abi_specific_integer_mapping_unsupported

Invalid mapping to '{0}'; only mappings to 'Int8', 'Int16', 'Int32', 'Int64', 'Uint8', 'Uint16', 'UInt32', and 'Uint64' are supported.

The analyzer produces this diagnostic when a value in the map argument of an AbiSpecificIntegerMapping annotation is anything other than one of the following integer types:

• Int8
• Int16
• Int32
• Int64
• Uint8
• Uint16
• UInt32
• Uint64

The following code produces this diagnostic because the value of the map entry is Array<Uint8>, which isn't a valid integer type:

import 'dart:ffi';

@AbiSpecificIntegerMapping({Abi.macosX64 : Array<Uint8>(4)})
final class C extends AbiSpecificInteger {
  const C();
}

Use one of the valid types as a value in the map:

import 'dart:ffi';

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

Unless stated otherwise, the documentation on this site reflects Dart 3.8.0. Page last updated on 2025-05-08. View source or report an issue.