tests/test_ffi_c_fibonacci.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2011-2013 Alexis Laferrière <alexis.laf@xymus.net>
   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 class FibonacciEngine
  18         fun fibonacci( n : Int ) : Int  import fibonacci `{
  19                 if ( n == 0 )
  20                     return 0;
  21                 if ( n == 1 )
  22                     return 1;
  23                 else
  24                     return FibonacciEngine_fibonacci( self, n-1 ) + FibonacciEngine_fibonacci( self,  n-2 );
  25         `}
  26 end
  27
  28 redef class Int
  29         fun fibonacci : Int import fibonacci `{
  30                 if ( self == 0 )
  31                     return 0;
  32                 else if ( self == 1 )
  33                     return 1;
  34                 else
  35                     return Int_fibonacci( self-1 ) + Int_fibonacci( self-2 );
  36         `}
  37 end
  38
  39 var engine = new FibonacciEngine
  40 print engine.fibonacci( 0 )
  41 print engine.fibonacci( 1 )
  42 print engine.fibonacci( 5 )
  43 print engine.fibonacci( 12 )
  44 # print engine.fibonacci( 123 )
  45
  46 print 0.fibonacci
  47 print 1.fibonacci
  48 print 5.fibonacci
  49 print 12.fibonacci
  50 # print 123.fibonacci