From: Uwe Köcher <mail@uwe.koecher.cc>
Date: Mon, 29 Oct 2018 22:08:08 +0000 (+0100)
Subject: enhanced documentation for DoFTools::Coupling::nonzero
X-Git-Tag: v9.1.0-rc1~592^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6417f0baca535a06cb7ce26454d8d850ddc6fd0f;p=dealii.git

enhanced documentation for DoFTools::Coupling::nonzero
---

diff --git a/include/deal.II/dofs/dof_tools.h b/include/deal.II/dofs/dof_tools.h
index 379cdc5f18..2dd019639d 100644
--- a/include/deal.II/dofs/dof_tools.h
+++ b/include/deal.II/dofs/dof_tools.h
@@ -214,6 +214,8 @@ namespace DoFTools
      * Two components couple only if their shape functions are both nonzero on
      * a given face. This flag is only used when computing integrals over
      * faces of cells, e.g., in DoFTools::make_flux_sparsity_pattern().
+     * Use Coupling::always in general cases where gradients etc. occur on face
+     * integrals.
      */
     nonzero
   };