Language/Generics/typedef_A01_t11.dart

// Copyright (c) 2019, 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 A generic type alias is a declaration [D] of one of the following
/// forms:
///    m typedef id<X1extendsB1, ..., Xs extendsBs> = T;
/// ...
/// where [m] is derived from metadata, [T] is a type, and [S?] is a type or the
/// empty string. Let [S0] be [S?] if it is a type, otherwise let [S0] be
/// [dynamic]. The associated type of [D], call it [F], is, respectively:
///   T
/// ...
/// @description Checks that [T] can be a [Function] and [S] can be a type or
/// empty string.
/// @author iarkh@unipro.ru

class A {
  static int callme() {
    return 25;
  }
}

int getme() { return 0; }
int i = 5;
String str = "test";

typedef Alias1<T> = void Function(T);

typedef Alias2<T> = T Function(T);
typedef Alias3<T1, T2, T3> = T1 Function<T extends T2>(T3);
typedef Alias4<T> = Alias1 Function(T, int, [int]);
typedef Alias5<T> = void Function(T, int, {int i, T t, num n});

typedef WAlias3<T> = A.callme Function(T, int, [int]);//# 01: compile-time error
typedef WAlias4<T> = getme Function(T, int, [int]);   //# 02: compile-time error
typedef WAlias6<T> = i Function(T, int, [int]);       //# 03: compile-time error
typedef WAlias7<T> = str Function(T, int, [int]);     //# 04: compile-time error

main() {}