| // Copyright (c) 2013, 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 |
| |
| // Owner of a type variable should be the declaration of the generic class or |
| // typedef, not an instantiation. |
| |
| library test.type_variable_owner; |
| |
| import "dart:mirrors"; |
| |
| import "package:expect/expect.dart"; |
| |
| class A<T> {} |
| |
| class B<R> extends A<R> {} |
| |
| testTypeVariableOfClass() { |
| ClassMirror aDecl = reflectClass(A); |
| ClassMirror bDecl = reflectClass(B); |
| ClassMirror aOfInt = reflect(new A<int>()).type; |
| ClassMirror aOfR = bDecl.superclass; |
| ClassMirror bOfString = reflect(new B<String>()).type; |
| ClassMirror aOfString = bOfString.superclass; |
| |
| Expect.equals(aDecl, aDecl.typeVariables[0].owner); |
| Expect.equals(aDecl, aOfInt.typeVariables[0].owner); |
| Expect.equals(aDecl, aOfR.typeVariables[0].owner); |
| Expect.equals(aDecl, aOfString.typeVariables[0].owner); |
| |
| Expect.equals(bDecl, bDecl.typeVariables[0].owner); |
| Expect.equals(bDecl, bOfString.typeVariables[0].owner); |
| } |
| |
| typedef bool Predicate<T>(T t); |
| Predicate<List> somePredicateOfList; |
| |
| testTypeVariableOfTypedef() { |
| LibraryMirror thisLibrary = |
| currentMirrorSystem().findLibrary(#test.type_variable_owner); |
| |
| TypedefMirror predicateOfDynamic = reflectType(Predicate) as TypedefMirror; |
| TypedefMirror predicateOfList = |
| (thisLibrary.declarations[#somePredicateOfList] as VariableMirror).type as TypedefMirror; |
| TypedefMirror predicateDecl = predicateOfList.originalDeclaration as TypedefMirror; |
| |
| Expect.equals(predicateDecl, predicateOfDynamic.typeVariables[0].owner); |
| Expect.equals(predicateDecl, predicateOfList.typeVariables[0].owner); |
| Expect.equals(predicateDecl, predicateDecl.typeVariables[0].owner); |
| } |
| |
| main() { |
| testTypeVariableOfClass(); |
| testTypeVariableOfTypedef(); // //# 01: ok |
| } |