Use predicates to check simple function types.

tests/language/function_subtype_simple1_test.dart

Index: tests/language/function_subtype_simple1_test.dart
diff --git a/tests/language/function_subtype_simple1_test.dart b/tests/language/function_subtype_simple1_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..1e523cc260dd38b43afd43951aad2723f702ebb0
--- /dev/null
+++ b/tests/language/function_subtype_simple1_test.dart
@@ -0,0 +1,322 @@
+// 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 of simple function types.
+
+import 'package:expect/expect.dart';
+
+typedef Args0();
+typedef Args1(a);
+typedef Args2(a, b);
+typedef Args3(a, b, c);
+typedef Args4(a, b, c, d);
+typedef Args5(a, b, c, d, e);
+typedef Args6(a, b, c, d, e, f);
+typedef Args7(a, b, c, d, e, f, g);
+typedef Args8(a, b, c, d, e, f, g, h);
+typedef Args9(a, b, c, d, e, f, g, h, i);
+typedef Args10(a, b, c, d, e, f, g, h, i, j);
+typedef Args11(a, b, c, d, e, f, g, h, i, j, k);
+typedef Args12(a, b, c, d, e, f, g, h, i, j, k, l);
+typedef Args13(a, b, c, d, e, f, g, h, i, j, k, l, m);
+typedef Args14(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
+typedef Args15(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
+
+void args0() {}
+void args1(int a) {}
+void args2(int a, int b) {}
+void args3(int a, int b, int c) {}
+void args4(int a, int b, int c, int d) {}
+void args5(int a, int b, int c, int d, int e) {}
+void args6(int a, int b, int c, int d, int e, int f) {}
+void args7(int a, int b, int c, int d, int e, int f, int g) {}
+void args8(int a, int b, int c, int d, int e, int f, int g, int h) {}
+void args9(int a, int b, int c, int d, int e, int f, int g, int h, int i) {}
+void args10(int a, int b, int c, int d, int e, int f, int g, int h, int i,
+            int j) {}
+void args11(int a, int b, int c, int d, int e, int f, int g, int h, int i,
+            int j, int k) {}
+void args12(int a, int b, int c, int d, int e, int f, int g, int h, int i,
+            int j, int k, int l) {}
+void args13(int a, int b, int c, int d, int e, int f, int g, int h, int i,
+            int j, int k, int l, int m) {}
+void args14(int a, int b, int c, int d, int e, int f, int g, int h, int i,
+            int j, int k, int l, int m, int n) {}
+void args15(int a, int b, int c, int d, int e, int f, int g, int h, int i,
+            int j, int k, int l, int m, int n, int o) {}
+
+main() {
+  Expect.isTrue(args0 is Args0);
+  Expect.isFalse(args0 is Args1);
+  Expect.isFalse(args0 is Args2);
+  Expect.isFalse(args0 is Args3);
+  Expect.isFalse(args0 is Args4);
+  Expect.isFalse(args0 is Args5);
+  Expect.isFalse(args0 is Args6);
+  Expect.isFalse(args0 is Args7);
+  Expect.isFalse(args0 is Args8);
+  Expect.isFalse(args0 is Args9);
+  Expect.isFalse(args0 is Args10);
+  Expect.isFalse(args0 is Args11);
+  Expect.isFalse(args0 is Args12);
+  Expect.isFalse(args0 is Args13);
