added operator<< for BlockVectors

[[Imported from SVN: r1079]]

istl/bvector.hh

@@ -58,6 +58,7 @@ namespace Dune {
 
     //===== assignment from scalar
 
+    //! Assignment from a scalar
     block_vector_unmanaged& operator= (const field_type& k)
     {
       for (int i=0; i<this->n; i++)
@@ -353,6 +354,15 @@ namespace Dune {
     }
   };
 
+  //! Send BlockVector to an output stream
+  template<class K, class A>
+  std::ostream& operator<< (std::ostream& s, const BlockVector<K, A>& v)
+  {
+    for (int i=0; i<v.size(); i++)
+      s << v[i] << std::endl;
+
+    return s;
+  }
 
   /** BlockVectorWindow adds window manipulation functions
           to the block_vector_unmanaged template.