interpretor/faust-0.9.47mr3/compiler/tlib/occurrences.hh

   1 /************************************************************************
   2  ************************************************************************
   3     FAUST compiler
   4         Copyright (C) 2003-2004 GRAME, Centre National de Creation Musicale
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   7     it under the terms of the GNU General Public License as published by
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   9     (at your option) any later version.
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  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
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  21
  22 #ifndef __OCCURENCES__
  23 #define __OCCURENCES__
  24
  25 #include "tlib.hh"
  26
  27 /**
  28  * Count subtree occurences
  29  * Count the number of occurences of each subtree of a root tree.
  30  */
  31
  32 class Occurrences
  33 {
  34         Tree    fKey;                                   // specific property key
  35
  36  public:
  37         Occurrences(Tree root);                 // count the occurrences of each subtree of root
  38         int getCount(Tree t);                   // return the number of occurrences of t in root
  39
  40  private:
  41         Tree specificKey(Tree root);    // specific key for occurences counting in root
  42         void countOccurrences(Tree t);  // increment the occurrences of t and its subtrees
  43         void setCount(Tree t, int c);   // set the number of occurrences of t
  44 };
  45
  46 #endif