greenplumn CBitSetIter 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/common/CBitSetIter.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CBitSetIter.h
/
/ @doc:
/ Implementation of iterator for bitset
/---------------------------------------------------------------------------
#ifndef GPOS_CBitSetIter_H
#define GPOS_CBitSetIter_H
#include "gpos/base.h"
#include "gpos/common/CBitSet.h"
namespace gpos
{
/---------------------------------------------------------------------------
/ @class:
/ CBitSetIter
/
/ @doc:
/ Iterator for bitset's; defined as friend, ie can access bitset's
/ internal links
/
/---------------------------------------------------------------------------
class CBitSetIter
{
private:
/ bitset
const CBitSet &m_bs;
/ current cursor position (in current link)
ULONG m_cursor;
/ current cursor link
CBitSet::CBitSetLink *m_bsl;
/ is iterator active or exhausted
BOOL m_active;
public:
CBitSetIter(const CBitSetIter &) = delete;
/ ctor
explicit CBitSetIter(const CBitSet &bs);
/ dtor
~CBitSetIter() = default;
/ short hand for cast
operator BOOL() const
{
return m_active;
}
/ move to next bit
BOOL Advance();
/ current bit
ULONG Bit() const;
}; / class CBitSetIter
} / namespace gpos
#endif / !GPOS_CBitSetIter_H
/ EOF