Distinguishes if the floating point number has the ability to be denormalized.
static const float_denorm_style has_denorm = denorm_absent;
The static variable has_denorm equals denorm_present if the type allows denormalized values. The variable has_denorm equals denorm_absent if the type does not allow denormalized values. The variable has_denorm equals denorm_indeterminate if the type is indeterminate for denormalized values.