message: samples: replace regex
  GCC 4.8.5 doesn't support regex
diff: #include <iostream>
  #include <fstream>
  -#include <regex>
  #include <opencv2/imgproc.hpp>
  #include <opencv2/highgui.hpp>
  @@ -24,6 +23,21 @@ std::string keys =
  "{ evalDataPath edp | | Path to benchmarks for evaluation. "
  "Download links are provided in doc/tutorials/dnn/dnn_text_spotting/dnn_text_spotting.markdown}";
  +static
  +void split(const std::string& s, char delimiter, std::vector<std::string>& elems)
  +{
  + elems.clear();
  + size_t prev_pos = 0;
  + size_t pos = 0;
  + while ((pos = s.find(delimiter, prev_pos)) != std::string::npos)
  + {
  + elems.emplace_back(s.substr(prev_pos, pos - prev_pos));
  + prev_pos = pos + 1;
  + }
  + if (prev_pos < s.size())
  + elems.emplace_back(s.substr(prev_pos, s.size() - prev_pos));
  +}
  +
  int main(int argc, char** argv)
  {
  // Parse arguments
  @@ -114,9 +128,9 @@ int main(int argc, char** argv)
  }
  gtLine = gtLine.substr(0, splitLoc);
  - std::regex delimiter(",");
  - std::vector<String> v(std::sregex_token_iterator(gtLine.begin(), gtLine.end(), delimiter, -1),
  - std::sregex_token_iterator());
  + std::vector<std::string> v;
  + split(gtLine, ',', v);
  +
  std::vector<int> loc;
  std::vector<Point> pts;
  for (auto && s : v) {
  