lib-src/contain/basiccol.cc

   1 //////////////////////////////////////////////////////////////////////////////
   2 // NOTICE:
   3 //
   4 // ADLib, Prop and their related set of tools and documentation are in the
   5 // public domain.   The author(s) of this software reserve no copyrights on
   6 // the source code and any code generated using the tools.  You are encouraged
   7 // to use ADLib and Prop to develop software, in both academic and commercial
   8 // settings, and are free to incorporate any part of ADLib and Prop into
   9 // your programs.
  10 //
  11 // Although you are under no obligation to do so, we strongly recommend that
  12 // you give away all software developed using our tools.
  13 //
  14 // We also ask that credit be given to us when ADLib and/or Prop are used in
  15 // your programs, and that this notice be preserved intact in all the source
  16 // code.
  17 //
  18 // This software is still under development and we welcome any suggestions
  19 // and help from the users.
  20 //
  21 // Allen Leung
  22 // 1994
  23 //////////////////////////////////////////////////////////////////////////////
  24
  25 #include <stdlib.h>
  26 #include <iostream.h>
  27 #include <AD/contain/basiccol.h>
  28
  29 //////////////////////////////////////////////////////////////////////////
  30 //  Default implementation of size() iterates through the collection
  31 //  and count the number of elements.
  32 //  Subclasses of Collection should override this inefficient(but correct)
  33 //  implementation if possible.
  34 //////////////////////////////////////////////////////////////////////////
  35 int BasicCollection::size() const
  36 {  int count;
  37    Ix  i;
  38    for (count = 0, i = first(); i; i = next(i)) count++;
  39    return count;
  40 }
  41
  42 //////////////////////////////////////////////////////////////////////////
  43 //  The following methods are used by subclasses to report errors
  44 //////////////////////////////////////////////////////////////////////////
  45 void BasicCollection::should_not_implement(const char method_name[]) const
  46 {  cerr << "\n[Class " << myName()
  47         << " does not understand method " << method_name << "]\n";
  48    exit(1);
  49 }