+  Expect.isFalse(args0 is Args14);
+  Expect.isFalse(args0 is Args15);
+
+  Expect.isFalse(args1 is Args0);
+  Expect.isTrue(args1 is Args1);
+  Expect.isFalse(args1 is Args2);
+  Expect.isFalse(args1 is Args3);
+  Expect.isFalse(args1 is Args4);
+  Expect.isFalse(args1 is Args5);
+  Expect.isFalse(args1 is Args6);
+  Expect.isFalse(args1 is Args7);
+  Expect.isFalse(args1 is Args8);
+  Expect.isFalse(args1 is Args9);
+  Expect.isFalse(args1 is Args10);
+  Expect.isFalse(args1 is Args11);
+  Expect.isFalse(args1 is Args12);
+  Expect.isFalse(args1 is Args13);
+  Expect.isFalse(args1 is Args14);
+  Expect.isFalse(args1 is Args15);
+
+  Expect.isFalse(args2 is Args0);
+  Expect.isFalse(args2 is Args1);
+  Expect.isTrue(args2 is Args2);
+  Expect.isFalse(args2 is Args3);
+  Expect.isFalse(args2 is Args4);
+  Expect.isFalse(args2 is Args5);
+  Expect.isFalse(args2 is Args6);
+  Expect.isFalse(args2 is Args7);
+  Expect.isFalse(args2 is Args8);
+  Expect.isFalse(args2 is Args9);
+  Expect.isFalse(args2 is Args10);
+  Expect.isFalse(args2 is Args11);
+  Expect.isFalse(args2 is Args12);
+  Expect.isFalse(args2 is Args13);
+  Expect.isFalse(args2 is Args14);
+  Expect.isFalse(args2 is Args15);
+
+  Expect.isFalse(args3 is Args0);
+  Expect.isFalse(args3 is Args1);
+  Expect.isFalse(args3 is Args2);
+  Expect.isTrue(args3 is Args3);
+  Expect.isFalse(args3 is Args4);
+  Expect.isFalse(args3 is Args5);
+  Expect.isFalse(args3 is Args6);
+  Expect.isFalse(args3 is Args7);
+  Expect.isFalse(args3 is Args8);
+  Expect.isFalse(args3 is Args9);
+  Expect.isFalse(args3 is Args10);
+  Expect.isFalse(args3 is Args11);
+  Expect.isFalse(args3 is Args12);
+  Expect.isFalse(args3 is Args13);
+  Expect.isFalse(args3 is Args14);
+  Expect.isFalse(args3 is Args15);
+
+  Expect.isFalse(args4 is Args0);
+  Expect.isFalse(args4 is Args1);
+  Expect.isFalse(args4 is Args2);
+  Expect.isFalse(args4 is Args3);
+  Expect.isTrue(args4 is Args4);
+  Expect.isFalse(args4 is Args5);
+  Expect.isFalse(args4 is Args6);
+  Expect.isFalse(args4 is Args7);
+  Expect.isFalse(args4 is Args8);
+  Expect.isFalse(args4 is Args9);
+  Expect.isFalse(args4 is Args10);
+  Expect.isFalse(args4 is Args11);
+  Expect.isFalse(args4 is Args12);
+  Expect.isFalse(args4 is Args13);
+  Expect.isFalse(args4 is Args14);
+  Expect.isFalse(args4 is Args15);
+
+  Expect.isFalse(args5 is Args0);
+  Expect.isFalse(args5 is Args1);
+  Expect.isFalse(args5 is Args2);
+  Expect.isFalse(args5 is Args3);
+  Expect.isFalse(args5 is Args4);
+  Expect.isTrue(args5 is Args5);
+  Expect.isFalse(args5 is Args6);
+  Expect.isFalse(args5 is Args7);
+  Expect.isFalse(args5 is Args8);
+  Expect.isFalse(args5 is Args9);
+  Expect.isFalse(args5 is Args10);
+  Expect.isFalse(args5 is Args11);
+  Expect.isFalse(args5 is Args12);
+  Expect.isFalse(args5 is Args13);
+  Expect.isFalse(args5 is Args14);
+  Expect.isFalse(args5 is Args15);
