Re: [Boost-users] max value by the number of bits

Christian Henning wrote:

...

boost::int_max_value_t<V>

http://www.boost.org/doc/libs/1_53_0/libs/integer/doc/html/boost_integer/int...

Robert, are you sure I can get the max value of a 15bit value using int_max_value_t?

whoops - I totally misread your question, I was thinking you wanted the TYPE which would hold a max value corresponding to 15 bits. It turns out that I've been working in this area recently. I would suggest skipping the mpl layer and using BOOST_STATIC_CONSTANT directly. The reason is that mpl includes some operations like next which might not work for 2^64 etc. template <int K> struct unsigned_integral_max_value struct { BOOST_STATIC_CONSTANT( boost::uintmax_t, value = ((boost::uintmax_t)1 << K)-1); }; Robert Ramey