greenplumn CEnumSetIter 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/common/CEnumSetIter.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CEnumSetIter.h
/
/ @doc:
/ Implementation of iterator for enum set
/---------------------------------------------------------------------------
#ifndef GPOS_CEnumSetIter_H
#define GPOS_CEnumSetIter_H
#include "gpos/base.h"
#include "gpos/common/CBitSetIter.h"
#include "gpos/common/CEnumSet.h"
namespace gpos
{
/---------------------------------------------------------------------------
/ @class:
/ CEnumSetIter
/
/ @doc:
/ Template derived from CBitSetIter
/
/---------------------------------------------------------------------------
template <class T, ULONG sentinel_index>
class CEnumSetIter : public CBitSetIter
{
private:
public:
CEnumSetIter<T, sentinel_index>(const CEnumSetIter<T, sentinel_index> &) =
delete;
/ ctor
explicit CEnumSetIter<T, sentinel_index>(
const CEnumSet<T, sentinel_index> &enum_set)
: CBitSetIter(enum_set)
{
}
/ dtor
~CEnumSetIter<T, sentinel_index>() = default;
/ current enum
T
TBit() const
{
GPOS_ASSERT(sentinel_index > CBitSetIter::Bit() &&
"Out of range of enum");
return static_cast<T>(CBitSetIter::Bit());
}
}; / class CEnumSetIter
} / namespace gpos
#endif / !GPOS_CEnumSetIter_H
/ EOF