rtible to types such as int, unsigned int, etc. 
so that they have default implementations.  This is illustrated by
<a href="../../../boost/archive/basic_text_iarchive.hpp" target="basic_text_iarchive_hpp"><code style="white-space: normal">basic_text_iarchive.hpp</code></a>.
which relies upon the default.  However, in some cases, overrides will have to be
explicitly provided for these types. For an example see
<a href="../../../boost/archive/basic_xml_iarchive.hpp" target="basic_xml_iarchive_hpp"><code styl