address_position

The '.address' expression can only be used as argument to a leaf native external call.

The analyzer produces this diagnostic when the .address getter is used in a context other than as an argument to a native external call that is marked as a leaf call (isLeaf: true).

The following code produces this diagnostic because .address is used incorrectly:

import 'dart:ffi';
import 'dart:typed_data';
​
@Native<Void Function(Pointer<Uint8>)>()
external void nonLeafCall(Pointer<Uint8> ptr);
​
void main() {
  final data = Uint8List(10);
​
  // Incorrect: Using '.address' as an argument to a non-leaf call.
  nonLeafCall(data.address);
}

Ensure that the .address expression is used directly as an argument to a native external call that is annotated with @Native(...) and has isLeaf: true set in its annotation.

import 'dart:ffi';
import 'dart:typed_data';
​
@Native<Void Function(Pointer<Uint8>)>(isLeaf: true)
external void leafCall(Pointer<Uint8> ptr);
​
void main() {
  final data = Uint8List(10);
​
  // Correct: Using .address directly as an argument to a leaf call.
  leafCall(data.address);
}