include/boost/json /detail /literals.hpp
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1   // 1   //
2   // Copyright (c) 2024 Dmitry Arkhipov (grisumbras@yandex.ru) 2   // Copyright (c) 2024 Dmitry Arkhipov (grisumbras@yandex.ru)
3   // 3   //
4   // Distributed under the Boost Software License, Version 1.0. (See accompanying 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) 5   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6   // 6   //
7   // Official repository: https://github.com/boostorg/json 7   // Official repository: https://github.com/boostorg/json
8   // 8   //
9   9  
10   #ifndef BOOST_JSON_DETAIL_LITERALS_HPP 10   #ifndef BOOST_JSON_DETAIL_LITERALS_HPP
11   #define BOOST_JSON_DETAIL_LITERALS_HPP 11   #define BOOST_JSON_DETAIL_LITERALS_HPP
12   12  
13   #include <boost/json/detail/config.hpp> 13   #include <boost/json/detail/config.hpp>
14   #include <boost/mp11/integral.hpp> 14   #include <boost/mp11/integral.hpp>
15   15  
16   namespace boost { 16   namespace boost {
17   namespace json { 17   namespace json {
18   namespace detail { 18   namespace detail {
19   19  
20   enum class literals 20   enum class literals
21   { 21   {
22   null = 0, 22   null = 0,
23   true_, 23   true_,
24   false_, 24   false_,
25   infinity, 25   infinity,
26   neg_infinity, 26   neg_infinity,
27   nan, 27   nan,
28   resume, 28   resume,
29   }; 29   };
30   30  
31   constexpr char const* literal_strings[] = { 31   constexpr char const* literal_strings[] = {
32   "null", 32   "null",
33   "true", 33   "true",
34   "false", 34   "false",
35   "Infinity", 35   "Infinity",
36   "-Infinity", 36   "-Infinity",
37   "NaN", 37   "NaN",
38   "", 38   "",
39   }; 39   };
40   40  
41   constexpr std::size_t literal_sizes[] = { 41   constexpr std::size_t literal_sizes[] = {
42   4, 42   4,
43   4, 43   4,
44   5, 44   5,
45   8, 45   8,
46   9, 46   9,
47   3, 47   3,
48   0, 48   0,
49   }; 49   };
50   50  
51   template<literals L> 51   template<literals L>
52   using literals_c = std::integral_constant<literals, L>; 52   using literals_c = std::integral_constant<literals, L>;
53   53  
54   constexpr 54   constexpr
55   unsigned char 55   unsigned char
HITCBC 56   1007 literal_index(literals l) 56   1007 literal_index(literals l)
57   { 57   {
HITCBC 58   1007 return static_cast<unsigned char>(l); 58   1007 return static_cast<unsigned char>(l);
59   } 59   }
60   60  
61   } // namespace detail 61   } // namespace detail
62   } // namespace json 62   } // namespace json
63   } // namespace boost 63   } // namespace boost
64   64  
65   #endif // BOOST_JSON_DETAIL_LITERALS_HPP 65   #endif // BOOST_JSON_DETAIL_LITERALS_HPP