c++istream-iterator

getline vs istream_iterator

Should there be a reason to preffer either getline or istream_iterator if you are doing line by line input from a file(reading the line into a string, for tokenization).

Solution

  • I sometimes (depending on the situation) write a line class so I can use istream_iterator:

    #include <string>
#include <vector>
#include <iterator>
#include <iostream>
#include <algorithm>

struct Line
{
    std::string lineData;

    operator std::string() const
    {
        return lineData;
    }
};
std::istream& operator>>(std::istream& str,Line& data)
{
    std::getline(str,data.lineData);
    return str;
}

int main()
{
     std::vector<std::string>    lines(std::istream_iterator<Line>(std::cin),
                                       std::istream_iterator<Line>());
}