ceph/src/boost/boost/hana/fwd/define_struct.hpp

   1 /*!
   2 @file
   3 Documents the `BOOST_HANA_DEFINE_STRUCT` macro.
   4
   5 @copyright Louis Dionne 2013-2017
   6 Distributed under the Boost Software License, Version 1.0.
   7 (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   8  */
   9
  10 #ifndef BOOST_HANA_FWD_DEFINE_STRUCT_HPP
  11 #define BOOST_HANA_FWD_DEFINE_STRUCT_HPP
  12
  13 #include <boost/hana/config.hpp>
  14
  15
  16 BOOST_HANA_NAMESPACE_BEGIN
  17     // Note:
  18     // The weird definition as a variable seems to exploit a glitch in Doxygen
  19     // which makes the macro appear in the related objects of Struct (as we
  20     // want it to).
  21
  22     //! Defines members of a structure, while at the same time
  23     //! modeling `Struct`.
  24     //! @ingroup group-Struct
  25     //!
  26     //! Using this macro in the body of a user-defined type will define the
  27     //! given members inside that type, and will also provide a model of the
  28     //! `Struct` concept for that user-defined type. This macro is often the
  29     //! easiest way to define a model of the `Struct` concept.
  30     //!
  31     //! @note
  32     //! This macro only works if the tag of the user-defined type `T` is `T`
  33     //! itself. This is the case unless you specifically asked for something
  34     //! different; see `tag_of`'s documentation.
  35     //!
  36     //!
  37     //! Example
  38     //! -------
  39     //! @include example/define_struct.cpp
  40 #ifdef BOOST_HANA_DOXYGEN_INVOKED
  41     auto BOOST_HANA_DEFINE_STRUCT(...) = ;
  42     #define BOOST_HANA_DEFINE_STRUCT(Name, ...) see documentation
  43 #else
  44     // defined in <boost/hana/define_struct.hpp>
  45 #endif
  46 BOOST_HANA_NAMESPACE_END
  47
  48 #endif // !BOOST_HANA_FWD_DEFINE_STRUCT_HPP