Fixed ticket #12761 ("intrusive::set::swap doesn't swap the comparison function")

doc/intrusive.qbk

@@ -3869,6 +3869,7 @@ to be inserted in intrusive containers are allocated using `std::vector` or `std
 
 *  Fixed bugs:
    *  [@https://svn.boost.org/trac/boost/ticket/12745 Boost Trac #12745: ['key_nodeptr_comp broken if the key type is void*]]
+   *  [@https://svn.boost.org/trac/boost/ticket/12761 Boost Trac #12761: ['intrusive::set::swap doesn't swap the comparison function*]]
 
 [endsect]
 

include/boost/intrusive/bstree.hpp

@@ -967,7 +967,7 @@ class bstree_impl
    void swap(bstree_impl& other)
    {
       //This can throw
-      ::boost::adl_move_swap(this->comp(), this->comp());
+      ::boost::adl_move_swap(this->comp(), other->comp());
       //These can't throw
       node_algorithms::swap_tree(this->header_ptr(), node_ptr(other.header_ptr()));
       this->sz_traits().swap(other.sz_traits());

include/boost/intrusive/treap.hpp

@@ -354,9 +354,9 @@ class treap_impl
    //! <b>Throws</b>: If the comparison functor's swap call throws.
    void swap(treap_impl& other)
    {
-      tree_type::swap(other);
       //This can throw
       ::boost::adl_move_swap(this->priv_pcomp(), other.priv_pcomp());
+      tree_type::swap(other);
    }
 
    //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw.