1//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
2
3//Distributed under the Boost Software License, Version 1.0. (See accompanying
4//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6#ifndef UUID_898984B4076411DD973EDFA055D89593
7#define UUID_898984B4076411DD973EDFA055D89593
8
9#include <ostream>
10
11#if (__GNUC__*100+__GNUC_MINOR__>301) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
12#pragma GCC system_header
13#endif
14#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
15#pragma warning(push,1)
16#endif
17
18namespace
19boost
20 {
21 namespace
22 to_string_detail
23 {
24 struct
25 partial_ordering_helper1
26 {
27 template <class CharT,class Traits>
28 partial_ordering_helper1( std::basic_ostream<CharT,Traits> & );
29 };
30
31 struct
32 partial_ordering_helper2
33 {
34 template <class T>
35 partial_ordering_helper2( T const & );
36 };
37
38 char operator<<( partial_ordering_helper1, partial_ordering_helper2 );
39
40 template <class T,class CharT,class Traits>
41 struct
42 is_output_streamable_impl
43 {
44 static std::basic_ostream<CharT,Traits> & f();
45 static T const & g();
46 enum e { value=1!=(sizeof(f()<<g())) };
47 };
48 }
49
50 template <class T, class CharT=char, class Traits=std::char_traits<CharT> >
51 struct
52 is_output_streamable
53 {
54 enum e { value=to_string_detail::is_output_streamable_impl<T,CharT,Traits>::value };
55 };
56 }
57
58#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
59#pragma warning(pop)
60#endif
61#endif
62