that would make a difference. If those defines are not there, the default 
> action is "CGAL_triangulation_assertion(false);”
> ..which throws an exception. The presence of this exception is what causes 
> the later crash.
>
> My understanding is that what we need is to _not_ throw _any_ exceptions in 
> destructors, as that requires a guarantee that no existing exceptions can be 
> active. Such a guarantee is probably hard or tedious to maintain.

With the patch for Nef, I don't have any exception thrown in the 
destructor anymore in the polyhedron demo.
If you have an issue triangulating an invalid face, then if you throw
an exception using the macros I mentioned it should be OK if you protect
your call to Nef_polyhedron_3::convert_to_polyhedron with a try/catch.

Maybe I'm missing something here...

Sebastien.


>   -Marius