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c++java-native-interfaceconstantsdjinni

How to define const getters for djinni?

I define a C++ interface with djinni:

member = interface +c {
    get_id(): string;
    get_name(): string;
}

My inherited implementation uses const getters, i.e.

class MyMemeber: public Member {
  private:
    string id;
    string name;
  public:
    string get_id() const override { return id; }
    string get_name() const override { return name; }
}

This obviously fails to compile, because of const attribute. Can I teach djinni to generate the base interface with const getters, too?

Solution

  • It is nowhere documented though from the very beginning djinni generates const methods (line 295 of src/source/CppGenerator.scala). Just add const in front of method signature in idl file:

    member = interface +c {
    const get_id(): string;
    const get_name(): string;
}

    I think it would be good idea to pull request tests for this feature (and some docs), currently only const fields are tested.