## Summary of Changes
This PR fixes the error reported in issue #781. The main two changes
are:
- in `Refine_edges.h`: allow the refinement point of a constrained edge
to be an existing close encroaching vertex,
- in `Refine_faces.h`: skip tiny bad faces when their bbox are smaller
than a few ulp.
## Release Management
* Affected package(s): Triangulation_2, Mesh_2
* Issue(s) solved (if any): fix#781
* Feature/Small Feature (if any):
* Link to compiled documentation (obligatory for small feature) [*wrong
link name to be changed*](httpssss://wrong_URL_to_be_changed/Manual/Pkg)
* License and copyright ownership: maintenance by GeometryFactory, now
copyright change
## Summary of Changes
Fix issue #9058.
In `CGAL::Delaunay_triangulation_2`, replace thread_local vectors by
`std::array` on the stack.
## Release Management
* Affected package(s): Triangulation_2
* Issue(s) solved (if any): fix#9058
* License and copyright ownership: no change, maintenance by
GeometryFactory
The comparison functor passed to the constraints hierarchy has a
pointer to the `Constrained_triangulation_plus_2` that contains it.
That means the defaulted move constructor and move assignment operator of `Polyline_constraint_hierarchy_2` cannot be used to
implement the move constructor and move assignment operator of
`Constrained_triangulation_plus_2`.
Add a special constructor for `Polyline_constraint_hierarchy_2`, that is
usee to move the hierarchy and reassign the comparison operator.
It is invalid to try to detect if an iterator is singular or value-initialized.
The only operations allowed with value-initialized iterators are:
- copy the iterator, or
- destroy or assign the iterator.
Comparisons like `vertex_it == Vertex_it{}` are not allowed.
VC++ 19.16 thought there was an ambiguous call to `operator==`
between `skip_iterator` and `skip_iterator` in the internals of `boost::iterator_adaptor` (yet another matching bug) of VC++ 19.16).
I solved it by using the more modern `boost::stl_interfaces::iterator_interface` from Boost.STLintface (Boost>=1.74).
Sebastien Loriot