blob: f765950e78725b7756e15a0e74a1c7be16e52445 [file] [log] [blame]
* Copyright (c) 2016, 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 Execution of a statement s of the form yield* e; proceeds as
* follows:
* First, the expression e is evaluated to an object o.
* If the immediately enclosing function m is marked sync*, then:
* 1. It is a dynamic error if the class of o does not implement Iterable.
* Otherwise
* 2. The method iterator is invoked upon o returning an object i.
* 3. The moveNext method of i is invoked on it with no arguments. If moveNext
* returns false execution of s is complete. Otherwise
* 4. The getter current is invoked on i. If the invocation raises an
* exception ex, execution of s throws ex. Otherwise, the result x of the
* getter invocation is added to the iterable associated with m. Execution of
* the function m immediately enclosing s is suspended until the nullary method
* moveNext() is invoked upon the iterator used to initiate the current
* invocation of m, at which point execution of s continues at 3.
* 5. The current call to moveNext() returns true.
* @description Check that dynamic error occurs if the class of o does not
* implement Iterable.
* @author
import '../../../../Utils/dynamic_check.dart';
Iterable<int> generator() sync* {
dynamic a = 1;
yield* a;
main() {
checkDynamicError(() => generator().first);