| // 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 sgrekhov@unipro.ru |
| |
| import "dart:ffi"; |
| import "package:ffi/ffi.dart"; |
| import "../../../Utils/expect.dart"; |
| |
| class U1 extends Union { |
| @Double() |
| external double x; |
| } |
| |
| class U2 extends Union { |
| @Float() |
| external double x; |
| } |
| |
| void main() { |
| Pointer<U1> u1 = calloc<U1>(); |
| try { |
| u1.ref.x = 3.14; |
| Pointer<U2> u2 = new Pointer.fromAddress(u1.address); |
| Expect.notEquals(3.14, u2.ref.x); |
| |
| u2.ref.x = 3.14; |
| Expect.notEquals(3.14, u1.ref.x); |
| } finally { |
| calloc.free(u1); |
| } |
| } |