Language/Expressions/Function_Expressions/static_type_form_1_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]) => e is
 * (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> T0, where T0 is the static type
 * of e.
 * 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]) => e or
 * id(T1 a1,...,Tn an, [Tn+1 xn+1 = d1,...,Tn+k xn+k = dk]) => e
 * is (T1,...,Tn, [Tn+1 xn+1,...,Tn+k xn+k]) -> T0.
 * @static-clean
 * @author msyabro
 */

int libf() { return 1; }

typedef bool boolFunc();
typedef int intFunc();
typedef num numFunc();
typedef String stringFunc();
typedef List listFunc();

typedef bool boolFuncParam(bool p1, [bool p2]);
typedef int intFuncParam(int p1, int p2);
typedef String stringFuncParam(String s);
typedef List listFuncParam([Map m]);

main() {
  boolFunc bf = () => true;
  bf = () => 1 < 2;
  bf = () => true || false;

  intFunc intf = () => 1;
  intf = () => 1 + 2;
  intf = () => libf();

  numFunc numf = () => 1;
  numf = () => 1.0;
  numf = () => 0;

  stringFunc sf = () => "";
  sf = () => "a""b";

  listFunc lf = () => [];
  lf = () => const [1, 2, 3];

  boolFuncParam bfp = (bool p1, [bool? p2]) => false;
  bfp = (bool p1, [bool p2 = false]) => false && true;

  intFuncParam ifp = (int p1, int p2) => 0;
  ifp = (int i1, int i2) => 1 - 2;

  stringFuncParam sfp = (String s) => "string";
  sfp = (String p) => "";

  listFuncParam lfp = ([Map m = const {}]) => [m];
  lfp = ([Map? m]) => [[m]];
}