line
Answer the tuple of line number deltas for this ram function. Each entry encodes a signed offset in an unsigned entry. There's an entry for each nybblecode (not for each nybble). The encoding uses the absolute value of the delta from the previous instruction's line number, shifted left once, adding one for negatives. This allows nybble tuples and byte tuples to be the usual representations for small functions.
Return
The function type associated with this function implementation.