00001 //------------------------------------------------------------------- 00004 // Copyright (c) 2004 Evan Sherbrooke and Michael Lauer 00005 // 00006 // This library is free software; you can redistribute it and/or 00007 // modify it under the terms of the GNU Lesser General Public 00008 // License as published by the Free Software Foundation; either 00009 // version 2.1 of the License, or (at your option) any later version. 00010 // 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 // Lesser General Public License for more details. 00015 // 00016 // You should have received a copy of the GNU Lesser General Public 00017 // License along with this library; if not, write to the Free Software 00018 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00019 // 00020 //------------------------------------------------------------------- 00021 00022 #pragma once 00023 #ifndef VOLUMILL_TYPESTRIPPER_H 00024 #define VOLUMILL_TYPESTRIPPER_H 00025 00026 #include <boost/ref.hpp> 00027 #include <boost/type_traits.hpp> 00028 #include <boost/shared_ptr.hpp> 00029 00030 namespace util 00031 { 00032 00033 template <class T> 00034 struct TypeStripper 00035 { 00036 typedef T type; 00037 typedef typename boost::remove_reference<type>::type base_type; 00038 typedef typename boost::add_reference<type>::type ref_type; 00039 typedef typename boost::add_reference< 00040 typename boost::add_const<type>::type >::type cref_type; 00041 typedef typename boost::add_reference<base_type>::type ref_base_type; 00042 typedef typename boost::add_reference<const base_type>::type cref_base_type; 00043 00044 static 00045 ref_base_type strip(ref_base_type t) { return t; } 00046 static 00047 cref_base_type cstrip(cref_base_type t) { return t; } 00048 00049 }; 00050 00051 template <class T> 00052 struct TypeStripper<boost::shared_ptr<T> > 00053 { 00054 typedef boost::shared_ptr<T> type; 00055 typedef T wrapped_type; 00056 typedef TypeStripper<wrapped_type> wrapped_type_utils; 00057 typedef typename wrapped_type_utils::base_type base_type; 00058 typedef type & ref_type; 00059 typedef const type & cref_type; 00060 typedef typename boost::add_reference<base_type>::type ref_base_type; 00061 typedef typename boost::add_reference<const base_type>::type cref_base_type; 00062 00063 static 00064 ref_base_type strip(cref_type t) { return wrapped_type_utils::strip(*t); } 00065 static 00066 cref_base_type cstrip(cref_type t) { return wrapped_type_utils::cstrip(*t); } 00067 }; 00068 00069 template <class T> 00070 struct TypeStripper<boost::reference_wrapper<T> > 00071 { 00072 typedef boost::reference_wrapper<T> type; 00073 typedef T wrapped_type; 00074 typedef TypeStripper<wrapped_type> wrapped_type_utils; 00075 typedef typename wrapped_type_utils::base_type base_type; 00076 typedef type & ref_type; 00077 typedef const type & cref_type; 00078 typedef typename boost::add_reference<base_type>::type ref_base_type; 00079 typedef typename boost::add_reference<const base_type>::type cref_base_type; 00080 00081 static 00082 ref_base_type strip(cref_type t) { return wrapped_type_utils::strip(t); } 00083 static 00084 cref_base_type cstrip(cref_type t) { return wrapped_type_utils::cstrip(t); } 00085 00086 }; 00087 00088 template <class T> 00089 struct TypeStripper<T *> 00090 { 00091 typedef T * type; 00092 typedef T wrapped_type; 00093 typedef TypeStripper<wrapped_type> wrapped_type_utils; 00094 typedef typename wrapped_type_utils::base_type base_type; 00095 typedef type & ref_type; 00096 typedef const type & cref_type; 00097 typedef typename boost::add_reference<base_type>::type ref_base_type; 00098 typedef typename boost::add_reference<const base_type>::type cref_base_type; 00099 00100 static 00101 ref_base_type strip(cref_type t) { return wrapped_type_utils::strip(*t); } 00102 static 00103 cref_base_type cstrip(cref_type t) { return wrapped_type_utils::cstrip(*t); } 00104 }; 00105 00106 } 00107 #endif
1.4.6