How to loop a Dictionary in Godot C++ GDExtension?

  • xyz
    I digged a bit and got to this solution:

    Dictionary noise_generators = generator->get_noise_generators();
Array keys = noise_generators.keys();

for (int i = 0; i < keys.size(); i++)
{
    Variant key = keys[i];
    Variant value = noise_generators[key];

    And from there I can work with key/value pairs.
    However, this is not ideal, since you'd expect to do a foreach entry in Dictionary, like so:

    for (Variant value : noise_generators)
{
    // ...
}

    But this is not supported, as shown here
    Thanks anyways!

    I have zero practical experience with GDExtensions so I'm just taking a guess from looking at the Dictionary interface in Godot's source.

    Get a list of keys in form of List<Variant> by calling Dictionary::get_key_list(). Now iterate this list and call Dictionary::get() or Dictionary::get_valid().

    You can also just iterate integers from 0 to Dictionary::size() and call Dictionary::get_key_at_index() and Dictionary::get_value_at_index() to get key/value pairs.

    Take a look at dictionary.h linked above. It's really self-explanatory.

      xyz
      I digged a bit and got to this solution:

      Dictionary noise_generators = generator->get_noise_generators();
Array keys = noise_generators.keys();

for (int i = 0; i < keys.size(); i++)
{
    Variant key = keys[i];
    Variant value = noise_generators[key];

      And from there I can work with key/value pairs.
      However, this is not ideal, since you'd expect to do a foreach entry in Dictionary, like so:

      for (Variant value : noise_generators)
{
    // ...
}

      But this is not supported, as shown here
      Thanks anyways!

      • xyz replied to this.

          svrcrz It's pretty much what I suggested just written with overloaded [] operators.
          Yeah, iterator member functions begin() and end() are not implemented in the class so range based loops won't work.