Add a limited version of ParameterMirrors that can only tell whether they are

lib/mirrors/mirrors.dart

Index: lib/mirrors/mirrors.dart
===================================================================
--- lib/mirrors/mirrors.dart	(revision 9646)
+++ lib/mirrors/mirrors.dart	(working copy)
@@ -355,9 +355,38 @@
    * Does this mirror reflect a factory constructor?
    */
   bool isFactoryConstructor;
+
+  /**
+   * Returns the list of parameters for this method.
+   */
+  List<ParameterMirror> parameters();
 }
 
+/**
+ * A formal parameter.

[turnidge, 2012/07/13 23:37:12]

Make this comment look more like others in the file.

/*
 *A [Blah] is a blah.

+ */
+interface ParameterMirror extends VariableMirror {
+  /**
+   * Returns the type of this parameter.
+   */
+  TypeMirror type();
 
+  /**
+   * Returns the default value for this parameter.
+   */
+  String defaultValue();
+
+  /**
+   * Returns true if this parameter has a default value.
+   */
+  bool hasDefaultValue();
+
+  /**
+   * Returns true if this parameter is optional.
+   */
+  bool isOptional();
+}
+
 /**
  * A [VariableMirror] reflects a Dart language variable.
  */