Add note on template parameter to GridTools::get_active_neighbors.

diff --git a/include/deal.II/grid/grid_tools.h b/include/deal.II/grid/grid_tools.h
index 6d5b276837d6eb635f26d20fbf40d48cd118db8d..175c0b55b1909ad5dadb412d50887159c0cabc54 100644 (file)
--- a/include/deal.II/grid/grid_tools.h
+++ b/include/deal.II/grid/grid_tools.h
@@ -1392,6 +1392,13 @@ namespace GridTools
    * @param[in] cell An iterator pointing to a cell of the mesh.
    * @param[out] active_neighbors A list of active descendants of the given
    * cell
+   *
+   * @note Since in C++ the MeshType template argument can not be deduced from
+   * a function call, you will have to specify it after the function name, as
+   * for example in
+   * @code
+   *   GridTools::get_active_neighbors<DoFHandler<dim>>(cell, active_neighbors)
+   * @endcode
    */
   template <class MeshType>
   void