From: Peter Munch <peterrmuench@gmail.com>
Date: Thu, 5 Mar 2020 10:27:14 +0000 (+0100)
Subject: Intoduce and use new ExcNeedsMPI
X-Git-Tag: v9.2.0-rc1~450^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63c1813704bb74af9a73d2a0a3dcf5fb2c9ee75b;p=dealii.git

Intoduce and use new ExcNeedsMPI
---

diff --git a/include/deal.II/base/exceptions.h b/include/deal.II/base/exceptions.h
index a39dc457b9..6444344f11 100644
--- a/include/deal.II/base/exceptions.h
+++ b/include/deal.II/base/exceptions.h
@@ -1086,6 +1086,14 @@ namespace StandardExceptions
     "if deal.II was configured to use LAPACK, but cmake did not "
     "find a valid LAPACK library.");
 
+  /**
+   * This function requires support for the MPI library.
+   */
+  DeclExceptionMsg(
+    ExcNeedsMPI,
+    "You are attempting to use functionality that is only available "
+    "if deal.II was configured to use MPI.");
+
   /**
    * This function requires support for the NetCDF library.
    *
diff --git a/source/distributed/tria_base.cc b/source/distributed/tria_base.cc
index 189be2a997..e52413f64d 100644
--- a/source/distributed/tria_base.cc
+++ b/source/distributed/tria_base.cc
@@ -52,9 +52,7 @@ namespace parallel
     , n_subdomains(Utilities::MPI::n_mpi_processes(this->mpi_communicator))
   {
 #ifndef DEAL_II_WITH_MPI
-    Assert(false,
-           ExcMessage("You compiled deal.II without MPI support, for "
-                      "which parallel::TriangulationBase is not available."));
+    Assert(false, ExcNeedsMPI());
 #endif
   }
 
@@ -67,9 +65,7 @@ namespace parallel
   {
 #ifndef DEAL_II_WITH_MPI
     (void)other_tria;
-    Assert(false,
-           ExcMessage("You compiled deal.II without MPI support, for "
-                      "which parallel::TriangulationBase is not available."));
+    Assert(false, ExcNeedsMPI());
 #else
     dealii::Triangulation<dim, spacedim>::copy_triangulation(other_tria);