| // 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 type alias declares a name for a type expression.
|
| * <typeAlias> ::=<metadata> typedef <typeIdentifier> <typeParameters>?‘=’<type>
|
| * ‘;’
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| * | <metadata> typedef <functionTypeAlias>
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| * <functionTypeAlias> ::= <functionPrefix> <formalParameterPart> ‘;’
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| * <functionPrefix> ::= <type>? <identifier>
|
| * @description Checks that type alias syntax works as expected. Test
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| * non-function type alias with type parameters
|
| * @author sgrekhov@unipro.ru
|
| */
|
| // SharedOptions=--enable-experiment=nonfunction-type-aliases
|
| import "../../../Utils/expect.dart";
|
|
|
| const int meta = 1;
|
|
|
| class C<T1 extends num, T2> {
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| T1 t1;
|
| T2 t2;
|
| C(this.t1, this.t2);
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| }
|
|
|
| @meta typedef CAlias1 = C;
|
| @meta typedef CAlias2<T extends num> = C<T, String>;
|
| typedef CAlias3 = C<int, String>;
|
|
|
| main() {
|
| CAlias1 ca1 = new CAlias1(3.14, "3.14");
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| Expect.isTrue(ca1 is C<num, dynamic>);
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| Expect.isTrue(ca1.t1 is num);
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| Expect.isTrue(ca1.t2 is dynamic);
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| ca1.t1 = 42;
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| Expect.equals(42, ca1.t1);
|
|
|
| CAlias2<int> ca2 = new CAlias2<int>(42, "");
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| Expect.isTrue(ca2 is C<int, String>);
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| Expect.isTrue(ca2.t1 is int);
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| Expect.isTrue(ca2.t2 is String);
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| ca2.t1 = -1;
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| Expect.equals(-1, ca2.t1);
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| ca2.t2 = "Lily was here";
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| Expect.equals("Lily was here", ca2.t2);
|
|
|
| CAlias3 ca3 = new CAlias3(42, "");
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| Expect.isTrue(ca3 is C<int, String>);
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| Expect.isTrue(ca3.t1 is int);
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| Expect.isTrue(ca3.t2 is String);
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| ca3.t1 = -1;
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| Expect.equals(-1, ca3.t1);
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| ca3.t2 = "Lily was here";
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| Expect.equals("Lily was here", ca3.t2);
|
| }
|