compile: implicit isset for attribute read access

[nit.git] / tests / base_attr_nullable.nit

diff --git a/tests/base_attr_nullable.nit b/tests/base_attr_nullable.nit
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+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2004-2008 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 end
+
+interface Object
+end
+
+universal Int
+       meth output is intern
+       meth +(o: Int): Int is intern
+end
+
+class Integer
+       readable writable attr _val: Int
+       init(val: Int) do _val = val
+       meth output do _val.output
+end
+
+class Foo
+       attr _a1: Integer
+       readable attr _a2: Integer
+       meth run
+       do
+               _a1.output
+               a2.output
+       end
+
+       meth run_other(o: Foo)
+       do
+               o._a1.output
+               o._a2.output
+       end
+
+       init
+       do
+               #alt1#run
+               _a1 = new Integer(1)
+               #alt2#run
+               _a2 = new Integer(_a1.val + 1)
+       end
+
+       init nop do end
+end
+
+class Bar
+special Foo
+       attr _a3: Integer
+       redef meth run
+       do
+               _a1.output
+               _a2.output
+               _a3.output
+       end
+
+       init
+       do
+               nop
+               #alt3#run
+               _a1 = new Integer(10)
+               #alt4#run_other(self)
+               _a2 = new Integer(20)
+               #alt5#run
+               _a3 = new Integer(30)
+       end
+end
+
+var f = new Foo
+var b = new Bar
+f.run
+b.run