Language/Expressions/Function_Expressions/static_type_form_1_async_t01.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 => e is
/// (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> Future <flatten(T0)>, where T0
/// is the static type of e and flatten(T0) is defined as follows:
/// If T = Future<S> then flatten(T) = flatten(S).
/// Otherwise if T <: Future then let S be a type such that T << Future<S> and
/// for all R, if T << Future<R> then S << R.
/// In any case where Ti, 1 <= i <= n + k, is not specified, it is considered
/// to have been specified as dynamic.
/// @description Checks that the static type of function literal of the form
/// (T1 a1,...,Tn an, [Tn+1 xn+1 = d1,...,Tn+k xn+k = dk]) async => e is
/// (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> Future <flatten(T0)>.
/// @author ngl@unipro


import 'dart:async';

typedef Future<int> intFunc();
typedef Future<num> numFunc();
typedef Future<Object> objFunc();

typedef Future<int> intFuncParam(int p1, int p2);
typedef Future<num> numFuncParam(int p1, int p2);
typedef Future<Object> objFuncParam(int p1, int p2);

main() {
  intFunc intf = () async => 1;
  numFunc numf = () async => 1;
  objFunc objf = () async => 1;

  intFuncParam intfp = (int p1, int p2) async => 1;
  numFuncParam numfp = (int p1, int p2) async => 1;
  objFuncParam objfp = (int p1, int p2) async => 1;
}