Use a `confuse` function.

Use a `confuse` function.

Committed: https://github.com/dart-lang/sdk/commit/d0dc7be4a15c2cca1c24e67c8a4cac5e1653e59e

[floitsch, 2017-02-24 12:35:03]

floitsch@google.com changed reviewers:
+ sra@google.com

[floitsch, 2017-02-24 12:35:04]

TBR.

[floitsch, 2017-02-24 12:35:26]

Description was changed from

==========
Use a `confuse` function.
==========

to

==========
Use a `confuse` function.

Committed:
https://github.com/dart-lang/sdk/commit/d0dc7be4a15c2cca1c24e67c8a4cac5e1653e59e
==========

[floitsch, 2017-02-24 12:35:27]

Committed patchset #1 (id:1) manually as
d0dc7be4a15c2cca1c24e67c8a4cac5e1653e59e (presubmit successful).

[sra1, 2017-02-24 17:30:08]

lgtm

https://codereview.chromium.org/2712603006/diff/1/tests/language/mixin_proto_...
File tests/language/mixin_proto_test.dart (right):

https://codereview.chromium.org/2712603006/diff/1/tests/language/mixin_proto_...
tests/language/mixin_proto_test.dart:35: Expect.equals(44,
confuse(all[0]).foo());
FYI

You could also write  confuse(new A())

If you want an inferred type that is not dynamic, but s specific union, you can
use something like

confuseABC(x) (
  var a = confuse(x);
  if (a is A) return a;
  if (a is B) return a;
  if (a is C) return a;
  throw 123;
}

confuseABC(new A())  - dynamic A with static type {A,B,C}.

[floitsch, 2017-02-27 14:42:24]

https://codereview.chromium.org/2712603006/diff/1/tests/language/mixin_proto_...
File tests/language/mixin_proto_test.dart (right):

https://codereview.chromium.org/2712603006/diff/1/tests/language/mixin_proto_...
tests/language/mixin_proto_test.dart:35: Expect.equals(44,
confuse(all[0]).foo());
On 2017/02/24 17:30:08, sra1 wrote:
> FYI
> 
> You could also write  confuse(new A())
> 
> If you want an inferred type that is not dynamic, but s specific union, you
can
> use something like
> 
> confuseABC(x) (
>   var a = confuse(x);
>   if (a is A) return a;
>   if (a is B) return a;
>   if (a is C) return a;
>   throw 123;
> }
> 
> confuseABC(new A())  - dynamic A with static type {A,B,C}.

Acknowledged. I don't think that's necessary here.
I guess that confusing the index would also be ok.
`all[confuse(0)]`