Dart how to pass generic function to isolate

user_10581770 0
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Is there a way to pass a generic Function as Parameter to an Isolate at spawn? I have attached a simplifyed version of my code (not working) but is there a way to archive this without dynamics? Or is the Type of the functionToCall decided at runtime and not at complietime and so not possible to decide for an isolate?

import 'dart:isolate';

class TestClass {
  // ...
}

void main(List<String> args) {
  ReceivePort receivePort = ReceivePort();

  Isolate.spawn(functionToCall<TestClass>, receivePort.sendPort);
}

void functionToCall<T>(SendPort sendPort) {
  // ...
}
dart-isolates dart
2 Answers

Everything about a generic type is known as part of the compilation, and "reified" for the same information to be double-checked at Runtime.

user_224830

I think the problem here maybe not so much with Isolates, but that I don't know of any way in Dart that you can have create a function reference to a generic function.

eg, you can call certainly call your generic function:

functionToCall<TestClass>(myPort);

But I dont see how you can create a reference to the function for a specific type (TestClass) and its a function reference that you need too pass into the spawn method, so I think thats the limitation in Dart that you are running into here.

user_854720
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