ceph/src/boost/boost/bind/arg.hpp

   1 #ifndef BOOST_BIND_ARG_HPP_INCLUDED
   2 #define BOOST_BIND_ARG_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 //
  11 //  bind/arg.hpp
  12 //
  13 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
  14 //
  15 // Distributed under the Boost Software License, Version 1.0. (See
  16 // accompanying file LICENSE_1_0.txt or copy at
  17 // http://www.boost.org/LICENSE_1_0.txt)
  18 //
  19 //  See http://www.boost.org/libs/bind/bind.html for documentation.
  20 //
  21
  22 #include <boost/config.hpp>
  23 #include <boost/is_placeholder.hpp>
  24
  25 namespace boost
  26 {
  27
  28 template<bool Eq> struct _arg_eq
  29 {
  30 };
  31
  32 template<> struct _arg_eq<true>
  33 {
  34     typedef void type;
  35 };
  36
  37 template< int I > struct arg
  38 {
  39     BOOST_CONSTEXPR arg()
  40     {
  41     }
  42
  43     template< class T > BOOST_CONSTEXPR arg( T const & /* t */, typename _arg_eq< I == is_placeholder<T>::value >::type * = 0 )
  44     {
  45     }
  46 };
  47
  48 template< int I > BOOST_CONSTEXPR bool operator==( arg<I> const &, arg<I> const & )
  49 {
  50     return true;
  51 }
  52
  53 #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
  54
  55 template< int I > struct is_placeholder< arg<I> >
  56 {
  57     enum _vt { value = I };
  58 };
  59
  60 template< int I > struct is_placeholder< arg<I> (*) () >
  61 {
  62     enum _vt { value = I };
  63 };
  64
  65 #endif
  66
  67 } // namespace boost
  68
  69 #endif // #ifndef BOOST_BIND_ARG_HPP_INCLUDED