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abi_specific_integer_mapping_missing

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Classes extending 'AbiSpecificInteger' must have exactly one 'AbiSpecificIntegerMapping' annotation specifying the mapping from ABI to a 'NativeType' integer with a fixed size.

Description

#

The analyzer produces this diagnostic when a class that extends AbiSpecificInteger doesn't have an AbiSpecificIntegerMapping annotation.

Example

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The following code produces this diagnostic because there's no AbiSpecificIntegerMapping annotation on the class C:

dart
import 'dart:ffi';

final class C extends AbiSpecificInteger {
  const C();
}

Common fixes

#

Add an AbiSpecificIntegerMapping annotation to the class:

dart
import 'dart:ffi';

@AbiSpecificIntegerMapping({Abi.macosX64 : Int8()})
final class C extends AbiSpecificInteger {
  const C();
}

Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-08. View source or report an issue.