ceph/src/boost/boost/json/impl/visit.hpp

   1 //
   2 // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // Official repository: https://github.com/boostorg/json
   8 //
   9
  10 #ifndef BOOST_JSON_IMPL_VISIT_HPP
  11 #define BOOST_JSON_IMPL_VISIT_HPP
  12
  13 BOOST_JSON_NS_BEGIN
  14
  15 template<class Visitor>
  16 auto
  17 visit(
  18     Visitor&& v,
  19     value& jv) -> decltype(
  20         std::declval<Visitor>()(nullptr))
  21 {
  22     switch(jv.kind())
  23     {
  24     default: // unreachable()?
  25     case kind::null:    return std::forward<Visitor>(v)(nullptr);
  26     case kind::bool_:   return std::forward<Visitor>(v)(jv.get_bool());
  27     case kind::int64:   return std::forward<Visitor>(v)(jv.get_int64());
  28     case kind::uint64:  return std::forward<Visitor>(v)(jv.get_uint64());
  29     case kind::double_: return std::forward<Visitor>(v)(jv.get_double());
  30     case kind::string:  return std::forward<Visitor>(v)(jv.get_string());
  31     case kind::array:   return std::forward<Visitor>(v)(jv.get_array());
  32     case kind::object:  return std::forward<Visitor>(v)(jv.get_object());
  33     }
  34 }
  35
  36 template<class Visitor>
  37 auto
  38 visit(
  39     Visitor&& v,
  40     value const& jv) -> decltype(
  41         std::declval<Visitor>()(nullptr))
  42 {
  43     switch (jv.kind())
  44     {
  45     default: // unreachable()?
  46     case kind::null:    return std::forward<Visitor>(v)(nullptr);
  47     case kind::bool_:   return std::forward<Visitor>(v)(jv.get_bool());
  48     case kind::int64:   return std::forward<Visitor>(v)(jv.get_int64());
  49     case kind::uint64:  return std::forward<Visitor>(v)(jv.get_uint64());
  50     case kind::double_: return std::forward<Visitor>(v)(jv.get_double());
  51     case kind::string:  return std::forward<Visitor>(v)(jv.get_string());
  52     case kind::array:   return std::forward<Visitor>(v)(jv.get_array());
  53     case kind::object:  return std::forward<Visitor>(v)(jv.get_object());
  54     }
  55 }
  56
  57 BOOST_JSON_NS_END
  58
  59 #endif