blob: 2164455e9d4db7674e696613aff0ef6f65c1d9d6 [file] [log] [blame]
// Copyright (c) 2019, 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.
// @dart = 2.9
/// @assertion We extend the list grammar to allow spread elements in addition to
/// regular elements:
/// listLiteral:
/// const? typeArguments? '[' spreadableList? ']'
/// ;
///
/// spreadableList:
/// spreadableExpression ( ',' spreadableExpression )* ','?
/// ;
///
/// spreadableExpression:
/// expression |
/// spread
/// ;
///
/// spread:
/// ( '...' | '...?' ) expression
/// ;
///
/// Instead of [expressionList], this uses a new [spreadableList] rule since
/// [expressionList] is used elsewhere in the grammar where spreads aren't
/// allowed. Each element in a list is either a normal expression or a spread
/// element. If the spread element starts with [...?], it's a null-aware spread
/// element.
/// @description Checks spread element syntax
/// @author iarkh@unipro.ru
main() {
Map m1 = {...{?m1}}; //# 01: syntax error
}