multiprecision/mpfi typo

[Michael Burr <burr2@…>]

The version of boost that I'm using is through macports. I believe that there is a typo in multiprecision/mpfi.hpp. On line 478, digits2_2_10 should be replaced by digits10_2_2.

The original code is

void precision(unsigned digits10) BOOST_NOEXCEPT {

mpfi_set_prec(this->m_data, multiprecision::detail::digits2_2_10((digits10)));

}

The corrected code should be

void precision(unsigned digits10) BOOST_NOEXCEPT {

mpfi_set_prec(this->m_data, multiprecision::detail::digits10_2_2((digits10)));

}

This change means that with and without an argument, precision reverses the digits operation. Moreover, this matches the corresponding lines in mpfr.hpp.

[John Maddock]

Yep, that's been fixed in develop already and is scheduled for the next release.