foreach.cpp11.adoc

foreach loop

void print(const std::vector<std::string>& vec){
  for(std::vector<std::string>::const_iterator it = vec.cbegin(); it != vec.cend(); ++it){
    std::cout << *it << '\n';
  }

vs

void print(const std::vector<std::string>& vec){
  for(const std::string& v : vec){
    std::cout << v << '\n';
  }
}

foreach loop and auto

void print(const std::map<int, std::string>& m){
  for(const std::pair<int, std::string>& v : m){
    std::cout << v.second << '\n';
  }
}

vs

void print(const std::map<int, std::string>& m){
  for(const auto& v : m){
    std::cout << v.second << '\n';
  }
}

Who can spot the bug?

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