abi_specific_integer_mapping_extra

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

The analyzer produces this diagnostic when a class that extends AbiSpecificInteger has more than one AbiSpecificIntegerMapping annotation.

The following code produces this diagnostic because there are two AbiSpecificIntegerMapping annotations on the class C:

import 'dart:ffi';
​
@AbiSpecificIntegerMapping({Abi.macosX64 : Int8()})
@AbiSpecificIntegerMapping({Abi.linuxX64 : Uint16()})
final class C extends AbiSpecificInteger {
  const C();
}

Remove all but one of the annotations, merging the arguments as appropriate:

import 'dart:ffi';
​
@AbiSpecificIntegerMapping({Abi.macosX64 : Int8(), Abi.linuxX64 : Uint16()})
final class C extends AbiSpecificInteger {
  const C();
}