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

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## 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
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      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() {}
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      64
      65 inline int SymbolConjunctPtrBag::length()
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      66 {
      67   return count;
      68 }
      69
      70 inline int SymbolConjunctPtrBag::empty()
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      71 {
      72   return count == 0;
      73 }
      74
      75 inline int SymbolConjunctPtrBag::contains(SymbolConjunctPtr  item)
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      76 {
      77   return seek(item) != 0;
      78 }
      79
      80 #endif

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