quick and dirty and not safe date parsing function, lacks a input sanitizer

date_parse.c++

#include <string_view>
#include <cstdlib>
#include <ctime>
#include <tuple>
auto str_date = "02/03/88 00:54:56+04";

using namespace std;
auto parse_time(string_view str_date) -> pair<tm, int>{
    auto next_token = [=, token_pos=0](auto delimiter, bool consume_delimiter = true) mutable{
        token_pos = str_date.find(delimiter, token_pos) + consume_delimiter? 1: 0;
        return str_date.substr(token_pos);
    };
    auto day = str_date;
    auto month = next_token('/');
    auto year = next_token('/');
    auto hour = next_token(' ');
    auto minute = next_token(':');
    auto second = next_token(':');
    auto tz = next_token('+', false);


    tm date{};
    date.tm_mday=atoi(data(day));
    date.tm_mon=atoi(data(month)) -1;
    date.tm_year=atoi(data(year));
    date.tm_hour=atoi(data(hour));
    date.tm_min=atoi(data(minute));
    date.tm_sec=atoi(data(second));
    return {date, atoi(data(tz))};
}

int main(){
    return get<int>(parse_time(str_date));
}