Falcon_Core: /home/gian/Progetti/falcon/core/include/falcon/generatorseq.h Source File

00001 /*
00002    FALCON - The Falcon Programming Language.
00003    FILE: generatorseq.h
00004 
00005    Virtual sequence that can be used to iterate over generators.
00006    -------------------------------------------------------------------
00007    Author: Giancarlo Niccolai
00008    Begin: Sun, 09 Aug 2009 19:04:17 +0200
00009 
00010    -------------------------------------------------------------------
00011    (C) Copyright 2009: the FALCON developers (see list in AUTHORS file)
00012 
00013    See LICENSE file for licensing details.
00014 */
00015 
00016 
00017 #ifndef FALCON_GENERATORSEQ_H
00018 #define FALCON_GENERATORSEQ_H
00019 
00020 #include <falcon/setup.h>
00021 #include <falcon/sequence.h>
00022 #include <falcon/item.h>
00023 
00024 namespace Falcon {
00025 
00026 class FALCON_DYN_CLASS GeneratorSeq: public Sequence
00027 {
00028    VMachine* m_vm;
00029 
00030    Item m_callable;
00031    mutable Item m_cache_cur;
00032    mutable Item m_cache_next;
00033 
00034    mutable bool m_bHasCachedCur;
00035    mutable bool m_bHasCachedNext;
00036    mutable bool m_bComplete;
00037 
00038    bool fillCurrentValue() const;
00039    bool fillNextValue() const;
00040 
00041 public:
00042    GeneratorSeq( VMachine* runEvn, const Item& callable );
00043    GeneratorSeq( const GeneratorSeq& other );
00044 
00045    virtual ~GeneratorSeq();
00046 
00047    virtual const Item &front() const;
00048    virtual const Item &back() const;
00049    virtual void clear();
00050    virtual bool empty() const;
00051    virtual void append( const Item &data );
00052    virtual void prepend( const Item &data );
00053    virtual FalconData* clone() const;
00054    virtual void gcMark( uint32 gen );
00055 
00056    //==============================================================
00057    // Iterator management
00058    //
00059 
00060 protected:
00061    virtual void getIterator( Iterator& tgt, bool tail = false ) const;
00062    virtual void copyIterator( Iterator& tgt, const Iterator& source ) const;
00063    virtual void insert( Iterator &iter, const Item &data );
00064    virtual void erase( Iterator &iter );
00065    virtual bool hasNext( const Iterator &iter ) const;
00066    virtual bool hasPrev( const Iterator &iter ) const;
00067    virtual bool hasCurrent( const Iterator &iter ) const;
00068 
00069    virtual bool next( Iterator &iter ) const;
00070    virtual bool prev( Iterator &iter ) const;
00071 
00072    virtual Item& getCurrent( const Iterator &iter );
00073    virtual Item& getCurrentKey( const Iterator &iter );
00074 
00075    virtual bool equalIterator( const Iterator &first, const Iterator &second ) const;
00076 };
00077 
00078 }
00079 
00080 #endif /* FALCON_GENERATORSEQ_H */
00081 
00082 /* end of generatorseq.h */