// 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 that [spreadableList] can not be declared as constant if
/// spreadable element is not a constant.
/// @author iarkh@unipro.ru


main() {
  List list1 = ["abc", "int", "hello"];
  List list2;
  int i;

  List a = const [...list2];                                       //# 01: compile-time error
  a = const ["testme", ...list2];                                  //# 02: compile-time error
  a = const [...list2, "testme"];                                  //# 03: compile-time error
  a = const ["abc", ...list1, "int", "hello", 1, ...list2, 2, 12]; //# 04: compile-time error
  a = const [...list1, i];                                         //# 05: compile-time error
}