Allow InstanceMirror.invoke to find private members. Resolves issue 11771.

tests/lib/mirrors/invoke_private_test.dart

+// 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.
+
+library test.invoke_test;
+
+import 'dart:mirrors';
+
+import 'package:expect/expect.dart';
+import '../../async_helper.dart';
+
+class C {
+  var _field;
+  C() : this._field = 'default';
+  C._named(this._field);
+
+  get _getter => 'get $_field';
+  set _setter(v) => _field = 'set $v';
+  _method(x, y, z) => '$x+$y+$z';
+
+  static var _staticField = 'initial';
+  static get _staticGetter => 'sget $_staticField';
+  static set _staticSetter(v) => _staticField = 'sset $v';
+  static _staticFunction(x, y) => "($x,$y)";
+}
+
+var _libraryField = 'a priori';
+get _libraryGetter => 'lget $_libraryField';
+set _librarySetter(v) => _libraryField = 'lset $v';
+_libraryFunction(x,y) => '$x$y';
+
+main() {
+  var result;
+
+  // InstanceMirror.
+  C c = new C();
+  InstanceMirror im = reflect(c);
+  result = im.invoke(const Symbol('_method'), [2,4,8]);
+  Expect.equals('2+4+8', result.reflectee);
+
+  result = im.getField(const Symbol('_getter'));

[ahe, 2013/08/02 06:45:24]

It is a bug in the VM if it accepts this.

When I implemented this a few months ago, this was a compile-time error and
recognized as such by the VM:
https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/test...

The specification of Symbol constructor also clearly states that this is an
argument error:
https://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/sdk/...

Combine this with the language specification that says that any error arising
during the evaluation of a constant is a compile-time error.

Consequently, this is a compile-time error.

+  Expect.equals('get default', result.reflectee);
+  result = im.getField(const Symbol('_field'));
+  Expect.equals('default', result.reflectee);
+
+  im.setField(const Symbol('_setter'), 'foo');
+  Expect.equals('set foo', c._field);
+  im.setField(const Symbol('_field'), 'bar');
+  Expect.equals('bar', c._field);
+
+
+  // ClassMirror.
+  ClassMirror cm = reflectClass(C);
+  result = cm.invoke(const Symbol('_staticFunction'),[3,4]);
+  Expect.equals('(3,4)', result.reflectee);
+
+  result = cm.getField(const Symbol('_staticGetter'));
+  Expect.equals('sget initial', result.reflectee);
+  result = cm.getField(const Symbol('_staticField'));
+  Expect.equals('initial', result.reflectee);
+
+  cm.setField(const Symbol('_staticSetter'), 'sfoo');
+  Expect.equals('sset sfoo', C._staticField);
+  cm.setField(const Symbol('_staticField'), 'sbar');
+  Expect.equals('sbar', C._staticField);
+
+  result = cm.newInstance(const Symbol('_named'), ['my value']);
+  Expect.isTrue(result.reflectee is C);
+  Expect.equals('my value', result.reflectee._field);
+
+
+  // LibraryMirror.
+  LibraryMirror lm = cm.owner;
+  result = lm.invoke(const Symbol('_libraryFunction'),[':',')']);
+  Expect.equals(':)', result.reflectee);
+
+  result = lm.getField(const Symbol('_libraryGetter'));
+  Expect.equals('lget a priori', result.reflectee);
+  result = lm.getField(const Symbol('_libraryField'));
+  Expect.equals('a priori', result.reflectee);
+
+  lm.setField(const Symbol('_librarySetter'), 'lfoo');
+  Expect.equals('lset lfoo', _libraryField);
+  lm.setField(const Symbol('_libraryField'), 'lbar');
+  Expect.equals('lbar', _libraryField);
+}