reflection/ser_std_string

• C++

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  #include <ser_std_string.h>
  #include <iostream>
  #include <string>
   
  // This example shows how to serialize a component with an std::string
   
  struct StringComponent {
      std::string a;
      std::string b;
  };
   
  int main(int, char *[]) {
      flecs::world ecs;
   
      // Register reflection for std::string
      ecs.component<std::string>()
          .opaque(flecs::String) // Opaque type that maps to string
              .serialize([](const flecs::serializer *s, const std::string *data) {
                  const char *str = data->c_str();
                  return s->value(flecs::String, &str); // Forward to serializer
              })
              .assign_string([](std::string* data, const char *value) {
                  *data = value; // Assign new value to std::string
              });
   
      // Register component with std::string members
      ecs.component<StringComponent>()
          .member<std::string>("a")
          .member<std::string>("b");
   
      // Create value & serialize it
      StringComponent v = {"foo", "bar"};
      std::cout <<  ecs.to_json(&v) << std::endl;
   
      // Deserialize new strings into value
      ecs.from_json(&v, "{\"a\": \"hello\", \"b\": \"world\"}");
      std::cout << "{a: " << v.a << ", b: " << v.b << "}" << std::endl;
   
      // Output:
      //   {"a": "foo", "b": "bar"}
      //   {a: "hello", b: "world"}
  }