Parse argument definition test expressions.

dart/tests/compiler/dart2js_extra/argument_definition_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.
+
+// Test parsing and resolution of argument definition test.
+
+int test(int a, [int b = 2, int c = 3]) {
+  int result = 0;
+  print(?b);
+  print(?result);  /// 01: compile-time error
+  print(?a);
+  print(?b);
+  print(?c);
+  {
+    var b;
+    ?b;  /// 02: compile-time error
+  }
+  print((!?a?!?b:!?c) == (?a??b:?c));
+  print(!?a?!?b:!?c == ?a??b:?c);
+}
+
+closure_test(int a, [int b = 2, int c = 3]) {
+  var x = 0;
+  return () {
+    int result = 0;
+    print(?b);
+    print(?result);  /// 03: compile-time error
+    print(?x);  /// 04: compile-time error
+    print(?a);
+    print(?b);
+    print(?c);
+    {
+      var b;
+      ?b;  /// 05: compile-time error
+    }
+    print((!?a?!?b:!?c) == (?a??b:?c));
+    print(!?a?!?b:!?c == ?a??b:?c);
+  };
+}
+
+main() {
+  test(1);
+  test(1, 2);
+  test(1, 2, 3);
+  test(1, c:3);
+
+  closure_test(1)();
+  closure_test(1, 2)();
+  closure_test(1, 2, 3)();
+  closure_test(1, c:3)();
+}