def parse_atom_z

bend-prot@0.1.0.0 · pdb.bend:246

import Base
import bend-prot@0.1.0.0/geom.bend as G
import bend-prot@0.1.0.0/protein.bend as P

246# One ATOM line -> (chain, seq, atom). None{} when any field fails.
247# Threaded bottom-up: each helper matches one Maybe and passes the rest on.
248def parse_atom_z(serial: U32, ch: U32, seq: Nat, x: F32, y: F32, mz: Maybe<&2, F32>, elem_s: String, name_s: String) -> Maybe<&1, U32 & Nat & P.Atom>:
249  match mz:
250    case None{}:
251      None{}
252    case Some{z}:
253      Some{(ch, seq, P.Atom{serial, elem_of(elem_s, name_s), G.V3{x, y, z}})}