<code class="computeroutput"><span class="special">{</span><span class="identifier">begin</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">pos</span><span class="special">,</span> <span class="identifier">end</span><span class="special">())</span></code> if it exists, and <a class="link" href="npos.html" title="string::npos"><code class="computeroutput"><span class="identifier">npos</span></code></a> otherwise.
        </p>
<h6>
<a name="json.ref.boost__json__str