source:
vendors/XIOS/current/extern/boost/include/boost/smart_ptr/detail/sp_convertible.hpp
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3428
Last change on this file since 3428 was 3428, checked in by rblod, 12 years ago | |
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1 | #ifndef BOOST_SMART_PTR_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED |
2 | #define BOOST_SMART_PTR_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED |
3 | |
4 | // MS compatible compilers support #pragma once |
5 | |
6 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
7 | # pragma once |
8 | #endif |
9 | |
10 | // detail/sp_convertible.hpp |
11 | // |
12 | // Copyright 2008 Peter Dimov |
13 | // |
14 | // Distributed under the Boost Software License, Version 1.0. |
15 | // See accompanying file LICENSE_1_0.txt or copy at |
16 | // http://www.boost.org/LICENSE_1_0.txt |
17 | |
18 | #include <boost/config.hpp> |
19 | |
20 | #if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( BOOST_NO_SFINAE ) |
21 | # define BOOST_SP_NO_SP_CONVERTIBLE |
22 | #endif |
23 | |
24 | #if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ < 303 ) |
25 | # define BOOST_SP_NO_SP_CONVERTIBLE |
26 | #endif |
27 | |
28 | #if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __BORLANDC__ ) && ( __BORLANDC__ < 0x630 ) |
29 | # define BOOST_SP_NO_SP_CONVERTIBLE |
30 | #endif |
31 | |
32 | #if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) |
33 | |
34 | namespace boost |
35 | { |
36 | |
37 | namespace detail |
38 | { |
39 | |
40 | template< class Y, class T > struct sp_convertible |
41 | { |
42 | typedef char (&yes) [1]; |
43 | typedef char (&no) [2]; |
44 | |
45 | static yes f( T* ); |
46 | static no f( ... ); |
47 | |
48 | enum _vt { value = sizeof( (f)( static_cast<Y*>(0) ) ) == sizeof(yes) }; |
49 | }; |
50 | |
51 | struct sp_empty |
52 | { |
53 | }; |
54 | |
55 | template< bool > struct sp_enable_if_convertible_impl; |
56 | |
57 | template<> struct sp_enable_if_convertible_impl<true> |
58 | { |
59 | typedef sp_empty type; |
60 | }; |
61 | |
62 | template<> struct sp_enable_if_convertible_impl<false> |
63 | { |
64 | }; |
65 | |
66 | template< class Y, class T > struct sp_enable_if_convertible: public sp_enable_if_convertible_impl< sp_convertible< Y, T >::value > |
67 | { |
68 | }; |
69 | |
70 | } // namespace detail |
71 | |
72 | } // namespace boost |
73 | |
74 | #endif // !defined( BOOST_SP_NO_SP_CONVERTIBLE ) |
75 | |
76 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED |
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