Ladder.o_sel: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/ladder.bend as Ladder
Lines 39-50 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/ladder.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/ladder.bend&start_line=39&end_line=50

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend as F
import bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend as L
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/limbs.bend as LM
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/fieldops.bend as FO
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/xbits.bend as XB

def o_sel(+one: Nat, +h1: {one == 1n : Nat}, +sw: U32, +s: Nat, +hs: {v(sw) == s : Nat}, +hb: {Nat.is_le(s, 1n) == True{} : Bool}, +a: List<&2, U32>, +b: List<&2, U32>, +oa: {LM.okb(32n, a, 255n) == True{} : Bool}, +ob: {LM.okb(32n, b, 255n) == True{} : Bool}) -> {LM.okb(32n, F.select(sw, a, b), 255n) == True{} : Bool}:
  match s:
    case 0n:
      %Equal.sym(U32, sw, 0, XB.u0(sw, hs)) : {LM.okb(32n, F.select(_, a, b), 255n) == True{} : Bool}
      %Equal.sym(List<&2, U32>, F.select(0, a, b), a, FO.select0(one, h1, 32n, a, b, oa, ob)) : {LM.okb(32n, _, 255n) == True{} : Bool}
      oa
    case 1n:
      %Equal.sym(U32, sw, 1, XB.u1(sw, hs)) : {LM.okb(32n, F.select(_, a, b), 255n) == True{} : Bool}
      %Equal.sym(List<&2, U32>, F.select(1, a, b), b, FO.select1(one, h1, 32n, a, b, oa, ob)) : {LM.okb(32n, _, 255n) == True{} : Bool}
      ob
    case 2n+q:
      Empty.absurd({LM.okb(32n, F.select(sw, a, b), 255n) == True{} : Bool}, L.false_true(hb))

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Empty.absurd
  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
  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_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/fieldops.bend&name=select0
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/fieldops.bend&name=select1
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/ladder.bend&name=v
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/limbs.bend&name=okb
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/xbits.bend&name=u0
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/xbits.bend&name=u1
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend&name=false_true
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend&name=select