Multipart.enc.part: def of bend-kit-multipart@0.3.0.0
Import: import bend-kit-multipart@0.3.0.0/multipart.bend as Multipart
Lines 259-267 of bend-kit-multipart@0.3.0.0/multipart.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&start_line=259&end_line=267

import Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes

# The pieces so far, latest first. A body cannot hold CRLF "--" boundary; bchars hold no CR,
# so the delimiter cannot start inside the body and end in the one after it.
def enc.part(acc: Result<&1, &1, String, List<&1, Bytes.Bytes>>, p: Part, +b: String, +delim: String) -> Result<&1, &1, String, List<&1, Bytes.Bytes>>:
  match acc:
    case Fail{e}:
      Fail{e}
    case Done{xs}:
      Part{name, fname, +ct, body} = p
      enc.body(enc.ctype.ok(ct), Bytes.find(body, delim), enc.head(b, name, fname, ct), xs)

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=find
  https://jend.leeeet.dev/definition.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&name=Part
  https://jend.leeeet.dev/definition.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&name=enc.body
  https://jend.leeeet.dev/definition.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&name=enc.ctype.ok
  https://jend.leeeet.dev/definition.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&name=enc.head