golang中怎么删除map中所有元素

std::map<LONG,CBlinkPCHandle*>::iterator it;for( it = m_mapUserLoginGUID.begin(); it != m_mapUserLoginGUID.end(); it ++){if(it->second != NULL){it->second->RemoveAll();delete it->second;}m_mapUserLoginGUID.erase(it);}调用RemoveAll()删除所有元素