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diff --git a/src/stlplus/strings/string_sequence.tpp b/src/stlplus/strings/string_sequence.tpp
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+++ b/src/stlplus/strings/string_sequence.tpp
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+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+////////////////////////////////////////////////////////////////////////////////
+#include "string_pair.hpp"
+
+namespace stlplus
+{
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // any forward iterator sequence
+
+  template <typename I, typename S>
+  std::string sequence_to_string(I begin,
+                                 I end, 
+                                 S to_string,
+                                 const std::string& separator)
+  {
+    std::string result;
+    for (I i = begin; i != end; i++)
+    {
+      if (i != begin) result += separator;
+      result += to_string(*i);
+    }
+    return result;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // any sequence where the value is a pair
+
+  template <typename I, typename S1, typename S2>
+  std::string pair_sequence_to_string(I begin,
+                                      I end,
+                                      S1 to_string_fn1,
+                                      S2 to_string_fn2,
+                                      const std::string& pair_separator,
+                                      const std::string& separator)
+  {
+    std::string result;
+    for (I i = begin; i != end; i++)
+    {
+      if (i != begin) result += separator;
+      result += pair_to_string(*i, to_string_fn1, to_string_fn2, pair_separator);
+    }
+    return result;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+} // end namespace stlplus