From: Peter Munch <peterrmuench@gmail.com>
Date: Fri, 22 Oct 2021 16:54:46 +0000 (+0200)
Subject: SparseMatrix::reinit(): accept other sparse matrix
X-Git-Tag: v9.4.0-rc1~899^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F12863%2Fhead;p=dealii.git

SparseMatrix::reinit(): accept other sparse matrix
---

diff --git a/include/deal.II/lac/sparse_matrix.h b/include/deal.II/lac/sparse_matrix.h
index d707f1f38e..2cd998e33c 100644
--- a/include/deal.II/lac/sparse_matrix.h
+++ b/include/deal.II/lac/sparse_matrix.h
@@ -696,6 +696,16 @@ public:
   virtual void
   reinit(const SparsityPattern &sparsity);
 
+  /**
+   * Reinitialize the sparse matrix with the sparsity pattern of the given
+   * @p sparse_matrix. See also comments of the function above.
+   *
+   * @note The elements of the matrix are set to zero by this function.
+   */
+  template <typename number2>
+  void
+  reinit(const SparseMatrix<number2> &sparse_matrix);
+
   /**
    * Release all memory and return to a state just like after having called
    * the default constructor. It also forgets the sparsity pattern it was
@@ -1787,6 +1797,16 @@ private:
 
 
 
+template <typename number>
+template <typename number2>
+void
+SparseMatrix<number>::reinit(const SparseMatrix<number2> &sparse_matrix)
+{
+  this->reinit(sparse_matrix.get_sparsity_pattern());
+}
+
+
+
 template <typename number>
 inline typename SparseMatrix<number>::size_type
 SparseMatrix<number>::m() const