Imported Upstream version 3.3.0.2upstream/3.3.0.2

50 files changed, 4348 insertions, 0 deletions

diff --git a/libbackend-elements/GPLv2 b/libbackend-elements/GPLv2
new file mode 100644
index 0000000..3912109
--- /dev/null
+++ b/libbackend-elements/GPLv2
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
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+Foundation's software and to any other program whose authors commit to
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+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
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+
+	    How to Apply These Terms to Your New Programs
+
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+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
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+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
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+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
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+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
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+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
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+This General Public License does not permit incorporating your program into
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+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
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diff --git a/libbackend-elements/INSTALL b/libbackend-elements/INSTALL
new file mode 100644
index 0000000..71f9f4a
--- /dev/null
+++ b/libbackend-elements/INSTALL
@@ -0,0 +1,26 @@
+Prerequisites
+
+  build-time:
+
+    - build          >= 0.3.2    http://kolpackov.net/projects/build/
+    - g++            >= 3.4.3    http://gcc.gnu.org
+
+  run-time:
+
+    - libcult        >= 1.4.1    http://kolpackov.net/projects/libcult/
+    - libboost_regex >= 1.33.1   http://boost.org
+    
+
+Building libbackend-elements
+
+  To build in the source directory simply say `make'. You can also
+  build in a separate directory, e.g.,
+
+  $ mkdir libbackend-elements-i686-pc-linux-gnu
+  $ cd libbackend-elements-i686-pc-linux-gnu
+  $ make -f ../libbackend-elements-x.y.z/makefile
+
+
+Installing libbackend-elements
+
+  Not supported in this version.
diff --git a/libbackend-elements/LICENSE b/libbackend-elements/LICENSE
new file mode 100644
index 0000000..3204be4
--- /dev/null
+++ b/libbackend-elements/LICENSE
@@ -0,0 +1,25 @@
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License version 2 as
+published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+In addition, as a special exception, Boris Kolpackov gives permission
+to combine this library with other incompatibly-licensed modules in a
+single program and to distribute such a combination provided that there
+is no use of the functionality implemented by this library, directly
+or indirectly, by such modules. You must obey the GNU General Public
+License version 2 in all respects for all of the code used other than
+such modules. In particular, the resulting program must be licensed
+under a license compatible with the GNU General Public License version
+2. If you modify this copy of the library, you may extend this exception
+to your version of the library, but you are not obligated to do so. If
+you do not wish to do so, delete this exception statement from your
+version.
diff --git a/libbackend-elements/NEWS b/libbackend-elements/NEWS
new file mode 100644
index 0000000..6e1c5b9
--- /dev/null
+++ b/libbackend-elements/NEWS
@@ -0,0 +1,91 @@
+Version 1.7.2
+
+  * Fix a bug in C++ indenter.
+
+  * Add support for libbackend-elements bundling.
+
+  * New boost import stub.
+
+Version 1.7.1
+
+  * Add an exception to the licensing terms to allow combining with
+    incompatibly-licensed modules in a single program. See the LICENSE
+    file for details.
+
+Version 1.7.0
+
+  * Support for the '} foo_;' construct in the C++ indenter.
+
+Version 1.6.1
+
+  * Fixed a bug in import stubs.
+  
+  * Got rid of warnings reported by g++-4.3.
+
+Version 1.6.0
+
+  * New Regex::Pattern class that represents a regex pattern (without
+    substitution, unlike Regex::Expression).
+
+  * Removed Regex::perl_s functions. Use the Regex::Expression class
+    which provides extended functionality and better error handling.
+
+Version 1.5.0
+
+  * New regex class.
+
+  * Upgraded to the new boost import stub.
+
+Version 1.4.1
+
+  * Upgraded to the new boost import stub.
+
+Version 1.4.0
+
+  * Support for the do-while construct in the C++ indenter.
+
+Version 1.3.0
+
+  * Support for the C-style comments in the C++ indenter.
+
+Version 1.2.0
+
+  * Upgraded to build-0.3.0.
+
+Version 1.1.0
+
+  * Numerous improvements to the C++ indenter. In particular, it
+    now can properly indent single-line blocks after if, else, etc.
+    as well as suppress new lines between }else, }case, and }catch.
+    It was also optimized for speed.
+
+  * Added a test for the C++ indenter.
+
+
+Version 1.0.4
+
+  * Upgraded to the version-aware libboost import stub.
+
+
+Version 1.0.3
+
+  * Upgraded to build-0.2.0.
+
+  * C++ auto-indenter has been improved to recognize and ignore beginnings
+    of string literals (") and character literals (') in C++-style comments.
+
+
+Version 1.0.2
+
+  * C++ auto-indenter has been improved to support function argument
+    indentation. Both "same-line" and "new-line" styles are supported.
+
+
+Version 1.0.1
+
+  * Build system improvements.
+
+
+Version 1.0.0
+
+  * First public release.
diff --git a/libbackend-elements/README b/libbackend-elements/README
new file mode 100644
index 0000000..42bf3d8
--- /dev/null
+++ b/libbackend-elements/README
@@ -0,0 +1,14 @@
+libbackend_elements is a collection of elementary building for
+implementing compiler backends in c++.
+
+See the NEWS file for the user-visible changes from the previous release.
+
+See the LICENSE file for distribution conditions.
+
+See the INSTALL file for prerequisites and installation instructions.
+
+See the documentation/index.xhtml file for documentation.
+
+The project page is at http://kolpackov.net/projects/libfrontend_elements/.
+
+Send bug reports or any other feedback to boris@kolpackov.net .
diff --git a/libbackend-elements/backend-elements/indentation/buffer.hxx b/libbackend-elements/backend-elements/indentation/buffer.hxx
new file mode 100644
index 0000000..7058814
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/buffer.hxx
@@ -0,0 +1,61 @@
+// file      : backend-elements/indentation/buffer.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_INDENTATION_BUFFER_HXX
+#define BACKEND_ELEMENTS_INDENTATION_BUFFER_HXX
+
+#include <backend-elements/types.hxx>
+
+#include <string>
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+    template <typename C>
+    class Buffer: public NonCopyable
+    {
+    public:
+      struct Write {};
+
+    public:
+      virtual
+      ~Buffer ()
+      {
+      }
+
+    public:
+      typedef
+      std::char_traits<C>
+      Traits;
+
+      typedef
+      typename Traits::char_type
+      AsChar;
+
+      typedef
+      typename Traits::int_type
+      AsInt;
+
+    public:
+      virtual AsInt
+      put (AsChar c) = 0;
+
+      // Unbuffer flushes internal formatting buffers (if any).
+      // Note that unbuffer is not exactly flushing since it can
+      // result in formatting errors and in general can not be
+      // called at arbitrary points. Natural use case would be
+      // to call unbuffer at the end of the stream when no more
+      // data is expected.
+      //
+      virtual Void
+      unbuffer () = 0;
+    };
+  }
+}
+
+#include <backend-elements/indentation/buffer.txx>
+
+#endif  // BACKEND_ELEMENTS_INDENTATION_BUFFER_HXX
diff --git a/libbackend-elements/backend-elements/indentation/buffer.txx b/libbackend-elements/backend-elements/indentation/buffer.txx
new file mode 100644
index 0000000..57ba7ab
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/buffer.txx
@@ -0,0 +1,12 @@
+// file      : backend-elements/indentation/buffer.txx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+  }
+}
+
diff --git a/libbackend-elements/backend-elements/indentation/clip.hxx b/libbackend-elements/backend-elements/indentation/clip.hxx
new file mode 100644
index 0000000..068ed0d
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/clip.hxx
@@ -0,0 +1,173 @@
+// file      : backend-elements/indentation/clip.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_INDENTATION_CLIP_HXX
+#define BACKEND_ELEMENTS_INDENTATION_CLIP_HXX
+
+#include <backend-elements/types.hxx>
+
+#include <backend-elements/indentation/buffer.hxx>
+
+#include <ostream>
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+    template <typename C>
+    class ToStreambufAdapter: public std::basic_streambuf<C>,
+                              public NonCopyable
+    {
+    public:
+      typedef
+      typename std::basic_streambuf<C>::traits_type
+      Traits;
+
+      typedef
+      typename std::basic_streambuf<C>::char_type
+      AsChar;
+
+      typedef
+      typename std::basic_streambuf<C>::int_type
+      AsInt;
+
+    public:
+      ToStreambufAdapter (Buffer<C>& buffer)
+          : buffer_ (buffer)
+      {
+      }
+
+      virtual AsInt
+      overflow (AsInt ch)
+      {
+        return buffer_.put (Traits::to_char_type (ch));
+      }
+
+      virtual Int
+      sync ()
+      {
+        return 0;
+      }
+
+    private:
+      Buffer<C>& buffer_;
+    };
+
+
+    template <typename C>
+    class FromStreambufAdapter: public Buffer<C>
+    {
+    public:
+      typedef
+      typename Buffer<C>::Traits
+      Traits;
+
+      typedef
+      typename Buffer<C>::AsChar
+      AsChar;
+
+      typedef
+      typename Buffer<C>::AsInt
+      AsInt;
+
+      typedef
+      typename Buffer<C>::Write
+      Write;
+
+    public:
+      FromStreambufAdapter (std::basic_streambuf<C>& b)
+          : buffer_ (b)
+      {
+      }
+
+      virtual AsInt
+      put (AsChar ch)
+      {
+        return buffer_.sputc (ch);
+      }
+
+      virtual Void
+      unbuffer ()
+      {
+        try
+        {
+          if (buffer_.pubsync () == 0) return;
+        }
+        catch (std::ios_base::failure const&)
+        {
+        }
+
+        throw Write ();
+      }
+
+    private:
+      std::basic_streambuf<C>& buffer_;
+    };
+
+
+    template <template <typename> class Buffer, typename C = Char>
+    class Clip: public NonCopyable
+    {
+    public:
+      Clip (std::basic_ostream<C>& os)
+          : os_ (os),
+            prev_ (os_.rdbuf ()),
+            from_adapter_ (*prev_),
+            buffer_ (from_adapter_),
+            to_adapter_ (buffer_)
+      {
+        os_.rdbuf (&to_adapter_);
+      }
+
+      /*
+      template <typename Arg0>
+      Clip (std::basic_ostream<C>& os, Arg0 a0)
+          : os_ (os),
+            prev_ (os_.rdbuf ()),
+            from_adapter_ (*prev_),
+            buffer_ (from_adapter_, a0),
+            to_adapter_ (buffer_)
+      {
+        os_.rdbuf (&to_adapter_);
+      }
+      */
+
+      ~Clip ()
+      {
+        try
+        {
+          buffer_.unbuffer ();
+        }
+        catch (...)
