Chloe Stefantsova
40d99bc981
Additionally, report the error on the 'await' keyword instead of 'in' Change-Id: I0ccd156f19997eb18b5df004a75f86e616b23864 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/301021 Commit-Queue: Chloe Stefantsova <cstefantsova@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
98 lines
3.0 KiB
Dart
98 lines
3.0 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// The identifiers listed below are mentioned in the grammar, but none of
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// them is a reserved word or a built-in identifier. Such an identifier can
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// be used just like all other identifiers, with the exceptions mentioned
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// below. Here are said 'known' identifiers:
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//
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// `async`, `await`, `hide`, `of`, `on`, `show`, `sync`, `yield`
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//
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// The following exceptions apply:
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//
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// It is a compile-time error to use `await` or `yield` as an identifier in
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// the body of a function marked `async`, `async*`, or `sync*`.
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//
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// It is a compile-time error if an asynchronous for-in appears inside a
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// synchronous function.
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import 'dart:async';
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Future<void> f1() async {
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// Allowed:
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int async = 1;
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int await = 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ASYNC_KEYWORD_USED_AS_IDENTIFIER
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// [cfe] 'await' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.
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int yield = 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ASYNC_KEYWORD_USED_AS_IDENTIFIER
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// [cfe] 'yield' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.
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Stream<int> s = new Stream<int>.fromFuture(new Future<int>.value(1));
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await for (int i in s) {
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return;
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}
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}
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Stream<int> f2() async* {
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int async = 1;
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int await = 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ASYNC_KEYWORD_USED_AS_IDENTIFIER
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// [cfe] 'await' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.
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int yield = 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ASYNC_KEYWORD_USED_AS_IDENTIFIER
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// [cfe] 'yield' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.
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Stream<int> s = new Stream<int>.fromFuture(new Future<int>.value(1));
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await for (var i in s) {
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yield i + 1;
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}
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}
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Iterable<int> f3() sync* {
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int async = 1;
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int await = 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ASYNC_KEYWORD_USED_AS_IDENTIFIER
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// [cfe] 'await' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.
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int yield = 1;
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// ^^^^^
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// [analyzer] SYNTACTIC_ERROR.ASYNC_KEYWORD_USED_AS_IDENTIFIER
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// [cfe] 'yield' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.
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Stream<int> s = new Stream<int>.fromFuture(new Future<int>.value(1));
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await for (int i in s) {
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//^^^^^
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// [analyzer] COMPILE_TIME_ERROR.ASYNC_FOR_IN_WRONG_CONTEXT
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// [cfe] The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
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yield i + 1;
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}
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}
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void f4() {
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int async = 1;
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int await = 1;
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int yield = 1;
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Stream s = new Stream<int>.fromFuture(new Future<int>.value(1));
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await for (int i in s) {
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//^^^^^
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// [analyzer] COMPILE_TIME_ERROR.ASYNC_FOR_IN_WRONG_CONTEXT
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// [cfe] The asynchronous for-in can only be used in functions marked with 'async' or 'async*'.
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return;
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}
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}
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main() {
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Future<void> f = f1();
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Stream s = f2();
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Iterable<int> i = f3();
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f4();
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}
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