Hi everybody,<br><br>I&#39;m trying the program_options library, <br><br>I&#39;d like to create my own options groups, but when i compile (using -lboost_program_options) option_groups.cpp from the example directory, i&#39;m told that&nbsp; &quot;implicit()&quot; method from the typed_value class doesn&#39;t exist. Btw it doesn&#39;t appear in 
<a href="http://www.boost.org/doc/html/typed_value.html">http://www.boost.org/doc/html/typed_value.html</a><br><br>What is &quot;implicit()&quot; supposed to do, is it different from &quot;default_value()&quot; ? How can i solve this problem ?
<br><br>Here is the error message:<br>option_groups.cpp: In function 'int main(int, char**)':<br>option_groups.cpp:42: error: 'class boost::program_options::typed_value&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, char&gt;' has no member named 'implicit'
<br><br>Regards<br clear="all"><br>-- <br>Romuald THION<br>Doctorant level 3.0<br>&quot;la vie, c&#39;est comme un jeu mal foutu dont on ne connait pas les règles et où il n&#39;y a pas de sauvegardes&quot;