ceph/src/boost/libs/foreach/include/boost/foreach_fwd.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // foreach.hpp header file
   3 //
   4 // Copyright 2010 Eric Niebler.
   5 // Distributed under the Boost Software License, Version 1.0. (See
   6 // accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8 // See http://www.boost.org/libs/foreach for documentation
   9 //
  10 // Credits:
  11 // Kazutoshi Satoda: for suggesting the need for a _fwd header for foreach's
  12 //                      customization points.
  13
  14 #ifndef BOOST_FOREACH_FWD_HPP
  15 #define BOOST_FOREACH_FWD_HPP
  16
  17 // This must be at global scope, hence the uglified name
  18 enum boost_foreach_argument_dependent_lookup_hack
  19 {
  20     boost_foreach_argument_dependent_lookup_hack_value
  21 };
  22
  23 namespace boost
  24 {
  25
  26 namespace foreach
  27 {
  28     ///////////////////////////////////////////////////////////////////////////////
  29     // boost::foreach::tag
  30     //
  31     typedef boost_foreach_argument_dependent_lookup_hack tag;
  32
  33     ///////////////////////////////////////////////////////////////////////////////
  34     // boost::foreach::is_lightweight_proxy
  35     //   Specialize this for user-defined collection types if they are inexpensive to copy.
  36     //   This tells BOOST_FOREACH it can avoid the rvalue/lvalue detection stuff.
  37     template<typename T>
  38     struct is_lightweight_proxy;
  39
  40     ///////////////////////////////////////////////////////////////////////////////
  41     // boost::foreach::is_noncopyable
  42     //   Specialize this for user-defined collection types if they cannot be copied.
  43     //   This also tells BOOST_FOREACH to avoid the rvalue/lvalue detection stuff.
  44     template<typename T>
  45     struct is_noncopyable;
  46
  47 } // namespace foreach
  48
  49 } // namespace boost
  50
  51 #endif