File watching package.

pkg/watcher/lib/src/change_type.dart

Index: pkg/watcher/lib/src/change_type.dart
diff --git a/pkg/watcher/lib/src/change_type.dart b/pkg/watcher/lib/src/change_type.dart
new file mode 100644
index 0000000000000000000000000000000000000000..55358e1b527dea2f136a9024632ac55fe64d18a5
--- /dev/null
+++ b/pkg/watcher/lib/src/change_type.dart
@@ -0,0 +1,28 @@
+// 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 watcher.change_type;
+
+/// Enum for what kind of change has happened to a file.
+class ChangeType {
+  /// A new file has been added.
+  static const ADD = const ChangeType(0);

[nweiz, 2013/07/11 00:25:01]

I think it's a little cleaner to use the name of the enum value rather than an
opaque integer (as we do in e.g. log.dart in pub).

[Bob Nystrom, 2013/07/11 18:33:20]

I think I heard one of the VM guys say numbers are faster or something. <shrug>

Changed to strings. I like that too.

+
+  /// A file has been removed.
+  static const REMOVE = const ChangeType(1);
+
+  /// The contents of a file have changed.
+  static const MODIFY = const ChangeType(2);
+
+  final int _value;
+  const ChangeType(this._value);
+
+  String toString() {
+    switch (this) {
+      case ChangeType.ADD: return "add";
+      case ChangeType.REMOVE: return "remove";
+      case ChangeType.MODIFY: return "modify";
+    }
+  }
+}