Parse (split) a string in C++ using string delimiter (standard C++)

Question

I am parsing a string in C++ using the following:

using namespace std;

string parsed,input=\"text to be parsed\";
stringstream input_stringstream(input);

i         


        

Answer 1

You can also use regex for this:

std::vector split(const std::string str, const std::string regex_str)
{
    std::regex regexz(regex_str);
    std::vector list(std::sregex_token_iterator(str.begin(), str.end(), regexz, -1),
                                  std::sregex_token_iterator());
    return list;
}

which is equivalent to :

std::vector split(const std::string str, const std::string regex_str)
{
    std::sregex_token_iterator token_iter(str.begin(), str.end(), regexz, -1);
    std::sregex_token_iterator end;
    std::vector list;
    while (token_iter != end)
    {
        list.emplace_back(*token_iter++);
    }
    return list;
}

and use it like this :

#include 
#include 
#include 

std::vector split(const std::string str, const std::string regex_str)
{   // a yet more concise form!
    return { std::sregex_token_iterator(str.begin(), str.end(), std::regex(regex_str), -1), std::sregex_token_iterator() };
}

int main()
{
    std::string input_str = "lets split this";
    std::string regex_str = " "; 
    auto tokens = split(input_str, regex_str);
    for (auto& item: tokens)
    {
        std::cout<

play with it online! http://cpp.sh/9sumb

you can simply use substrings, characters,etc like normal, or use actual regular experssions to do the splitting.
its also concize and C++11!