syntax: merge nullable information on type evolution

[nit.git] / tests / base_var_type_evolution.nit

diff --git a/tests/base_var_type_evolution.nit b/tests/base_var_type_evolution.nit
new file mode 100644 (file)
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+++ b/tests/base_var_type_evolution.nit
@@ -0,0 +1,76 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2010 Jean Privat <jean@pryen.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 kernel
+
+class A
+       fun a do 'A'.output
+end
+
+class B
+special A
+       fun b do 'B'.output
+end
+
+class C
+special A
+       fun c do 'C'.output
+end
+
+fun rand: Bool do return true
+
+var a = new A
+if rand then
+       a = new B
+end
+a.a
+#alt1#a.b
+'\n'.output
+
+a = new B
+if rand then
+       a = new B
+       #alt2#a = new C
+       #alt3#a = new A
+end
+a.a
+a.b
+'\n'.output
+
+a = new A
+if rand then
+       a = new B
+       #alt4#a = new C
+else
+       a = new B
+       #alt5#a = new C
+end
+a.a
+a.b
+'\n'.output
+
+a = new A
+if rand then
+       a = new B
+else
+       a = new C
+       abort#!alt6#
+end
+a.a
+a.b
+#alt7#a.c
+'\n'.output
+