LanguageFeatures/Control-flow-collections/const_collections_A05_t01.dart

// 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 An if element:
/// ...
/// It is a compile-time error if the condition evaluates to true and the then
/// expression is not a constant expression.
///
/// @description Checks that it is a compile-time error if the condition
/// evaluates to true and the then expression is not a constant expression.
/// @author ngl@unipro.ru

main() {
  const t = true;
  var x = 1;
  List<int> list1 = const [if (t) x];           //# 01: compile-time error
  const List<int> list2 = [if (t) x + 1];       //# 02: compile-time error
  var list3 = const [if (t) x];                 //# 03: compile-time error
  var list4 = const <int>[if (t) x];            //# 04: compile-time error
  const list5 = [if (t) x];                     //# 05: compile-time error

  Set<int> set1 = const {if (t) x, -1};         //# 06: compile-time error
  const Set<int> set2 = {if (t) x - 1, -1};     //# 07: compile-time error
  var set3 = const {if (t) x, -1};              //# 08: compile-time error
  var set4 = const <int>{if (t) x + 1, -1};     //# 09: compile-time error
  const set5 = {if (t) x, -1};                  //# 10: compile-time error

  Map<int, String> map1 = const {if (t) x - 1: "0"};    //# 11: compile-time error
  const Map<int, String> map2 = {if (t) x: "1"};        //# 12: compile-time error
  var map3 = const {if (t) x + 1: "2"};                 //# 13: compile-time error
  var map4 = const <int, String>{if (t) x: "x"};        //# 14: compile-time error
  const map5 = {if (t) x + 2: "3"};                     //# 15: compile-time error
}