+
+  Expect.isFalse(args6 is Args0);
+  Expect.isFalse(args6 is Args1);
+  Expect.isFalse(args6 is Args2);
+  Expect.isFalse(args6 is Args3);
+  Expect.isFalse(args6 is Args4);
+  Expect.isFalse(args6 is Args5);
+  Expect.isTrue(args6 is Args6);
+  Expect.isFalse(args6 is Args7);
+  Expect.isFalse(args6 is Args8);
+  Expect.isFalse(args6 is Args9);
+  Expect.isFalse(args6 is Args10);
+  Expect.isFalse(args6 is Args11);
+  Expect.isFalse(args6 is Args12);
+  Expect.isFalse(args6 is Args13);
+  Expect.isFalse(args6 is Args14);
+  Expect.isFalse(args6 is Args15);
+
+  Expect.isFalse(args7 is Args0);
+  Expect.isFalse(args7 is Args1);
+  Expect.isFalse(args7 is Args2);
+  Expect.isFalse(args7 is Args3);
+  Expect.isFalse(args7 is Args4);
+  Expect.isFalse(args7 is Args5);
+  Expect.isFalse(args7 is Args6);
+  Expect.isTrue(args7 is Args7);
+  Expect.isFalse(args7 is Args8);
+  Expect.isFalse(args7 is Args9);
+  Expect.isFalse(args7 is Args10);
+  Expect.isFalse(args7 is Args11);
+  Expect.isFalse(args7 is Args12);
+  Expect.isFalse(args7 is Args13);
+  Expect.isFalse(args7 is Args14);
+  Expect.isFalse(args7 is Args15);
+
+  Expect.isFalse(args8 is Args0);
+  Expect.isFalse(args8 is Args1);
+  Expect.isFalse(args8 is Args2);
+  Expect.isFalse(args8 is Args3);
+  Expect.isFalse(args8 is Args4);
+  Expect.isFalse(args8 is Args5);
+  Expect.isFalse(args8 is Args6);
+  Expect.isFalse(args8 is Args7);
+  Expect.isTrue(args8 is Args8);
+  Expect.isFalse(args8 is Args9);
+  Expect.isFalse(args8 is Args10);
+  Expect.isFalse(args8 is Args11);
+  Expect.isFalse(args8 is Args12);
+  Expect.isFalse(args8 is Args13);
+  Expect.isFalse(args8 is Args14);
+  Expect.isFalse(args8 is Args15);
+
+  Expect.isFalse(args9 is Args0);
+  Expect.isFalse(args9 is Args1);
+  Expect.isFalse(args9 is Args2);
+  Expect.isFalse(args9 is Args3);
+  Expect.isFalse(args9 is Args4);
+  Expect.isFalse(args9 is Args5);
+  Expect.isFalse(args9 is Args6);
+  Expect.isFalse(args9 is Args7);
+  Expect.isFalse(args9 is Args8);
+  Expect.isTrue(args9 is Args9);
+  Expect.isFalse(args9 is Args10);
+  Expect.isFalse(args9 is Args11);
+  Expect.isFalse(args9 is Args12);
+  Expect.isFalse(args9 is Args13);
+  Expect.isFalse(args9 is Args14);
+  Expect.isFalse(args9 is Args15);
+
+  Expect.isFalse(args10 is Args0);
+  Expect.isFalse(args10 is Args1);
+  Expect.isFalse(args10 is Args2);
+  Expect.isFalse(args10 is Args3);
+  Expect.isFalse(args10 is Args4);
+  Expect.isFalse(args10 is Args5);
+  Expect.isFalse(args10 is Args6);
+  Expect.isFalse(args10 is Args7);
+  Expect.isFalse(args10 is Args8);
+  Expect.isFalse(args10 is Args9);
+  Expect.isTrue(args10 is Args10);
+  Expect.isFalse(args10 is Args11);
+  Expect.isFalse(args10 is Args12);
+  Expect.isFalse(args10 is Args13);
+  Expect.isFalse(args10 is Args14);
+  Expect.isFalse(args10 is Args15);
+
+  Expect.isFalse(args11 is Args0);
