#include <JAson.mqh>

int OnInit(){
    CJAVal data;

    // simple structure
    data["a"] = 12;

    // nested structure
    CJAVal nested_data;
    nested_data["k1"] = 7;
    nested_data["k2"] = "baz";
    
    data["b"] = nested_data;
    
    Print(data["b"]["k1"].ToInt());  // 0 instead of 7
    Print(data["b"]["k2"].ToStr());  // "" instead of "baz"
    Print(data.Serialize());  // {"a":12,"":{"k1":7,"k2":"baz"},"b":{}} instead of {"a":12,"b":{"k1":7,"k2":"baz"}}
}

data["b"].Set(nested_data);
Print(data["b"]["k1"].ToInt());  // 7
Print(data["b"]["k2"].ToStr());  // "baz"
Print(data.Serialize());  // {"a":12,"b":{"k1":7,"k2":"baz"}}