Language/Metadata/before_param_t01.dart

/*
 * Copyright (c) 2015, 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 Metadata can appear before  ...  parameter ...
 * @description Check that metadata is allowed before class constructor
 * parameter
 * @author a.semenov@unipro.ru
 */
import 'dart:mirrors';
import '../../Utils/expect.dart';

class A {
  const A();
}

class B {
  B(@A() int b);
  B.b(@A() int b);
}

main() {
  Symbol ctorName1 = MirrorSystem.getSymbol('B');
  DeclarationMirror ctorMirror1 = reflectClass(B).declarations[ctorName1];
  ParameterMirror paramMirror1 = (ctorMirror1 as MethodMirror).parameters[0];
  InstanceMirror aMirror1 = paramMirror1.metadata[0];
  Expect.equals('.A', MirrorSystem.getName(aMirror1.type.qualifiedName));

  Symbol ctorName2 = MirrorSystem.getSymbol('B.b');
  DeclarationMirror ctorMirror2 = reflectClass(B).declarations[ctorName2];
  ParameterMirror paramMirror2 = (ctorMirror2 as MethodMirror).parameters[0];
  InstanceMirror aMirror2 = paramMirror2.metadata[0];
  Expect.equals('.A', MirrorSystem.getName(aMirror2.type.qualifiedName));
}