Vanilla C++ native module kotlin code doesn't call C++ multiply() function

[kleydon]

Running npx create-react-native-library@latest <new module name> and choosing the options: Native module > C++ for Android & iOS > Vanilla results in the Android kotlin code:

  // Example method
  // See https://reactnative.dev/docs/native-modules-android
  @ReactMethod
  fun multiply(a: Double, b: Double, promise: Promise) {
    promise.resolve(a * b)
  }

As far as I understand, this is calling a * b in Kotlin, rather than the C++ function that is meant to be called (i.e. module-name::multiply(a, b), in cpp/module-name.cpp.

The swift code, in contrast, does call the C++ code.

Shouldn't the kotlin example call the C++ code, too?

[kleydon]

A recent (2023) example, illustrating how C++ functions can be called from Kotlin via the jni bridge and cpp-adapter.cpp file:

https://medium.com/@mregnauld/how-to-run-c-code-from-a-native-android-or-ios-app-265cad775ed5