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diff --git a/Source/cmSourceGroup.h b/Source/cmSourceGroup.h
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+++ b/Source/cmSourceGroup.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 cmSourceGroup_h
+#define cmSourceGroup_h
+
+#include "cmStandardIncludes.h"
+#include <cmsys/RegularExpression.hxx>
+
+class cmSourceFile;
+
+class cmSourceGroupInternals;
+
+/** \class cmSourceGroup
+ * \brief Hold a group of sources as specified by a SOURCE_GROUP command.
+ *
+ * cmSourceGroup holds a regular expression and a list of files.  When
+ * local generators are about to generate the rules for a target's
+ * files, the set of source groups is consulted to group files
+ * together.  A file is placed into the last source group that lists
+ * the file by name.  If no group lists the file, it is placed into
+ * the last group whose regex matches it.
+ */
+class cmSourceGroup
+{
+public:
+  cmSourceGroup(const char* name, const char* regex,
+                const char* parentName=0);
+  cmSourceGroup(cmSourceGroup const& r);
+  ~cmSourceGroup();
+  cmSourceGroup& operator=(cmSourceGroup const&);
+  
+  /**
+   * Set the regular expression for this group.
+   */
+  void SetGroupRegex(const char* regex);
+  
+  /**
+   * Add a file name to the explicit list of files for this group.
+   */
+  void AddGroupFile(const char* name);
+
+  /**
+   * Add child to this sourcegroup
+   */
+  void AddChild(cmSourceGroup child);
+
+  /**
+   * Looks up child and returns it
+   */
+  cmSourceGroup *lookupChild(const char *name);
+  
+  /**
+   * Get the name of this group.
+   */
+  const char* GetName() const;
+
+  /**
+   * Get the full path name for group.
+   */
+  const char* GetFullName() const;
+  
+  /**
+   * Check if the given name matches this group's regex.
+   */
+  bool MatchesRegex(const char* name);
+  
+  /**
+   * Check if the given name matches this group's explicit file list.
+   */
+  bool MatchesFiles(const char* name);
+
+  /**
+   * Check if the given name matches this group's explicit file list
+   * in children.
+   */
+  cmSourceGroup *MatchChildrenFiles(const char *name);
+
+  /**
+   * Check if the given name matches this group's regex in children.
+   */
+  cmSourceGroup *MatchChildrenRegex(const char *name);
+  
+  /**  
+   * Assign the given source file to this group.  Used only by
+   * generators.
+   */
+  void AssignSource(const cmSourceFile* sf);
+
+  /**
+   * Get the list of the source files that have been assigned to this
+   * source group.
+   */
+  const std::vector<const cmSourceFile*>& GetSourceFiles() const;
+  
+  std::vector<cmSourceGroup> const& GetGroupChildren() const;
+private:
+  /**
+   * The name of the source group.
+   */
+  std::string Name;
+  // Full path to group
+  std::string FullName;
+  
+  /**
+   * The regular expression matching the files in the group.
+   */
+  cmsys::RegularExpression GroupRegex;
+  
+  /**
+   * Set of file names explicitly added to this group.
+   */
+  std::set<cmStdString> GroupFiles;
+  
+  /**
+   * Vector of all source files that have been assigned to
+   * this group.
+   */
+  std::vector<const cmSourceFile*> SourceFiles;
+
+  cmSourceGroupInternals* Internal;
+};
+
+#endif