LanguageFeatures/Set-literals/syntax_t01.dart

// Copyright (c) 2018, 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 If s is a set literal, then it has the form
/// const? ('<' type '>')? '{' ... '}' where ... is zero or more comma-separated
/// element expressions (potentially with a trailing comma which is otherwise
/// ignored).
/// @description Checks set literal syntax
/// @author sgrekhov@unipro.ru

main() {
  var v1  = const <int> {,};  //# 01: syntax error
  var v2  = const {,};        //# 02: syntax error
  var v3  = {,};              //# 03: syntax error
  var v4  = const <int> {,,}; //# 04: syntax error
  var v5  = const {,,};       //# 05: syntax error
  var v6  = {,,};             //# 06: syntax error
}