def Parse.read_fixed.go

bend-scanner@0.1.0.0 · parse.bend:142

import Base

142def Parse.read_fixed.go(
143  s: String, n: Nat, +acc: U32, off: Nat, st: Parse.St, +max: U32
144) -> Result<&2, &2, Parse.Error, Parse.Dec>:
145  match s n st:
146    case _ _ StBad{c}:
147      Fail{Unexpected{off, c}}
148    case _ _ StOv{}:
149      Fail{Overflow{off}}
150    case _ 0n StOk{}:
151      Done{Dec{acc, Cur{s, off}}}
152    case SNil{} 1n++p StOk{}:
153      Fail{Eof{off}}
154    case SCon{+h, t} 1n++p StOk{}:
155      Parse.read_fixed.go(
156        t, p, Parse.nacc(acc, h), 1n+off, Parse.st.of(acc, h, max), max
157      )