num implements Comparable and Hashable.

tests/language/core_type_check_test.dart

Index: tests/language/core_type_check_test.dart
===================================================================
--- tests/language/core_type_check_test.dart	(revision 0)
+++ tests/language/core_type_check_test.dart	(revision 0)
@@ -0,0 +1,50 @@
+// Copyright (c) 2012, 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.
+
+check(value, expectComparable, expectHashable, expectPattern) {
+  Expect.equals(expectComparable, value is Comparable);
+  Expect.equals(expectHashable, value is Hashable);
+  Expect.equals(expectPattern, value is Pattern);
+}
+
+int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1));
+
+class A implements Comparable {
+}
+
+class B implements Hashable {
+}
+
+class C implements Comparable, Hashable {
+}
+
+class D implements Pattern {
+}
+
+class E implements Pattern, Comparable {
+}
+
+class F implements Pattern, Hashable {
+}
+
+class G implements Pattern, Hashable, Comparable {
+}
+
+main() {
+  var things = [[], 4, 4.2, 'foo', new Object(), new A(), new B(),
+                new C(), new D(), new E(), new F(), new G()];
+
+  check(things[inscrutable(0)], false, false, false); // List
+  check(things[inscrutable(1)], true, true, false); // int
+  check(things[inscrutable(2)], true, true, false); // num
+  check(things[inscrutable(3)], true, true, true); // string
+  check(things[inscrutable(4)], false, false, false); // Object
+  check(things[inscrutable(5)], true, false, false); // A
+  check(things[inscrutable(6)], false, true, false); // B
+  check(things[inscrutable(7)], true, true, false); // C
+  check(things[inscrutable(8)], false, false, true); // D
+  check(things[inscrutable(9)], true, false, true); // E
+  check(things[inscrutable(10)], false, true, true); // F
+  check(things[inscrutable(11)], true, true, true); // G
+}