syntax: fix type evolution on non nullable type

[nit.git] / tests / base_var_type_evolution_null3.nit

diff --git a/tests/base_var_type_evolution_null3.nit b/tests/base_var_type_evolution_null3.nit
new file mode 100644 (file)
index 0000000..a1ae9ca
--- /dev/null
+++ b/tests/base_var_type_evolution_null3.nit
@@ -0,0 +1,63 @@
+# 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 G[A: nullable Object]
+       var _a: A
+       init (a: A) do _a = a
+
+       fun run
+       do
+               var a = _a
+
+               if a != null then
+                       a.output
+               end
+
+               _a = a
+       end
+
+       fun na: nullable A = _a
+
+       fun run2
+       do
+               var na = na
+               if na != null then
+                       na.output
+                       _a = na
+               end
+
+               #alt1# _a = na
+       end
+end
+
+fun foo
+do
+       var a: Object = 5
+       var o = a
+       if a != null then
+               a.output
+       end
+       o = a
+end
+
+fun rand: Bool do return true
+
+var g = new G[Object](1)
+g.run
+g.run2
+foo