Language/Expressions/Function_Expressions/static_type_dynamic_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]) {s} is
/// (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> dynamic.
/// 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]) {s} is
/// (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> dynamic and that wherever
/// an argument type of a function literal is not specified, it is considered
/// to have been specified as dynamic.
/// @author msyabro


typedef dynamic dynFunc();
typedef dynamic dynFuncBoolParam(bool p1, [bool? p2]);
typedef dynamic dynFuncIntParam(int p1, [int? p2]);
typedef dynamic dynFuncStringParam(String p1, [String? p2]);
typedef dynamic dynFuncListParam(List p1, [List? p2]);

main() {
  dynFunc df = () {};

  dynFuncBoolParam dfbp = (bool p1, [bool? p2]) { return 1; };
  dfbp = (bool p1, [bool? p2 = true]) { var x = p1; };
  dfbp = (a, [p2]) {};

  dynFuncIntParam dfip = (int p1, [int? p2]) { [1][0]; };
  dfip = (int p1, [int? p2]) { return p1 + (p2 as int); };
  dfip = (a, [p2]) {};

  dynFuncStringParam dfsp = (String s1, [String? p2]) { return ""; };
  dfsp = (String s1, [String? p2]) { 10 << 2; };
  dfsp = (a, [p2]) {};

  dynFuncListParam dflp = (List p1, [List? p2]) {};
  dflp = (List l1, [List? p2]) { return {}; };
  dflp = (a, [p2]) {};
}