func readAddRewriter(s *toki.Scanner, table *tbl.Table) error {
var t *toki.Result
if t = s.Next(); t.Token != word {
return errFmtAddRewriter
}
old := t.Value
if t = s.Next(); t.Token != word {
return errFmtAddRewriter
}
new := t.Value
// token can be a word if it's a negative number. we should probably not have a separate number token, since numbers could be in so many formats
// and we try out Atoi (or whatever fits) anyway.
if t = s.Next(); t.Token != num && t.Token != word {
return errFmtAddRewriter
}
max, err := strconv.Atoi(strings.TrimSpace(string(t.Value)))
if err != nil {
return errFmtAddRewriter
}
rw, err := rewriter.NewFromByte(old, new, max)
if err != nil {
return err
}
table.AddRewriter(rw)
return nil
}
