lib: add `meta` as a user-level empty shell for meta-classes

[nit.git] / tests / test_meta.nit

diff --git a/tests/test_meta.nit b/tests/test_meta.nit
new file mode 100644 (file)
index 0000000..936982e
--- /dev/null
+++ b/tests/test_meta.nit
@@ -0,0 +1,56 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import meta
+
+class XObject
+       redef type CLASS: XClass[SELF]
+       redef fun class_factory(name) do return new XClass[SELF](name)
+end
+
+class XClass[E: XObject]
+       super Class[E]
+end
+
+class YObject
+       redef type CLASS: YClass[SELF]
+       redef fun class_factory(name) do return new YClass[SELF](name)
+end
+
+class YClass[E: YObject]
+       super Class[E]
+       super YObject # Yeah, a meta-loop!
+end
+
+var s = "hello"
+print s.class_name
+print s.get_class
+print s.get_class.get_class
+print s.get_class.get_class.get_class
+
+print ""
+
+var x = new XObject
+print x.class_name
+print x.get_class
+print x.get_class.get_class
+print x.get_class.get_class.get_class
+
+print ""
+
+var y = new YObject
+print y.class_name
+print y.get_class
+print y.get_class.get_class
+print y.get_class.get_class.get_class