Disallow mixing in classes that have constructors.

tests/language/mixin_illegal_constructor_test.dart

+// 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.
+

[Johnni Winther, 2013/01/22 11:46:44]

There is no case where the constructor is synthesized.

[kasperl, 2013/01/22 11:50:45]

Well, that is generally the case for mixins so that should be well covered by
all the positive test cases.

+class M0 {
+  factory M0(a,b,c) => null;
+  factory M0.named() => null;
+}
+
+class M1 {
+  M1();
+}
+
+class M2 {
+  M2.named();
+}
+
+typedef C0 = Object with M0;
+typedef C1 = Object with M1;      /// 01: compile-time error
+typedef C2 = Object with M2;      /// 02: compile-time error
+typedef C3 = Object with M0, M1;  /// 03: compile-time error
+typedef C4 = Object with M1, M0;  /// 04: compile-time error
+typedef C5 = Object with M0, M2;  /// 05: compile-time error
+typedef C6 = Object with M2, M0;  /// 06: compile-time error
+
+class D0 extends Object with M0 { }
+class D1 extends Object with M1 { }      /// 07: compile-time error
+class D2 extends Object with M2 { }      /// 08: compile-time error
+class D3 extends Object with M0, M1 { }  /// 09: compile-time error
+class D4 extends Object with M1, M0 { }  /// 10: compile-time error
+class D5 extends Object with M0, M2 { }  /// 11: compile-time error
+class D6 extends Object with M2, M0 { }  /// 12: compile-time error
+
+main() {
+  new C0();
+  new C1();  /// 01: continued
+  new C2();  /// 02: continued
+  new C3();  /// 03: continued
+  new C4();  /// 04: continued
+  new C5();  /// 05: continued
+  new C6();  /// 06: continued
+
+  new D0();
+  new D1();  /// 07: continued
+  new D2();  /// 08: continued
+  new D3();  /// 09: continued
+  new D4();  /// 10: continued
+  new D5();  /// 11: continued
+  new D6();  /// 12: continued
+
+  new C0(1,2,3);   /// 13: static type warning, runtime error
+  new C0.named();  /// 14: static type warning, runtime error
+  new D0(1,2,3);   /// 15: static type warning, runtime error
+  new D0.named();  /// 16: static type warning, runtime error
+}