| // Copyright (c) 2022, 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 relationalPattern ::= |
| /// ( equalityOperator | relationalOperator) bitwiseOrExpression |
| /// |
| /// A relational pattern lets you compare the matched value to a given constant |
| /// using any of the equality or relational operators: ==, !=, <, >, <=, and >=. |
| /// The pattern matches when calling the appropriate operator on the matched |
| /// value with the constant as an argument returns true. |
| /// |
| /// It is a compile-time error if bitwiseOrExpression is not a valid constant |
| /// expression. |
| /// |
| /// @description Check that it is a compile-time error if `bitwiseOrExpression` |
| /// is not a valid constant expression. Test subexpression |
| /// @author sgrekhov22@gmail.com |
| |
| String test(List<num> list) { |
| int i = 0; |
| final j = 10; |
| return switch (list) { |
| [> i && <= 2] => "case 1", |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| [== i++] => "case 2", |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| [>= j && < 20] => "case 3", |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| [!= i--] => "case 4", |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| _ => "default" |
| }; |
| } |
| |
| main() { |
| int i = 0; |
| final j = 10; |
| |
| List<num> list = []; |
| |
| switch (list) { |
| case [> i && <= 2]: |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| break; |
| case [== i++]: |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| break; |
| case [>= j && < 20]: |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| break; |
| case [!= i--]: |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| break; |
| default: |
| } |
| if (list case [> i && <= 2]) {} |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| if (list case [== i++]) {} |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| if (list case [>= j && < 20]) {} |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| if (list case [!= i--]) {} |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| test(list); |
| } |
