Boost C++ Libraries: Ticket #13107: Include guards missing in range/iterator_range_hash.hpp https://svn.boost.org/trac10/ticket/13107 <p> Header <code>range/iterator_range_hash.hpp</code> has no include guard; including the header twice in the same translation unit results in an error about duplicate definition of the function template <code>::boost::hash_value(const iterator_range&lt;T&gt;&amp;)</code> </p> en-us Boost C++ Libraries /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/13107 Trac 1.4.3