string_view_split.cpp

#include <iostream>
#include <string>
#include <string_view>
#include <vector>

std::vector<std::string_view> split_no_strcpy(std::string_view orig, const char sep) {
  std::vector<std::string_view> result;
  if (orig.size() > 0) {
    size_t from = 0;
    size_t sepIndex = orig.find(sep);
    while (sepIndex != std::string::npos) {
      result.emplace_back(&orig[from], sepIndex - from);
      from = sepIndex + 1;
      sepIndex = orig.find(sep, from);
    }
    result.emplace_back(&orig[from], orig.size() - from);
  }
  return result;
}

int main(int argc, char **argv) {
  std::string hello = u8"Hello World what up?";
  auto splits = split_no_strcpy(hello, ' ');
  for (std::string_view split : splits) {
    std::cout << split << std::endl;
  }
}