"><em>s</em></span>
                    using the <a class="link" href="../match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a> <span class="emphasis"><em>flags</em></span>.
                    For each match pushes the starting index of what matched onto
                    <span class="emphasis"><em>v</em></span>. Returns the number of matches found.
                  </p>
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