title: Is "std::is_callable" replaced with "std::is_invocable" in C++17?
body: <p><a href="http://en.cppreference.com/w/cpp/types/is_callable" rel="noreferrer">cppref</a> has removed the entry page for <code>std::is_callable</code>, and use <code>std::is_invocable</code> entry page instead.</p>
  
  <p>However, <code>std::is_callable</code> is still available in Visual Studio 2017.</p>
  
  <p>Is <code>std::is_callable</code> formally [<strong>replaced|deprecated|removed</strong>] with <code>std::is_invocable</code> in C++17?</p>