Function tskit::bindings::tsk_is_unknown_time

pub unsafe extern "C" fn tsk_is_unknown_time(val: f64) -> bool

@brief Check if a number is TSK_UNKNOWN_TIME

@rst Unknown time values in tskit are represented by a particular NaN value. Since NaN values are not equal to each other by definition, a simple comparison like mutation.time == TSK_UNKNOWN_TIME will fail even if the mutation’s time is TSK_UNKNOWN_TIME. This function compares the underlying bit representation of a double value and returns true iff it is equal to the specific NaN value :c:macro:TSK_UNKNOWN_TIME. @endrst

@param val The number to check @return true if the number is TSK_UNKNOWN_TIME else false