tests/test_isa.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2004-2008 Jean Privat <jean@pryen.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 var a : Object
  18 print("int:")
  19 a = 5
  20 print(a isa Int)
  21 print(not a isa String)
  22 print(not a isa AbstractArray[Char])
  23 print(not a isa Iterator[Int])
  24 print(a isa Discrete)
  25 print(a isa Object)
  26
  27 print("string:")
  28 a = "Bonjour"
  29 print(not a isa Int)
  30 print(a isa String)
  31 print(a isa AbstractArray[Char])
  32 print(not a isa Iterator[Int])
  33 print(not a isa Discrete)
  34 print(a isa Object)
  35
  36 print("null:")
  37 a = null
  38 print(a isa Int)
  39 print(a isa String)
  40 print(a isa AbstractArray[Char])
  41 print(a isa Iterator[Int])
  42 print(a isa Discrete)
  43 print(a isa Object)