CGAL users discussion list

[Marc Glisse <>]

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.

--
Marc Glisse