From: Timo Heister <timo.heister@gmail.com>
Date: Mon, 31 Aug 2015 17:55:47 +0000 (-0400)
Subject: remove Exception from Hdiv_seminorm
X-Git-Tag: v8.4.0-rc2~504^2~4
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12e2bcb02a0d2c91c5c509e5843f31c7a562b539;p=dealii.git

remove Exception from Hdiv_seminorm

also add some comments
---

diff --git a/include/deal.II/numerics/vector_tools.templates.h b/include/deal.II/numerics/vector_tools.templates.h
index e5821a98d0..8b6d4c272b 100644
--- a/include/deal.II/numerics/vector_tools.templates.h
+++ b/include/deal.II/numerics/vector_tools.templates.h
@@ -6218,6 +6218,8 @@ namespace VectorTools
         }
 
       double diff = 0;
+
+      // First work on function values:
       switch (norm)
         {
         case mean:
@@ -6245,7 +6247,7 @@ namespace VectorTools
               diff += sum * fe_values.JxW(q);
             }
 
-          // Compute the root only, if no derivative values are added later
+          // Compute the root only if no derivative values are added later
           if (!(update_flags & update_gradients))
             diff = std::pow(diff, 1./exponent);
           break;
@@ -6275,8 +6277,10 @@ namespace VectorTools
           break;
 
         case H1_seminorm:
+        case Hdiv_seminorm:
         case W1p_seminorm:
         case W1infty_seminorm:
+          // function values are not used for these norms
           break;
 
         default:
@@ -6284,6 +6288,7 @@ namespace VectorTools
           break;
         }
 
+      // Now compute terms depending on derivatives:
       switch (norm)
         {
         case W1p_seminorm: