diff --git a/Config.hs b/Config.hs
new file mode 100644
--- /dev/null
+++ b/Config.hs
@@ -0,0 +1,85 @@
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module Config where
+ 
+import Distribution.Simple
+import Distribution.Simple.Setup
+import Distribution.PackageDescription
+import Distribution.Simple.LocalBuildInfo
+
+import System.Exit
+import System.Process
+
+config :: LocalBuildInfo -> IO (Maybe HookedBuildInfo)
+config bInfo = do 
+  (excode, out, err) <- readProcessWithExitCode "root-config" ["--glibs"] ""
+  liboptset' <- case excode of 
+                  ExitSuccess -> do  
+                    return . Just .  mkLibraryOptionSet . words $ out
+                  _ -> do 
+                    putStrLn $ "root-config failure but I am installing HROOT without ROOT. It will not work. This is only for documentation." 
+                    return Nothing              
+  (excode2,out2,err2) <- readProcessWithExitCode "root-config" ["--incdir"] ""
+  incdir' <- case excode2 of 
+               ExitSuccess -> do  
+                 return . Just . head . words $ out2
+               _ -> do 
+                 putStrLn $ "root-config failure but I am installing HROOT without ROOT. It will not work. This is only for documentation." 
+                 return Nothing
+  let Just lib = library . localPkgDescr $ bInfo
+      buildinfo = libBuildInfo lib
+  let (r :: Maybe HookedBuildInfo) = case liboptset' of 
+            Nothing -> Nothing
+            Just liboptset -> 
+              case incdir' of 
+                Nothing -> Nothing 
+                Just incdir -> 
+                  let hbi = emptyBuildInfo { extraLibs = extraLibs buildinfo 
+                                                         ++ libs liboptset
+                                           , extraLibDirs = libdirs liboptset 
+                                           , includeDirs = incdir : includeDirs buildinfo
+                                           }
+                  in Just (Just hbi, []) 
+  return r 
+
+
+data LibraryOptionSet = LibraryOptionSet { 
+  libs :: [String], 
+  libdirs :: [String], 
+  libopts :: [String]
+} deriving Show
+
+data LibraryOption = Lib String 
+                   | Dir String
+                   | Opt String 
+                   deriving Show
+
+mkLibraryOptionSet :: [String] -> LibraryOptionSet
+mkLibraryOptionSet strs = let opts = libraryOptions strs
+                          in  foldr f (LibraryOptionSet [] [] []) opts 
+  where f x (LibraryOptionSet l d o) = case x of
+                                         Lib st -> LibraryOptionSet (st:l) d o 
+                                         Dir st -> LibraryOptionSet l (st:d) o 
+                                         Opt st -> LibraryOptionSet l d (st:o) 
+
+libraryOptions :: [String] -> [LibraryOption] -- LibraryOptionSet 
+libraryOptions = map f 
+  where f x = let r = parseLibraryOptionClassifier x
+              in  case r of 
+                    Left msg -> error (show msg)
+                    Right result -> result
+
+
+parseLibraryOptionClassifier :: String -> Either String LibraryOption 
+parseLibraryOptionClassifier [] = Left "empty option"
+parseLibraryOptionClassifier str@(x:xs) = 
+  case x of
+    '-' -> if null xs 
+             then Left "parse error"
+             else let (y:ys) = xs
+                  in  case y of
+                        'L' -> Right (Dir ys)
+                        'l' -> Right (Lib ys)
+                        _ -> Right (Opt str)
+    _ -> Right (Opt str) 
+
diff --git a/HROOT-tree.cabal b/HROOT-tree.cabal
new file mode 100644
--- /dev/null
+++ b/HROOT-tree.cabal
@@ -0,0 +1,70 @@
+Name:                HROOT-tree
+Version:     0.9.0.1
+Synopsis:    Haskell binding to ROOT Tree modules
+Description:         HROOT is a haskell Foreign Function Interface (FFI) binding to ROOT. ROOT(http://root.cern.ch) is an object-oriented program and library developed by CERN for physics data analysis.
+Homepage:       http://ianwookim.org/HROOT
+license: LGPL-2.1
+license-file: LICENSE
+Author:              Ian-Woo Kim
+Maintainer:  Ian-Woo Kim <ianwookim@gmail.com>
+Category:       Graphics, Statistics, Math, Numerical
+Tested-with:    GHC >= 7.6
+Build-Type:  Custom
+cabal-version:  >=1.10
+Extra-source-files:
+                       Config.hs
+                       csrc/HROOTTreeTBranch.h
+                       csrc/HROOTTreeTChain.h
+                       csrc/HROOTTreeTTree.h
+                       csrc/HROOTTreeTBranch.cpp
+                       csrc/HROOTTreeTChain.cpp
+                       csrc/HROOTTreeTTree.cpp
+
+
+
+
+Library
+  default-language: Haskell2010
+  hs-source-dirs: src
+  ghc-options:  -Wall -funbox-strict-fields -fno-warn-unused-do-bind -fno-warn-orphans -fno-warn-unused-imports
+  ghc-prof-options: -caf-all -auto-all
+  cc-options: -std=c++14
+  Build-Depends:      base>4 && < 5, fficxx >= 0.3, fficxx-runtime >= 0.3, template-haskell,HROOT-core
+  Exposed-Modules:
+                       HROOT.Tree
+                       HROOT.Tree.TBranch
+                       HROOT.Tree.TChain
+                       HROOT.Tree.TTree
+                       HROOT.Tree.TBranch.RawType
+                       HROOT.Tree.TChain.RawType
+                       HROOT.Tree.TTree.RawType
+                       HROOT.Tree.TBranch.FFI
+                       HROOT.Tree.TChain.FFI
+                       HROOT.Tree.TTree.FFI
+                       HROOT.Tree.TBranch.Interface
+                       HROOT.Tree.TChain.Interface
+                       HROOT.Tree.TTree.Interface
+                       HROOT.Tree.TBranch.Cast
+                       HROOT.Tree.TChain.Cast
+                       HROOT.Tree.TTree.Cast
+                       HROOT.Tree.TBranch.Implementation
+                       HROOT.Tree.TChain.Implementation
+                       HROOT.Tree.TTree.Implementation
+
+  Other-Modules:
+
+  extra-lib-dirs: 
+  extra-libraries:    stdc++ 
+  Include-dirs:       csrc 
+  Install-includes:
+                       HROOT-treeType.h
+                       HROOTTreeTBranch.h
+                       HROOTTreeTChain.h
+                       HROOTTreeTTree.h
+
+  C-sources:
+                       csrc/HROOTTreeTBranch.cpp
+                       csrc/HROOTTreeTChain.cpp
+                       csrc/HROOTTreeTTree.cpp
+
+
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
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+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. 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 LIBRARY 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
+LIBRARY (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 LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), 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 Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  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 library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
diff --git a/Setup.lhs b/Setup.lhs
new file mode 100644
--- /dev/null
+++ b/Setup.lhs
@@ -0,0 +1,33 @@
+#! /usr/bin/env runhaskell
+  
+> import Distribution.Simple
+> import Distribution.Simple.Setup
+> import Distribution.PackageDescription
+> import Distribution.Simple.LocalBuildInfo
+>
+> import Config
+>
+> myconfigHook = simpleUserHooks { confHook = hookfunction } 
+>
+> hookfunction x y = do 
+>   binfo <- confHook simpleUserHooks x y 
+>   r_pbi <- config binfo
+>   let pkg_descr = localPkgDescr binfo
+>   
+>   let newbinfo = case r_pbi of 
+>                    Just pbi ->  binfo { localPkgDescr = updatePackageDescription pbi pkg_descr }
+>                    Nothing -> do 
+>                      let r_lib = library pkg_descr 
+>                      case r_lib of
+>                        Just lib ->  
+>                          let binfo2 = libBuildInfo lib
+>                              newlib = lib { libBuildInfo = binfo2 { cSources = [] }}  
+>                          in  binfo { localPkgDescr = pkg_descr { library = Just newlib }}  
+>                        Nothing -> error "some library setting is wrong." 
+> --   putStrLn (show (localPkgDescr newbinfo))
+>   return newbinfo
+>  
+>
+> main = defaultMainWithHooks myconfigHook
+>
+
diff --git a/csrc/HROOT-treeType.h b/csrc/HROOT-treeType.h
new file mode 100644
--- /dev/null
+++ b/csrc/HROOT-treeType.h
@@ -0,0 +1,31 @@
+#ifdef __cplusplus
+extern "C" { 
+#endif
+
+#ifndef __HROOT_TREE__
+#define __HROOT_TREE__
+
+// Opaque type definition for TBranch 
+typedef struct TBranch_tag TBranch_t; 
+typedef TBranch_t * TBranch_p; 
+typedef TBranch_t const* const_TBranch_p; 
+
+
+// Opaque type definition for TChain 
+typedef struct TChain_tag TChain_t; 
+typedef TChain_t * TChain_p; 
+typedef TChain_t const* const_TChain_p; 
+
+
+// Opaque type definition for TTree 
+typedef struct TTree_tag TTree_t; 
+typedef TTree_t * TTree_p; 
+typedef TTree_t const* const_TTree_p; 
+
+
+#endif // __HROOT_TREE__
+
+#ifdef __cplusplus
+}
+#endif
+
diff --git a/csrc/HROOTTreeTBranch.cpp b/csrc/HROOTTreeTBranch.cpp
new file mode 100644
--- /dev/null
+++ b/csrc/HROOTTreeTBranch.cpp
@@ -0,0 +1,25 @@
+#include <MacroPatternMatch.h>
+#include "HROOTCoreTNamed.h"
+#include "HROOTCoreTAttFill.h"
+#include "TBranch.h"
+#include "HROOTTreeTBranch.h"
+
+
+
+#define CHECKPROTECT(x,y) IS_PAREN(IS_ ## x ## _ ## y ## _PROTECTED)
+
+#define TYPECASTMETHOD(cname,mname,oname) \
+  IIF( CHECKPROTECT(cname,mname) ) ( \
+  (to_nonconst<oname,cname ## _t>), \
+  (to_nonconst<cname,cname ## _t>) )
+
+
+TNAMED_DEF_VIRT(TBranch)
+TATTFILL_DEF_VIRT(TBranch)
+TOBJECT_DEF_VIRT(TBranch)
+DELETABLE_DEF_VIRT(TBranch)
+
+TBRANCH_DEF_VIRT(TBranch)
+
+TBRANCH_DEF_NONVIRT(TBranch)
+
diff --git a/csrc/HROOTTreeTBranch.h b/csrc/HROOTTreeTBranch.h
new file mode 100644
--- /dev/null
+++ b/csrc/HROOTTreeTBranch.h
@@ -0,0 +1,48 @@
+#ifdef __cplusplus
+extern "C" { 
+#endif
+
+#ifndef __HROOT_TREE__TBranch__
+#define __HROOT_TREE__TBranch__
+
+#include "HROOT-treeType.h"
+#include "HROOTCoreTNamed.h"
+#include "HROOTCoreTAttFill.h"
+#include "HROOTCoreTObject.h"
+#include "HROOTCoreDeletable.h"
+#include "HROOT-coreType.h"
+
+#undef TBRANCH_DECL_VIRT 
+#define TBRANCH_DECL_VIRT(Type) \
+
+
+#undef TBRANCH_DECL_NONVIRT 
+#define TBRANCH_DECL_NONVIRT(Type) \
+
+
+#undef TBRANCH_DEF_VIRT
+#define TBRANCH_DEF_VIRT(Type)\
+
+
+#undef TBRANCH_DEF_NONVIRT
+#define TBRANCH_DEF_NONVIRT(Type)\
+
+
+TNAMED_DECL_VIRT(TBranch);
+TATTFILL_DECL_VIRT(TBranch);
+TOBJECT_DECL_VIRT(TBranch);
+DELETABLE_DECL_VIRT(TBranch);
+
+
+TBRANCH_DECL_VIRT(TBranch);
+
+
+TBRANCH_DECL_NONVIRT(TBranch);
+
+
+#endif // __HROOT_TREE__TBranch__
+
+#ifdef __cplusplus
+}
+#endif
+
diff --git a/csrc/HROOTTreeTChain.cpp b/csrc/HROOTTreeTChain.cpp
new file mode 100644
--- /dev/null
+++ b/csrc/HROOTTreeTChain.cpp
@@ -0,0 +1,27 @@
+#include <MacroPatternMatch.h>
+#include "HROOTTreeTTree.h"
+#include "TChain.h"
+#include "HROOTTreeTChain.h"
+
+
+
+#define CHECKPROTECT(x,y) IS_PAREN(IS_ ## x ## _ ## y ## _PROTECTED)
+
+#define TYPECASTMETHOD(cname,mname,oname) \
+  IIF( CHECKPROTECT(cname,mname) ) ( \
+  (to_nonconst<oname,cname ## _t>), \
+  (to_nonconst<cname,cname ## _t>) )
+
+
+TTREE_DEF_VIRT(TChain)
+TNAMED_DEF_VIRT(TChain)
+TATTLINE_DEF_VIRT(TChain)
+TATTFILL_DEF_VIRT(TChain)
+TATTMARKER_DEF_VIRT(TChain)
+TOBJECT_DEF_VIRT(TChain)
+DELETABLE_DEF_VIRT(TChain)
+
+TCHAIN_DEF_VIRT(TChain)
+
+TCHAIN_DEF_NONVIRT(TChain)
+
diff --git a/csrc/HROOTTreeTChain.h b/csrc/HROOTTreeTChain.h
new file mode 100644
--- /dev/null
+++ b/csrc/HROOTTreeTChain.h
@@ -0,0 +1,65 @@
+#ifdef __cplusplus
+extern "C" { 
+#endif
+
+#ifndef __HROOT_TREE__TChain__
+#define __HROOT_TREE__TChain__
+
+#include "HROOT-treeType.h"
+#include "HROOTTreeTTree.h"
+#include "HROOTCoreTNamed.h"
+#include "HROOTCoreTAttLine.h"
+#include "HROOTCoreTAttFill.h"
+#include "HROOTCoreTAttMarker.h"
+#include "HROOTCoreTObject.h"
+#include "HROOTCoreDeletable.h"
+
+#undef TCHAIN_DECL_VIRT 
+#define TCHAIN_DECL_VIRT(Type) \
+int Type ## _addChain ( Type ## _p p, TChain_p chain ); \
+int Type ## _addChain1 ( Type ## _p p, const char* name, signed long nentries )
+
+#undef TCHAIN_DECL_NONVIRT 
+#define TCHAIN_DECL_NONVIRT(Type) \
+Type ## _p Type ## _newTChain ( const char* name, const char* title )
+
+#undef TCHAIN_DEF_VIRT
+#define TCHAIN_DEF_VIRT(Type)\
+int Type ## _addChain ( Type ## _p p, TChain_p chain )\
+{\
+return TYPECASTMETHOD(Type,addChain,TChain)(p)->Add(to_nonconst<TChain,TChain_t>(chain));\
+}\
+int Type ## _addChain1 ( Type ## _p p, const char* name, signed long nentries )\
+{\
+return TYPECASTMETHOD(Type,addChain1,TChain)(p)->Add(name, nentries);\
+}
+
+#undef TCHAIN_DEF_NONVIRT
+#define TCHAIN_DEF_NONVIRT(Type)\
+Type ## _p Type ## _newTChain ( const char* name, const char* title )\
+{\
+Type * newp = new Type (name, title); \
+return to_nonconst<Type ## _t, Type >(newp);\
+}
+
+TTREE_DECL_VIRT(TChain);
+TNAMED_DECL_VIRT(TChain);
+TATTLINE_DECL_VIRT(TChain);
+TATTFILL_DECL_VIRT(TChain);
+TATTMARKER_DECL_VIRT(TChain);
+TOBJECT_DECL_VIRT(TChain);
+DELETABLE_DECL_VIRT(TChain);
+
+
+TCHAIN_DECL_VIRT(TChain);
+
+
+TCHAIN_DECL_NONVIRT(TChain);
+
+
+#endif // __HROOT_TREE__TChain__
+
+#ifdef __cplusplus
+}
+#endif
+
diff --git a/csrc/HROOTTreeTTree.cpp b/csrc/HROOTTreeTTree.cpp
new file mode 100644
--- /dev/null
+++ b/csrc/HROOTTreeTTree.cpp
@@ -0,0 +1,30 @@
+#include <MacroPatternMatch.h>
+#include "HROOTTreeTBranch.h"
+#include "HROOTCoreTNamed.h"
+#include "HROOTCoreTAttLine.h"
+#include "HROOTCoreTAttFill.h"
+#include "HROOTCoreTAttMarker.h"
+#include "TTree.h"
+#include "HROOTTreeTTree.h"
+
+
+
+#define CHECKPROTECT(x,y) IS_PAREN(IS_ ## x ## _ ## y ## _PROTECTED)
+
+#define TYPECASTMETHOD(cname,mname,oname) \
+  IIF( CHECKPROTECT(cname,mname) ) ( \
+  (to_nonconst<oname,cname ## _t>), \
+  (to_nonconst<cname,cname ## _t>) )
+
+
+TNAMED_DEF_VIRT(TTree)
+TATTLINE_DEF_VIRT(TTree)
+TATTFILL_DEF_VIRT(TTree)
+TATTMARKER_DEF_VIRT(TTree)
+TOBJECT_DEF_VIRT(TTree)
+DELETABLE_DEF_VIRT(TTree)
+
+TTREE_DEF_VIRT(TTree)
+
+TTREE_DEF_NONVIRT(TTree)
+
diff --git a/csrc/HROOTTreeTTree.h b/csrc/HROOTTreeTTree.h
new file mode 100644
--- /dev/null
+++ b/csrc/HROOTTreeTTree.h
@@ -0,0 +1,69 @@
+#ifdef __cplusplus
+extern "C" { 
+#endif
+
+#ifndef __HROOT_TREE__TTree__
+#define __HROOT_TREE__TTree__
+
+#include "HROOT-treeType.h"
+#include "HROOTCoreTNamed.h"
+#include "HROOTCoreTAttLine.h"
+#include "HROOTCoreTAttFill.h"
+#include "HROOTCoreTAttMarker.h"
+#include "HROOTCoreTObject.h"
+#include "HROOTCoreDeletable.h"
+#include "HROOT-coreType.h"
+
+#undef TTREE_DECL_VIRT 
+#define TTREE_DECL_VIRT(Type) \
+int Type ## _Branch ( Type ## _p p, const char* folder, int bufsize, int splitlevel ); \
+TBranch_p Type ## _branch1 ( Type ## _p p, const char* name, void* address, const char* leaflist, int bufsize ); \
+int Type ## _fillTree ( Type ## _p p )
+
+#undef TTREE_DECL_NONVIRT 
+#define TTREE_DECL_NONVIRT(Type) \
+Type ## _p Type ## _newTTree ( const char* name, const char* title, int splitlevel )
+
+#undef TTREE_DEF_VIRT
+#define TTREE_DEF_VIRT(Type)\
+int Type ## _Branch ( Type ## _p p, const char* folder, int bufsize, int splitlevel )\
+{\
+return TYPECASTMETHOD(Type,Branch,TTree)(p)->Branch(folder, bufsize, splitlevel);\
+}\
+TBranch_p Type ## _branch1 ( Type ## _p p, const char* name, void* address, const char* leaflist, int bufsize )\
+{\
+return to_nonconst<TBranch_t,TBranch>((TBranch*)TYPECASTMETHOD(Type,branch1,TTree)(p)->Branch(name, address, leaflist, bufsize));\
+}\
+int Type ## _fillTree ( Type ## _p p )\
+{\
+return TYPECASTMETHOD(Type,fillTree,TTree)(p)->Fill();\
+}
+
+#undef TTREE_DEF_NONVIRT
+#define TTREE_DEF_NONVIRT(Type)\
+Type ## _p Type ## _newTTree ( const char* name, const char* title, int splitlevel )\
+{\
+Type * newp = new Type (name, title, splitlevel); \
+return to_nonconst<Type ## _t, Type >(newp);\
+}
+
+TNAMED_DECL_VIRT(TTree);
+TATTLINE_DECL_VIRT(TTree);
+TATTFILL_DECL_VIRT(TTree);
+TATTMARKER_DECL_VIRT(TTree);
+TOBJECT_DECL_VIRT(TTree);
+DELETABLE_DECL_VIRT(TTree);
+
+
+TTREE_DECL_VIRT(TTree);
+
+
+TTREE_DECL_NONVIRT(TTree);
+
+
+#endif // __HROOT_TREE__TTree__
+
+#ifdef __cplusplus
+}
+#endif
+
diff --git a/src/HROOT/Tree.hs b/src/HROOT/Tree.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree.hs
@@ -0,0 +1,13 @@
+module HROOT.Tree (
+  module HROOT.Tree.TBranch
+, module HROOT.Tree.TChain
+, module HROOT.Tree.TTree
+) where
+
+import HROOT.Tree.TBranch
+import HROOT.Tree.TChain
+import HROOT.Tree.TTree
+
+
+
+
diff --git a/src/HROOT/Tree/TBranch.hs b/src/HROOT/Tree/TBranch.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TBranch.hs
@@ -0,0 +1,5 @@
+module HROOT.Tree.TBranch
+       (TBranch(..), ITBranch, upcastTBranch, downcastTBranch) where
+import HROOT.Tree.TBranch.RawType
+import HROOT.Tree.TBranch.Interface
+import HROOT.Tree.TBranch.Implementation
diff --git a/src/HROOT/Tree/TBranch/Cast.hs b/src/HROOT/Tree/TBranch/Cast.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TBranch/Cast.hs
@@ -0,0 +1,17 @@
+{-# LANGUAGE FlexibleInstances, FlexibleContexts, TypeFamilies,
+  MultiParamTypeClasses, OverlappingInstances, IncoherentInstances
+  #-}
+module HROOT.Tree.TBranch.Cast where
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+import System.IO.Unsafe
+import HROOT.Tree.TBranch.RawType
+import HROOT.Tree.TBranch.Interface
+
+instance (ITBranch a, FPtr a) => Castable a (Ptr RawTBranch) where
+        cast x f = f (castPtr (get_fptr x))
+        uncast x f = f (cast_fptr_to_obj (castPtr x))
+
+instance Castable TBranch (Ptr RawTBranch) where
+        cast x f = f (castPtr (get_fptr x))
+        uncast x f = f (cast_fptr_to_obj (castPtr x))
diff --git a/src/HROOT/Tree/TBranch/FFI.hsc b/src/HROOT/Tree/TBranch/FFI.hsc
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TBranch/FFI.hsc
@@ -0,0 +1,52 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
+module HROOT.Tree.TBranch.FFI where
+import Foreign.C
+import Foreign.Ptr
+import HROOT.Tree.TBranch.RawType
+import HROOT.Core.TObject.RawType
+import HROOT.Core.TClass.RawType
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_SetName"
+               c_tbranch_setname :: Ptr RawTBranch -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_SetNameTitle"
+               c_tbranch_setnametitle ::
+               Ptr RawTBranch -> CString -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_SetTitle"
+               c_tbranch_settitle :: Ptr RawTBranch -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_SetFillColor"
+               c_tbranch_setfillcolor :: Ptr RawTBranch -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_SetFillStyle"
+               c_tbranch_setfillstyle :: Ptr RawTBranch -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_Draw"
+               c_tbranch_draw :: Ptr RawTBranch -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_FindObject"
+               c_tbranch_findobject ::
+               Ptr RawTBranch -> CString -> IO (Ptr RawTObject)
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_GetName"
+               c_tbranch_getname :: Ptr RawTBranch -> IO CString
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_IsA"
+               c_tbranch_isa :: Ptr RawTBranch -> IO (Ptr RawTClass)
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_Paint"
+               c_tbranch_paint :: Ptr RawTBranch -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_printObj"
+               c_tbranch_printobj :: Ptr RawTBranch -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_SaveAs"
+               c_tbranch_saveas :: Ptr RawTBranch -> CString -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_Write"
+               c_tbranch_write ::
+               Ptr RawTBranch -> CString -> CInt -> CInt -> IO CInt
+
+foreign import ccall safe "HROOTTreeTBranch.h TBranch_delete"
+               c_tbranch_delete :: Ptr RawTBranch -> IO ()
diff --git a/src/HROOT/Tree/TBranch/Implementation.hs b/src/HROOT/Tree/TBranch/Implementation.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TBranch/Implementation.hs
@@ -0,0 +1,53 @@
+{-# LANGUAGE EmptyDataDecls, FlexibleContexts, FlexibleInstances,
+  ForeignFunctionInterface, IncoherentInstances,
+  MultiParamTypeClasses, OverlappingInstances, TypeFamilies,
+  TypeSynonymInstances #-}
+module HROOT.Tree.TBranch.Implementation where
+import FFICXX.Runtime.Cast
+import Data.Word
+import Foreign.C
+import Foreign.Ptr
+import System.IO.Unsafe
+import HROOT.Tree.TBranch.RawType
+import HROOT.Tree.TBranch.FFI
+import HROOT.Tree.TBranch.Interface
+import HROOT.Tree.TBranch.Cast
+import HROOT.Core.TClass.RawType
+import HROOT.Core.TClass.Cast
+import HROOT.Core.TClass.Interface
+import HROOT.Core.TNamed.RawType
+import HROOT.Core.TNamed.Cast
+import HROOT.Core.TNamed.Interface
+import HROOT.Core.TAttFill.RawType
+import HROOT.Core.TAttFill.Cast
+import HROOT.Core.TAttFill.Interface
+import HROOT.Core.TObject.RawType
+import HROOT.Core.TObject.Cast
+import HROOT.Core.TObject.Interface
+import HROOT.Core.Deletable.RawType
+import HROOT.Core.Deletable.Cast
+import HROOT.Core.Deletable.Interface
+
+instance ITBranch TBranch
+
+instance ITNamed TBranch where
+        setName = xform1 c_tbranch_setname
+        setNameTitle = xform2 c_tbranch_setnametitle
+        setTitle = xform1 c_tbranch_settitle
+
+instance ITAttFill TBranch where
+        setFillColor = xform1 c_tbranch_setfillcolor
+        setFillStyle = xform1 c_tbranch_setfillstyle
+
+instance ITObject TBranch where
+        draw = xform1 c_tbranch_draw
+        findObject = xform1 c_tbranch_findobject
+        getName = xform0 c_tbranch_getname
+        isA = xform0 c_tbranch_isa
+        paint = xform1 c_tbranch_paint
+        printObj = xform1 c_tbranch_printobj
+        saveAs = xform2 c_tbranch_saveas
+        write = xform3 c_tbranch_write
+
+instance IDeletable TBranch where
+        delete = xform0 c_tbranch_delete
diff --git a/src/HROOT/Tree/TBranch/Interface.hs b/src/HROOT/Tree/TBranch/Interface.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TBranch/Interface.hs
@@ -0,0 +1,26 @@
+{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
+  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
+  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
+  TypeSynonymInstances #-}
+module HROOT.Tree.TBranch.Interface where
+import Data.Word
+import Foreign.C
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+import HROOT.Tree.TBranch.RawType
+import HROOT.Core.TNamed.Interface
+import HROOT.Core.TAttFill.Interface
+
+class (ITNamed a, ITAttFill a) => ITBranch a
+
+upcastTBranch :: forall a . (FPtr a, ITBranch a) => a -> TBranch
+upcastTBranch h
+  = let fh = get_fptr h
+        fh2 :: Ptr RawTBranch = castPtr fh
+      in cast_fptr_to_obj fh2
+
+downcastTBranch :: forall a . (FPtr a, ITBranch a) => TBranch -> a
+downcastTBranch h
+  = let fh = get_fptr h
+        fh2 = castPtr fh
+      in cast_fptr_to_obj fh2
diff --git a/src/HROOT/Tree/TBranch/RawType.hs b/src/HROOT/Tree/TBranch/RawType.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TBranch/RawType.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE ForeignFunctionInterface, TypeFamilies,
+  MultiParamTypeClasses, FlexibleInstances, TypeSynonymInstances,
+  EmptyDataDecls, ExistentialQuantification, ScopedTypeVariables #-}
+module HROOT.Tree.TBranch.RawType where
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+
+data RawTBranch
+
+newtype TBranch = TBranch (Ptr RawTBranch)
+                deriving (Eq, Ord, Show)
+
+instance FPtr TBranch where
+        type Raw TBranch = RawTBranch
+        get_fptr (TBranch ptr) = ptr
+        cast_fptr_to_obj = TBranch
diff --git a/src/HROOT/Tree/TChain.hs b/src/HROOT/Tree/TChain.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TChain.hs
@@ -0,0 +1,6 @@
+module HROOT.Tree.TChain
+       (TChain(..), ITChain(..), upcastTChain, downcastTChain, newTChain)
+       where
+import HROOT.Tree.TChain.RawType
+import HROOT.Tree.TChain.Interface
+import HROOT.Tree.TChain.Implementation
diff --git a/src/HROOT/Tree/TChain/Cast.hs b/src/HROOT/Tree/TChain/Cast.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TChain/Cast.hs
@@ -0,0 +1,17 @@
+{-# LANGUAGE FlexibleInstances, FlexibleContexts, TypeFamilies,
+  MultiParamTypeClasses, OverlappingInstances, IncoherentInstances
+  #-}
+module HROOT.Tree.TChain.Cast where
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+import System.IO.Unsafe
+import HROOT.Tree.TChain.RawType
+import HROOT.Tree.TChain.Interface
+
+instance (ITChain a, FPtr a) => Castable a (Ptr RawTChain) where
+        cast x f = f (castPtr (get_fptr x))
+        uncast x f = f (cast_fptr_to_obj (castPtr x))
+
+instance Castable TChain (Ptr RawTChain) where
+        cast x f = f (castPtr (get_fptr x))
+        uncast x f = f (cast_fptr_to_obj (castPtr x))
diff --git a/src/HROOT/Tree/TChain/FFI.hsc b/src/HROOT/Tree/TChain/FFI.hsc
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TChain/FFI.hsc
@@ -0,0 +1,124 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
+module HROOT.Tree.TChain.FFI where
+import Foreign.C
+import Foreign.Ptr
+import HROOT.Tree.TChain.RawType
+import HROOT.Tree.TBranch.RawType
+import HROOT.Core.TObject.RawType
+import HROOT.Core.TClass.RawType
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_Branch"
+               c_tchain_branch ::
+               Ptr RawTChain -> CString -> CInt -> CInt -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_branch1"
+               c_tchain_branch1 ::
+               Ptr RawTChain ->
+                 CString -> (Ptr ()) -> CString -> CInt -> IO (Ptr RawTBranch)
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_fillTree"
+               c_tchain_filltree :: Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetName"
+               c_tchain_setname :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetNameTitle"
+               c_tchain_setnametitle ::
+               Ptr RawTChain -> CString -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetTitle"
+               c_tchain_settitle :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetLineColor"
+               c_tchain_getlinecolor :: Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetLineStyle"
+               c_tchain_getlinestyle :: Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetLineWidth"
+               c_tchain_getlinewidth :: Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_ResetAttLine"
+               c_tchain_resetattline :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe
+               "HROOTTreeTChain.h TChain_SetLineAttributes"
+               c_tchain_setlineattributes :: Ptr RawTChain -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetLineColor"
+               c_tchain_setlinecolor :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetLineStyle"
+               c_tchain_setlinestyle :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetLineWidth"
+               c_tchain_setlinewidth :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetFillColor"
+               c_tchain_setfillcolor :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetFillStyle"
+               c_tchain_setfillstyle :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetMarkerColor"
+               c_tchain_getmarkercolor :: Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetMarkerStyle"
+               c_tchain_getmarkerstyle :: Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetMarkerSize"
+               c_tchain_getmarkersize :: Ptr RawTChain -> IO CDouble
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_ResetAttMarker"
+               c_tchain_resetattmarker :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe
+               "HROOTTreeTChain.h TChain_SetMarkerAttributes"
+               c_tchain_setmarkerattributes :: Ptr RawTChain -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetMarkerColor"
+               c_tchain_setmarkercolor :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetMarkerStyle"
+               c_tchain_setmarkerstyle :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SetMarkerSize"
+               c_tchain_setmarkersize :: Ptr RawTChain -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_Draw"
+               c_tchain_draw :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_FindObject"
+               c_tchain_findobject ::
+               Ptr RawTChain -> CString -> IO (Ptr RawTObject)
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_GetName"
+               c_tchain_getname :: Ptr RawTChain -> IO CString
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_IsA"
+               c_tchain_isa :: Ptr RawTChain -> IO (Ptr RawTClass)
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_Paint"
+               c_tchain_paint :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_printObj"
+               c_tchain_printobj :: Ptr RawTChain -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_SaveAs"
+               c_tchain_saveas :: Ptr RawTChain -> CString -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_Write"
+               c_tchain_write ::
+               Ptr RawTChain -> CString -> CInt -> CInt -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_delete"
+               c_tchain_delete :: Ptr RawTChain -> IO ()
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_newTChain"
+               c_tchain_newtchain :: CString -> CString -> IO (Ptr RawTChain)
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_addChain"
+               c_tchain_addchain :: Ptr RawTChain -> Ptr RawTChain -> IO CInt
+
+foreign import ccall safe "HROOTTreeTChain.h TChain_addChain1"
+               c_tchain_addchain1 :: Ptr RawTChain -> CString -> CLong -> IO CInt
diff --git a/src/HROOT/Tree/TChain/Implementation.hs b/src/HROOT/Tree/TChain/Implementation.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TChain/Implementation.hs
@@ -0,0 +1,96 @@
+{-# LANGUAGE EmptyDataDecls, FlexibleContexts, FlexibleInstances,
+  ForeignFunctionInterface, IncoherentInstances,
+  MultiParamTypeClasses, OverlappingInstances, TypeFamilies,
+  TypeSynonymInstances #-}
+module HROOT.Tree.TChain.Implementation where
+import FFICXX.Runtime.Cast
+import Data.Word
+import Foreign.C
+import Foreign.Ptr
+import System.IO.Unsafe
+import HROOT.Tree.TChain.RawType
+import HROOT.Tree.TChain.FFI
+import HROOT.Tree.TChain.Interface
+import HROOT.Tree.TChain.Cast
+import HROOT.Tree.TBranch.RawType
+import HROOT.Tree.TBranch.Cast
+import HROOT.Tree.TBranch.Interface
+import HROOT.Core.TClass.RawType
+import HROOT.Core.TClass.Cast
+import HROOT.Core.TClass.Interface
+import HROOT.Tree.TTree.RawType
+import HROOT.Tree.TTree.Cast
+import HROOT.Tree.TTree.Interface
+import HROOT.Core.TNamed.RawType
+import HROOT.Core.TNamed.Cast
+import HROOT.Core.TNamed.Interface
+import HROOT.Core.TAttLine.RawType
+import HROOT.Core.TAttLine.Cast
+import HROOT.Core.TAttLine.Interface
+import HROOT.Core.TAttFill.RawType
+import HROOT.Core.TAttFill.Cast
+import HROOT.Core.TAttFill.Interface
+import HROOT.Core.TAttMarker.RawType
+import HROOT.Core.TAttMarker.Cast
+import HROOT.Core.TAttMarker.Interface
+import HROOT.Core.TObject.RawType
+import HROOT.Core.TObject.Cast
+import HROOT.Core.TObject.Interface
+import HROOT.Core.Deletable.RawType
+import HROOT.Core.Deletable.Cast
+import HROOT.Core.Deletable.Interface
+
+instance ITChain TChain where
+        addChain = xform1 c_tchain_addchain
+        addChain1 = xform2 c_tchain_addchain1
+
+instance ITTree TChain where
+        branch = xform3 c_tchain_branch
+        branch1 = xform4 c_tchain_branch1
+        fillTree = xform0 c_tchain_filltree
+
+instance ITNamed TChain where
+        setName = xform1 c_tchain_setname
+        setNameTitle = xform2 c_tchain_setnametitle
+        setTitle = xform1 c_tchain_settitle
+
+instance ITAttLine TChain where
+        getLineColor = xform0 c_tchain_getlinecolor
+        getLineStyle = xform0 c_tchain_getlinestyle
+        getLineWidth = xform0 c_tchain_getlinewidth
+        resetAttLine = xform1 c_tchain_resetattline
+        setLineAttributes = xform0 c_tchain_setlineattributes
+        setLineColor = xform1 c_tchain_setlinecolor
+        setLineStyle = xform1 c_tchain_setlinestyle
+        setLineWidth = xform1 c_tchain_setlinewidth
+
+instance ITAttFill TChain where
+        setFillColor = xform1 c_tchain_setfillcolor
+        setFillStyle = xform1 c_tchain_setfillstyle
+
+instance ITAttMarker TChain where
+        getMarkerColor = xform0 c_tchain_getmarkercolor
+        getMarkerStyle = xform0 c_tchain_getmarkerstyle
+        getMarkerSize = xform0 c_tchain_getmarkersize
+        resetAttMarker = xform1 c_tchain_resetattmarker
+        setMarkerAttributes = xform0 c_tchain_setmarkerattributes
+        setMarkerColor = xform1 c_tchain_setmarkercolor
+        setMarkerStyle = xform1 c_tchain_setmarkerstyle
+        setMarkerSize = xform1 c_tchain_setmarkersize
+
+instance ITObject TChain where
+        draw = xform1 c_tchain_draw
+        findObject = xform1 c_tchain_findobject
+        getName = xform0 c_tchain_getname
+        isA = xform0 c_tchain_isa
+        paint = xform1 c_tchain_paint
+        printObj = xform1 c_tchain_printobj
+        saveAs = xform2 c_tchain_saveas
+        write = xform3 c_tchain_write
+
+instance IDeletable TChain where
+        delete = xform0 c_tchain_delete
+
+newTChain ::
+            (Castable c1 CString, Castable c0 CString) => c0 -> c1 -> IO TChain
+newTChain = xform1 c_tchain_newtchain
diff --git a/src/HROOT/Tree/TChain/Interface.hs b/src/HROOT/Tree/TChain/Interface.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TChain/Interface.hs
@@ -0,0 +1,28 @@
+{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
+  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
+  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
+  TypeSynonymInstances #-}
+module HROOT.Tree.TChain.Interface where
+import Data.Word
+import Foreign.C
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+import HROOT.Tree.TChain.RawType
+import HROOT.Tree.TTree.Interface
+
+class ITTree a => ITChain a where
+        addChain :: (ITChain c0, FPtr c0) => a -> c0 -> IO CInt
+        
+        addChain1 :: Castable c0 CString => a -> c0 -> CLong -> IO CInt
+
+upcastTChain :: forall a . (FPtr a, ITChain a) => a -> TChain
+upcastTChain h
+  = let fh = get_fptr h
+        fh2 :: Ptr RawTChain = castPtr fh
+      in cast_fptr_to_obj fh2
+
+downcastTChain :: forall a . (FPtr a, ITChain a) => TChain -> a
+downcastTChain h
+  = let fh = get_fptr h
+        fh2 = castPtr fh
+      in cast_fptr_to_obj fh2
diff --git a/src/HROOT/Tree/TChain/RawType.hs b/src/HROOT/Tree/TChain/RawType.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TChain/RawType.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE ForeignFunctionInterface, TypeFamilies,
+  MultiParamTypeClasses, FlexibleInstances, TypeSynonymInstances,
+  EmptyDataDecls, ExistentialQuantification, ScopedTypeVariables #-}
+module HROOT.Tree.TChain.RawType where
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+
+data RawTChain
+
+newtype TChain = TChain (Ptr RawTChain)
+               deriving (Eq, Ord, Show)
+
+instance FPtr TChain where
+        type Raw TChain = RawTChain
+        get_fptr (TChain ptr) = ptr
+        cast_fptr_to_obj = TChain
diff --git a/src/HROOT/Tree/TTree.hs b/src/HROOT/Tree/TTree.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TTree.hs
@@ -0,0 +1,5 @@
+module HROOT.Tree.TTree
+       (TTree(..), ITTree(..), upcastTTree, downcastTTree, newTTree) where
+import HROOT.Tree.TTree.RawType
+import HROOT.Tree.TTree.Interface
+import HROOT.Tree.TTree.Implementation
diff --git a/src/HROOT/Tree/TTree/Cast.hs b/src/HROOT/Tree/TTree/Cast.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TTree/Cast.hs
@@ -0,0 +1,17 @@
+{-# LANGUAGE FlexibleInstances, FlexibleContexts, TypeFamilies,
+  MultiParamTypeClasses, OverlappingInstances, IncoherentInstances
+  #-}
+module HROOT.Tree.TTree.Cast where
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+import System.IO.Unsafe
+import HROOT.Tree.TTree.RawType
+import HROOT.Tree.TTree.Interface
+
+instance (ITTree a, FPtr a) => Castable a (Ptr RawTTree) where
+        cast x f = f (castPtr (get_fptr x))
+        uncast x f = f (cast_fptr_to_obj (castPtr x))
+
+instance Castable TTree (Ptr RawTTree) where
+        cast x f = f (castPtr (get_fptr x))
+        uncast x f = f (cast_fptr_to_obj (castPtr x))
diff --git a/src/HROOT/Tree/TTree/FFI.hsc b/src/HROOT/Tree/TTree/FFI.hsc
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TTree/FFI.hsc
@@ -0,0 +1,116 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
+module HROOT.Tree.TTree.FFI where
+import Foreign.C
+import Foreign.Ptr
+import HROOT.Tree.TTree.RawType
+import HROOT.Core.TObject.RawType
+import HROOT.Core.TClass.RawType
+import HROOT.Tree.TBranch.RawType
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetName"
+               c_ttree_setname :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetNameTitle"
+               c_ttree_setnametitle :: Ptr RawTTree -> CString -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetTitle"
+               c_ttree_settitle :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetLineColor"
+               c_ttree_getlinecolor :: Ptr RawTTree -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetLineStyle"
+               c_ttree_getlinestyle :: Ptr RawTTree -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetLineWidth"
+               c_ttree_getlinewidth :: Ptr RawTTree -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_ResetAttLine"
+               c_ttree_resetattline :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe
+               "HROOTTreeTTree.h TTree_SetLineAttributes"
+               c_ttree_setlineattributes :: Ptr RawTTree -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetLineColor"
+               c_ttree_setlinecolor :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetLineStyle"
+               c_ttree_setlinestyle :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetLineWidth"
+               c_ttree_setlinewidth :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetFillColor"
+               c_ttree_setfillcolor :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetFillStyle"
+               c_ttree_setfillstyle :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetMarkerColor"
+               c_ttree_getmarkercolor :: Ptr RawTTree -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetMarkerStyle"
+               c_ttree_getmarkerstyle :: Ptr RawTTree -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetMarkerSize"
+               c_ttree_getmarkersize :: Ptr RawTTree -> IO CDouble
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_ResetAttMarker"
+               c_ttree_resetattmarker :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe
+               "HROOTTreeTTree.h TTree_SetMarkerAttributes"
+               c_ttree_setmarkerattributes :: Ptr RawTTree -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetMarkerColor"
+               c_ttree_setmarkercolor :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetMarkerStyle"
+               c_ttree_setmarkerstyle :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SetMarkerSize"
+               c_ttree_setmarkersize :: Ptr RawTTree -> CInt -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_Draw"
+               c_ttree_draw :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_FindObject"
+               c_ttree_findobject ::
+               Ptr RawTTree -> CString -> IO (Ptr RawTObject)
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_GetName"
+               c_ttree_getname :: Ptr RawTTree -> IO CString
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_IsA" c_ttree_isa
+               :: Ptr RawTTree -> IO (Ptr RawTClass)
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_Paint"
+               c_ttree_paint :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_printObj"
+               c_ttree_printobj :: Ptr RawTTree -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_SaveAs"
+               c_ttree_saveas :: Ptr RawTTree -> CString -> CString -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_Write"
+               c_ttree_write :: Ptr RawTTree -> CString -> CInt -> CInt -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_delete"
+               c_ttree_delete :: Ptr RawTTree -> IO ()
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_newTTree"
+               c_ttree_newttree :: CString -> CString -> CInt -> IO (Ptr RawTTree)
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_Branch"
+               c_ttree_branch ::
+               Ptr RawTTree -> CString -> CInt -> CInt -> IO CInt
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_branch1"
+               c_ttree_branch1 ::
+               Ptr RawTTree ->
+                 CString -> (Ptr ()) -> CString -> CInt -> IO (Ptr RawTBranch)
+
+foreign import ccall safe "HROOTTreeTTree.h TTree_fillTree"
+               c_ttree_filltree :: Ptr RawTTree -> IO CInt
diff --git a/src/HROOT/Tree/TTree/Implementation.hs b/src/HROOT/Tree/TTree/Implementation.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TTree/Implementation.hs