+        {
+          os_.rdbuf (prev_);
+          throw;
+        }
+
+        os_.rdbuf (prev_);
+      }
+
+      Buffer<C>&
+      buffer ()
+      {
+        return buffer_;
+      }
+
+    private:
+      std::basic_ostream<C>& os_;
+      std::basic_streambuf<C>* prev_;
+
+      FromStreambufAdapter<C> from_adapter_;
+
+      Buffer<C> buffer_;
+
+      ToStreambufAdapter<C> to_adapter_;
+    };
+  }
+}
+
+#include <backend-elements/indentation/clip.txx>
+
+#endif  // BACKEND_ELEMENTS_INDENTATION_CLIP_HXX
diff --git a/libbackend-elements/backend-elements/indentation/clip.txx b/libbackend-elements/backend-elements/indentation/clip.txx
new file mode 100644
index 0000000..58112f1
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/clip.txx
@@ -0,0 +1,12 @@
+// file      : backend-elements/indentation/clip.txx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+  }
+}
+
diff --git a/libbackend-elements/backend-elements/indentation/cxx.hxx b/libbackend-elements/backend-elements/indentation/cxx.hxx
new file mode 100644
index 0000000..f10341a
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/cxx.hxx
@@ -0,0 +1,1016 @@
+// file      : backend-elements/indentation/cxx.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_INDENTATION_CXX_HXX
+#define BACKEND_ELEMENTS_INDENTATION_CXX_HXX
+
+#include <backend-elements/types.hxx>
+#include <backend-elements/indentation/buffer.hxx>
+
+#include <cult/containers/set.hxx>
+#include <cult/containers/stack.hxx>
+#include <cult/containers/deque.hxx>
+
+#include <locale>
+
+// #include <iostream> // @@ tmp
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+    template <typename C>
+    class CXX: public Buffer<C>/*, public NonCopyable*/
+    {
+    public:
+      typedef
+      typename Buffer<C>::Traits
+      Traits;
+
+      typedef
+      typename Buffer<C>::AsChar
+      AsChar;
+
+      typedef
+      typename Buffer<C>::AsInt
+      AsInt;
+
+      typedef
+      typename Buffer<C>::Write
+      Write;
+
+    public:
+      CXX (Buffer<C>& out)
+          : out_ (out),
+            buffering_ (false),
+            position_ (0),
+            paren_balance_ (0),
+            spaces_ (2),
+            construct_ (Construct::other),
+            lbrace_ ("{"),
+            rbrace_ ("}")
+        // locale_ ("C")
+      {
+        indentation_.push (0);
+
+        single_line_blocks_.insert ("if");
+        single_line_blocks_.insert ("do");
+        single_line_blocks_.insert ("for");
+        single_line_blocks_.insert ("else");
+        single_line_blocks_.insert ("case");
+        single_line_blocks_.insert ("while");
+
+        follow_blocks_.insert ("else");
+        follow_blocks_.insert ("case");
+        follow_blocks_.insert ("catch");
+        follow_blocks_.insert ("default");
+      }
+
+    public:
+      virtual AsInt
+      put (AsChar c)
+      {
+        AsInt result (Traits::to_int_type (c));
+
+        try
+        {
+          // First determine what kind of construct we are in.
+          //
+          typename Construct::Value new_construct (construct_);
+          typename Construct::Value old_construct (construct_);
+
+          switch (c)
+          {
+          case '\n':
+            {
+              if (construct_ == Construct::pp_directive ||
+                  construct_ == Construct::cxx_comment)
+                construct_ = new_construct = Construct::other;
+
+              break;
+            }
+          case '#':
+            {
+              if (construct_ == Construct::other)
+                construct_ = new_construct = Construct::pp_directive;
+
+              break;
+            }
+          case '\"':
+            {
+              if (construct_ != Construct::pp_directive &&
+                  construct_ != Construct::c_comment &&
+                  construct_ != Construct::cxx_comment &&
+                  construct_ != Construct::char_literal)
+              {
+                // We might be in an escape sequence.
+                //
+                Boolean es (!hold_.empty () && hold_.back () == '\\');
+
+                if (es)
+                {
+                  // Scan the hold sequence backwards to figure out if this
+                  // backslash is part of this escape sequence or a preceding
+                  // one.
+                  //
+                  for (typename Hold::ReverseIterator i (hold_.rbegin () + 1),
+                         e (hold_.rend ()); i != e && *i == '\\'; ++i)
+                    es = !es;
+                }
+
+                if (!es)
+                {
+                  // Not an escape sequence.
+                  //
+                  if (construct_ == Construct::string_literal)
+                    new_construct = Construct::other;
+                  else
+                    construct_ = new_construct = Construct::string_literal;
+                }
+              }
+
+              break;
+            }
+          case '\'':
+            {
+              if (construct_ != Construct::pp_directive &&
+                  construct_ != Construct::c_comment &&
+                  construct_ != Construct::cxx_comment &&
+                  construct_ != Construct::string_literal)
+              {
+                // We might be in an escape sequence.
+                //
+                Boolean es (!hold_.empty () && hold_.back () == '\\');
+
+                if (es)
+                {
+                  // Scan the hold sequence backwards to figure out if this
+                  // backslash is part of this escape sequence or a preceding
+                  // one.
+                  //
+                  for (typename Hold::ReverseIterator i (hold_.rbegin () + 1),
+                         e (hold_.rend ()); i != e && *i == '\\'; ++i)
+                    es = !es;
+                }
+
+                if (!es)
+                {
+                  if (construct_ == Construct::char_literal)
+                    new_construct = Construct::other;
+                  else
+                    construct_ = new_construct = Construct::char_literal;
+                }
+              }
+
+              break;
+            }
+          case '/':
+            {
+              if (construct_ == Construct::other)
+              {
+                if (!hold_.empty () && hold_.back () == '/')
+                  construct_ = new_construct = Construct::cxx_comment;
+              }
+
+              if (construct_ == Construct::c_comment)
+              {
+                if (!hold_.empty () && hold_.back () == '*')
+                  construct_ = new_construct = Construct::other;
+              }
+
+              break;
+            }
+          case '*':
+            {
+              if (construct_ == Construct::other)
+              {
+                if (!hold_.empty () && hold_.back () == '/')
+                  construct_ = new_construct = Construct::c_comment;
+              }
+
+              break;
+            }
+          default:
+            {
+              break;
+            }
+          }
+
+          // Special handling of CPP directives.
+          //
+          if (construct_ == Construct::pp_directive)
+          {
+            result = write (c);
+            position_++;
+            return result;
+          }
+
+          //
+          //
+          tokenize (c, old_construct);
+
+
+          // Indentation in parenthesis. We don't need to make sure
+          // we are not in a comments, etc. because we make sure we
+          // don't hold anything in those states.
+          //
+          if (!hold_.empty () && hold_.back () == '(')
+          {
+            unbuffer (); // We don't need to hold it anymore.
+
+            if (c == '\n')
+              indentation_.push (indentation_.top () + spaces_);
+            else
+              indentation_.push (position_);
+          }
+
+
+          //
+          //
+          Boolean defaulting (false);
+
+          switch (c)
+          {
+          case '\n':
+            {
+              if (!indent_block_.empty () && construct_ == Construct::other)
+                indent_block_.top ().newline_ = true;
+
+              hold_.push_back (c);
+              position_ = 0; // Starting a new line.
+
+              break;
+            }
+          case '{':
+            {
+              if (construct_ == Construct::other)
+              {
+                if (!indent_block_.empty ())
+                {
+                  // Pop all the blocks until the one that was indented.
+                  //
+                  while (!indent_block_.top ().indented_)
+                    indent_block_.pop ();
+
+                  if (indentation_.size () > 1)
+                    indentation_.pop ();
+
+                  indent_block_.pop ();
+                }
+
+                ensure_new_line ();
+                output_indentation ();
+                result = write (c);
+                ensure_new_line ();
+
+                indentation_.push (indentation_.top () + spaces_);
+              }
+              else
+                defaulting = true;
+
+              break;
+            }
+          case '}':
+            {
+              if (construct_ == Construct::other)
+              {
+                if (indentation_.size () > 1)
+                  indentation_.pop ();
+
+                // Reduce multiple newlines to one.
+                //
+                while (hold_.size () > 1)
+                {
+                  typename Hold::ReverseIterator i (hold_.rbegin ());
+
+                  if (*i == '\n' && *(i + 1) == '\n')
+                    hold_.pop_back ();
+                  else
+                    break;
+                }
+
+                ensure_new_line ();
+                output_indentation ();
+
+                hold_.push_back (c);
+
+
+                // Add double newline after '}'.
+                //
+                hold_.push_back ('\n');
+                hold_.push_back ('\n');
+                position_ = 0;
+
+                buffering_ = true;
+              }
+              else
+                defaulting = true;
+
+              break;
+            }
+          case ';':
+            {
+              if (construct_ == Construct::other)
+              {
+                // for (;;)
+                //
+                if (!indent_block_.empty () && paren_balance_ == 0)
+                {
+                  // Pop all the blocks until the one that was indented.
+                  //
+                  while (!indent_block_.top ().indented_)
+                    indent_block_.pop ();
+
+                  if (indentation_.size () > 1)
+                    indentation_.pop ();
+
+                  indent_block_.pop ();
+                }
+
+                if (paren_balance_ != 0)
+                {
+                  // We are inside for (;;) statement. Nothing to do here.
+                  //
+                  defaulting = true;
+                }
+                else
+                {
+                  // Handling '};' case.
+                  //
+
+                  Boolean brace (false);
+
+                  if (hold_.size () > 1 && hold_.back () == '\n')
+                  {
+                    Boolean pop_nl (false);
+
+                    for (typename Hold::ReverseIterator
+                           i (hold_.rbegin ()), e (hold_.rend ());
+                         i != e; ++i)
+                    {
+                      if (*i != '\n')
+                      {
+                        if (*i == '}')
+                          brace = pop_nl = true;
+
+                        break;
+                      }
+                    }
+
+                    if (pop_nl)
+                      while (hold_.back () == '\n')
+                        hold_.pop_back ();
+                  }
+
+                  output_indentation ();
+                  result = write (c);
+                  position_++;
+
+                  if (brace)
+                  {
+                    hold_.push_back ('\n');
+                    hold_.push_back ('\n');
+                  }
+
+                  ensure_new_line ();
+                }
+              }
+              else
+                defaulting = true;
+
+              break;
+            }
+          case ' ':
+            {
+              if (construct_ == Construct::other)
+              {
+                // Handling '} foo_;' case.
+                //
+                if (hold_.size () > 1 && hold_.back () == '\n')
+                {
+                  Boolean pop_nl (false);
+
+                  for (typename Hold::ReverseIterator
+                         i (hold_.rbegin ()), e (hold_.rend ());
+                       i != e; ++i)
+                  {
+                    if (*i != '\n')
+                    {
+                      if (*i == '}')
+                        pop_nl = true;
+
+                      break;
+                    }
+                  }
+
+                  if (pop_nl)
+                    while (hold_.back () == '\n')
+                      hold_.pop_back ();
+                }
+              }
+
+              defaulting = true;
+              break;
+            }
+          case '\\':
+            {
+              if (construct_ != Construct::pp_directive &&
+                  construct_ != Construct::c_comment &&
+                  construct_ != Construct::cxx_comment)
+              {
+                output_indentation ();
+                hold_.push_back (c);
+                position_++;
+              }
+              else
+                defaulting = true;
+
+            break;
+
+            }
+          case '(':
+            {
+              if (construct_ == Construct::other)
+              {
+                // Hold it so that we can see what's coming next.
