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epoc32/include/stdapis/boost/blank.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:27:01 +0100
branchSymbian2
changeset 3 e1b950c65cb4
permissions -rw-r--r--
Attempt to represent the S^2->S^3 header reorganisation as a series of "hg rename" operations 
     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 #include <iosfwd> // for std::basic_ostream forward declare

    19 

    20 #include "boost/detail/templated_streams.hpp"

    21 #include "boost/mpl/bool.hpp"

    22 #include "boost/type_traits/is_empty.hpp"

    23 #include "boost/type_traits/is_pod.hpp"

    24 #include "boost/type_traits/is_stateless.hpp"

    25 

    26 namespace boost {

    27 

    28 struct blank

    29 {

    30 };

    31 

    32 // type traits specializations

    33 //

    34 

    35 template <>

    36 struct is_pod< blank >

    37     : mpl::true_

    38 {

    39 };

    40 

    41 template <>

    42 struct is_empty< blank >

    43     : mpl::true_

    44 {

    45 };

    46 

    47 template <>

    48 struct is_stateless< blank >

    49     : mpl::true_

    50 {

    51 };

    52 

    53 // relational operators

    54 //

    55 

    56 inline bool operator==(const blank&, const blank&)

    57 {

    58     return true;

    59 }

    60 

    61 inline bool operator<=(const blank&, const blank&)

    62 {

    63     return true;

    64 }

    65 

    66 inline bool operator>=(const blank&, const blank&)

    67 {

    68     return true;

    69 }

    70 

    71 inline bool operator!=(const blank&, const blank&)

    72 {

    73     return false;

    74 }

    75 

    76 inline bool operator<(const blank&, const blank&)

    77 {

    78     return false;

    79 }

    80 

    81 inline bool operator>(const blank&, const blank&)

    82 {

    83     return false;

    84 }

    85 

    86 // streaming support

    87 //

    88 BOOST_TEMPLATED_STREAM_TEMPLATE(E,T)

    89 inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<(

    90       BOOST_TEMPLATED_STREAM(ostream, E,T)& out

    91     , const blank&

    92     )

    93 {

    94     // (output nothing)

    95     return out;

    96 }

    97 

    98 } // namespace boost

    99 

   100 #endif // BOOST_BLANK_HPP
test