From 9acfc7a0a19c6434c8a36090d3cd5aa299260d5f Mon Sep 17 00:00:00 2001
From: grahambenharper <grahambenharper@gmail.com>
Date: Mon, 16 Sep 2019 10:15:20 -0600
Subject: [PATCH] Make TensorProductPolynomialsConst a friend of
 TensorProductPolynomials

---
 include/deal.II/base/tensor_product_polynomials.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/deal.II/base/tensor_product_polynomials.h b/include/deal.II/base/tensor_product_polynomials.h
index 1022310303..28f7c9d036 100644
--- a/include/deal.II/base/tensor_product_polynomials.h
+++ b/include/deal.II/base/tensor_product_polynomials.h
@@ -30,8 +30,13 @@
 
 DEAL_II_NAMESPACE_OPEN
 
+// Forward declarations for friends
+// TODO: We may be able to modify these classes so they aren't
+// required to be friends
 template <int dim>
 class TensorProductPolynomialsBubbles;
+template <int dim>
+class TensorProductPolynomialsConst;
 
 /**
  * @addtogroup Polynomials
@@ -236,6 +241,12 @@ protected:
    * so we declare it as a friend class.
    */
   friend class TensorProductPolynomialsBubbles<dim>;
+
+  /**
+   * TensorProductPolynomialsConst has a TensorProductPolynomials class
+   * so we declare it as a friend class.
+   */
+  friend class TensorProductPolynomialsConst<dim>;
 };
 
 
-- 
2.39.5