+                //
+                output_indentation ();
+                hold_.push_back (c);
+                position_++;
+                paren_balance_++;
+              }
+              else
+                defaulting = true;
+              break;
+            }
+          case ')':
+            {
+              if (construct_ == Construct::other)
+              {
+                if (indentation_.size () > 1)
+                  indentation_.pop ();
+
+                if (paren_balance_ > 0)
+                  paren_balance_--;
+              }
+
+              defaulting = true;
+              break;
+            }
+          case '/':
+            {
+              if (construct_ == Construct::other)
+              {
+                output_indentation ();
+                hold_.push_back (c);
+                position_++;
+              }
+              else
+                defaulting = true;
+
+              break;
+            }
+          case '*':
+            {
+              if (construct_ == Construct::c_comment)
+              {
+                output_indentation ();
+                hold_.push_back (c);
+                position_++;
+              }
+              else
+                defaulting = true;
+
+              break;
+            }
+          default:
+            {
+              defaulting = true;
+              break;
+            }
+          }
+
+
+          if (defaulting)
+          {
+            output_indentation ();
+            result = write (c);
+            position_++;
+          }
+
+          construct_ = new_construct;
+        }
+        catch (Write const&)
+        {
+          result = Traits::eof ();
+        }
+
+        return result;
+      }
+
+    private:
+      typedef Cult::StringTemplate<C> String;
+
+      Void
+      next_token (String const& old, AsChar c)
+      {
+        //std::cerr << "next token: " << token_
+        //          << "; old token: " << old << std::endl;
+
+        // Handle one line indentation blocks (if, else, etc).
+        //
+        if (single_line_blocks_.find (token_) != single_line_blocks_.end ())
+        {
+          // Only indent sub-blocks if we are on a new line.
+          //
+          Boolean indent (indent_block_.empty () ||
+                          indent_block_.top ().newline_);
+
+          indent_block_.push (IndentBlockInfo (c == '\n', indent));
+
+          if (indent)
+            indentation_.push (indentation_.top () + spaces_);
+        }
+
+        // Keep track of the do ... while construct in order to suppress
+        // the newline after } and before while.
+        //
+        if (old == String ("do") && token_ == lbrace_)
+        {
+          do_while_state_.push (0);
+        }
+
+        if (!do_while_state_.empty ())
+        {
+          if (token_ == lbrace_)
+            do_while_state_.top ()++;
+
+          if (token_ == rbrace_)
+            do_while_state_.top ()--;
+        }
+
+        // Suppress double newline in the "}else", etc., cases.
+        //
+        if (old == rbrace_)
+        {
+          Boolean dw (!do_while_state_.empty () &&
+                      do_while_state_.top () == 0);
+
+          if (follow_blocks_.find (token_) != follow_blocks_.end () || dw)
+          {
+            if (dw)
+              do_while_state_.pop ();
+
+            // Reduce double newline after "}" into a single one.
+            //
+            typename Hold::Iterator i (hold_.end ()), b (hold_.begin ());
+
+            for (--i; i != b; --i)
+            {
+              // See if this is the end of the "}\n\n" sequence.
+              //
+              if (*i == '\n')
+              {
+                --i;
+                if (i != b && *i == '\n')
+                {
+                  --i;
+                  if (*i == '}')
+                  {
+                    ++i;
+                    hold_.erase (i);
+                    break;
+                  }
+                }
+              }
+            }
+          }
+          else if (token_ != rbrace_)
+          {
+            buffering_ = false;
+          }
+        }
+      }
+
+    public:
+      virtual Void
+      unbuffer ()
+      {
+        AsInt result;
+
+        while (!hold_.empty ())
+        {
+          result = out_.put (hold_.front ());
+
+          //@@ failed
+          if (result == Traits::eof ())
+            throw Write ();
+
+          hold_.pop_front ();
+        }
+      }
+
+    private:
+      Void
+      ensure_new_line ()
+      {
+        if (hold_.empty () || hold_.back () != '\n')
+        {
+          hold_.push_back ('\n');
+          position_ = 0; // Starting a new line.
+        }
+      }
+
+
+      Void
+      output_indentation ()
+      {
+        if (!hold_.empty () && hold_.back () == '\n')
+        {
+          for (UnsignedLong i (0); i < indentation_.top (); ++i)
+            write (' ');
+
+          position_ += indentation_.top ();
+        }
+      }
+
+      AsInt
+      write (AsChar c)
+      {
+        hold_.push_back (c);
+
+        if (!buffering_)
+        {
+          AsInt result (Traits::eof ());
+
+          while (!hold_.empty ())
+          {
+            result = out_.put (hold_.front ());
+
+            if (result == Traits::eof ())
+              throw Write ();
+
+            hold_.pop_front ();
+          }
+
+          return result;
+        }
+        else
+          return c;
+      }
+
+    private:
+      struct Construct
+      {
+        enum Value
+        {
+          other,
+          pp_directive,
+          c_comment,
+          cxx_comment,
+          string_literal,
+          char_literal
+        };
+      };
+
+      Void
+      tokenize (AsChar c, typename Construct::Value old)
+      {
+        //
+        //
+        switch (construct_)
+        {
+        case Construct::pp_directive:
+          {
+            if (old == Construct::other) // Start PP directive
+              retire (c);
+
+            return;
+          }
+        case Construct::c_comment:
+          {
+            if (old == Construct::other) // Start C comment.
+              lexeme_.clear ();
+
+            return;
+          }
+        case Construct::cxx_comment:
+          {
+            if (old == Construct::other) // Start C++ comment.
+              lexeme_.clear ();
+
+            return;
+          }
+        case Construct::string_literal:
+          {
+            if (old == Construct::other) // Start string literal
+              retire (c);
+
+            lexeme_ += c;
+            return;
+          }
+        case Construct::char_literal:
+          {
+            if (old == Construct::other) // Start char literal
+              retire (c);
+
+            lexeme_ += c;
+            return;
+          }
+        default:
+          break;
+        }
+
+        // construct_ == other
+        //
+        switch (old)
+        {
+        case Construct::pp_directive:
+          {
+            // End  PP directive (newline).
+            //
+            return;
+          }
+        case Construct::c_comment:
+          {
+            // End  C comment.
+            //
+            return;
+          }
+        case Construct::cxx_comment:
+          {
+            // End  C++ comment (newline).
+            //
+            return;
+          }
+        case Construct::string_literal:
+          {
+            // End string literal (").
+            //
+            lexeme_ += c;
+            return;
+          }
+        case Construct::char_literal:
+          {
+            // End char literal (').
+            //
+            lexeme_ += c;
+            return;
+          }
+        default:
+          break;
+        }
+
+
+        // construct_ == old == other
+        //
+
+        /*
+
+        The code below is equivalent to this (simpler) code which is
+        unfortunately not fast enough.
+
+        using std::isalpha;
+        using std::isalnum;
+        using std::isdigit;
+        using std::isspace;
+
+        if (c == '_' || isalpha (c, locale_))
+        {
+          if (lexeme_.empty () ||
+              lexeme_[0] == '_' || isalpha (lexeme_[0], locale_))
+            lexeme_ += c;
+          else
+          {
+            retire (c);
+            lexeme_ += c;
+          }
+        }
+        else if (isdigit (c, locale_))
+        {
+          if (lexeme_.empty () ||
+              lexeme_[0] == '_' || isalnum (lexeme_[0], locale_))
+            lexeme_ += c;
+          else
+          {
+            retire (c);
+            lexeme_ += c;
+          }
+        }
+        else // Delimiters
+        {
+          retire (c);
+
+          if (!isspace (c, locale_))
+            lexeme_ += c;
+        }
+        */
+
+        switch (char_class (c))
+        {
+        case CharClass::alpha:
+          {
+            if (lexeme_.empty () ||
+                char_class (lexeme_[0]) == CharClass::alpha)
+              lexeme_ += c;
+            else
+            {
+              retire (c);
+              lexeme_ += c;
+            }
+            break;
+          }
+        case CharClass::digit:
+          {
+            if (lexeme_.empty ())
+              lexeme_ += c;
+            else
+            {
+              typename CharClass::Value cc (char_class (lexeme_[0]));
+
+              if (cc == CharClass::alpha || cc == CharClass::digit)
+                lexeme_ += c;
+              else
+              {
+                retire (c);
+                lexeme_ += c;
+              }
+            }
+            break;
+          }
+        case CharClass::op_punc:
+          {
+            retire (c);
+            lexeme_ += c;
+            break;
+          }
+        case CharClass::space:
+          {
+            retire (c);
+            break;
+          }
+        }
+      }
+
+      struct CharClass
+      {
+        enum Value
+        {
+          alpha,   // Alpha + '_'.
+          digit,
+          op_punc, // Operator or punctuation.
+          space
+        };
+
+      };
+
+      typename CharClass::Value
+      char_class (C c)
+      {
+        switch (c)
+        {
+        case '0':
+        case '1':
+        case '2':
+        case '3':
+        case '4':
+        case '5':
+        case '6':
+        case '7':
+        case '8':
+        case '9':
+          return CharClass::digit;
+
+        case '!':
+        case '%':
+        case '^':
+        case '&':
+        case '*':
+        case '(':
+        case ')':
+        case '-':
+        case '+':
+        case '=':
+        case '{':
+        case '}':
+        case '|':
+        case '~':
+        case '[':
+        case ']':
+        case '\\':
+        case ';':
+        case '\'':
+        case ':':
+        case '"':
+        case '<':
+        case '>':
+        case '?':
+        case ',':
+        case '.':
+        case '/':
+          return CharClass::op_punc;
+
+        case ' ':
+        case '\n':
+        case '\t':
+        case '\f':
+        case '\r':
+        case '\v':
+          return CharClass::space;
+
+        default:
+          return CharClass::alpha;
+        }
+      }
+
+
+      Void
+      retire (AsChar c)
+      {
+        if (!lexeme_.empty ())
+        {
+          token_.swap (lexeme_);
+          next_token (lexeme_, c);
+          lexeme_.clear ();
+        }
+      }
+
+    private:
+      Buffer<C>& out_;
+      Boolean buffering_; // True if write() should buffer the char.
+      UnsignedLong position_; // Current position on the line.
+      UnsignedLong paren_balance_; // ( ) balance.
+      Cult::Containers::Stack<UnsignedLong> indentation_;
+      UnsignedLong spaces_;
+
+      Boolean suppress_nl_;
+
+      //@@ gcc bug# 18304
+      //
+      typename Construct::Value construct_;
+
+      // Special state stach for the do-while construct. The presence
+      // of an element in the stack indicates that we are in a braced
+      // do-while construct. The value of the element is the brace
+      // balance.
