// Copyright (c) 2019-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/

#ifndef TAO_PEGTL_CONTRIB_JSON_POINTER_HPP
#define TAO_PEGTL_CONTRIB_JSON_POINTER_HPP

#include "../ascii.hpp"
#include "../config.hpp"
#include "../rules.hpp"
#include "../utf8.hpp"

namespace tao
{
   namespace TAO_PEGTL_NAMESPACE
   {
      namespace json_pointer
      {
         // JSON pointer grammar according to RFC 6901

         // clang-format off
         struct unescaped : utf8::ranges< 0x0, 0x2E, 0x30, 0x7D, 0x7F, 0x10FFFF > {};
         struct escaped : seq< one< '~' >, one< '0', '1' > > {};

         struct reference_token : star< sor< unescaped, escaped > > {};
         struct json_pointer : star< one< '/' >, reference_token > {};
         // clang-format on

         // relative JSON pointer, see ...

         // clang-format off
         struct non_negative_integer : sor< one< '0' >, plus< digit > > {};
         struct relative_json_pointer : seq< non_negative_integer, sor< one< '#' >, json_pointer > > {};
         // clang-format on

      }  // namespace json_pointer

   }  // namespace TAO_PEGTL_NAMESPACE

}  // namespace tao

#endif
