Reverse string in "canonical" C++

reverse_string.cpp

/*
 * Reverse string in "canonical" C++
 *
 * Why did I make this a gist?  Because I've seen so
 * many cumbersome ways of doing this in C++, including
 * using <algorithm> and std::reverse, using loops and
 * so on.  Yeah, those work too, and loops are fine for
 * C, but in C++, you should simply just use the iterators
 * and standard constructors that std::string gives you.
 *
 * Source: Christian Stigen Larsen
 * http://csl.sublevel3.org
 */
#include <iostream>
#include <string>

/*
 * Reverse a std::string in C++.
 * No need for <algorithm> or c_str()-wrangling.
 *
 */
std::string reverse(const std::string& s)
{
  return std::string(s.rbegin(), s.rend());
}

int main()
{
  // Outputs "!dlrow ,olleH"
  std::cout << reverse("Hello, world!") << std::endl;
  return 0;
}

If you do want to do it in place, though, you could do:

#include <algorithm>

void reverse_inplace(std::string& s)
{
  std::reverse(s.begin(), s.end());
}