+      Cult::Containers::Stack<UnsignedLong> do_while_state_;
+
+      typedef
+      Cult::Containers::Deque<AsInt>
+      Hold;
+
+      Hold hold_;
+
+    private:
+      String token_;  // previously fully recognized token
+      String lexeme_; // current lexeme (accumulator)
+
+      // std::locale locale_;
+
+      // Keywords that may be folowed by a single-line block, e.g., if,
+      // else, etc.
+      //
+      Cult::Containers::Set<String> single_line_blocks_;
+
+      // Keywords that may follow (and be related) to a previous block,
+      // e.g., else, case, catch.
+      //
+      Cult::Containers::Set<String> follow_blocks_;
+
+      String lbrace_;
+      String rbrace_;
+
+    private:
+      // Single-line indented blocks such as if, else, while, etc. The
+      // newline flag indicates whether a new line has been seen after
+      // the keyword. This is needed to properly distinguish cases such
+      // as:
+      //
+      // else if (...)
+      //   foo ();
+      //
+      // else
+      //   if (...)
+      //     foo ();
+      //
+      struct IndentBlockInfo
+      {
+        IndentBlockInfo (Boolean newline, Boolean indented)
+            : newline_ (newline), indented_ (indented)
+        {
+        }
+
+        Boolean newline_;
+        Boolean indented_;
+      };
+
+      Cult::Containers::Stack<IndentBlockInfo> indent_block_;
+    };
+  }
+}
+
+#include <backend-elements/indentation/cxx.txx>
+
+#endif  // BACKEND_ELEMENTS_INDENTATION_CXX_HXX
diff --git a/libbackend-elements/backend-elements/indentation/cxx.txx b/libbackend-elements/backend-elements/indentation/cxx.txx
new file mode 100644
index 0000000..9acff37
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/cxx.txx
@@ -0,0 +1,12 @@
+// file      : backend-elements/indentation/cxx.txx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+  }
+}
+
diff --git a/libbackend-elements/backend-elements/indentation/idl.hxx b/libbackend-elements/backend-elements/indentation/idl.hxx
new file mode 100644
index 0000000..e5a234f
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/idl.hxx
@@ -0,0 +1,290 @@
+// file      : backend-elements/indentation/idl.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_INDENTATION_IDL_HXX
+#define BACKEND_ELEMENTS_INDENTATION_IDL_HXX
+
+#include <backend-elements/types.hxx>
+#include <backend-elements/indentation/buffer.hxx>
+
+#include <cult/containers/deque.hxx>
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+    template <typename C>
+    class IDL: public Buffer<C>, public NonCopyable
+    {
+    public:
+      typedef
+      typename Buffer<C>::Traits
+      Traits;
+
+      typedef
+      typename Buffer<C>::AsChar
+      AsChar;
+
+      typedef
+      typename Buffer<C>::AsInt
+      AsInt;
+
+      typedef
+      typename Buffer<C>::Write
+      Write;
+
+    public:
+      IDL (Buffer<C>& out)
+          : out_ (out),
+            indentation_ (0),
+            spaces_ (2),
+            construct_ (Construct::other)
+      {
+      }
+
+    public:
+      virtual AsInt
+      put (AsChar c)
+      {
+        AsInt result (Traits::to_int_type (c));
+
+        try
+        {
+          Boolean defaulting (false);
+
+          switch (c)
+          {
+          case '\n':
+            {
+              hold_.push_back (c);
+              break;
+            }
+          case '{':
+            {
+              ensure_new_line ();
+              output_indentation ();
+              result = write (c);
+              ensure_new_line ();
+              indentation_++;
+              break;
+            }
+          case '}':
+            {
+              if (indentation_ > 0) indentation_--;
+
+              // Reduce multiple newlines to one.
+              //
+              while (hold_.size () > 1)
+              {
+                typename Hold::ReverseIterator i (hold_.rbegin ());
+
+                if (*i == '\n' && *(i + 1) == '\n')
+                  hold_.pop_back ();
+                else
+                  break;
+              }
+
+              ensure_new_line ();
+              output_indentation ();
+
+              hold_.push_back (c);
+
+              // Add double newline after '}'.
+              //
+              hold_.push_back ('\n');
+              hold_.push_back ('\n');
+
+
+              break;
+            }
+          case ';':
+            {
+              // Handling '};' case.
+              //
+
+              Boolean brace (false);
+
+              if (hold_.size () > 1 && hold_.back () == '\n')
+              {
+                Boolean pop_nl (false);
+
+                for (typename Hold::ReverseIterator
+                       i (hold_.rbegin ()), e (hold_.rend ()); i != e; ++i)
+                {
+                  if (*i != '\n')
+                  {
+                    if (*i == '}')
+                      brace = pop_nl = true;
+
+                    break;
+                  }
+                }
+
+                if (pop_nl)
+                  while (hold_.back () == '\n')
+                    hold_.pop_back ();
+              }
+
+              output_indentation ();
+              result = write (c);
+
+              if (brace)
+              {
+                hold_.push_back ('\n');
+                hold_.push_back ('\n');
+              }
+
+              if (construct_ != Construct::string_literal &&
+                  construct_ != Construct::char_literal)
+              {
+                ensure_new_line ();
+              }
+              break;
+            }
+          case '\\':
+            {
+              hold_.push_back (c);
+              break;
+            }
+          case '\"':
+            {
+              if (hold_.empty () || hold_.back () != '\\')
+              {
+                // not escape sequence
+                if (construct_ == Construct::string_literal)
+                {
+                  construct_ = Construct::other;
+                }
+                else construct_ = Construct::string_literal;
+              }
+
+              defaulting = true;
+              break;
+            }
+          case '\'':
+            {
+              if (hold_.empty () || hold_.back () != '\\')
+              {
+                // not escape sequence
+                if (construct_ == Construct::char_literal)
+                {
+                  construct_ = Construct::other;
+                }
+                else construct_ = Construct::char_literal;
+              }
+
+              defaulting = true;
+              break;
+            }
+          default:
+            {
+              defaulting = true;
+              break;
+            }
+          }
+
+          if (defaulting)
+          {
+            output_indentation ();
+            result = write (c);
+          }
+        }
+        catch (Write const&)
+        {
+          result = Traits::eof ();
+        }
+
+        return result;
+      }
+
+      virtual Void
+      unbuffer ()
+      {
+        AsInt result;
+
+        while (!hold_.empty ())
+        {
+          result = out_.put (hold_.front ());
+
+          //@@ failed
+          if (result == Traits::eof ())
+            throw Write ();
+
+          hold_.pop_front ();
+        }
+      }
+
+    private:
+      Void
+      ensure_new_line ()
+      {
+        if (hold_.empty () || hold_.back () != '\n')
+          hold_.push_back ('\n');
+      }
+
+
+      Void
+      output_indentation ()
+      {
+        if (!hold_.empty () && hold_.back () == '\n')
+          for (UnsignedLong i (0); i < indentation_ * spaces_; ++i)
+            write (' ');
+      }
+
+      AsInt
+      write (AsChar c)
+      {
+        hold_.push_back (c);
+
+        AsInt result (Traits::eof ());
+
+        while (!hold_.empty ())
+        {
+          result = out_.put (hold_.front ());
+
+          if (result == Traits::eof ())
+            throw Write ();
+
+          hold_.pop_front ();
+        }
+
+        return result;
+      }
+
+
+    private:
+
+      Buffer<C>& out_;
+      UnsignedLong indentation_;
+      UnsignedLong spaces_;
+
+      Boolean suppress_nl_;
+
+      struct Construct
+      {
+        enum Value
+        {
+          other,
+          string_literal,
+          char_literal
+        };
+      };
+
+      //@@ gcc bug# 18304
+      //
+      typename Construct::Value construct_;
+
+      typedef
+      Cult::Containers::Deque<AsInt>
+      Hold;
+
+      Hold hold_;
+    };
+  }
+}
+
+#include <backend-elements/indentation/idl.txx>
+
+#endif  // BACKEND_ELEMENTS_INDENTATION_IDL_HXX
diff --git a/libbackend-elements/backend-elements/indentation/idl.txx b/libbackend-elements/backend-elements/indentation/idl.txx
new file mode 100644
index 0000000..6ddc63e
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/idl.txx
@@ -0,0 +1,11 @@
+// file      : backend-elements/indentation/idl.txx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+  }
+}
diff --git a/libbackend-elements/backend-elements/indentation/sloc.hxx b/libbackend-elements/backend-elements/indentation/sloc.hxx
new file mode 100644
index 0000000..57e6989
--- /dev/null
+++ b/libbackend-elements/backend-elements/indentation/sloc.hxx
@@ -0,0 +1,277 @@
+// file      : backend-elements/indentation/sloc.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_INDENTATION_SLOC_HXX
+#define BACKEND_ELEMENTS_INDENTATION_SLOC_HXX
+
+#include <backend-elements/types.hxx>
+#include <backend-elements/indentation/buffer.hxx>
+
+#include <cctype>
+#include <iostream> //@@ tmp
+
+namespace BackendElements
+{
+  namespace Indentation
+  {
+    template <typename C>
+    class SLOC: public Buffer<C>/*, public NonCopyable*/
+    {
+    public:
+      typedef
+      typename Buffer<C>::Traits
+      Traits;
+
+      typedef
+      typename Buffer<C>::AsChar
+      AsChar;
+
+      typedef
+      typename Buffer<C>::AsInt
+      AsInt;
+
+      typedef
+      typename Buffer<C>::Write
+      Write;
+
+    public:
+      SLOC (Buffer<C>& out)
+          : out_ (out),
+            count_ (0),
+            prev_ ('\0'),
+            code_counted_ (false),
+            construct_ (Construct::code)
+      {
+      }
+
+      UnsignedLong
+      count () const
+      {
+        return count_;
+      }
+
+    public:
+      virtual AsInt
+      put (AsChar c)
+      {
+        typename Construct::Value old (construct_);
+
+        switch (construct_)
+        {
+        case Construct::code:
+          {
+            code (c);
+            break;
+          }
+        case Construct::c_comment:
+          {
+            c_comment (c);
+            break;
+          }
+        case Construct::cxx_comment:
+          {
+            cxx_comment (c);
+            break;
+          }
+        case Construct::char_literal:
+          {
+            char_literal (c);
+            break;
+          }
+        case Construct::string_literal:
+          {
+            string_literal (c);
+            break;
+          }
+        }
+
+        // There are cases when a previous character has been already
+        // 'used' and therefore can not be used again. Good example
+        // would be '/* *//'. Here, the second slash doesn't start
+        // C++ comment since it was already used by C comment.
+        //
+        // To account for this we are going to set prev_ to '\0' when
+        // the mode changes.
+        //
+
+        prev_ = (old == construct_) ? c : '\0';
+
+        return out_.put (c);
+      }
+
+      virtual Void
+      unbuffer ()
+      {
+      }
+
+    private:
+      Void
+      code (AsChar c)
+      {
+        bool count (true);
+
+        switch (c)
+        {
+        case '/':
+          {
+            if (prev_ == '/')
+            {
+              construct_ = Construct::cxx_comment;
+              count = false;
+            }
+            else
+            {
+              // This slash can be a beginning of a comment but we
+              // yet have no way to know. Will have to examine it later
+              // (see below).
