Compose.attach: def of yaml-for-bend@0.1.1.0
Import: import yaml-for-bend@0.1.1.0/compose.bend as Compose
Lines 333-345 of yaml-for-bend@0.1.1.0/compose.bend: https://jend.leeeet.dev/read.txt?path=yaml-for-bend@0.1.1.0/compose.bend&start_line=333&end_line=345

import Base

# A finished node goes to the collection it's in, or is the document.
def attach(co: Co, item: Item) -> Co:
  match co:
    case Co{stack, anchors, count, root, docs, opened, depth, copied}:
      match stack:
        case Nil{}:
          Co{[], anchors, count, Some{item.val(item)}, docs, opened, depth, copied}
        case Con{top, rest}:
          match top:
            case OSeq{anchor, tag, items, start, at}:
              Co{OSeq{anchor, tag, item.val(item) <> items, start, at} <> rest, anchors, count, root, docs, opened, depth, copied}
            case OMap{anchor, tag, items, start, at}:
              Co{OMap{anchor, tag, item <> items, start, at} <> rest, anchors, count, root, docs, opened, depth, copied}

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/compose.bend&name=Co
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/compose.bend&name=Item
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/compose.bend&name=Open
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/compose.bend&name=item.val