On Wednesday, February 28th, 2024 at 9:21 AM, Helmut Zeisel via Boost-users wrote:

I tried to use boost muiltiprecision with Visual Studio 2022, 64 bit and got the following error message:

boost\multiprecision\tommath.hpp(444,36): error C2664: 'mp_err mp_radix_size(const mp_int *,int,size_t *)': cannot convert argument 3 from 'int *' to 'size_t *'

I used tommath.h from

https://github.com/libtom/libtommath/blob/develop/tommath.h

that has (line 583)

mp_err mp_radix_size(const mp_int *a, int radix, size_t size) MP_WUR;

but boost\multiprecision\tommath.hpp, lineS 443/444 are

int s; detail::check_tommath_result(mp_radix_size(const_cast< ::mp_int>(&m_data), base, &s));

I compared with cygwin, there tommath.h is

mp_err mp_radix_size(const mp_int *a, int radix, int *size) MP_WUR;

So I am not sure: do I need some different tommath for Visual Studio 2022, 64 bit, or should boost\multiprecision\tommath.hpp be changed?

Helmut _______________________________________________

Helmut, I opened your issue against the library here: https://github.com/boostorg/multiprecision/issues/602. I have Tommath v1.2.1 installed on my system (MacOS ARM64) which has: mp_err mp_radix_size(const mp_int *a, int radix, int *size) MP_WUR; Maybe a new change on develop? If you have a minimal reproducer for your issue that would help as well. Thanks. Matt