add CellID::str()

diff --git a/include/deal.II/grid/cell_id.h b/include/deal.II/grid/cell_id.h
index 7a971bc5e9aaea3bcbc8a33ff840b3c6330fd147..8748802e16376ecb3fe016f651fb19b34707fa64 100644 (file)
--- a/include/deal.II/grid/cell_id.h
+++ b/include/deal.II/grid/cell_id.h
@@ -20,6 +20,7 @@
 #include <deal.II/base/exceptions.h>
 
 #include <vector>
+#include <sstream>
 
 
 DEAL_II_NAMESPACE_OPEN
@@ -68,6 +69,16 @@ public:
     : coarse_cell_id(-1)
   {}
 
+  /**
+   *
+   */
+  std::string str() const
+  {
+    std::ostringstream ss;
+    ss << *this;
+    return ss.str();
+  }
+
   /**
    * compare two CellIds
    */