+              //
+              count = false;
+            }
+
+            break;
+          }
+        case '*':
+          {
+            if (prev_ == '/')
+            {
+              construct_ = Construct::c_comment;
+              count = false;
+            }
+            break;
+          }
+        case '\'':
+          {
+            construct_ = Construct::char_literal;
+            break;
+          }
+        case '"':
+          {
+            construct_ = Construct::string_literal;
+            break;
+          }
+        case '\n':
+          {
+            code_counted_ = false; // reset for a new line
+            count = false;
+            break;
+          }
+        default:
+          {
+            if (std::isspace (c))
+              count = false;
+            break;
+          }
+        }
+
+        // The second condition here accounts for the fact that we cannot
+        // count '/' right away since it can be a beginning of a comment.
+        //
+        if (!code_counted_ &&
+            (count || (prev_ == '/' && construct_ == Construct::code)))
+        {
+          //std::wcerr << "detected code @ " << c << std::endl;
+          count_++;
+          code_counted_ = true;
+        }
+      }
+
+      Void
+      c_comment (AsChar c)
+      {
+        switch (c)
+        {
+        case '/':
+          {
+            if (prev_ == '*')
+              construct_ = Construct::code;
+            break;
+          }
+        case '\n':
+          {
+            code_counted_ = false; // reset for a new line
+            break;
+          }
+        }
+      }
+
+      Void
+      cxx_comment (AsChar c)
+      {
+        switch (c)
+        {
+        case '\n':
+          {
+            construct_ = Construct::code;
+            code_counted_ = false; // reset for a new line
+            break;
+          }
+        }
+      }
+
+      Void
+      char_literal (AsChar c)
+      {
+        switch (c)
+        {
+        case '\'':
+          {
+            if (prev_ != '\\')
+              construct_ = Construct::code;
+            break;
+          }
+        }
+      }
+
+      Void
+      string_literal (AsChar c)
+      {
+        switch (c)
+        {
+        case '"':
+          {
+            if (prev_ != '\\')
+              construct_ = Construct::code;
+            break;
+          }
+        case '\n':
+          {
+            /*@@ Should I count multi-line string literal as multiple SLOC? */
+            break;
+          }
+        }
+      }
+
+    private:
+      Buffer<C>& out_;
+      UnsignedLong count_;
+
+      AsChar prev_; // previous character or '\0'
+
+      struct Construct
+      {
+        enum Value
+        {
+          code,
+          c_comment,
+          cxx_comment,
+          char_literal,
+          string_literal
+        };
+      };
+
+      // code
+      //
+      bool code_counted_;
+
+      //@@ gcc bug# 18304
+      //
+      typename Construct::Value construct_;
+    };
+  }
+}
+
+//#include <backend-elements/indentation/sloc.txx>
+
+#endif  // BACKEND_ELEMENTS_INDENTATION_SLOC_HXX
diff --git a/libbackend-elements/backend-elements/makefile b/libbackend-elements/backend-elements/makefile
new file mode 100644
index 0000000..70a3e4a
--- /dev/null
+++ b/libbackend-elements/backend-elements/makefile
@@ -0,0 +1,63 @@
+# file      : backend-elements/makefile
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../build/bootstrap.make
+
+cxx_tun   :=
+cxx_obj   := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o))
+cxx_od    := $(cxx_obj:.o=.o.d)
+
+backend_elements.l             := #$(out_base)/backend-elements.l
+backend_elements.l.cpp-options := $(out_base)/backend-elements.l.cpp-options
+
+clean     := $(out_base)/.clean
+
+
+# Secure default target.
+#
+$(backend_elements.l.cpp-options):
+#$(backend_elements.l):
+
+
+# Imports.
+#
+$(call import,\
+  $(scf_root)/import/libcult/stub.make,\
+  l: cult.l,cpp-options: cult.l.cpp-options)
+
+$(call import,\
+  $(scf_root)/import/libboost/regex/stub.make,\
+  l: re.l,cpp-options: re.l.cpp-options)
+
+
+# Build.
+#
+#$(backend_elements.l): $(cxx_obj) $(cult.l)
+
+#$(cxx_obj): $(backend_elements.l.cpp-options)
+
+$(backend_elements.l.cpp-options): value := -I$(src_root)
+$(backend_elements.l.cpp-options): $(re.l.cpp-options) $(cult.l.cpp-options)
+
+#$(call include-dep,$(cxx_od))
+
+
+# Convenience alias for default target.
+#
+$(out_base)/: $(backend_elements.l.cpp-options)
+
+
+# Clean.
+#
+#$(BackendElements.l).clean \
+
+$(clean): $(addsuffix .cxx.clean,$(cxx_obj)) \
+          $(backend_elements.l.cpp-options).clean
+
+
+# How to.
+#
+$(call include,$(bld_root)/cxx/o-l.make)
+$(call include,$(bld_root)/cxx/cxx-o.make)
diff --git a/libbackend-elements/backend-elements/regex.hxx b/libbackend-elements/backend-elements/regex.hxx
new file mode 100644
index 0000000..9dc6024
--- /dev/null
+++ b/libbackend-elements/backend-elements/regex.hxx
@@ -0,0 +1,208 @@
+// file      : backend-elements/regex.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_REGEX_HXX
+#define BACKEND_ELEMENTS_REGEX_HXX
+
+#include <ostream>
+
+#include <boost/regex.hpp>
+
+#include <backend-elements/types.hxx>
+
+namespace BackendElements
+{
+  namespace Regex
+  {
+    template <typename C>
+    struct Format
+    {
+      Format (StringTemplate<C> const& expression,
+              StringTemplate<C> const& description)
+          : expression_ (expression), description_ (description)
+      {
+      }
+
+      StringTemplate<C> const&
+      expression () const
+      {
+        return expression_;
+      }
+
+      StringTemplate<C> const&
+      description () const
+      {
+        return description_;
+      }
+
+    private:
+      StringTemplate<C> expression_;
+      StringTemplate<C> description_;
+    };
+
+    // Regex pattern.
+    //
+    template <typename C>
+    struct Pattern
+    {
+      Pattern ()
+      {
+      }
+
+      Pattern (Char const* p)
+      {
+        init (StringTemplate<C> (p));
+      }
+
+      Pattern (StringTemplate<C> const& p)
+      {
+        init (p);
+      }
+
+      Pattern&
+      operator= (Char const* p)
+      {
+        init (StringTemplate<C> (p));
+        return *this;
+      }
+
+      Pattern&
+      operator= (StringTemplate<C> const& p)
+      {
+        init (p);
+        return *this;
+      }
+
+    public:
+      Boolean
+      match (StringTemplate<C> const& s) const
+      {
+        return regex_match (s, pat_, boost::format_all);
+      }
+
+      StringTemplate<C>
+      merge (StringTemplate<C> const& sub,
+             StringTemplate<C> const& s,
+             Boolean first_only = false) const
+      {
+        if (first_only)
+          return regex_merge (
+            s, pat_, sub, boost::format_all | boost::format_first_only);
+        else
+          return regex_merge ( s, pat_, sub, boost::format_all);
+      }
+
+    public:
+      Boolean
+      empty () const
+      {
+        return pat_.empty ();
+      }
+
+    public:
+      boost::basic_regex<C> const&
+      impl_pattern () const
+      {
+        return pat_;
+      }
+
+    private:
+      Void
+      init (StringTemplate<C> const& r);
+
+    private:
+      boost::basic_regex<C> pat_;
+    };
+
+    template <typename C1, typename C2>
+    inline std::basic_ostream<C1>&
+    operator<< (std::basic_ostream<C1>& os, Pattern<C2> const& p)
+    {
+      return os << p.impl_pattern ().str ().c_str ();
+    }
+
+    // Regex expression: '/pattern/substitution/'.
+    //
+    template <typename C>
+    struct Expression
+    {
+      Expression ()
+      {
+      }
+
+      // Expression is of the form /regex/format/ where '/' can be
+      // replaced with any delimiter.
+      //
+      Expression (Char const* e)
+      {
+        init (StringTemplate<C> (e));
+      }
+
+      Expression (StringTemplate<C> const& e)
+      {
+        init (e);
+      }
+
+      Expression&
+      operator= (Char const* e)
+      {
+        init (StringTemplate<C> (e));
+        return *this;
+      }
+
+      Expression&
+      operator= (StringTemplate<C> const& e)
+      {
+        init (e);
+        return *this;
+      }
+
+    public:
+      Boolean
+      match (StringTemplate<C> const& s) const
+      {
+        return pat_.match (s);
+      }
+
+      StringTemplate<C>
+      merge (StringTemplate<C> const& s, Boolean first_only = false) const
+      {
+        return pat_.merge (sub_, s, first_only);
+      }
+
+    public:
+      const Pattern<C>&
+      pattern () const
+      {
+        return pat_;
+      }
+
+      const StringTemplate<C>&
+      substitution () const
+      {
+        return sub_;
+      }
+
+    public:
+      Boolean
+      empty () const
+      {
+        return pat_.empty () && sub_.empty ();
+      }
+
+    private:
+      Void
+      init (StringTemplate<C> const& r);
+
+    private:
+      Pattern<C> pat_;
+      StringTemplate<C> sub_;
+    };
+  }
+}
+
+#include <backend-elements/regex.txx>
+
+#endif  // BACKEND_ELEMENTS_REGEX_HXX
diff --git a/libbackend-elements/backend-elements/regex.txx b/libbackend-elements/backend-elements/regex.txx
new file mode 100644
index 0000000..897e0e8
--- /dev/null
+++ b/libbackend-elements/backend-elements/regex.txx
@@ -0,0 +1,52 @@
+// file      : backend-elements/regex.txx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+namespace BackendElements
+{
+  namespace Regex
+  {
+    template <typename C>
+    Void Pattern<C>::
+    init (StringTemplate<C> const& r)
+    {
+      try
+      {
+        pat_ = r;
+      }
+      catch (boost::regex_error const& e)
+      {
+        throw Format<C> (r, e.what ());
+      }
+    }
+
+    //
+    //
+    template <typename C>
+    Void Expression<C>::
+    init (StringTemplate<C> const& r)
+    {
+      typedef StringTemplate<C> String;
+
+      if (r.empty ())
+        throw Format<C> (r, "empty expression");
+
+      C d (r[0]);
+
+      Size first (0);
+      Size middle (r.find (d, first + 1));
+
+      if (middle == String::npos)
+        throw Format<C> (r, "missing second pattern-substitution separator");
+
+      Size last (r.find (d, middle + 1));
+
+      if (last == String::npos)
+        throw Format<C> (r, "missing third pattern-substitution separator");
+
+      pat_ = String (r, first + 1, middle - first - 1);
+      sub_.assign (r, middle + 1, last - middle - 1);
+    }
+  }
+}
diff --git a/libbackend-elements/backend-elements/types.hxx b/libbackend-elements/backend-elements/types.hxx
new file mode 100644
index 0000000..f309f5d
--- /dev/null
+++ b/libbackend-elements/backend-elements/types.hxx
@@ -0,0 +1,16 @@
+// file      : backend-elements/types.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef BACKEND_ELEMENTS_TYPES_HXX
+#define BACKEND_ELEMENTS_TYPES_HXX
+
+#include <cult/types.hxx>
+
+namespace BackendElements
+{
+  using namespace Cult::Types;
+}
+
+#endif  // BACKEND_ELEMENTS_TYPES_HXX
diff --git a/libbackend-elements/build/bootstrap.make b/libbackend-elements/build/bootstrap.make
new file mode 100644
index 0000000..17981a7
--- /dev/null
+++ b/libbackend-elements/build/bootstrap.make
@@ -0,0 +1,46 @@
+# file      : build/bootstrap.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+project_name := libbackend-elements
+
+# First try to include the bundled bootstrap.make if it exist. If that
+# fails, let make search for the external bootstrap.make.
