Initial stream support

lib/src/mirrors.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 fancy_syntax.mirrors;
+
+import 'dart:mirrors';
+
+/**
+ * Walks up the class hierarchy to find a method declaration with the given
+ * [name].
+ *
+ * Note that it's not possible to tell if there's an implementation via
+ * noSuchMethod().
+ */
+Mirror getMemberMirror(ClassMirror classMirror, Symbol name) {
+  if (classMirror.members.containsKey(name)) {
+    return classMirror.members[name];
+  }
+  if (hasSuperclass(classMirror)) {
+    var mirror = getMemberMirror(classMirror.superclass, name);
+    if (mirror != null) {
+      return mirror;
+    }
+  }
+  for (ClassMirror supe in classMirror.superinterfaces) {
+    var mirror = getMemberMirror(supe, name);
+    if (mirror != null) {
+      return mirror;
+    }
+  }
+  return null;
+}
+
+ClassMirror __objMirror;
+ClassMirror get _objMirror {
+  if (__objMirror == null) {
+    __objMirror = reflectClass(Object);
+  }
+  return __objMirror;
+}
+
+/**
+ * Work-around for http://dartbug.com/5794
+ */
+bool hasSuperclass(ClassMirror classMirror) {
+  var superclass = classMirror.superclass;
+  return (superclass != null) && (superclass != _objMirror);
+}