/pre>
This macro is defined in <a target="pfto" href="../../../boost/serialization/pfto.hpp">&lt;boost/serialization/pfto.hpp&gt;</a>.
For more information about this topic, check the source.

<h4>Dereferencing</h4>
Dereferencing some iterators can cause problems.  For example, a natural
way to write a <code style="white-space: normal">remove_whitespace</code> iterator is to increment past the initial 
whitespaces when the iterator is constructed.  This will fail if the iterator passed to the
constructor "p