LanguageFeatures/Spread-collections/Syntax_A02_t02.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.

/// @assertion The grammar changes for map and set are a little more complex
/// because of the potential ambiguity of collections containing only spreads.
/// The changed and new rules are:
///
///    setOrMapLiteral:
///    mapLiteral |
///    setLiteral |
///    mapOrSetLiteral
///    ;
///
///    mapLiteral:
///    const? typeArguments? '{' mapLiteralEntryList? '}'
///    ;
///
///    mapLiteralEntryList:
///    mapLiteralEntry ( ',' mapLiteralEntry )* ','?
///    ;
///
///    mapLiteralEntry:
///    expression ':' expression |
///    spread
///    ;
///
///    setLiteral:
///    'const'? typeArguments? '{' spreadableList '}' ;
///
///    mapOrSetLiteral:
///    'const'?  '{' spread (',' spread)* '}' ;
///
/// @description Checks the very simple cases where some values are combined with
/// the existing set or list
/// @author iarkh@unipro.ru


import "../../Utils/expect.dart";

main() {
  Set set1 = {"abc", "int", "hello"};
  Set set2 = {14, 18, 99};
  List list3 = [0, 2, 4, 6, 8];

  Expect.setEquals({"abc", "int", "hello", 12}, {...set1, 12});
  Expect.setEquals({12, "abc", "int", "hello"}, {12, ...set1});

  Expect.setEquals({"abc", "int", "hello", 12, 2, 3, 10},
      {...set1, 12, 2, 3, 10});

  Expect.setEquals({"abc", "int", "hello", 14, 18, 99, 0, 2, 4, 6, 8},
      {...set1, ...set2, ...list3});
  Expect.setEquals({11, "abc", "int", "hello", 12, 16, 94, 0, 2, 4, 6, 8},
      {11, ...set1, 12, 16, 94, ...list3});
}