def before.dot
import yaml-for-bend@0.1.1.0/yaml11.bend as Yaml11import Base
145def before.dot(s: String) -> String:
146 match s:
147 case SNil{}:
148 ""
149 case SCon{c, t}:
150 match c:
151 case '.':
152 ""
153 case _:
154 SCon{c, before.dot(t)}