+#
+build := build-0.3
+
+-include $(dir $(lastword $(MAKEFILE_LIST)))../../$(build)/bootstrap.make
+
+ifeq ($(patsubst %build/bootstrap.make,,$(lastword $(MAKEFILE_LIST))),)
+include $(build)/bootstrap.make
+endif
+
+# Aliases
+#
+.PHONY: $(out_base)/       \
+        $(out_base)/.test  \
+        $(out_base)/.clean
+
+ifdef %interactive%
+
+.PHONY: test clean
+
+test: $(out_base)/.test
+clean: $(out_base)/.clean
+
+ifneq ($(filter $(.DEFAULT_GOAL),test clean),)
+.DEFAULT_GOAL :=
+endif
+
+endif
+
+# Don't include dependency info for certain targets.
+#
+define include-dep
+$(call -include,$1)
+endef
+
+ifneq ($(filter $(MAKECMDGOALS),clean cleandoc disfigure),)
+include-dep =
+endif
diff --git a/libbackend-elements/build/cxx/configuration-dynamic.make b/libbackend-elements/build/cxx/configuration-dynamic.make
new file mode 100644
index 0000000..568ab40
--- /dev/null
+++ b/libbackend-elements/build/cxx/configuration-dynamic.make
@@ -0,0 +1,14 @@
+cxx_id       := gnu
+cxx_optimize := n
+cxx_debug    := n
+cxx_rpath    := n
+cxx_pp_extra_options := $(CPPFLAGS)
+cxx_extra_options    := $(CXXFLAGS)
+cxx_ld_extra_options := $(LDFLAGS)
+cxx_extra_libs       := $(LIBS)
+
+r := $(shell echo $(LDFLAGS) | sed -e 's/-L *\([^ ]*\)/-L\1/g')
+r := $(patsubst -L%,%,$(filter -L%,$(r)))
+r := $(shell echo $(r) | sed -e 's/ /:/g')
+
+cxx_extra_lib_paths  := $(r)
diff --git a/libbackend-elements/build/cxx/gnu/configuration-dynamic.make b/libbackend-elements/build/cxx/gnu/configuration-dynamic.make
new file mode 100644
index 0000000..f3fe64d
--- /dev/null
+++ b/libbackend-elements/build/cxx/gnu/configuration-dynamic.make
@@ -0,0 +1,8 @@
+ifneq ($(CXX),)
+cxx_gnu := $(CXX)
+else
+cxx_gnu := g++
+endif
+
+cxx_gnu_libraries := 
+cxx_gnu_optimization_options :=
diff --git a/libbackend-elements/build/export/libbackend-elements/stub.make b/libbackend-elements/build/export/libbackend-elements/stub.make
new file mode 100644
index 0000000..10b4ecb
--- /dev/null
+++ b/libbackend-elements/build/export/libbackend-elements/stub.make
@@ -0,0 +1,13 @@
+# file      : build/import/libbackend-elements/stub.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(call include-once,$(src_root)/backend-elements/makefile,$(out_root))
+
+#$(out_root)/backend-elements/backend-elements.l
+
+$(call export,\
+  l: ,\
+  cpp-options: $(out_root)/backend-elements/backend-elements.l.cpp-options)
+
diff --git a/libbackend-elements/build/import/libbackend-elements/LICENSE b/libbackend-elements/build/import/libbackend-elements/LICENSE
new file mode 120000
index 0000000..5853aae
--- /dev/null
+++ b/libbackend-elements/build/import/libbackend-elements/LICENSE
@@ -0,0 +1 @@
+../../../LICENSE
\ No newline at end of file
diff --git a/libbackend-elements/build/import/libbackend-elements/configuration-rules.make b/libbackend-elements/build/import/libbackend-elements/configuration-rules.make
new file mode 100644
index 0000000..4c65d9e
--- /dev/null
+++ b/libbackend-elements/build/import/libbackend-elements/configuration-rules.make
@@ -0,0 +1,15 @@
+# file      : build/import/libbackend-elements/configuration-rules.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(dcf_root)/import/libbackend-elements/configuration-dynamic.make: | $(dcf_root)/import/libbackend-elements/.
+	$(call message,,$(scf_root)/import/libbackend-elements/configure $@)
+
+ifndef %foreign%
+
+disfigure::
+	$(call message,rm $(dcf_root)/import/libbackend-elements/configuration-dynamic.make,\
+rm -f $(dcf_root)/import/libbackend-elements/configuration-dynamic.make)
+
+endif
diff --git a/libbackend-elements/build/import/libbackend-elements/configure b/libbackend-elements/build/import/libbackend-elements/configure
new file mode 100755
index 0000000..ab5cd7f
--- /dev/null
+++ b/libbackend-elements/build/import/libbackend-elements/configure
@@ -0,0 +1,55 @@
+#! /usr/bin/env bash
+
+# file      : build/import/libbackend-elements/configure
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+
+# $1           - out file
+#
+# bld_root     - build root
+# project_name - project name
+#
+
+source $bld_root/dialog.bash
+
+
+$echo
+$echo "Configuring external dependency on 'libbackend-elements' for '$project_name'."
+$echo
+
+$echo
+$echo "Would you like to configure dependency on the installed version"
+$echo "of 'libbackend-elements' as opposed to the development build?"
+$echo
+
+installed=`read_y_n y`
+
+path=
+
+if [ "$installed" = "n" ]; then
+
+$echo
+$echo "Please enter the src_root for 'libbackend-elements'."
+$echo
+
+src_root=`read_path --directory --exist`
+
+$echo
+$echo "Please enter the out_root for 'libbackend-elements'."
+$echo
+
+out_root=`read_path --directory $src_root`
+
+fi
+
+echo libbackend_elements_installed := $installed   >$1
+
+if [ "$installed" = "n" ]; then
+
+echo src_root := $src_root            >>$1
+echo scf_root := \$\(src_root\)/build >>$1
+echo out_root := $out_root            >>$1
+
+fi
diff --git a/libbackend-elements/build/import/libbackend-elements/stub.make b/libbackend-elements/build/import/libbackend-elements/stub.make
new file mode 100644
index 0000000..839d388
--- /dev/null
+++ b/libbackend-elements/build/import/libbackend-elements/stub.make
@@ -0,0 +1,32 @@
+# file      : build/import/libbackend-elements/stub.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(call include-once,$(scf_root)/import/libbackend-elements/configuration-rules.make,$(dcf_root))
+
+libbackend_elements_installed :=
+
+$(call -include,$(dcf_root)/import/libbackend-elements/configuration-dynamic.make)
+
+ifdef libbackend_elements_installed
+
+ifeq ($(libbackend_elements_installed),y)
+
+#-lbackend-elements
+
+$(call export,l: -lcult -lboost_regex,cpp_options: )
+
+else
+
+# Include export stub.
+#
+$(call include,$(scf_root)/export/libbackend-elements/stub.make)
+
+endif
+
+else
+
+.NOTPARALLEL:
+
+endif
diff --git a/libbackend-elements/build/import/libboost/LICENSE b/libbackend-elements/build/import/libboost/LICENSE
new file mode 100644
index 0000000..3912109
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/LICENSE
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
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+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
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+this License, whose permissions for other licensees extend to the
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+Thus, it is not the intent of this section to claim rights or contest
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+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
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+  3. You may copy and distribute the Program (or a work based on it,
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+
+    a) Accompany it with the complete corresponding machine-readable
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+The source code for a work means the preferred form of the work for
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+
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+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
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+  5. You are not required to accept this License, since you have not
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+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
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+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
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+
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+infringement or for any other reason (not limited to patent issues),
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+license would not permit royalty-free redistribution of the Program by
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+
+If any portion of this section is held invalid or unenforceable under
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+
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+
+This section is intended to make thoroughly clear what is believed to
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+
+  8. If the distribution and/or use of the Program is restricted in
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+Software Foundation.  If the Program does not specify a version number of
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+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
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+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/libbackend-elements/build/import/libboost/configuration-dynamic.make b/libbackend-elements/build/import/libboost/configuration-dynamic.make
new file mode 100644
index 0000000..ab55882
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/configuration-dynamic.make
@@ -0,0 +1,8 @@
+libboost_installed := y
+libboost_suffix := $(BOOST_LIB_SUFFIX)
+
+ifeq ($(BOOST_LINK_SYSTEM),n)
+libboost_system := n
+else
+libboost_system := y
+endif
diff --git a/libbackend-elements/build/import/libboost/configuration-rules.make b/libbackend-elements/build/import/libboost/configuration-rules.make
new file mode 100644
index 0000000..bfe3116
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/configuration-rules.make
@@ -0,0 +1,15 @@
+# file      : build/import/libboost/configuration-rules.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2008 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(dcf_root)/import/libboost/configuration-dynamic.make: | $(dcf_root)/import/libboost/.
+	$(call message,,$(scf_root)/import/libboost/configure $@)
+
+ifndef %foreign%
+
+disfigure::
+	$(call message,rm $(dcf_root)/import/libboost/configuration-dynamic.make,\
+rm -f $(dcf_root)/import/libboost/configuration-dynamic.make)
+
+endif
diff --git a/libbackend-elements/build/import/libboost/configure b/libbackend-elements/build/import/libboost/configure
new file mode 100755
index 0000000..2c62d45
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/configure
@@ -0,0 +1,65 @@
+#! /usr/bin/env bash
+
+# file      : build/import/libboost/configure
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2008 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+
+# $1           - out config file
+#
+# bld_root     - build root
+# project_name - project name
+#
+
+source $bld_root/dialog.bash
+
+
+$echo
+$echo "Configuring external dependency on 'boost libraries' for '$project_name'."
+$echo
+
+$echo
+$echo "Would you like to configure dependency on the installed version"
+$echo "of 'boost libraries' as opposed to the development build?"
+$echo
+
+installed=`read_y_n y`
+
+if [ "$installed" = "n" ]; then
+
+  $echo
+  $echo "Please enter the 'boost' root directory."
