| // 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 |
| |
| import "dart:mirrors"; |
| |
| import "package:expect/expect.dart"; |
| |
| class MultiArityFunction implements Function { |
| noSuchMethod(Invocation msg) { |
| if (msg.memberName != #call) return super.noSuchMethod(msg); |
| return msg.positionalArguments.join(","); |
| } |
| } |
| |
| main() { |
| dynamic f = new MultiArityFunction(); |
| |
| Expect.isTrue(f is Function); |
| Expect.equals('a', f('a')); |
| Expect.equals('a,b', f('a', 'b')); |
| Expect.equals('a,b,c', f('a', 'b', 'c')); |
| Expect.equals('a', Function.apply(f, ['a'])); |
| Expect.equals('a,b', Function.apply(f, ['a', 'b'])); |
| Expect.equals('a,b,c', Function.apply(f, ['a', 'b', 'c'])); |
| Expect.throwsNoSuchMethodError(() => f.foo('a', 'b', 'c')); |
| |
| ClosureMirror cm = reflect(f) as ClosureMirror; |
| Expect.isTrue(cm is ClosureMirror); |
| Expect.equals('a', cm.apply(['a']).reflectee); |
| Expect.equals('a,b', cm.apply(['a', 'b']).reflectee); |
| Expect.equals('a,b,c', cm.apply(['a', 'b', 'c']).reflectee); |
| |
| MethodMirror mm = cm.function; |
| Expect.isNull(mm); |
| |
| ClassMirror km = cm.type; |
| Expect.equals(reflectClass(MultiArityFunction), km); |
| } |