extra_ size_ annotation_ carray
'Array's must have exactly one 'Array' annotation.
Description
#
The analyzer produces this diagnostic when a field in a subclass of
Struct
has more than one annotation describing the size of the native
array.
For more information about FFI, see C interop using dart:ffi.
Example
#
The following code produces this diagnostic because the field
a0
has two
annotations that specify the size of the native array:
import 'dart:ffi';
final class C extends Struct {
@Array(4)
@Array(8)
external Array<Uint8> a0;
}
Common fixes
#Remove all but one of the annotations:
import 'dart:ffi';
final class C extends Struct {
@Array(8)
external Array<Uint8> a0;
}
Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Page last updated on 2025-9-1. View source or report an issue.