"special">;</span>
</pre>
<h6>
<a name="json.ref.boost__json__string.find_first_of.h1"></a>
          <span class="phrase"><a name="json.ref.boost__json__string.find_first_of.description"></a></span><a class="link" href="find_first_of.html#json.ref.boost__json__string.find_first_of.description">Description</a>
        </h6>
<p>
          Returns the index corrosponding to the first occurrence of any of the characters
          of <code class="computeroutput"><span class="identifier">sv</span></code> within 