| // Copyright (c) 2011, 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 Postfix expressions invoke the postfix operators on objects. |
| /// postfixExpression: |
| /// assignableExpression postfixOperator | |
| /// primary (selector* | (‘#’ ( (identifier ‘=’?) | operator))) |
| /// ; |
| /// postfixOperator: |
| /// incrementOperator |
| /// ; |
| /// selector: |
| /// assignableSelector | |
| /// arguments |
| /// ; |
| /// incrementOperator: |
| /// '++' | |
| /// '--' |
| /// ; |
| /// A postfix expression is either a primary expression, a function, method or |
| /// getter invocation, or an invocation of a postfix operator on an expression e. |
| /// @description Checks that trying to use map with postfixOperator causes a |
| /// compile error. |
| /// `Operator []` of [Map] returns a nullable type, because it returns [null] |
| /// when the given argument isn't one of the keys of the map. That's why this is |
| /// a compile error here. Operator ?++ is not supported for Maps currently. |
| /// @author iarkh |
| |
| |
| main() { |
| var a = {1: 1, 2: 2, 3: 3}[1]++; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
