Language/Expressions/Function_Expressions/static_type_dynamic_asyncs_t03.dart

// Copyright (c) 2011, 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 static type of a function literal of the form
/// (T1 a1,...,Tn an, [Tn+1 xn+1 = d1,...,Tn+k xn+k = dk]) async* {s} is
/// (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> Stream.
/// In any case where Ti, 1 <= i <= n + k, is not specified, it is considered
/// to have been specified as dynamic.
/// @description Checks that it is a compile error if a function literal of
/// the form (T1 a1,...,Tn an, [Tn+1 xn+1 = d1,...,Tn+k xn+k = dk]) async* {s}
/// with two parameters is assigned to a variable of a function type with the
/// same parameters and Future return type.
/// @author ngl@unipro.ru


import 'dart:async';

typedef Future streamFuncParam(int p1, [bool? p2]);

main() {
  streamFuncParam sfp1 = (int p1, [bool? p2]) async* {};
//                       ^
// [analyzer] unspecified
// [cfe] unspecified
}