tests/example_beer.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 # 99 bottles of beer
  18 # Just for fun
  19
  20 class Bottle
  21         meth sing is abstract
  22 private
  23         meth sing_start
  24         do
  25                 printn(self, " of beer on the wall.\n")
  26                 printn(self, " of beer.\n")
  27                 printn("Take it down, pass it around.\n")
  28         end
  29 end
  30
  31 class OneBottle
  32 special Bottle
  33         redef meth sing
  34         do
  35                 sing_start
  36                 printn("No more bottles of appear on the wall!\n\n")
  37         end
  38
  39         redef meth to_s: String
  40         do
  41                 return "One bottle"
  42         end
  43
  44         init do end
  45 end
  46
  47 class TwoBottles
  48 special Bottle
  49         redef meth sing
  50         do
  51                 sing_start
  52                 printn("One bottle appears on the wall\n\n")
  53         end
  54
  55         redef meth to_s: String
  56         do
  57                 return "2 bottles"
  58         end
  59
  60         init do end
  61 end
  62
  63 class Bottles
  64 special Bottle
  65
  66         redef meth sing
  67         do
  68                 sing_start
  69                 printn(_quantity - 1," bottles appear on the wall!\n\n")
  70         end
  71
  72         redef meth to_s: String
  73         do
  74                 return _quantity.to_s + " bottles"
  75         end
  76
  77         init(i: Int)
  78         do
  79                 _quantity = i
  80         end
  81
  82         attr _quantity: Int
  83 end
  84
  85 var i = 99
  86 while i > 2 do
  87         (new Bottles(i)).sing
  88         i = i - 1
  89 end
  90 (new TwoBottles).sing
  91 (new OneBottle).sing
  92