https://svn.boost.org/trac10/ticket/11667 <p> C:\boost_1_59_0_2013\boost/bind/bind.hpp(305) : error C2664: 'bool (const boost: :python::api::object &amp;,std::string &amp;)' : cannot convert argument 2 from 'const s td::string' to 'std::string &amp;' </p> <blockquote> <p> Conversion loses qualifiers C:\boost_1_59_0_2013\boost/bind/bind.hpp(907) : see reference to functio </p> </blockquote> <p> n template instantiation 'R boost::_bi::list2&lt;boost::_bi::value&lt;T&gt;,boost::arg&lt;1&gt; </p> <blockquote class="citation"> <p> ::operator ()&lt;bool,bool(<span class="underline">cdecl *)(const boost::python::api::object &amp;,std::stri </span></p> </blockquote> <p> ng &amp;),boost::_bi::list1&lt;const std::basic_string&lt;char,std::char_traits&lt;char&gt;,std: :allocator&lt;char&gt;&gt; &amp;&gt;&gt;(boost::_bi::type&lt;bool&gt;,F &amp;,A &amp;,long)' </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/11667 Trac 1.4.3