From 123879a9a05d925f04fe3989f59666db6bf19768 Mon Sep 17 00:00:00 2001
From: Julius Witte <julius.witte@iwr.uni-heidelberg.de>
Date: Wed, 25 Sep 2019 12:28:43 -0400
Subject: [PATCH] Expose static size and value type

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

diff --git a/include/deal.II/lac/tensor_product_matrix.h b/include/deal.II/lac/tensor_product_matrix.h
index ffab3f43be..8c9877bd61 100644
--- a/include/deal.II/lac/tensor_product_matrix.h
+++ b/include/deal.II/lac/tensor_product_matrix.h
@@ -74,6 +74,17 @@ template <int dim, typename Number, int size = -1>
 class TensorProductMatrixSymmetricSumBase
 {
 public:
+  /**
+   * Type of matrix entries. This alias is analogous to <tt>value_type</tt>
+   * in the standard library containers.
+   */
+  using value_type = Number;
+
+  /**
+   * Compile-time array lengths given by the template parameter size.
+   */
+  static constexpr int static_size = size;
+
   /**
    * Return the number of rows of the tensor product matrix
    * resulting from the Kronecker product of 1D matrices, which is described
-- 
2.39.5