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  1. namespace JSON
  2. {
  3.     template <typename Tag> struct Literal { };
  4.  
  5.     typedef Literal<struct tag_undefined> Undefined;
  6.     typedef Literal<struct tag_false> False;
  7.     typedef Literal<struct tag_null>  Null;
  8.     typedef Literal<struct tag_true>  True;
  9.  
  10.     struct Object;
  11.     struct Array;
  12.  
  13.     struct String { 
  14.         std::wstring value; 
  15.         bool operator==(String const& s) const { return value == s.value; }
  16.     };
  17. }
  18.  
  19. namespace std
  20. {
  21.     template <> struct hash<JSON::String>
  22.     {
  23.         size_t operator()(JSON::String const& s) const {
  24.             static std::hash<std::wstring> _hash;
  25.             return _hash(s.value);
  26.         }
  27.     };
  28. }
  29.  
  30. namespace JSON
  31. {
  32.     struct Number { double value;      };
  33.  
  34.     typedef boost::variant<
  35.             Undefined, // not legal as a JSON result
  36.             False, 
  37.             Null, 
  38.             True, 
  39.             boost::recursive_wrapper<Object>, 
  40.             boost::recursive_wrapper<Array>,
  41.             String,
  42.             Number
  43.         > Value;
  44.  
  45.     struct Object
  46.     {
  47.         typedef std::unordered_map<String, Value> values_t;
  48.         values_t values;
  49.     };
  50.  
  51.     struct Array
  52.     {
  53.         typedef std::deque<Value> values_t;
  54.         values_t values;
  55.     };
  56. }
  57.  
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https://ideone.com/EgW6t5
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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