boost::math::isfinite returns false for unsigned int 0

[Bob Carpenter <carp@…>]

from: boost/math/distributions/detail/common_error_handling.hpp

(boost::math::isfinite)(0U) returns 0

(boost::math::isfinite)(1U) returns 1

To recreate the problem, the following program:

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#include <iostream> #include <boost/math/distributions/detail/common_error_handling.hpp> int main(int argc, char* argv[]) {

std::cout << "isfinite(0U)=" << (boost::math::isfinite)(0U) << std::endl; std::cout << "isfinite(1U)=" << (boost::math::isfinite)(0U) << std::endl;

}

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prints:

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isfinite(0U)=0 isfinite(1U)=0

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This can't happen with the std::isinf() tests because they only take floating point args, so the unsigned int would get cast.

[John Maddock]

(In [79438]) Allow fpclassify and friends to be used with integer types via the usual promotion mechanism. Fixes #6517.