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// Copyright (C) 1997 The New York Group Theory Cooperative
// See magnus/doc/COPYRIGHT for the full notice.
// Contents:
//
// Principal Author: Alexei Myasnikov
//
// Status: in progress
//
// Revision History:
//
#ifndef _SMLIST_ITERATOR_H_
#define _SMLIST_ITERATOR_H_
#include "SMList.h"
#include "Word.h"
#include "SMEnumerator.h"
//-------------------------- SMListIterator -----------------------------//
template <class T> class SMListIterator {
public:
SMListIterator(const SMList<T>& );
~SMListIterator() {
theData.closeCurrentMode();
if ( currentData )
delete currentData;
}
// Iteration procedures
bool EOL() const { return eol_reached; }
void reset();
bool nextCell();
const T& getData();
int getNumberOfElements()const { return theData.numberOfElements(); }
private:
void deleteCurrentData();
void parseData();
// Parser of an element from the list.
// Unique for each type T.
Chars currentLine;
T* currentData;
// value of the current element from the list
FPGroup theGroup;
// group
int numberOfCurrent;
// number of the last parsed element( which is the currentData)
SMListData theData;
bool eol_reached;
};
// Classes below define standards for element presentation in
// enumerators and lists.
// ---------------- WriteEnumeratorElement --------------------- //
class WriteEnumeratorElement
{
public:
WriteEnumeratorElement() {}
//@njz: moved from private
WriteEnumeratorElement(const WriteEnumeratorElement&);
//
virtual void print(ostream& ostr) const = 0;
inline friend ostream& operator << ( ostream& o,
const WriteEnumeratorElement& we ) {
// o << we.position << ":" << "$D" << " " ;
we.print( o );
return o;
}
protected:
private:
//@njz: moved to be public
// WriteEnumeratorElement(const WriteEnumeratorElement&);
//
};
// ------------------------ EnumWriteWord --------------------- //
class EnumWriteWord : public WriteEnumeratorElement
{
public:
EnumWriteWord( const Word& w, const FPGroup& g)
: theW( w ), theG( g ) { }
void print( ostream& o ) const;
private:
Word theW;
FPGroup theG;
};
// ------------------------ EnumWriteMap --------------------- //
class EnumWriteMap : public WriteEnumeratorElement
{
public:
EnumWriteMap( const Map& m )
: theM( m ) { }
void print( ostream& o ) const;
private:
Map theM;
};
// ------------------------ EnumWriteVectorOfWords --------------------- //
class EnumWriteVectorOfWords : public WriteEnumeratorElement
{
public:
EnumWriteVectorOfWords( const VectorOf<Word>& v, const FPGroup& g )
: theV( v ),
theG( g )
{ }
void print( ostream& o ) const;
private:
VectorOf<Word> theV;
FPGroup theG;
};
// ------------------------ EnumWriteSetOfWords --------------------- //
class EnumWriteSetOfWords : public WriteEnumeratorElement
{
public:
EnumWriteSetOfWords( const SetOf<Word>& s, const FPGroup& g )
: theS( s ),
theG( g )
{ }
void print( ostream& o ) const;
private:
SetOf<Word> theS;
FPGroup theG;
};
// ------------------------ EnumWriteChars --------------------- //
class EnumWriteChars : public WriteEnumeratorElement
{
public:
EnumWriteChars( const Chars& c )
: theC( c )
{ }
void print( ostream& o ) const;
private:
Chars theC;
};
#endif
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