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2問題:
1.我真的需要通過成員傳遞參數來修改/ modify_key嗎?
2.爲什麼我有這樣的編譯錯誤
multi_index模板編譯錯誤
要查看與錯誤的整個代碼,你可以看看http://coliru.stacked-crooked.com/a/d6241361318e1925
誤差
MultiIndex4.h: In member function 'uint32_t CrMultiParameterMultiIndex::ModifyKeyBy(SearchingKey&, ModifyKeyType&) [with SearchingTagType = IMEI_tag, ModifyingTagType = IMEI_tag, SearchingKey = uint32_t, ModifyKeyType = uint32_t]':
MultiIndex4.h:183: instantiated from here
MultiIndex4.h:119: error: no matching function for call to 'boost::multi_index::multi_index_container<UsersKey, UsersKey_indices, std::allocator<UsersKey> >::modify_key(boost::multi_index::detail::bidir_node_iterator<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<UsersKey, std::allocator<UsersKey> > > >&, boost::function<void()(uint32_t&)>&)'
*** Errors occurred during this build ***
我有一個類CrMultiParameterMultiIndex那擁有2個索引的多索引。
我試着創建一個模板函數,它只能根據關鍵字的一部分進行搜索並只修改關鍵字的一部分。
這個類有一個輔助函數,使用它
template <typename TagType,typename SearchingKey>
typename GlobalHash::index<TagType>::type::iterator GetIteratorBy(SearchingKey & key){
return m_pGlobalHash->get<TagType>().find(key) ;
}
,修改功能
template <typename SearchingTagType,typename ModifyingTagType,typename SearchingKey,typename ModifyKeyType> uint32_t ModifyKeyBy(SearchingKey & key,ModifyKeyType & pi_Modifykey)
{
uint32_t hRes = 1;
//search for entry by TagType
typedef typename GlobalHash::index<SearchingTagType>::type IndexType;
typename IndexType::iterator it = GetIteratorBy<SearchingTagType>(key);
//entry found
if(it != m_pGlobalHash->get<SearchingTagType>().end())
{
//Set parameter to modify
hRes = SetParameterKeys<ModifyingTagType>(pi_Modifykey);
if(hRes == 1)
{
//get iteraror to modify
typedef typename GlobalHash::index<ModifyingTagType>::type ModifyIndexType;
typename ModifyIndexType::iterator itToModify = m_pGlobalHash->get<ModifyingTagType>().iterator_to(*it);
boost::function<void(ModifyKeyType &)> f = boost::bind(&CrMultiParameterMultiIndex::ModifyKey<ModifyingTagType, ModifyKeyType >, this, _1);
//modify key failed
if(m_pGlobalHash->modify_key(itToModify , f)==false)
hRes = 0;
}
}
//entry not found
else
hRes = 0;
return hRes;
}
這個編譯
uint64_t nFromImsi = 1;
uint64_t nToImsi = 1;
m_multiParam.ModifyKeyBy<IMSI_tag,IMSI_tag>(nFromImsi,nToImsi)
但不是這個
uint32_t nFromImsi = 1;
uint32_t nToImsi = 1;
m_multiParam.ModifyKeyBy<IMEI_tag,IMEI_tag>(nFromImsi,nToImsi)
爲什麼?以及它如何可以編譯
,這裏是修飾語
template <> inline void CrMultiParameterMultiIndex::ModifyKey<IMEI_tag>(uint32_t & po_Key){po_Key = m_ParameterKeys.IMEI;}
template <> inline void CrMultiParameterMultiIndex::ModifyKey<IMSI_tag>(uint64_t & po_Key){po_Key = m_ParameterKeys.IMSI;}
感謝您的回答。我真的需要通過成員傳遞參數來修改/ modify_key嗎? – davidbobo
[coliru](http://coliru.stacked-crooked.com/a/4586d3c48d1b4a55) –
對不起,我不理解你關於傳遞參數「通過成員」的問題,謹慎詳細說明? –