Converting C++ class to JSON

Question

I\'d like to create a JSON string containing the instance variables of my class.

For example,

class Example {  
    std::string string;  
    std::ma         


        

Answer 1

If the question is still actual, then look at json_dto library, a small header-only helper for converting data between JSON representation and c++ structs.

For example having the following structs:

struct message_source_t
{
  // Worker thread.
  std::int32_t m_thread_id;

  // Sender.
  std::string m_subsystem;
};

struct message_t
{
  // Who sent a message.
  message_source_t m_from;

  // When the message was sent (unixtime).
  std::tm m_when;

  // Message text.
  std::string m_text;
};

with the help of json_dto you can create the following JSON:

{
  "from" : 
    {
      "thread_id" : 4242,
      "sybsystem" : "json_dto"
    },
  "when" : "2016.09.28 19:55:00",
  "text" : "Hello world!"
}  

And given such JSON string you can convert it to structs.