From: brian <brian@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Thu, 22 May 2003 15:13:39 +0000 (+0000)
Subject: added empty() function
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12af058725e0af949819db4a2fda435d9b8bb6f5;p=dealii-svn.git

added empty() function


git-svn-id: https://svn.dealii.org/trunk@7669 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/lac/include/lac/pointer_matrix.h b/deal.II/lac/include/lac/pointer_matrix.h
index 2d8b5eb42c..e659c9082c 100644
--- a/deal.II/lac/include/lac/pointer_matrix.h
+++ b/deal.II/lac/include/lac/pointer_matrix.h
@@ -95,6 +95,12 @@ public:
 				    */
   PointerMatrix (const MATRIX* M=0);
 
+				     /**
+				      * Return whether the object is
+				      * empty. 
+				      */
+  bool empty () const;
+
 				   /**
 				    * Assign a new matrix
 				    * pointer. Deletes the old pointer
@@ -159,6 +165,16 @@ PointerMatrix<MATRIX, VECTOR>::operator= (const MATRIX* M)
   return *this;
 }
 
+
+template<class MATRIX, class VECTOR>
+inline bool
+PointerMatrix<MATRIX, VECTOR>::empty () const
+{
+  if (m == 0)
+    return true;
+  return m->empty();
+}
+
 template<class MATRIX, class VECTOR>
 inline void
 PointerMatrix<MATRIX, VECTOR>::vmult (VECTOR& dst,