Function fpclassify

Classify floating point value. \param arg number to classify \retval FP_ZERO for positive and negative zero \retval FP_SUBNORMAL for subnormal numbers \retval FP_INFINITY for positive and negative infinity \retval FP_NAN for NaNs \retval FP_NORMAL for all other (normal) values template typename enable ::type fpclassify(T arg) { return functions::fpclassify(arg); }