+  $echo
+
+  root=`read_path --directory --exist`
+
+  $echo
+  $echo "Please select the library type you would like to use:"
+  $echo
+  $echo "(1) archive"
+  $echo "(2) shared object"
+  $echo
+
+  type=`read_option "archive shared" "shared"`
+fi
+
+$echo
+$echo "Please enter optional suffix that may be embedded into the"
+$echo "boost library names. For example, if your library names are in"
+$echo "the libboost_regex-gcc41-mt-d.so form, then enter -gcc41-mt-d"
+$echo "Otherwise leave this field blank."
+$echo
+
+suffix=
+read -e -p "[]: " suffix
+
+echo libboost_installed := $installed   >$1
+echo libboost_suffix    := $suffix      >>$1
+
+if [ "$installed" = "n" ]; then
+
+  echo libboost_root    := $root    >>$1
+  echo libboost_type    := $type    >>$1
+
+fi
diff --git a/libbackend-elements/build/import/libboost/regex/rules.make b/libbackend-elements/build/import/libboost/regex/rules.make
new file mode 100644
index 0000000..3b5a0f8
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/regex/rules.make
@@ -0,0 +1,38 @@
+# file      : build/import/libboost/regex/rules.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2008 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(dcf_root)/import/libboost/%: root := $(libboost_root)
+
+$(dcf_root)/import/libboost/regex/regex.l: \
+  | $(dcf_root)/import/libboost/regex/.
+
+ifeq ($(libboost_type),archive)
+
+$(dcf_root)/import/libboost/regex/regex.l: \
+  $(libboost_root)/stage/lib/libboost_regex$(libboost_suffix).a
+	@echo $< >$@
+
+else
+
+$(dcf_root)/import/libboost/regex/regex.l: \
+  $(libboost_root)/stage/lib/libboost_regex$(libboost_suffix).so
+	@echo $< >$@
+	@echo rpath:$(root)/stage/lib >>$@
+
+endif
+
+
+$(dcf_root)/import/libboost/regex/regex.l.cpp-options: \
+  | $(dcf_root)/import/libboost/regex/.
+	@echo include: -I$(root) >$@
+
+ifndef %foreign%
+
+disfigure::
+	$(call message,rm $(dcf_root)/import/libboost/regex/regex.l,\
+rm -f $(dcf_root)/import/libboost/regex/regex.l)
+	$(call message,,rm -f $(dcf_root)/import/libboost/regex/regex.l.cpp-options)
+
+endif
diff --git a/libbackend-elements/build/import/libboost/regex/stub.make b/libbackend-elements/build/import/libboost/regex/stub.make
new file mode 100644
index 0000000..2095e33
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/regex/stub.make
@@ -0,0 +1,32 @@
+# file      : build/import/libboost/regex/stub.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2008 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(call include-once,$(scf_root)/import/libboost/configuration-rules.make,$(dcf_root))
+
+libboost_installed :=
+
+$(call -include,$(dcf_root)/import/libboost/configuration-dynamic.make)
+
+ifdef libboost_installed
+
+ifeq ($(libboost_installed),y)
+
+$(call export,l: -lboost_regex$(libboost_suffix),cpp_options: )
+
+else
+
+$(call include-once,$(scf_root)/import/libboost/regex/rules.make,$(dcf_root))
+
+$(call export,\
+  l: $(dcf_root)/import/libboost/regex/regex.l,\
+  cpp-options: $(dcf_root)/import/libboost/regex/regex.l.cpp-options)
+
+endif
+
+else
+
+.NOTPARALLEL:
+
+endif
diff --git a/libbackend-elements/build/import/libboost/version b/libbackend-elements/build/import/libboost/version
new file mode 100644
index 0000000..a918a2a
--- /dev/null
+++ b/libbackend-elements/build/import/libboost/version
@@ -0,0 +1 @@
+0.6.0
diff --git a/libbackend-elements/build/import/libcult/LICENSE b/libbackend-elements/build/import/libcult/LICENSE
new file mode 100644
index 0000000..3912109
--- /dev/null
+++ b/libbackend-elements/build/import/libcult/LICENSE
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/libbackend-elements/build/import/libcult/configuration-dynamic.make b/libbackend-elements/build/import/libcult/configuration-dynamic.make
new file mode 100644
index 0000000..73c92bb
--- /dev/null
+++ b/libbackend-elements/build/import/libcult/configuration-dynamic.make
@@ -0,0 +1,4 @@
+libcult_installed := n
+src_root := $(abspath $(src_root)/../libcult)
+scf_root := $(src_root)/build
+out_root := $(src_root)
diff --git a/libbackend-elements/build/import/libcult/configuration-rules.make b/libbackend-elements/build/import/libcult/configuration-rules.make
new file mode 100644
index 0000000..dc19df4
--- /dev/null
+++ b/libbackend-elements/build/import/libcult/configuration-rules.make
@@ -0,0 +1,15 @@
+# file      : build/import/libcult/configuration-rules.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2009 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(dcf_root)/import/libcult/configuration-dynamic.make: | $(dcf_root)/import/libcult/.
+	$(call message,,$(scf_root)/import/libcult/configure $@)
+
+ifndef %foreign%
+
+disfigure::
+	$(call message,rm $(dcf_root)/import/libcult/configuration-dynamic.make,\
+rm -f $(dcf_root)/import/libcult/configuration-dynamic.make)
+
+endif
diff --git a/libbackend-elements/build/import/libcult/configure b/libbackend-elements/build/import/libcult/configure
new file mode 100755
index 0000000..afa4c9c
--- /dev/null
+++ b/libbackend-elements/build/import/libcult/configure
@@ -0,0 +1,55 @@
+#! /usr/bin/env bash
+
+# file      : build/import/libcult/configure
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2009 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+
+# $1           - out file
+#
+# bld_root     - build root
+# project_name - project name
+#
+
+source $bld_root/dialog.bash
+
+
+$echo
+$echo "Configuring external dependency on 'libcult' for '$project_name'."
+$echo
+
+$echo
+$echo "Would you like to configure dependency on the installed "
+$echo "version of 'libcult' as opposed to the development build?"
+$echo
+
+installed=`read_y_n y`
+
+path=
+
+if [ "$installed" = "n" ]; then
+
+$echo
+$echo "Please enter the src_root for 'libcult'."
+$echo
+
+src_root=`read_path --directory --exist`
+
+$echo
+$echo "Please enter the out_root for 'libcult'."
+$echo
+
+out_root=`read_path --directory $src_root`
+
+fi
+
+echo libcult_installed := $installed   >$1
+
+if [ "$installed" = "n" ]; then
+
+echo src_root := $src_root            >>$1
+echo scf_root := \$\(src_root\)/build >>$1
+echo out_root := $out_root            >>$1
+
+fi
diff --git a/libbackend-elements/build/import/libcult/stub.make b/libbackend-elements/build/import/libcult/stub.make
new file mode 100644
index 0000000..f5f7691
--- /dev/null
+++ b/libbackend-elements/build/import/libcult/stub.make
@@ -0,0 +1,30 @@
+# file      : build/import/libcult/stub.make
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2009 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+$(call include-once,$(scf_root)/import/libcult/configuration-rules.make,$(dcf_root))
+
+libcult_installed :=
+
+$(call -include,$(dcf_root)/import/libcult/configuration-dynamic.make)
+
+ifdef libcult_installed
+
+ifeq ($(libcult_installed),y)
+
+$(call export,l: -lcult,cpp-options: )
+
+else
+
+# Include export stub.
+#
+$(call include,$(scf_root)/export/libcult/stub.make)
+
+endif
+
+else
+
+.NOTPARALLEL:
+
+endif
diff --git a/libbackend-elements/build/ld/configuration-lib-dynamic.make b/libbackend-elements/build/ld/configuration-lib-dynamic.make
new file mode 100644
index 0000000..74c8885
--- /dev/null
+++ b/libbackend-elements/build/ld/configuration-lib-dynamic.make
@@ -0,0 +1,13 @@
+ld_lib_type   := archive
+
+ifneq ($(AR),)
+ld_lib_ar     := $(AR)
+else
+ld_lib_ar     := ar
+endif
+
+ifneq ($(RANLIB),)
+ld_lib_ranlib := $(RANLIB)
+else
+ld_lib_ranlib := ranlib
+endif
diff --git a/libbackend-elements/documentation/BUGS b/libbackend-elements/documentation/BUGS
new file mode 100644
index 0000000..102bf7d
--- /dev/null
+++ b/libbackend-elements/documentation/BUGS
@@ -0,0 +1 @@
+@@ Should properly depend on libboost.
