ProofSpeed.cell_none: def of minebender-game@1.0.0.0
Import: import minebender-game@1.0.0.0/proof_speed.bend as ProofSpeed
Lines 149-161 of minebender-game@1.0.0.0/proof_speed.bend: https://jend.leeeet.dev/read.txt?path=minebender-game@1.0.0.0/proof_speed.bend&start_line=149&end_line=161

import Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/board.bend as B
import minebender-game@1.0.0.0/solver.bend as S
import minebender-game@1.0.0.0/proof_base.bend as P
import minebender-game@1.0.0.0/proof_lists.bend as PL

# The row of an unassigned cell, and the cell in it.
def cell_none(+w: Nat, +h: Nat, +part: T.Grid(Maybe<&2, Bool>), +x: Nat, +y: Nat,
  +sh: {B.shaped(Maybe<&2, Bool>, w, h, part) == True{} : Bool}, +on: {B.on_board(w, h, T.Pos{x, y}) == True{} : Bool},
  fr: {S.look(part, T.Pos{x, y}) == None{} : Maybe<&2, Bool>}) ->
  {List.get(&2, Maybe<&2, Bool>, PL.row_of(Maybe<&2, Bool>, part, y), x) == Some{None{}} : Maybe<&2, Maybe<&2, Bool>>}:
  +xw = P.and_true_l(Nat.is_lt(x, w), Nat.is_lt(y, h), on)
  +yh = P.and_true_r(Nat.is_lt(x, w), Nat.is_lt(y, h), on)
  +row = PL.row_of(Maybe<&2, Bool>, part, y)
  +xl = {%Equal.sym(Nat, List.length(&2, Maybe<&2, Bool>, row), w, PL.row_in_len(Maybe<&2, Bool>, w, h, part, y, sh, yh)) :
    {Nat.is_lt(x, _) == True{} : Bool};
    xw : {Nat.is_lt(x, List.length(&2, Maybe<&2, Bool>, row)) == True{} : Bool}}
  %fr : {List.get(&2, Maybe<&2, Bool>, row, x) == Some{_} : Maybe<&2, Maybe<&2, Bool>>}
  PL.get_in(Maybe<&2, Bool>, row, x, None{}, xl)

Uses (17):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.get
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/board.bend&name=on_board
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/board.bend&name=shaped
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_base.bend&name=and_true_l
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_base.bend&name=and_true_r
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_lists.bend&name=get_in
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_lists.bend&name=row_in_len
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/proof_lists.bend&name=row_of
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/solver.bend&name=look
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/types.bend&name=Grid
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/types.bend&name=Pos