Screenshot WithoutAuto.png does not use the auto keyword: the pair is well
detected and contextual help (F1) is suggested. Screenshot WithAuto.png shows that the type is not detected and that contextual help is thus not available.
Screenshot Auto-complete.png shows that the type have the same issue in the auto-complete menu.

void example(){
    std::map<std::size_t,std::string>map;

    for(const auto&pair:map){
        std::string s=pair.second;
    }

    for(const std::pair<std::size_t,std::string>&pair:map){
        std::string s=pair.second;
    }
}