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diff --git a/Source/cmExportSetMap.h b/Source/cmExportSetMap.h
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+++ b/Source/cmExportSetMap.h
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+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmExportSetMap_h
+#define cmExportSetMap_h
+
+#include "cmSystemTools.h"
+class cmExportSet;
+
+/// A name -> cmExportSet map with overloaded operator[].
+class cmExportSetMap : public std::map<std::string, cmExportSet*>
+{
+public:
+  /** \brief Overloaded operator[].
+   *
+   * The operator is overloaded because cmExportSet has no default constructor:
+   * we do not want unnamed export sets.
+   */
+  cmExportSet* operator[](const std::string &name);
+
+  /// Overloaded destructor deletes all member export sets.
+  ~cmExportSetMap();
+};
+
+#endif