| // 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 @metadata (a, b) function() {} |
| /// This could be a metadata annotation @metadata(a, b) associated with a |
| /// function declaration with no return type. Or it could be a metadata |
| /// annotation @metadata associated with a function whose return type is the |
| /// record type (a, b). |
| /// |
| /// In practice, idiomatically written code is clear thanks to whitespace: |
| /// |
| /// @metadata(a, b) function() {} |
| /// |
| /// @metadata (a, b) function() {} |
| /// |
| /// The former applies (a, b) to the metadata annotation and the latter is a |
| /// return type. We disambiguate in the same way, by making whitespace after a |
| /// metadata annotation name significant. Change the grammar to: |
| /// |
| /// metadatum ::= identifier // Existing rule. |
| /// | qualifiedName // Existing rule. |
| /// | constructorDesignation NO_SPACE arguments // Changed. |
| /// The NO_SPACE lexical rule matches when there are no whitespace characters or |
| /// comments (according to the existing WHITESPACE and COMMENT lexical rules) |
| /// between the constructorDesignation and arguments. In other words, for an |
| /// argument list to be part of the metadata annotation, the ( must occur |
| /// immediately after the last character in the constructorDesignation. The last |
| /// character in constructorDesignation may be an identifier or the > in a type |
| /// argument list. |
| /// |
| /// @description Checks that if there is a space between @metadata and (a, b) |
| /// then (a, b) denotes a record. Test variables declaration with a comment |
| /// between a metadata and a return type |
| /// @author sgrekhov22@gmail.com |
| |
| import "../../Utils/expect.dart"; |
| |
| const Meta = "meta"; |
| |
| main() { |
| @Meta/* comment */(int, String) r1 = (1, "2"); |
| |
| @Meta// comment |
| (int, String) r2 = (3, "4"); |
| |
| @Meta/* comment */ () r3 = (); |
| |
| @Meta // comment |
| () r4 = (); |
| |
| @Meta /* comment */(int, {String name}) r5 = (5, name: "name"); |
| |
| @Meta /* comment */ (int, {String name}) r6 = (6, name: "name"); |
| |
| Expect.equals(1, r1.$1); |
| Expect.equals("2", r1.$2); |
| Expect.equals(3, r2.$1); |
| Expect.equals("4", r2.$2); |
| Expect.equals((), r3); |
| Expect.equals((), r4); |
| Expect.equals(5, r5.$1); |
| Expect.equals("name", r5.name); |
| Expect.equals(6, r6.$1); |
| Expect.equals("name", r6.name); |
| } |