old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/detail/typelist/typelist_transform.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file typelist_transform.hpp
  42  * Contains typelist utilities.
  43  * Typelists are an idea by Andrei Alexandrescu.
  44  */
  45
  46 #ifndef TYPELIST_TRANSFORM_HPP
  47 #define TYPELIST_TRANSFORM_HPP
  48
  49 #ifdef _MSC_VER
  50 #pragma warning(disable: 4503)
  51 #endif // #ifdef _MSC_VER
  52
  53 #include <ext/pb_assoc/detail/type_utils.hpp>
  54
  55 namespace detail
  56 {
  57
  58   template<class Typelist_Chain, template<typename T>
  59   class Transform>
  60   struct typelist_chain_transform_;
  61
  62   template<template<typename T>
  63   class Transform>
  64   struct typelist_chain_transform_<
  65     null_type,
  66     Transform>
  67   {
  68     typedef null_type type;
  69   };
  70
  71   template<class Hd, class Tl, template<typename T>
  72   class Transform>
  73   struct typelist_chain_transform_<
  74     typelist_chain<Hd, Tl>,
  75     Transform>
  76   {
  77     typedef typename typelist_chain_transform_< Tl, Transform>::type rest;
  78
  79     typedef typename Transform<Hd>::type my_type;
  80
  81     typedef typelist_chain< my_type, rest> type;
  82   };
  83
  84 } // namespace detail
  85
  86 #endif // #ifndef TYPELIST_TRANSFORM_HPP
  87