boost_has_sgi_type_traits.cxx

来自「boost库提供标准的C++ API 配合dev c++使用,功能更加强大」· CXX 代码 · 共 41 行

//  (C) Copyright John Maddock 2001. 
//  Use, modification and distribution are 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)

//  See http://www.boost.org/libs/config for most recent version.

//  MACRO:         BOOST_HAS_SGI_TYPE_TRAITS
//  TITLE:         SGI style <type_traits.h>
//  DESCRIPTION:   The standard library has it's own type_traits implementation.

#include <type_traits.h>


namespace boost_has_sgi_type_traits{

struct foo_type{};

int test()
{
   ::__true_type t;
   ::__false_type f;
   typedef ::__type_traits<int>::has_trivial_destructor td;
   typedef ::__type_traits<double>::has_trivial_assignment_operator ta;
   typedef ::__type_traits<float>::has_trivial_copy_constructor tc;
   typedef ::__type_traits<char>::has_trivial_default_constructor tdc;
   typedef ::__type_traits<foo_type>::is_POD_type isp;

   (void) &t;   // avoid "unused variable" warnings
   (void) &f;

   return 0;
}

}