ln

import tanya.math;

assert(isNaN(ln(-7.389f)));
assert(isNaN(ln(-7.389)));
assert(isNaN(ln(-7.389L)));

assert(isInfinity(ln(0.0f)));
assert(isInfinity(ln(0.0)));
assert(isInfinity(ln(0.0L)));

assert(ln(1.0f) == 0.0f);
assert(ln(1.0) == 0.0);
assert(ln(1.0L) == 0.0L);