enable_if.hpp - DriveHQ Cloud IT/Storage service

Yes No

Do you want to visit DriveHQ English website?

enable_if.hpp - Hosted on DriveHQ Cloud IT Platform

返回上层目录
上传
下载
共享
发布
新建文件夹
新建文件
复制
剪切
删除
粘贴
评论
升级服务

路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\utility\enable_if.hpp

旋转

特效

属性

历史版本

// Boost enable_if library

// Copyright 2003 � The Trustees of Indiana University.

// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

//    Authors: Jaakko J�rvi (jajarvi at osl.iu.edu)
//             Jeremiah Willcock (jewillco at osl.iu.edu)
//             Andrew Lumsdaine (lums at osl.iu.edu)


#ifndef BOOST_UTILITY_ENABLE_IF_HPP
#define BOOST_UTILITY_ENABLE_IF_HPP

#include "boost/config.hpp"

// Even the definition of enable_if causes problems on some compilers,
// so it's macroed out for all compilers that do not support SFINAE

#ifndef BOOST_NO_SFINAE

namespace boost
{
 
  template <bool B, class T = void>
  struct enable_if_c {
    typedef T type;
  };

  template <class T>
  struct enable_if_c<false, T> {};

  template <class Cond, class T = void> 
  struct enable_if : public enable_if_c<Cond::value, T> {};

  template <bool B, class T>
  struct lazy_enable_if_c {
    typedef typename T::type type;
  };

  template <class T>
  struct lazy_enable_if_c<false, T> {};

  template <class Cond, class T> 
  struct lazy_enable_if : public lazy_enable_if_c<Cond::value, T> {};


  template <bool B, class T = void>
  struct disable_if_c {
    typedef T type;
  };

  template <class T>
  struct disable_if_c<true, T> {};

  template <class Cond, class T = void> 
  struct disable_if : public disable_if_c<Cond::value, T> {};

  template <bool B, class T>
  struct lazy_disable_if_c {
    typedef typename T::type type;
  };

  template <class T>
  struct lazy_disable_if_c<true, T> {};

  template <class Cond, class T> 
  struct lazy_disable_if : public lazy_disable_if_c<Cond::value, T> {};

} // namespace boost

#else

namespace boost {

  namespace detail { typedef void enable_if_default_T; }

  template <typename T>
  struct enable_if_does_not_work_on_this_compiler;

  template <bool B, class T = detail::enable_if_default_T>
  struct enable_if_c : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <bool B, class T = detail::enable_if_default_T> 
  struct disable_if_c : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <bool B, class T = detail::enable_if_default_T> 
  struct lazy_enable_if_c : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <bool B, class T = detail::enable_if_default_T> 
  struct lazy_disable_if_c : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <class Cond, class T = detail::enable_if_default_T> 
  struct enable_if : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <class Cond, class T = detail::enable_if_default_T> 
  struct disable_if : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <class Cond, class T = detail::enable_if_default_T> 
  struct lazy_enable_if : enable_if_does_not_work_on_this_compiler<T>
  { };

  template <class Cond, class T = detail::enable_if_default_T> 
  struct lazy_disable_if : enable_if_does_not_work_on_this_compiler<T>
  { };

} // namespace boost

#endif // BOOST_NO_SFINAE

#endif

enable_if.hpp

网页地址
文件地址

Would you like to comment?