title: How to match wchar_t[] with constexpr in a template function?
body: <p>I have a function like :</p>
  <pre><code>template &lt;const char delim = ' ', typename Arg&gt;
  inline std::string jq2StlString(const Arg&amp; arg)
  {
      if constexpr (std::is_same_v&lt;Arg, std::wstring&gt;)
      {
          jqWideChar2StlString(arg);
      }
      else if constexpr (std::is_convertible_v&lt;Arg, const wchar_t*&gt;)
      {
          jqWideChar2StlString(arg);
      }
  ...
  }
  </code></pre>
  <p>how could I match wchar_t array with different size like :</p>
  <pre><code>wchar_t[8]
  wchar_t[3]
  </code></pre>
  <p>so on ?</p>