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diff --git a/tools/inspect/inspector.hpp b/tools/inspect/inspector.hpp
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+//  inspector header  --------------------------------------------------------//
+
+//  Copyright Beman Dawes 2002.
+//  Copyright Rene Rivera 2004.
+//  Copyright Gennaro Prota 2006.
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_INSPECTOR_HPP
+#define BOOST_INSPECTOR_HPP
+
+#include <set>
+#include <iostream>
+#include <ostream>
+#include <string>
+#include "boost/filesystem/path.hpp"
+
+using std::string;
+using boost::filesystem::path;
+
+namespace boost
+{
+  namespace inspect
+  {
+    typedef std::set< string > string_set;
+
+    const char * line_break();
+
+    class inspector
+    {
+    protected:
+        inspector() {}
+
+    public:
+      virtual ~inspector() {}
+
+      virtual const char * name() const = 0; // example: "tab-check"
+      virtual const char * desc() const = 0; // example: "verify no tabs"
+
+      // always called:
+      virtual void inspect(
+        const string & /*library_name*/, // "filesystem"
+        const path & /*full_path*/ ) {}  // "c:/foo/boost/filesystem/path.hpp"
+
+      // called only for registered leaf() signatures:
+      virtual void inspect(
+        const string & library_name, // "filesystem"
+        const path & full_path,      // "c:/foo/boost/filesystem/path.hpp"
+        const string & contents )    // contents of file
+      = 0
+      ;
+
+      // called after all paths visited, but still in time to call error():
+      virtual void close() {}
+
+      // callback used by constructor to register leaf() signature.
+      // Signature can be a full file name (Jamfile) or partial (.cpp)
+      void register_signature( const string & signature );
+      const string_set & signatures() const { return m_signatures; }
+
+      // report error callback (from inspect(), close() ):
+      void error(
+        const string & library_name,
+        const path & full_path,
+        const string & msg,
+        int line_number =0 );  // 0 if not available or not applicable
+
+    private:
+      string_set m_signatures;
+    };
+
+    // for inspection of source code of one form or other
+    class source_inspector : public inspector
+    {
+    public:
+      // registers the basic set of known source signatures
+      source_inspector();
+    };
+
+    // for inspection of hypertext, specifically html
+    class hypertext_inspector : public inspector
+    {
+    public:
+      // registers the set of known html source signatures
+      hypertext_inspector();
+    };
+
+    inline string relative_to( const path & src_arg, const path & base_arg )
+    {
+      path base( base_arg );
+      base.normalize();
+      string::size_type pos( base.string().size() );
+      path src( src_arg.string().substr(pos) );
+      src.normalize();
+      return src.string().substr(1);
+    }
+
+    string impute_library( const path & full_dir_path );
+
+  }
+}
+
+#endif // BOOST_INSPECTOR_HPP
+