I'd like to join this question. I've got the same strange behavior when using boost::hash, like this: std::size_t hash_value(const Command &cmd) { return boost::hash<std::size_t>()(cmd.id()); // id() returns std::sze_t } And I guess, the problem is not in a possible redefinition of size_t - since everywhere in code the std::size_t is fully qualified... 2008/7/14, Matthew Bourdua <unknownmat@gmail.com>:

Hello,

I'm receiving a compiler warning (MSVC8.0) that does not make sense to me, and I wonder if this might be a boost related issue:

#include <vector> #include <functional> #include <boost/function.hpp>

int main() { std::vector< std::size_t > sizes; std::vector< unsigned > data; boost::function< bool (unsigned, unsigned) > fn = std::greater< unsigned

...

(); fn( data.front(), 10 ); // NOTE: data is empty - will cause runtime error }

The warning I get is: warning C4267: 'argument' : conversion from 'size_t' to 'unsigned int', possible loss of data referring to the last line in main().

This warning goes away if I do either of the following: - Comment out the std::vector< std::size_t > sizes - this one baffles me. - Use a 'naked' std::greater< unsigned >() instead of a boost::function< bool (unsigned, unsigned) >() object.

I wonder if size_t is somehow redefined in boost in a way that might be causing me some trouble?

Any help would be appreciated, thanks.

Matt _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users