def step.span.chk
import emerging-ezjson@1.3.0.0/src/parse.bend as Parseimport Base
import emerging-ezjson@1.3.0.0/src/value.bend as V
165def step.span.chk(src: String, +nn: U32) -> (V.Json & Bool):
166 step.span.use(V.span.str(src, nn, U32.is_zero(nn)))