>

<SPAN CLASS='keyword'>namespace</SPAN> boost { <SPAN CLASS='keyword'>namespace</SPAN> iostreams { <SPAN CLASS='keyword'>namespace</SPAN> example {

<SPAN CLASS="keyword">class</SPAN> shell_comments_input_filter : <SPAN CLASS="keyword"><SPAN CLASS="keyword"><SPAN CLASS="keyword">public</SPAN></SPAN></SPAN> dual_use_filter {
<SPAN CLASS="keyword">public</SPAN>:
    <SPAN CLASS="keyword">explicit</SPAN> shell_comments_input_filter(<SPAN CLASS="keyword">char</SPAN> comment_char = <SPAN CLASS="literal">'#'</S