Language/Generics/typedef_A01_t09.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.
 */
/**
 * @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] should be a type.
 * @author iarkh@unipro.ru
 */

my_function<T>() {}

class C1<T> {
  C1(T? i) {}
}

class C2<T> {
  C2(int, [T? j]) {}
}

class C3<T1, T2> {
  C3({T1? i, T2? j}) {}
}

typedef Alias1<T> = my_function;
// [error line 34, column 0]
// [analyzer] unspecified
// [cfe] unspecified
typedef Alias2<T> = my_function<T>;
// [error line 38, column 0]
// [analyzer] unspecified
// [cfe] unspecified
typedef Alias3<T> = my_function();
// [error line 42, column 0]
// [analyzer] unspecified
// [cfe] unspecified
typedef Alias4<T> = my_function<T>();
// [error line 46, column 0]
// [analyzer] unspecified
// [cfe] unspecified

typedef CAlias1<T> = C1<T>(T);
//                        ^
// [analyzer] SYNTACTIC_ERROR.EXPECTED_TOKEN
// [cfe] Expected 'Function' before this.
typedef CAlias2<T> = C2<T>(int, [T]);
//                        ^
// [analyzer] SYNTACTIC_ERROR.EXPECTED_TOKEN
// [cfe] Expected 'Function' before this.
typedef CAlias3<T1, T2> = C3<T>({T1, T2});
// [error line 59, column 0]
// [analyzer] unspecified
// [cfe] unspecified

typedef CAlias4<T extends int> = C1<T>(24);
// [error line 64, column 0]
// [analyzer] unspecified
// [cfe] unspecified

main() {}