Re: [Boost-users] isnan stopped working

* Thijs Koerselman [2009-01-04 23:11]:

isnan() and family seems to have stopped working in my code. The only thing I can remember is updating from 1.36 to 1.37. Any idea why the following wouldn't work?

float nan = FP_NAN;

That's just 3. Use std::numeric_limits<float>::quiet_NaN() from <limits>. See the example below that works for me on Linux with Boost 1.36 and g++ 4.3.2.

int ret = 0xdeadbeef; ret = (boost::math::isnan)(nan);

isnan never returns anything.

Well, in my tests on Linux that is set to 0 in your example. Regards, Bernhard #include <iostream> #include <limits> #include int main(int argc, char *argv[]) { float nan = std::numeric_limits<float>::quiet_NaN(); int ret = 0xdeadbeef; ret = (boost::math::isnan)(nan); std::cout << ret << std::endl; return 0; }