@@ -0,0 +1,90 @@
+{-# LANGUAGE EmptyDataDecls, FlexibleContexts, FlexibleInstances,
+  ForeignFunctionInterface, IncoherentInstances,
+  MultiParamTypeClasses, OverlappingInstances, TypeFamilies,
+  TypeSynonymInstances #-}
+module HROOT.Tree.TTree.Implementation where
+import FFICXX.Runtime.Cast
+import Data.Word
+import Foreign.C
+import Foreign.Ptr
+import System.IO.Unsafe
+import HROOT.Tree.TTree.RawType
+import HROOT.Tree.TTree.FFI
+import HROOT.Tree.TTree.Interface
+import HROOT.Tree.TTree.Cast
+import HROOT.Core.TClass.RawType
+import HROOT.Core.TClass.Cast
+import HROOT.Core.TClass.Interface
+import HROOT.Tree.TBranch.RawType
+import HROOT.Tree.TBranch.Cast
+import HROOT.Tree.TBranch.Interface
+import HROOT.Core.TNamed.RawType
+import HROOT.Core.TNamed.Cast
+import HROOT.Core.TNamed.Interface
+import HROOT.Core.TAttLine.RawType
+import HROOT.Core.TAttLine.Cast
+import HROOT.Core.TAttLine.Interface
+import HROOT.Core.TAttFill.RawType
+import HROOT.Core.TAttFill.Cast
+import HROOT.Core.TAttFill.Interface
+import HROOT.Core.TAttMarker.RawType
+import HROOT.Core.TAttMarker.Cast
+import HROOT.Core.TAttMarker.Interface
+import HROOT.Core.TObject.RawType
+import HROOT.Core.TObject.Cast
+import HROOT.Core.TObject.Interface
+import HROOT.Core.Deletable.RawType
+import HROOT.Core.Deletable.Cast
+import HROOT.Core.Deletable.Interface
+
+instance ITTree TTree where
+        branch = xform3 c_ttree_branch
+        branch1 = xform4 c_ttree_branch1
+        fillTree = xform0 c_ttree_filltree
+
+instance ITNamed TTree where
+        setName = xform1 c_ttree_setname
+        setNameTitle = xform2 c_ttree_setnametitle
+        setTitle = xform1 c_ttree_settitle
+
+instance ITAttLine TTree where
+        getLineColor = xform0 c_ttree_getlinecolor
+        getLineStyle = xform0 c_ttree_getlinestyle
+        getLineWidth = xform0 c_ttree_getlinewidth
+        resetAttLine = xform1 c_ttree_resetattline
+        setLineAttributes = xform0 c_ttree_setlineattributes
+        setLineColor = xform1 c_ttree_setlinecolor
+        setLineStyle = xform1 c_ttree_setlinestyle
+        setLineWidth = xform1 c_ttree_setlinewidth
+
+instance ITAttFill TTree where
+        setFillColor = xform1 c_ttree_setfillcolor
+        setFillStyle = xform1 c_ttree_setfillstyle
+
+instance ITAttMarker TTree where
+        getMarkerColor = xform0 c_ttree_getmarkercolor
+        getMarkerStyle = xform0 c_ttree_getmarkerstyle
+        getMarkerSize = xform0 c_ttree_getmarkersize
+        resetAttMarker = xform1 c_ttree_resetattmarker
+        setMarkerAttributes = xform0 c_ttree_setmarkerattributes
+        setMarkerColor = xform1 c_ttree_setmarkercolor
+        setMarkerStyle = xform1 c_ttree_setmarkerstyle
+        setMarkerSize = xform1 c_ttree_setmarkersize
+
+instance ITObject TTree where
+        draw = xform1 c_ttree_draw
+        findObject = xform1 c_ttree_findobject
+        getName = xform0 c_ttree_getname
+        isA = xform0 c_ttree_isa
+        paint = xform1 c_ttree_paint
+        printObj = xform1 c_ttree_printobj
+        saveAs = xform2 c_ttree_saveas
+        write = xform3 c_ttree_write
+
+instance IDeletable TTree where
+        delete = xform0 c_ttree_delete
+
+newTTree ::
+           (Castable c1 CString, Castable c0 CString) =>
+           c0 -> c1 -> CInt -> IO TTree
+newTTree = xform2 c_ttree_newttree
diff --git a/src/HROOT/Tree/TTree/Interface.hs b/src/HROOT/Tree/TTree/Interface.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TTree/Interface.hs
@@ -0,0 +1,37 @@
+{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
+  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
+  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
+  TypeSynonymInstances #-}
+module HROOT.Tree.TTree.Interface where
+import Data.Word
+import Foreign.C
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+import HROOT.Tree.TTree.RawType
+import HROOT.Tree.TBranch.RawType
+import HROOT.Core.TNamed.Interface
+import HROOT.Core.TAttLine.Interface
+import HROOT.Core.TAttFill.Interface
+import HROOT.Core.TAttMarker.Interface
+
+class (ITNamed a, ITAttLine a, ITAttFill a, ITAttMarker a) =>
+      ITTree a where
+        branch :: Castable c0 CString => a -> c0 -> CInt -> CInt -> IO CInt
+        
+        branch1 ::
+                  (Castable c1 CString, Castable c0 CString) =>
+                  a -> c0 -> (Ptr ()) -> c1 -> CInt -> IO TBranch
+        
+        fillTree :: a -> IO CInt
+
+upcastTTree :: forall a . (FPtr a, ITTree a) => a -> TTree
+upcastTTree h
+  = let fh = get_fptr h
+        fh2 :: Ptr RawTTree = castPtr fh
+      in cast_fptr_to_obj fh2
+
+downcastTTree :: forall a . (FPtr a, ITTree a) => TTree -> a
+downcastTTree h
+  = let fh = get_fptr h
+        fh2 = castPtr fh
+      in cast_fptr_to_obj fh2
diff --git a/src/HROOT/Tree/TTree/RawType.hs b/src/HROOT/Tree/TTree/RawType.hs
new file mode 100644
--- /dev/null
+++ b/src/HROOT/Tree/TTree/RawType.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE ForeignFunctionInterface, TypeFamilies,
+  MultiParamTypeClasses, FlexibleInstances, TypeSynonymInstances,
+  EmptyDataDecls, ExistentialQuantification, ScopedTypeVariables #-}
+module HROOT.Tree.TTree.RawType where
+import Foreign.Ptr
+import FFICXX.Runtime.Cast
+
+data RawTTree
+
+newtype TTree = TTree (Ptr RawTTree)
+              deriving (Eq, Ord, Show)
+
+instance FPtr TTree where
+        type Raw TTree = RawTTree
+        get_fptr (TTree ptr) = ptr
+        cast_fptr_to_obj = TTree
