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diff --git a/Source/cmListFileCache.h b/Source/cmListFileCache.h
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+++ b/Source/cmListFileCache.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 cmListFileCache_h
+#define cmListFileCache_h
+
+#include "cmStandardIncludes.h"
+
+#include "cmState.h"
+
+/** \class cmListFileCache
+ * \brief A class to cache list file contents.
+ *
+ * cmListFileCache is a class used to cache the contents of parsed
+ * cmake list files.
+ */
+
+class cmMakefile;
+
+struct cmCommandContext
+{
+  std::string Name;
+  long Line;
+  cmCommandContext(): Name(), Line(0) {}
+};
+
+struct cmListFileArgument
+{
+  enum Delimiter
+    {
+    Unquoted,
+    Quoted,
+    Bracket
+    };
+  cmListFileArgument(): Value(), Delim(Unquoted), Line(0) {}
+  cmListFileArgument(const cmListFileArgument& r)
+    : Value(r.Value), Delim(r.Delim), Line(r.Line) {}
+  cmListFileArgument(const std::string& v, Delimiter d, long line)
+    : Value(v), Delim(d), Line(line) {}
+  bool operator == (const cmListFileArgument& r) const
+    {
+    return (this->Value == r.Value) && (this->Delim == r.Delim);
+    }
+  bool operator != (const cmListFileArgument& r) const
+    {
+    return !(*this == r);
+    }
+  std::string Value;
+  Delimiter Delim;
+  long Line;
+};
+
+struct cmListFileContext
+{
+  std::string Name;
+  std::string FilePath;
+  long Line;
+  cmListFileContext(): Name(), FilePath(), Line(0) {}
+
+  static cmListFileContext FromCommandContext(cmCommandContext const& lfcc,
+                                              std::string const& fileName)
+  {
+    cmListFileContext lfc;
+    lfc.FilePath = fileName;
+    lfc.Line = lfcc.Line;
+    lfc.Name = lfcc.Name;
+    return lfc;
+  }
+};
+
+std::ostream& operator<<(std::ostream&, cmListFileContext const&);
+bool operator<(const cmListFileContext& lhs, const cmListFileContext& rhs);
+bool operator==(cmListFileContext const& lhs, cmListFileContext const& rhs);
+bool operator!=(cmListFileContext const& lhs, cmListFileContext const& rhs);
+
+struct cmListFileFunction: public cmCommandContext
+{
+  std::vector<cmListFileArgument> Arguments;
+};
+
+class cmListFileBacktrace
+{
+  public:
+    cmListFileBacktrace(cmState::Snapshot snapshot = cmState::Snapshot(),
+                        cmCommandContext const& cc = cmCommandContext());
+    ~cmListFileBacktrace();
+
+    void PrintTitle(std::ostream& out) const;
+    void PrintCallStack(std::ostream& out) const;
+  private:
+    cmCommandContext Context;
+    cmState::Snapshot Snapshot;
+};
+
+struct cmListFile
+{
+  bool ParseFile(const char* path,
+                 bool topLevel,
+                 cmMakefile *mf);
+
+  std::vector<cmListFileFunction> Functions;
+};
+
+#endif