def esc.one
import bend-net-json@0.3.0.0/json.bend as Jsonimport Base
187# One escape after the backslash.
188def esc.one(t: String) -> Maybe<&2, Esc>:
189 match t:
190 case SNil{}:
191 None{}
192 case SCon{Chr{+e}, +u}:
193 +v = esc.simple(e)
194 Bool.pick(Maybe<&2, Esc>, U32.is_eq(e, 117), esc.u(hex4(u)), Bool.pick(Maybe<&2, Esc>, U32.is_eq(v, 99), None{}, Some{Esc{v, u}}))