diff --git a/libbackend-elements/documentation/TODO b/libbackend-elements/documentation/TODO
new file mode 100644
index 0000000..68f4d71
--- /dev/null
+++ b/libbackend-elements/documentation/TODO
@@ -0,0 +1 @@
+@@ examples
diff --git a/libbackend-elements/documentation/default.css b/libbackend-elements/documentation/default.css
new file mode 100644
index 0000000..7242a94
--- /dev/null
+++ b/libbackend-elements/documentation/default.css
@@ -0,0 +1,160 @@
+body {
+  font-family      : sans-serif;
+  font-weight      : normal;
+
+  color            : black;
+  background       : white;
+
+  max-width        : 42em;
+  padding          : 2em 2em 2em 3em;
+  margin           : 0 auto;
+}
+
+h1, h2, h3, h4, h5, h6 {
+  font-family      : sans-serif;
+  font-weight      : 500;
+}
+
+h1 { font-size     : 170%; }
+h2 { font-size     : 145%; }
+h3 { font-size     : 125%; }
+h4 { font-size     : 110%; }
+h5 { font-size     : 106%; }
+h6 { font-size     : 100%; }
+
+
+p.indent {
+  margin-left      : 1.5em;
+}
+
+
+/* table of content */
+ul.toc li {
+    padding        : .4em 0em 0em 0em;
+}
+
+
+
+/* list of links */
+ul.menu {
+  list-style-type  : none;
+}
+
+ul.menu li {
+  padding-top      : 0.3em;
+  padding-bottom   : 0.3em;
+}
+
+
+
+/* @@ I should probably use child selector here */
+/* list with multiline list-elements */
+ul.multiline li {
+  padding-top      : 0.4em;
+  padding-bottom   : 0.4em;
+}
+
+ol.multiline li {
+  padding-top      : 0.4em;
+  padding-bottom   : 0.4em;
+}
+
+dl.multiline dd {
+  padding-top      : 0.4em;
+  padding-bottom   : 0.4em;
+}
+
+/* code */
+
+code {
+  font-size     : 114%;
+  font-family   : monospace;
+}
+
+
+/* C++ code snippet */
+pre.cxx {
+
+  margin-top       : 0em;
+  margin-bottom    : 2em;
+
+  margin-left      : 1em;
+}
+
+
+
+/* make code snippet */
+pre.make {
+
+  margin-top       : 0em;
+  margin-bottom    : 2em;
+
+  margin-left      : 1em;
+}
+
+
+
+/* terminal output */
+pre.term {
+
+  margin-top       : 0em;
+  margin-bottom    : 2em;
+
+  margin-left      : 1em;
+}
+
+
+/* Images */
+div.center {
+  text-align: center;
+}
+
+/* Navigation. */
+#navigation {
+  margin-top: 1em;
+  border-bottom: 1px dashed #000000;
+}
+
+#content {
+  margin-top: 2.5em;
+}
+
+
+/* Document info. */
+#docinfo {
+  margin-top: 4em;
+  border-top: 1px dashed #000000;
+  font-size: 70%;
+}
+
+/* distribution terms */
+div.terms {
+  font-size     : 114%;
+  font-family      : monospace;
+}
+
+
+
+/* Footnote */
+
+#footnote {
+  margin-top: 2em;
+}
+
+#footnote hr {
+  margin-left: 0;
+  margin-bottom: 1.5em;
+  width: 8em;
+  border-top: 1px solid #000000;
+  border-right: none;
+  border-bottom: none;
+  border-left: none;
+
+}
+
+#footnote p {
+  font-size: .91em;
+  text-indent: -0.8em;
+  padding-left: 0.8em;
+}
+
diff --git a/libbackend-elements/documentation/index.xhtml b/libbackend-elements/documentation/index.xhtml
new file mode 100644
index 0000000..028cc40
--- /dev/null
+++ b/libbackend-elements/documentation/index.xhtml
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+
+<!--
+
+file      : documentation/index.xhtml
+author    : Boris Kolpackov <boris@kolpackov.net>
+copyright : Copyright (c) 2005-2010 Boris Kolpackov
+license   : GNU FDL v1.2; http://kolpackov.net/licenses/fdl-1.2.txt
+
+-->
+
+<head>
+
+  <title>libbackend-elements/documentation</title>
+
+  <meta name="author" content="Boris Kolpackov"/>
+  <meta name="copyright" content="&copy; 2005-2010 Boris Kolpackov"/>
+  <meta name="keywords" content="c++,library,compiler,backend"/>
+  <meta name="description" content="libbackend-elements/documentation"/>
+
+  <link rel="stylesheet" type="text/css" href="default.css"/>
+
+</head>
+
+<body>
+
+<div id="navigation">
+<p>
+<a href=".."><code>libbackend-elements</code></a> <code>/</code>
+<code>documentation</code>
+</p>
+</div>
+
+<div id="content">
+<p><i>libbackend-elements</i> contains a collection of
+indentation buffers for automatic source code indentation. Indentation
+buffers can be attached to any <code>std::ostream</code> instance. C++
+and OMG IDL are supported in this version.</p>
+</div>
+
+<div id="docinfo">
+<p>Copyright &copy; 2005-2010 <a title="Boris Kolpackov"
+href="http://kolpackov.net">Boris Kolpackov</a>.</p>
+
+<div class="terms">
+Permission is granted to copy, distribute and/or modify this document under
+the terms of the <a href="http://kolpackov.net/licenses/fdl-1.2.txt">GNU Free
+Documentation License, version 1.2</a>; with no Invariant Sections, no
+Front-Cover Texts and no Back-Cover Texts.
+</div>
+</div>
+
+</body>
+</html>
diff --git a/libbackend-elements/makefile b/libbackend-elements/makefile
new file mode 100644
index 0000000..3929387
--- /dev/null
+++ b/libbackend-elements/makefile
@@ -0,0 +1,17 @@
+# file      : makefile
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))build/bootstrap.make
+
+default := $(out_base)/
+test    := $(out_base)/.test
+clean   := $(out_base)/.clean
+
+$(default): $(out_base)/backend-elements/ $(out_base)/tests/
+$(test): $(out_base)/tests/.test
+$(clean): $(out_base)/backend-elements/.clean $(out_base)/tests/.clean
+
+$(call import,$(src_base)/backend-elements/makefile)
+$(call import,$(src_base)/tests/makefile)
diff --git a/libbackend-elements/tests/indentation/cxx/driver.cxx b/libbackend-elements/tests/indentation/cxx/driver.cxx
new file mode 100644
index 0000000..adfc2fc
--- /dev/null
+++ b/libbackend-elements/tests/indentation/cxx/driver.cxx
@@ -0,0 +1,105 @@
+// file      : tests/indentation/cxx/driver.cxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2006-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#include <iostream>
+
+#include <cult/types.hxx>
+
+#include <backend-elements/indentation/cxx.hxx>
+#include <backend-elements/indentation/clip.hxx>
+
+using namespace Cult::Types;
+using namespace BackendElements::Indentation;
+
+using std::cout;
+using std::endl;
+
+Int
+main ()
+{
+  std::ostream& os (cout);
+  Clip<CXX, Char> clip (os);
+
+  os << "if (true)"
+     << "{"
+     << "// Hello there" << endl
+     << "//" << endl
+     << "a ();"
+     << "}"
+     << "else"
+     << "{"
+     << "b ();"
+     << "}";
+
+  os << "if (false)"
+     << "{"
+     << "if (true)"
+     << "{"
+     << "// test" << endl
+     << "}"
+     << "else"
+     << "{"
+     << "// test" << endl
+     << "b ();"
+     << "}"
+     << "}";
+
+  os << "namespace a"
+     << "{"
+     << "void f ();"
+     << "}"
+     << "#if defined(__HP_aCC) && __HP_aCC <= 39999" << endl
+     << "#include <foo.h>" << endl
+     << "#endif" << endl
+     << endl
+     << "namespace b"
+     << "{"
+     << "void f ();"
+     << "}";
+
+  // Test do-while handling.
+  //
+  os << "do" << endl
+     << "f ();"
+     << "while (false);"
+     << endl;
+
+  os << "do"
+     << "{"
+     << "f ();"
+     << "}"
+     << "while (false);"
+     << endl;
+
+  os << "do"
+     << "{"
+     << "if (f ())"
+     << "{"
+     << "g ();"
+     << "}"
+     << "}"
+     << "while (false);"
+     << endl;
+
+  os << "do"
+     << "{"
+     << "do" << endl
+     << "f ();"
+     << "while (false);"
+     << "}"
+     << "while (false);"
+     << endl;
+
+  os << "do"
+     << "{"
+     << "do"
+     << "{"
+     << "f ();"
+     << "}"
+     << "while (false);"
+     << "}"
+     << "while (false);"
+     << endl;
+}
diff --git a/libbackend-elements/tests/indentation/cxx/makefile b/libbackend-elements/tests/indentation/cxx/makefile
new file mode 100644
index 0000000..ff2e15d
--- /dev/null
+++ b/libbackend-elements/tests/indentation/cxx/makefile
@@ -0,0 +1,57 @@
+# file      : tests/indentation/cxx/makefile
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2006-2010 Boris Kolpackov
+# license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../../../build/bootstrap.make
+
+cxx_tun := driver.cxx
+cxx_obj := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o))
+cxx_od  := $(cxx_obj:.o=.o.d)
+
+#be.l             := $(out_root)/backend-elements/backend-elements.l
+be.l.cpp-options := $(out_root)/backend-elements/backend-elements.l.cpp-options
+
+driver := $(out_base)/driver
+test   := $(out_base)/.test
+clean  := $(out_base)/.clean
+
+
+# Build.
+#
+$(driver): $(cxx_obj) #$(be.l)
+
+$(cxx_obj) $(cxx_od): $(be.l.cpp-options)
+
+$(call include-dep,$(cxx_od))
+
+
+# Convenience alias for default target.
+#
+$(out_base)/: $(driver)
+
+
+# Test.
+#
+$(test): driver := $(driver)
+$(test): $(driver) $(src_base)/output.cxx
+	$(driver) | diff -u $(src_base)/output.cxx -
+
+
+# Clean.
+#
+$(clean): $(driver).o.clean          \
+  $(addsuffix .cxx.clean,$(cxx_obj)) \
+  $(addsuffix .cxx.clean,$(cxx_od))
+
+
+# How to.
+#
+$(call include,$(bld_root)/cxx/o-e.make)
+$(call include,$(bld_root)/cxx/cxx-o.make)
+$(call include,$(bld_root)/cxx/cxx-d.make)
+
+
+# Dependencies.
+#
+$(call import,$(src_root)/backend-elements/makefile)
diff --git a/libbackend-elements/tests/indentation/cxx/output.cxx b/libbackend-elements/tests/indentation/cxx/output.cxx
new file mode 100644
index 0000000..1a22bc7
--- /dev/null
+++ b/libbackend-elements/tests/indentation/cxx/output.cxx
@@ -0,0 +1,75 @@
+if (true)
+{
+  // Hello there
+  //
+  a ();
+}
+else
+{
+  b ();
+}
+
+if (false)
+{
+  if (true)
+  {
+    // test
+  }
+  else
+  {
+    // test
+    b ();
+  }
+}
+
+namespace a
+{
+  void f ();
+}
+
+#if defined(__HP_aCC) && __HP_aCC <= 39999
+#include <foo.h>
+#endif
+
+namespace b
+{
+  void f ();
+}
+
+do
+  f ();
+while (false);
+
+do
+{
+  f ();
+}
+while (false);
+
+do
+{
+  if (f ())
+  {
+    g ();
+  }
+}
+while (false);
+
+do
+{
+  do
+    f ();
+  while (false);
+}
+while (false);
+
+do
+{
+  do
+  {
+    f ();
+  }
+  while (false);
+}
+while (false);
+
diff --git a/libbackend-elements/tests/indentation/makefile b/libbackend-elements/tests/indentation/makefile
new file mode 100644
index 0000000..debbeec
--- /dev/null
+++ b/libbackend-elements/tests/indentation/makefile
@@ -0,0 +1,18 @@
+# file      : tests/indentation/makefile
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2006-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../../build/bootstrap.make
+
+tests := cxx
+
+default   := $(out_base)/
+test      := $(out_base)/.test
+clean     := $(out_base)/.clean
+
+$(default): $(addprefix $(out_base)/,$(addsuffix /,$(tests)))
+$(test): $(addprefix $(out_base)/,$(addsuffix /.test,$(tests)))
+$(clean): $(addprefix $(out_base)/,$(addsuffix /.clean,$(tests)))
+
+$(foreach t,$(tests),$(call import,$(src_base)/$t/makefile))
diff --git a/libbackend-elements/tests/makefile b/libbackend-elements/tests/makefile
new file mode 100644
index 0000000..2e14098
--- /dev/null
+++ b/libbackend-elements/tests/makefile
@@ -0,0 +1,18 @@
+# file      : tests/makefile
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2006-2010 Boris Kolpackov
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../build/bootstrap.make
+
+tests := indentation
+
+default   := $(out_base)/
+test      := $(out_base)/.test
+clean     := $(out_base)/.clean
+
+$(default): $(addprefix $(out_base)/,$(addsuffix /,$(tests)))
+$(test): $(addprefix $(out_base)/,$(addsuffix /.test,$(tests)))
+$(clean): $(addprefix $(out_base)/,$(addsuffix /.clean,$(tests)))
+
+$(foreach t,$(tests),$(call import,$(src_base)/$t/makefile))
diff --git a/libbackend-elements/version b/libbackend-elements/version
new file mode 100644
index 0000000..f8a696c
--- /dev/null
+++ b/libbackend-elements/version
@@ -0,0 +1 @@
+1.7.2