ceph/src/boost/boost/smart_ptr/detail/operator_bool.hpp

   1 //  This header intentionally has no include guards.
   2 //
   3 //  Copyright (c) 2001-2009, 2012 Peter Dimov
   4 //
   5 //  Distributed under the Boost Software License, Version 1.0.
   6 //  See accompanying file LICENSE_1_0.txt or copy at
   7 //  http://www.boost.org/LICENSE_1_0.txt
   8
   9 #if !defined( BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS ) && !defined( BOOST_NO_CXX11_NULLPTR )\
  10     && !(defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x5130))
  11
  12     explicit operator bool () const BOOST_SP_NOEXCEPT
  13     {
  14         return px != 0;
  15     }
  16
  17 #elif ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, < 0x570) ) || defined(__CINT__)
  18
  19     operator bool () const BOOST_SP_NOEXCEPT
  20     {
  21         return px != 0;
  22     }
  23
  24 #elif defined( _MANAGED )
  25
  26     static void unspecified_bool( this_type*** )
  27     {
  28     }
  29
  30     typedef void (*unspecified_bool_type)( this_type*** );
  31
  32     operator unspecified_bool_type() const BOOST_SP_NOEXCEPT
  33     {
  34         return px == 0? 0: unspecified_bool;
  35     }
  36
  37 #elif \
  38     ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
  39     ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) ) || \
  40     ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590) )
  41
  42     typedef element_type * (this_type::*unspecified_bool_type)() const;
  43
  44     operator unspecified_bool_type() const BOOST_SP_NOEXCEPT
  45     {
  46         return px == 0? 0: &this_type::get;
  47     }
  48
  49 #else
  50
  51     typedef element_type * this_type::*unspecified_bool_type;
  52
  53     operator unspecified_bool_type() const BOOST_SP_NOEXCEPT
  54     {
  55         return px == 0? 0: &this_type::px;
  56     }
  57
  58 #endif
  59
  60     // operator! is redundant, but some compilers need it
  61     bool operator! () const BOOST_SP_NOEXCEPT
  62     {
  63         return px == 0;
  64     }