projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | //----------------------------------------------------------------------------- |
| 2 | // boost blank.hpp header file | |
| 3 | // See http://www.boost.org for updates, documentation, and revision history. | |
| 4 | //----------------------------------------------------------------------------- | |
| 5 | // | |
| 6 | // Copyright (c) 2003 | |
| 7 | // Eric Friedman | |
| 8 | // | |
| 9 | // Distributed under the Boost Software License, Version 1.0. (See | |
| 10 | // accompanying file LICENSE_1_0.txt or copy at | |
| 11 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 12 | ||
| 13 | #ifndef BOOST_BLANK_HPP | |
| 14 | #define BOOST_BLANK_HPP | |
| 15 | ||
| 16 | #include "boost/blank_fwd.hpp" | |
| 17 | ||
| 18 | #if !defined(BOOST_NO_IOSTREAM) | |
| 19 | #include <iosfwd> // for std::basic_ostream forward declare | |
| 20 | #include "boost/detail/templated_streams.hpp" | |
| 21 | #endif // BOOST_NO_IOSTREAM | |
| 22 | ||
| 92f5a8d4 | 23 | #include "boost/type_traits/integral_constant.hpp" |
| 7c673cae FG |
24 | #include "boost/type_traits/is_empty.hpp" |
| 25 | #include "boost/type_traits/is_pod.hpp" | |
| 26 | #include "boost/type_traits/is_stateless.hpp" | |
| 27 | ||
| 28 | namespace boost { | |
| 29 | ||
| 30 | struct blank | |
| 31 | { | |
| 32 | }; | |
| 33 | ||
| 34 | // type traits specializations | |
| 35 | // | |
| 36 | ||
| 37 | template <> | |
| 38 | struct is_pod< blank > | |
| 92f5a8d4 | 39 | : boost::true_type |
| 7c673cae FG |
40 | { |
| 41 | }; | |
| 42 | ||
| 43 | template <> | |
| 44 | struct is_empty< blank > | |
| 92f5a8d4 | 45 | : boost::true_type |
| 7c673cae FG |
46 | { |
| 47 | }; | |
| 48 | ||
| 49 | template <> | |
| 50 | struct is_stateless< blank > | |
| 92f5a8d4 | 51 | : boost::true_type |
| 7c673cae FG |
52 | { |
| 53 | }; | |
| 54 | ||
| 55 | // relational operators | |
| 56 | // | |
| 57 | ||
| 58 | inline bool operator==(const blank&, const blank&) | |
| 59 | { | |
| 60 | return true; | |
| 61 | } | |
| 62 | ||
| 63 | inline bool operator<=(const blank&, const blank&) | |
| 64 | { | |
| 65 | return true; | |
| 66 | } | |
| 67 | ||
| 68 | inline bool operator>=(const blank&, const blank&) | |
| 69 | { | |
| 70 | return true; | |
| 71 | } | |
| 72 | ||
| 73 | inline bool operator!=(const blank&, const blank&) | |
| 74 | { | |
| 75 | return false; | |
| 76 | } | |
| 77 | ||
| 78 | inline bool operator<(const blank&, const blank&) | |
| 79 | { | |
| 80 | return false; | |
| 81 | } | |
| 82 | ||
| 83 | inline bool operator>(const blank&, const blank&) | |
| 84 | { | |
| 85 | return false; | |
| 86 | } | |
| 87 | ||
| 88 | // streaming support | |
| 89 | // | |
| 90 | #if !defined(BOOST_NO_IOSTREAM) | |
| 91 | ||
| 92 | BOOST_TEMPLATED_STREAM_TEMPLATE(E,T) | |
| 93 | inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<( | |
| 94 | BOOST_TEMPLATED_STREAM(ostream, E,T)& out | |
| 95 | , const blank& | |
| 96 | ) | |
| 97 | { | |
| 98 | // (output nothing) | |
| 99 | return out; | |
| 100 | } | |
| 101 | ||
| 102 | #endif // BOOST_NO_IOSTREAM | |
| 103 | ||
| 104 | } // namespace boost | |
| 105 | ||
| 106 | #endif // BOOST_BLANK_HPP |