Support runtime check of function types.

tests/language/function_subtype_call2_test.dart

Index: tests/language/function_subtype_call2_test.dart
diff --git a/tests/language/function_subtype_call2_test.dart b/tests/language/function_subtype_call2_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..8dabe8f97ac1bb3905405b10fe83d128f9baf6e3
--- /dev/null
+++ b/tests/language/function_subtype_call2_test.dart
@@ -0,0 +1,60 @@
+// 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.
+// Dart test program for constructors and initializers.
+
+// Check function subtyping for classes with call functions.
+
+import 'package:expect/expect.dart';
+
+typedef void Foo(bool a, [String b]);
+typedef void Bar(bool a, [String b]);
+typedef void Baz(bool a, {String b});
+typedef void Boz(bool a);
+
+class C1<T> {
+  void call(T a, [String b]) {}
+}
+
+class D1<S, T> extends C1<T> {}
+
+class C2<T> {
+  void call(T a, {String b}) {}
+}
+
+class D2<S, T> extends C2<T> {}
+
+main() {
+  Expect.isTrue(new D1<String, bool>() is Foo, 'new D1<String, bool>() is Foo');
+  Expect.isTrue(new D1<String, bool>() is Bar, 'new D1<String, bool>() is Bar');
+  Expect.isFalse(new D1<String, bool>() is Baz,
+                 'new D1<String, bool>() is Baz');
+  Expect.isTrue(new D1<String, bool>() is Boz, 'new D1<String, bool>() is Boz');
+
+  Expect.isFalse(new D1<bool, int>() is Foo, 'new D1<bool, int>() is Foo');
+  Expect.isFalse(new D1<bool, int>() is Bar, 'new D1<bool, int>() is Bar');
+  Expect.isFalse(new D1<bool, int>() is Baz, 'new D1<bool, int>() is Baz');
+  Expect.isFalse(new D1<bool, int>() is Boz, 'new D1<bool, int>() is Boz');
+
+  Expect.isTrue(new D1() is Foo, 'new D1() is Foo');
+  Expect.isTrue(new D1() is Bar, 'new D1() is Bar');
+  Expect.isFalse(new D1() is Baz, 'new D1() is Baz');
+  Expect.isTrue(new D1() is Boz, 'new D1() is Boz');
+
+  Expect.isFalse(new D2<String, bool>() is Foo,
+                 'new D2<String, bool>() is Foo');
+  Expect.isFalse(new D2<String, bool>() is Bar,
+                 'new D2<String, bool>() is Bar');
+  Expect.isTrue(new D2<String, bool>() is Baz, 'new D2<String, bool>() is Baz');
+  Expect.isTrue(new D2<String, bool>() is Boz, 'new D2<String, bool>() is Boz');
+
+  Expect.isFalse(new D2<bool, int>() is Foo, 'new D2<bool, int>() is Foo');
+  Expect.isFalse(new D2<bool, int>() is Bar, 'new D2<bool, int>() is Bar');
+  Expect.isFalse(new D2<bool, int>() is Baz, 'new D2<bool, int>() is Baz');
+  Expect.isFalse(new D2<bool, int>() is Boz, 'new D2<bool, int>() is Boz');
+
+  Expect.isFalse(new D2() is Foo, 'new D2() is Foo');
+  Expect.isFalse(new D2() is Bar, 'new D2() is Bar');
+  Expect.isTrue(new D2() is Baz, 'new D2() is Baz');
+  Expect.isTrue(new D2() is Boz, 'new D2() is Boz');
+}