Implement new optional parameters syntax in the vm (issue 4290).

tests/language/optional_named_parameters_test.dart

+// 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.
+// Dart test program for testing optional named parameters.
+
+
+class OptionalNamedParametersTest {
+
+  static int F00() {
+    return 0;
+  }
+
+  int f11() {
+    return 0;
+  }
+
+  static int F11(int a) {
+    return a;
+  }
+
+  int f22(int a) {
+    return a;
+  }
+
+  static int F10({int b: 20}) {
+    return b;
+  }
+
+  int f21({int b: 20}) {
+    return b;
+  }
+
+  static int F21(int a, {int b: 20}) {
+    return 100*a + b;
+  }
+
+  int f32(int a, {int b: 20}) {
+    return 100*a + b;
+  }
+
+  static int F31(int a, {int b: 20, int c: 30}) {
+    return 100*(100*a + b) + c;
+  }
+
+  int f42(int a, {int b: 20, int c: 30}) {
+    return 100*(100*a + b) + c;
+  }
+
+  static int F41(int a, {int b: 20, int c, int d: 40}) {
+    return 100*(100*(100*a + b) + (?c ? c : 0)) + d;
+  }
+
+  int f52(int a, {int b: 20, int c, int d: 40}) {
+    return 100*(100*(100*a + b) + (?c ? c : 0)) + d;
+  }
+
+  static void test() {
+    OptionalNamedParametersTest np = new OptionalNamedParametersTest();
+    Expect.equals(0, F00());
+    Expect.equals(0, np.f11());
+    Expect.equals(10, F11(10));
+    Expect.equals(10, np.f22(10));
+    Expect.equals(20, F10());
+    Expect.equals(20, np.f21());
+    Expect.equals(20, F10(20));
+    Expect.equals(20, np.f21(20));
+    Expect.equals(20, F10(b:20));
+    Expect.equals(20, np.f21(b:20));
+    Expect.equals(1020, F21(10));
+    Expect.equals(1020, np.f32(10));
+    Expect.equals(1025, F21(10, 25));
+    Expect.equals(1025, np.f32(10, 25));
+    Expect.equals(1025, F21(10, b:25));
+    Expect.equals(1025, np.f32(10, b:25));
+    Expect.equals(102030, F31(10));
+    Expect.equals(102030, np.f42(10));
+    Expect.equals(102530, F31(10, 25));
+    Expect.equals(102530, np.f42(10, 25));
+    Expect.equals(102530, F31(10, b:25));
+    Expect.equals(102530, np.f42(10, b:25));
+    Expect.equals(102035, F31(10, c:35));
+    Expect.equals(102035, np.f42(10, c:35));
+    Expect.equals(102535, F31(10, b:25, c:35));
+    Expect.equals(102535, np.f42(10, b:25, c:35));
+    Expect.equals(102535, F31(10, 25, c:35));
+    Expect.equals(102535, np.f42(10, 25, c:35));
+    Expect.equals(102535, F31(10, c:35, b:25));
+    Expect.equals(102535, np.f42(10, c:35, b:25));
+    Expect.equals(10200040, F41(10));
+    Expect.equals(10200040, np.f52(10));
+    Expect.equals(10203540, F41(10, c:35));
+    Expect.equals(10203540, np.f52(10, c:35));
+    Expect.equals(10250045, F41(10, d:45, b:25));
+    Expect.equals(10250045, F41(10, 25, d:45));
+    Expect.equals(10250045, np.f52(10, d:45, b:25));
+    Expect.equals(10253545, F41(10, d:45, c:35, b:25));
+    Expect.equals(10253545, np.f52(10, d:45, c:35, b:25));
+  }
+}
+
+main() {
+  OptionalNamedParametersTest.test();
+}
+
+// TODO(regis): negative tests: [} {] [a:0] {a=0}