From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 31 Oct 2017 21:44:39 +0000 (-0600)
Subject: Update a comment.
X-Git-Tag: v9.0.0-rc1~839^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F5369%2Fhead;p=dealii.git

Update a comment.
---

diff --git a/include/deal.II/base/mpi.h b/include/deal.II/base/mpi.h
index 8afff6e2c5..f931f23d63 100644
--- a/include/deal.II/base/mpi.h
+++ b/include/deal.II/base/mpi.h
@@ -164,6 +164,15 @@ namespace Utilities
               const MPI_Comm &mpi_communicator,
               T (&sums)[N]);
 
+    /**
+     * Like the previous function, but take the sums over the elements of an
+     * array as specified by the ArrayView arguments.
+     * In other words, the i-th element of the results
+     * array is the sum over the i-th entries of the input arrays from each
+     * processor.
+     *
+     * Input and output arrays may be the same.
+     */
     template <typename T>
     void sum (const ArrayView<const T> &values,
               const MPI_Comm           &mpi_communicator,