reflection/auto_define_enum

• C

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  #include <auto_define_enum.h>
  #include <stdio.h>
   
  // Color is used by Car, so it must also be captured
  ECS_ENUM(Color, {
      Red, Black, White, StainlessSteel
  });
   
  ECS_STRUCT(Car, {
      const char *brand;
      Color color;
      float speed;
  });
   
  int main(int argc, char *argv[]) {
      ecs_world_t *ecs = ecs_init_w_args(argc, argv);
   
      // Register both components. Note that Color is registered first, so that
      // when Car is registered, the type information of Color can be looked up
      ECS_META_COMPONENT(ecs, Color);
      ECS_META_COMPONENT(ecs, Car);
   
      // Serialize as usual
      Car value = {"Delorean", StainlessSteel, 1.21f};
      char *json = ecs_ptr_to_json(ecs, ecs_id(Car), &value);
      printf("%s\n", json); // {"brand": "Delorean", "color": "StainlessSteel", "speed": 1.21}
      ecs_os_free(json);
   
      return ecs_fini(ecs);
  }

• C++

  View on GitHub

  #include <auto_define_enum.h>
  #include <iostream>
   
  // Capture reflection data for Color and Car
  ECS_ENUM(Color, {
      Red, Black, White, StainlessSteel
  });
   
  ECS_STRUCT(Car, {
      const char *brand;
      Color color;
      float speed;
  });
   
  int main(int, char *[]) {
      flecs::world ecs;
   
      // Color won't be detected by automatic component registration, so register
      // it explicitly.
      ecs.component<Color>();
   
      // Serialize as usual. Component registration automatically detects the
      // reflection data for Car.
      Car value = {"Delorean", StainlessSteel, 1.21f};
      std::cout << ecs.to_json(&value) << "\n"; // {"brand":"Delorean", "color":"StainlessSteel", "speed":1.2100000381}
  }