CODEWITHSUNDEEP
flutterdart
Hassan M. Said
Hassan M. Said

Reputation: 307

Can I override a built-in function in dart core?

I want to change the implementation of a specific function in dart core, like print() for example and use it directly across my app, is that possible?

I know I can make another function and use it like:

myPrint(String s) => print('output: $s');

But I want to know if overriding print() is possible as a concept.

Upvotes: 0

Views: 1081

Answers (1)

Mehmet Demir
Mehmet Demir

Reputation: 283

use this instead to runApp()

void main() {
  overridePrint(MyApp());
}

void Function() overridePrint(void mainFn()) => () {
  var spec = new ZoneSpecification(
    print: (_, __, ___, String msg) {
      // Add to log instead of printing to stdout
      log.add(msg);
      print('output: $msg');

    }
  );
  return Zone.current.fork(specification: spec).runApp<void>(mainFn);
};

source code from: https://stackoverflow.com/a/38709440

Upvotes: 3

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