JSON Classes array basic_parser block_storage key_value_pair object parser scoped_storage serializer storage storage_ptr string value Functions make_storage parse swap to_string Type Traits has_from_json has_to_json value_exchange Operators operator== operator!= operator< operator<= operator>= operator> operator<< Constants array_kind condition error kind object_kind string_kind Aliases error_category error_code error_condition generic_category string_view system_error