blob: 292d780fe87d0d570f3140d817885eafa2714c3d [file] [log] [blame]
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// @assertion All field declarations in a Union subclass declaration must
/// either have type int or float and be annotated with a NativeType
/// representing the native type, or must be of type Pointer or subtype of
/// Struct or Union.
/// @description Checks that 'Union' subtype value depends on annotation
/// @author
import "dart:ffi";
import "package:ffi/ffi.dart";
import "../../../Utils/expect.dart";
class U1 extends Union {
external int x;
class U2 extends Union {
external int x;
class U3 extends Union {
external int x;
void main() {
Pointer<U1> u1 = calloc<U1>();
try {
u1.ref.x = 0x1111111122222222;
Expect.equals(0x1111111122222222, u1.ref.x);
Pointer<U2> u2 = new Pointer.fromAddress(u1.address);
Expect.equals(0x22222222, u2.ref.x);
Expect.equals(0x11111111, u2.elementAt(1).ref.x);
Pointer<U3> u3 = new Pointer.fromAddress(u1.address);
Expect.equals(0x22222222, u3.ref.x);
Expect.equals(0x11111111, u3.elementAt(1).ref.x);
Expect.equals(-1, u2.ref.x);
Expect.equals(4294967295, u3.ref.x);
} finally {;