| // Copyright (c) 2019, 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 `x ?? y` results in type LUB(x!, y) |
| void main() { |
| f1(null, 2); |
| } |
| |
| void f1( |
| int? nullableInt, |
| int nonNullInt, |
| ) { |
| (nullableInt ?? nonNullInt) + 1; |
| (nullableInt ?? nullableInt) + 1; |
| // ^ |
| // [analyzer] COMPILE_TIME_ERROR.UNCHECKED_USE_OF_NULLABLE_VALUE |
| // [cfe] Operator '+' cannot be called on 'int?' because it is potentially null. |
| (nonNullInt ?? nullableInt) + 1; |
| // ^ |
| // [cfe] Operand of null-aware operation '??' has type 'int' which excludes null. |
| // ^^^^^^^^^^^ |
| // [analyzer] STATIC_WARNING.DEAD_NULL_AWARE_EXPRESSION |
| // ^ |
| // [analyzer] COMPILE_TIME_ERROR.UNCHECKED_USE_OF_NULLABLE_VALUE |
| // [cfe] Operator '+' cannot be called on 'int?' because it is potentially null. |
| (nonNullInt ?? nonNullInt) + 1; |
| // ^ |
| // [cfe] Operand of null-aware operation '??' has type 'int' which excludes null. |
| // ^^^^^^^^^^ |
| // [analyzer] STATIC_WARNING.DEAD_NULL_AWARE_EXPRESSION |
| } |
| |
| // TODO(mfairhurst) add cases with type parameter types |
