title: Finding std::boyer_moore_searcher
body: <p>I'd like to try using the <a href="https://en.cppreference.com/w/cpp/utility/functional/boyer_moore_searcher" rel="nofollow noreferrer">std::boyer_moore_searcher</a> class. But I've run into two questions:</p>
  
  <ol>
  <li>Where is it? I'm using Visual Studio 2019 but it reports <em>"namespace std has no member boyer_moore_searcher"</em>.</li>
  <li>One of the issues with the Boyer Moore algorithm is that the jump table must be very large for Unicode characters. Can anyone tell me how the <code>boyer_moore_searcher</code> class deals with this?</li>
  </ol>