CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le Wednesday 25 November 2015 18:52:03 Marc Glisse a écrit :
> On Wed, 25 Nov 2015, Bart Vermeulen wrote:
> > I'm trying to use c++11 threads with a Kd_tree.
> > 
> > I have a function which takes a Kd_Tree as input:
> > 
> > void foo (Tree const & tree, ...) {
> > 
> >    // Do something
> > 
> > }
> > 
> > Than I try to pass the function to a std::thread construction:
> > 
> > std::thread thethread(foo, tree, ...);
> > 
> > This gives me an error telling me that the constructor Kd_tree(const Tree&
> > tree) is private.
> > 
> > The std::thread construction requires all parameters to be move
> > constructible, but why is this construction private for a Kd_tree?
> > 
> > Is there some way around this issue?
> 
> http://en.cppreference.com/w/cpp/utility/functional/reference_wrapper
> 
> On Wed, 25 Nov 2015, Bart Vermeulen wrote:
> > I solved the issue passing a pointer to the tree, instead of a reference.
> > 
> > Still I think it's strange that the copy construction is made private in
> > Kd_tree.
> 
> How often do you actually want a copy of a kd-tree? If you are doing the
> copy by accident, or because you don't know the right syntax, it is good
> that you get some error about it.

But should not the CGAL develop try to allow the move constructor, when the 
copy constructor is disabled?

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/