`bessel.hpp` and `gamma.hpp` emit MSVC `/analyze` warning C6326: Potential comparison of a constant with another constant.

[StephanTLavavej]

https://godbolt.org/z/jdd9b6ene

#include <boost/math/special_functions/bessel.hpp>

int main() {
    (void) boost::math::cyl_bessel_i(0.0, 0.0);
}

When compiled with MSVC /analyze, this warns:

[...]\include\boost\math\special_functions\bessel.hpp(206) : warning C6326: Potential comparison of a constant with another constant.
[...]\include\boost\math\special_functions\gamma.hpp(258) : warning C6326: Potential comparison of a constant with another constant.

These lines are indeed testing compile-time constants:

math/include/boost/math/special_functions/bessel.hpp

Line 206 in a8f0f0a

if((policies::digits<T, Policy>() <= 113) && (std::numeric_limits<T>::digits <= 113) && (std::numeric_limits<T>::radix == 2))

math/include/boost/math/special_functions/gamma.hpp

Line 258 in a8f0f0a

else if((z >= 3) && (z < 100) && (std::numeric_limits<T>::max_exponent >= 1024))

This warning is merely an annoyance, nothing is wrong with the code, so it should simply be silenced (e.g. with push-disable-pop).