modules/up/src/gnug++/SymbolConjunctPtr.Bag.h

/* [<][>]
[^][v][top][bottom][index][help] */

FUNCTIONS

This source file includes following functions.
  1. SymbolConjunctPtrBag
  2. SymbolConjunctPtrBag
  3. length
  4. empty
  5. contains

   1 // This may look like C code, but it is really -*- C++ -*-
   2 /* 
   3 Copyright (C) 1988 Free Software Foundation
   4     written by Doug Lea (dl@rocky.oswego.edu)
   5 
   6 This file is part of the GNU C++ Library.  This library is free
   7 software; you can redistribute it and/or modify it under the terms of
   8 the GNU Library General Public License as published by the Free
   9 Software Foundation; either version 2 of the License, or (at your
  10 option) any later version.  This library is distributed in the hope
  11 that it will be useful, but WITHOUT ANY WARRANTY; without even the
  12 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  13 PURPOSE.  See the GNU Library General Public License for more details.
  14 You should have received a copy of the GNU Library General Public
  15 License along with this library; if not, write to the Free Software
  16 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18 
  19 
  20 #ifndef _SymbolConjunctPtrBag_h
  21 #ifdef __GNUG__
  22 #pragma interface
  23 #endif
  24 #define _SymbolConjunctPtrBag_h 1
  25 
  26 #include "config.h"
  27 #include "Pix.h"
  28 #include "SymbolConjunctPtr.defs.h"
  29 
  30 class SymbolConjunctPtrBag
     /* [<][>][^][v][top][bottom][index][help] */
  31 {
  32 protected:
  33   int                   count;
  34 
  35 public:
  36   virtual              ~SymbolConjunctPtrBag();
  37 
  38   int                   length();                // current number of items
  39   int                   empty();
  40 
  41   virtual Pix           add(SymbolConjunctPtr  item) = 0;      // add item; return Pix
  42 
  43   virtual void          del(SymbolConjunctPtr  item) = 0;      // delete 1 occurrence of item
  44 #undef remove
  45   virtual void          remove(SymbolConjunctPtr  item);       // delete all occurrences
  46   virtual void          clear();                 // delete all items
  47 
  48   virtual int           contains(SymbolConjunctPtr  item);     // is item in Bag?
  49   virtual int           nof(SymbolConjunctPtr  item);          // how many in Bag?
  50 
  51   virtual Pix           first() = 0;             // Pix of first item or 0
  52   virtual void          next(Pix& i) = 0;        // advance to next or 0
  53 
  54   virtual SymbolConjunctPtr&          operator () (Pix i) = 0; // access item at i
  55 
  56   virtual Pix           seek(SymbolConjunctPtr  item, Pix from=0); // Pix of next occurrence
  57   virtual int           owns(Pix i);             // is i a valid Pix  ?
  58 
  59   void                  error(const char* msg);
  60   virtual int           OK() = 0;                // rep invariant
  61 };
  62 
  63 inline SymbolConjunctPtrBag::~SymbolConjunctPtrBag() {}
     /* [<][>][^][v][top][bottom][index][help] */
  64 
  65 inline int SymbolConjunctPtrBag::length()
     /* [<][>][^][v][top][bottom][index][help] */
  66 {
  67   return count;
  68 }
  69 
  70 inline int SymbolConjunctPtrBag::empty()
     /* [<][>][^][v][top][bottom][index][help] */
  71 {
  72   return count == 0;
  73 }
  74 
  75 inline int SymbolConjunctPtrBag::contains(SymbolConjunctPtr  item)
     /* [<][>][^][v][top][bottom][index][help] */
  76 {
  77   return seek(item) != 0;
  78 }
  79  
  80 #endif

/* [<][>][^][v][top][bottom][index][help] */