From 4f74f8e6eb38a9e324784e3d5985733bae405887 Mon Sep 17 00:00:00 2001
From: Reza Rastak <rastak@stanford.edu>
Date: Thu, 15 Aug 2019 20:01:38 -0700
Subject: [PATCH] added #ifndef DOXYGEN to some forward declarations

---
 include/deal.II/base/mpi.h              | 2 ++
 include/deal.II/base/symmetric_tensor.h | 3 +++
 include/deal.II/base/tensor.h           | 3 ++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/deal.II/base/mpi.h b/include/deal.II/base/mpi.h
index d5aa725229..dac995371a 100644
--- a/include/deal.II/base/mpi.h
+++ b/include/deal.II/base/mpi.h
@@ -87,6 +87,7 @@ DEAL_II_NAMESPACE_OPEN
 
 
 // Forward type declarations to allow MPI sums over tensorial types
+#ifndef DOXYGEN
 template <int rank, int dim, typename Number>
 class Tensor;
 template <int rank, int dim, typename Number>
@@ -94,6 +95,7 @@ class SymmetricTensor;
 template <typename Number>
 class SparseMatrix;
 class IndexSet;
+#endif
 
 namespace Utilities
 {
diff --git a/include/deal.II/base/symmetric_tensor.h b/include/deal.II/base/symmetric_tensor.h
index bf65aec239..63a5b7ef0d 100644
--- a/include/deal.II/base/symmetric_tensor.h
+++ b/include/deal.II/base/symmetric_tensor.h
@@ -28,8 +28,11 @@
 
 DEAL_II_NAMESPACE_OPEN
 
+// Forward declaration
+#ifndef DOXYGEN
 template <int rank, int dim, typename Number = double>
 class SymmetricTensor;
+#endif
 
 template <int dim, typename Number>
 DEAL_II_CONSTEXPR inline DEAL_II_ALWAYS_INLINE SymmetricTensor<2, dim, Number>
diff --git a/include/deal.II/base/tensor.h b/include/deal.II/base/tensor.h
index e4416f4ab8..8bee1a536e 100644
--- a/include/deal.II/base/tensor.h
+++ b/include/deal.II/base/tensor.h
@@ -38,13 +38,14 @@
 DEAL_II_NAMESPACE_OPEN
 
 // Forward declarations:
-
+#ifndef DOXYGEN
 template <int dim, typename Number>
 class Point;
 template <int rank_, int dim, typename Number = double>
 class Tensor;
 template <typename Number>
 class Vector;
+#endif
 
 #ifndef DOXYGEN
 // Overload invalid tensor types of negative rank that come up during
-- 
2.39.5