address_position
The '.address' expression can only be used as an argument to a leaf native external call.
Description
#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).
Example
#The following code produces this diagnostic because .address is used incorrectly:
dart
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);
}Common fixes
#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.
dart
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);
}Was this page's content helpful?
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Provide details Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-30. View source or report an issue.