dart-lang#2559. Add tests checking that augment is a built-in ident…

…ifier

Language/Expressions/Identifier_Reference/built_in_identifier_A26_t01.dart

@@ -0,0 +1,31 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a syntax error if a built-in identifier is used as the
+/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
+/// or extension.
+///
+/// @description Checks that it is a compile-time error if a built-in identifier
+/// `augment` is used as the declared name of a class, mixin or enum.
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+class augment {}
+//    ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+mixin augment {}
+//    ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+enum augment {e1;}
+//   ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+}

Language/Expressions/Identifier_Reference/built_in_identifier_A26_t02.dart

@@ -0,0 +1,50 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a syntax error if a built-in identifier is used as the
+/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
+/// or extension.
+///
+/// @description Checks that it is a compile-time error if a built-in identifier
+/// `augment` is used as the declared name of a type variable.
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+class C<augment> {
+//      ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
+
+mixin M<augment> {
+//      ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
+
+enum E<augment> {
+//     ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  e1;
+}
+
+void foo<augment>() {}
+//       ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+extension Ext<augment> on List {}
+//            ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+  print(C);
+  print(M);
+  print(E);
+  print(foo);
+  print(List);
+}

Language/Expressions/Identifier_Reference/built_in_identifier_A26_t03.dart

@@ -0,0 +1,26 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a syntax error if a built-in identifier is used as the
+/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
+/// or extension.
+///
+/// @description Checks that it is a compile-time error if a built-in identifier
+/// `augment` is used as the declared name of a type alias.
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+typedef int augment();
+//          ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+typedef augment = int;
+//      ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+}

Language/Expressions/Identifier_Reference/built_in_identifier_A26_t04.dart

@@ -0,0 +1,22 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a syntax error if a built-in identifier is used as the
+/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
+/// or extension.
+///
+/// @description Checks that it is a compile-time error if a built-in identifier
+/// `augment` is used as the declared name of a prefix.
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import "../lib.dart" as augment;
+//                      ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+  augment.x;
+}

Language/Expressions/Identifier_Reference/built_in_identifier_A26_t05.dart

@@ -0,0 +1,21 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a syntax error if a built-in identifier is used as the
+/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
+/// or extension.
+///
+/// @description Checks that it is a compile-time error if a built-in identifier
+/// `augment` is used as the name of an extension.
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+extension augment on int {}
+//        ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+}

Language/Expressions/Identifier_Reference/built_in_identifier_A26_t06.dart

@@ -0,0 +1,33 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a syntax error if a built-in identifier is used as the
+/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
+/// or extension.
+///
+/// @description Checks that it is a compile-time error if a built-in identifier
+/// `augment` is used as the name, type parameter or alias of an extension type
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+extension type augment(int _) {}
+//             ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+extension type ListET<augment>(List<augment> _) {}
+//                    ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+extension type ET(int _) {}
+
+typedef augment = ET;
+//      ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+}