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// Copyright (c) 2020, 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.
// Test that an assignment on the left hand side of `&&` defeats promotion after
// the entire `&&` expression, even if the promotion is on the right hand side
// of `&&`.
// Note that it is not strictly necessary for soundness to defeat promotion
// under this circumstance, but it is in the spec.
class A {}
class B extends A {}
class C extends A {}
// An invocation of the form `checkNotB(x)` verifies that the static type of `x`
// is not `B`, since `B` is not assignable to `C`.
dynamic checkNotB(C c) => null;
// An invocation of the form `alwaysTrue(x)` always returns `true` regardless of
// `x`.
bool alwaysTrue(dynamic x) => true;
andChainedAndsUnparenthesizedRePromote([A a]) {
a is B && alwaysTrue(a = null) && a is B && checkNotB(a);
andChainedAndsParenLeftRePromote([A a]) {
(a is B && alwaysTrue(a = null)) && a is B && checkNotB(a);
main() {