pub fn build(f: fn(a) -> b) -> Builder(fn(a) -> b)

pub fn col(
  builder: Builder(fn(a) -> b),
  parse: fn(String) -> Result(a, Nil),
) -> Builder(b)

pub fn col_sep(
  builder: Builder(a),
  col_sep: String,
) -> Builder(a)

pub fn from_fs(
  builder: Builder(a),
  fs: file_stream.FileStream,
  acc: acc,
  add: fn(acc, a) -> acc,
) -> acc

pub fn from_fs_with_rest(
  builder: Builder(a),
  fs: file_stream.FileStream,
  acc: acc,
  add: fn(acc, #(a, List(String))) -> acc,
) -> acc

pub fn from_text(
  builder: Builder(a),
  text: String,
  acc: acc,
  add: fn(acc, a) -> acc,
) -> acc

pub fn from_text_with_rest(
  builder: Builder(a),
  text: String,
  acc: acc,
  add: fn(acc, #(a, List(String))) -> acc,
) -> acc

pub fn multi_col(
  builder: Builder(fn(a) -> b),
  count: Int,
  parse: fn(List(String)) -> Result(a, Nil),
) -> Builder(b)

const landmarks = "# Landmark,x,y
Parthenon,37.971528,23.726639
Stonehenge,51.178829,-1.826183
Colosseo,41.890251,12.492373"

const landmark_rows = [
  #("Parthenon", [37.971528, 23.726639]),
  #("Stonehenge", [51.178829, -1.826183]),
  #("Colosseo", [41.890251, 12.492373]),
]

assert landmark_rows
 == tysv.build({
   use name <- tysv.parsed
   use coordinates <- tysv.parsed
   #(name, coordinates)
 })
 |> tysv.col(Ok)
 |> tysv.multi_col(2, fn(tokens) {
   tokens |> list.map(float.parse) |> result.all
 })
 |> tysv.from_text(landmarks, list.new(), list.prepend)
 |> list.reverse

pub fn parsed(f: fn(a) -> b) -> fn(a) -> b

pub fn row_sep(
  builder: Builder(a),
  row_sep: String,
) -> Builder(a)

pub fn run(
  builder: Builder(a),
  acc: acc,
  add: fn(acc, #(a, List(String))) -> acc,
) -> acc

pub fn skip_header(
  builder: Builder(a),
  skip_header: Bool,
) -> Builder(a)