Sacado_mpl_range_c.hpp

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00001 // $Id$ 
00002 // $Source$ 
00003 // @HEADER
00004 // ***********************************************************************
00005 // 
00006 //                           Sacado Package
00007 //                 Copyright (2006) Sandia Corporation
00008 // 
00009 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
00010 // the U.S. Government retains certain rights in this software.
00011 // 
00012 // This library is free software; you can redistribute it and/or modify
00013 // it under the terms of the GNU Lesser General Public License as
00014 // published by the Free Software Foundation; either version 2.1 of the
00015 // License, or (at your option) any later version.
00016 //  
00017 // This library is distributed in the hope that it will be useful, but
00018 // WITHOUT ANY WARRANTY; without even the implied warranty of
00019 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00020 // Lesser General Public License for more details.
00021 //  
00022 // You should have received a copy of the GNU Lesser General Public
00023 // License along with this library; if not, write to the Free Software
00024 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00025 // USA
00026 // Questions? Contact David M. Gay (dmgay@sandia.gov) or Eric T. Phipps
00027 // (etphipp@sandia.gov).
00028 // 
00029 // ***********************************************************************
00030 // @HEADER
00031 
00032 #ifndef SACADO_MPL_RANGE_C_HPP
00033 #define SACADO_MPL_RANGE_C_HPP
00034 
00035 #include "Sacado_mpl_none.hpp"
00036 #include "Sacado_mpl_size.hpp"
00037 #include "Sacado_mpl_begin.hpp"
00038 #include "Sacado_mpl_end.hpp"
00039 #include "Sacado_mpl_next.hpp"
00040 #include "Sacado_mpl_at.hpp"
00041 #include "Sacado_mpl_deref.hpp"
00042 #include "Sacado_mpl_integral_c.hpp"
00043 
00044 namespace Sacado {
00045 
00046   namespace mpl {
00047 
00048     // range_c tag for mpl operations
00049     struct range_c_tag {};
00050 
00051     // range_c
00052     template <class T, T N, T M>
00053     struct range_c {
00054       typedef range_c_tag tag;
00055       typedef range_c type;
00056       static const int sz = M-N;
00057       typedef T integral_type;
00058       static const int start_value = N;
00059       static const int end_value = M;
00060     };
00061     
00062     // iterator
00063     template <class Range, int Pos>
00064     struct range_c_iterator {
00065       static const int value = Pos;
00066     };
00067 
00068     // size
00069     template <> 
00070     struct size_impl<range_c_tag> {
00071       template <class Range>
00072       struct apply {
00073   static const int value = Range::sz;
00074       };
00075     };
00076 
00077     // begin
00078     template <> 
00079     struct begin_impl<range_c_tag> {
00080       template <class Range>
00081       struct apply {
00082   typedef range_c_iterator<Range,0> type;
00083       };
00084     };
00085 
00086     // end
00087     template <> 
00088     struct end_impl<range_c_tag> {
00089       template <class Range>
00090       struct apply {
00091   typedef range_c_iterator<Range,Range::sz> type;
00092       };
00093     };
00094 
00095     // next
00096     template <class Range, int Pos>
00097     struct next< range_c_iterator<Range,Pos> > {
00098       typedef range_c_iterator<Range,Pos+1> type;
00099     };
00100 
00101     
00102 
00103     // at
00104     template <int Pos> 
00105     struct at_impl<range_c_tag, Pos> {
00106       template <class Range>
00107       struct apply {
00108   typedef integral_c<typename Range::integral_type, Range::start_value+Pos> type;
00109       };
00110     };
00111 
00112     // deref
00113     template <class Range, int Pos>
00114     struct deref< range_c_iterator<Range,Pos> > : mpl::at<Range,Pos> {};
00115     
00116   }
00117 }
00118 
00119 #endif
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