+  Expect.isFalse(args11 is Args1);
+  Expect.isFalse(args11 is Args2);
+  Expect.isFalse(args11 is Args3);
+  Expect.isFalse(args11 is Args4);
+  Expect.isFalse(args11 is Args5);
+  Expect.isFalse(args11 is Args6);
+  Expect.isFalse(args11 is Args7);
+  Expect.isFalse(args11 is Args8);
+  Expect.isFalse(args11 is Args9);
+  Expect.isFalse(args11 is Args10);
+  Expect.isTrue(args11 is Args11);
+  Expect.isFalse(args11 is Args12);
+  Expect.isFalse(args11 is Args13);
+  Expect.isFalse(args11 is Args14);
+  Expect.isFalse(args11 is Args15);
+
+  Expect.isFalse(args12 is Args0);
+  Expect.isFalse(args12 is Args1);
+  Expect.isFalse(args12 is Args2);
+  Expect.isFalse(args12 is Args3);
+  Expect.isFalse(args12 is Args4);
+  Expect.isFalse(args12 is Args5);
+  Expect.isFalse(args12 is Args6);
+  Expect.isFalse(args12 is Args7);
+  Expect.isFalse(args12 is Args8);
+  Expect.isFalse(args12 is Args9);
+  Expect.isFalse(args12 is Args10);
+  Expect.isFalse(args12 is Args11);
+  Expect.isTrue(args12 is Args12);
+  Expect.isFalse(args12 is Args13);
+  Expect.isFalse(args12 is Args14);
+  Expect.isFalse(args12 is Args15);
+
+  Expect.isFalse(args13 is Args0);
+  Expect.isFalse(args13 is Args1);
+  Expect.isFalse(args13 is Args2);
+  Expect.isFalse(args13 is Args3);
+  Expect.isFalse(args13 is Args4);
+  Expect.isFalse(args13 is Args5);
+  Expect.isFalse(args13 is Args6);
+  Expect.isFalse(args13 is Args7);
+  Expect.isFalse(args13 is Args8);
+  Expect.isFalse(args13 is Args9);
+  Expect.isFalse(args13 is Args10);
+  Expect.isFalse(args13 is Args11);
+  Expect.isFalse(args13 is Args12);
+  Expect.isTrue(args13 is Args13);
+  Expect.isFalse(args13 is Args14);
+  Expect.isFalse(args13 is Args15);
+
+  Expect.isFalse(args14 is Args0);
+  Expect.isFalse(args14 is Args1);
+  Expect.isFalse(args14 is Args2);
+  Expect.isFalse(args14 is Args3);
+  Expect.isFalse(args14 is Args4);
+  Expect.isFalse(args14 is Args5);
+  Expect.isFalse(args14 is Args6);
+  Expect.isFalse(args14 is Args7);
+  Expect.isFalse(args14 is Args8);
+  Expect.isFalse(args14 is Args9);
+  Expect.isFalse(args14 is Args10);
+  Expect.isFalse(args14 is Args11);
+  Expect.isFalse(args14 is Args12);
+  Expect.isFalse(args14 is Args13);
+  Expect.isTrue(args14 is Args14);
+  Expect.isFalse(args14 is Args15);
+
+  Expect.isFalse(args15 is Args0);
+  Expect.isFalse(args15 is Args1);
+  Expect.isFalse(args15 is Args2);
+  Expect.isFalse(args15 is Args3);
+  Expect.isFalse(args15 is Args4);
+  Expect.isFalse(args15 is Args5);
+  Expect.isFalse(args15 is Args6);
+  Expect.isFalse(args15 is Args7);
+  Expect.isFalse(args15 is Args8);
+  Expect.isFalse(args15 is Args9);
+  Expect.isFalse(args15 is Args10);
+  Expect.isFalse(args15 is Args11);
+  Expect.isFalse(args15 is Args12);
+  Expect.isFalse(args15 is Args13);
+  Expect.isFalse(args15 is Args14);
+  Expect.isTrue(args15 is Args15);
+}