Hi, I recently had a need to investigate money classes. I searched for such a beast, since I was sure I wasn't the first to have a need for this, but it was only after I had coded up a good chunk of my own implementation that I came across a boost mailing list thread involving Martin <adrianm@...> and Daniel Frey: http://lists.boost.org/MailArchives/boost/msg77625.php Martin gives a link to his decimal classes here: http://web.telia.com/~u84606172/Boost/ In boostdecimal.zip's boost/decimal/money.hpp, I find the following code: ---- snip ------------------------------------------------------- # define BOOST_MONEY_OPERATOR(op, type) \ template <class DecimalT> \ inline money_base<DecimalT> operator##op(money_base<DecimalT> l, type r) { return l op= r; } \ template <class DecimalT> \ inline money_base<DecimalT> operator##op(type l, money_base<DecimalT> r) { return r op= l; } BOOST_MONEY_OPERATOR(+, int) BOOST_MONEY_OPERATOR(-, int) BOOST_MONEY_OPERATOR(*, int) BOOST_MONEY_OPERATOR(/, int) ---- snip ------------------------------------------------------- As far as I can see, the second item in the BOOST_MONEY_OPERATOR macro is incorrect. Consider: money m = 2; 5 - money(2); This would result in: money(2) -= 5; I'm happy to see some interest in money classes on the boost lists. Is this project still being pursued? Thanks, - Chris