From 6bfe3b28d3a1e0a5a9b13170a5a0bceee8e1f21c Mon Sep 17 00:00:00 2001
From: Denis Davydov <davydden@gmail.com>
Date: Mon, 22 Feb 2016 13:52:33 +0100
Subject: [PATCH] temporary mark max/min element in grid_refinement for
 complex-valued PETSc as NotImplemented

---
 source/grid/grid_refinement.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/source/grid/grid_refinement.cc b/source/grid/grid_refinement.cc
index 629e6ed1e4..a31f4d159b 100644
--- a/source/grid/grid_refinement.cc
+++ b/source/grid/grid_refinement.cc
@@ -71,8 +71,12 @@ namespace
       // to get the array of values from PETSc
       // in every iteration), but works
       PetscScalar m = 0;
+#ifndef PETSC_USE_COMPLEX
       for (unsigned int i=0; i<criteria.size(); ++i)
         m = std::max (m, criteria(i));
+#else
+      Assert(false, ExcNotImplemented())
+#endif
       return m;
     }
 
@@ -85,8 +89,12 @@ namespace
       // to get the array of values from PETSc
       // in every iteration), but works
       PetscScalar m = criteria(0);
+#ifndef PETSC_USE_COMPLEX
       for (unsigned int i=1; i<criteria.size(); ++i)
         m = std::min (m, criteria(i));
+#else
+      Assert(false, ExcNotImplemented());
+#endif
       return m;
     }
 #endif
-- 
2.39.5