Пример #1
0
Файл: ut_fuse.c Проект: bd/urbit
  static u3_noun
  _fuse_in(u3_noun van,
           u3_noun sut,
           u3_noun ref,
           u3_noun bix)
  {
    u3_noun p_sut, q_sut;

    if ( c3y == u3r_sing(sut, ref) || (c3__noun == ref) ) {
      return u3k(sut);
    }
    if ( c3n == u3du(sut) ) switch ( sut ) {
      default: return u3m_bail(c3__fail);

      case c3__noun:
      {
        return u3k(ref);
      }
      case c3__void:
      {
        return c3__void;
      }
    }
    else switch ( u3h(sut) ) {
      default: return u3m_bail(c3__fail);

      case c3__atom: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        if ( c3y == u3du(ref) ) {
          if ( c3__atom == u3h(ref) ) {
            u3_noun p_ref, q_ref;

            u3x_cell(u3t(ref), &p_ref, &q_ref);
            {
              u3_noun foc = (c3y == u3qf_fitz(p_ref, p_sut))
                              ? u3k(p_sut)
                              : u3k(p_ref);

              if ( c3y == u3du(q_sut) ) {
                if ( c3y == u3du(q_ref) ) {
                  if ( c3y == u3r_sing(q_ref, q_sut) ) {
                    return u3nt(c3__atom, foc, u3k(q_sut));
                  }
                  else { 
                    u3z(foc);
                    return c3__void;
                  }
                }
                else {
                  return u3nt(c3__atom, foc, u3k(q_sut));
                }
              } else {
                return u3nt(c3__atom, foc, u3k(q_ref));
              }
            }
          }
          else if ( c3__cell == u3h(ref) ) {
            return c3__void;
          }
        }
        return _fuse_in(van, ref, sut, bix);
      }
      case c3__cell: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun p_ref, q_ref;

        if ( c3y == u3r_pq(ref, c3__cell, &p_ref, &q_ref) ) {
          u3_noun hed = _fuse_in(van, p_sut, p_ref, bix);
          u3_noun tal = _fuse_in(van, q_sut, q_ref, bix);
          u3_noun ret = u3qf_cell(hed, tal);

          u3z(hed);
          u3z(tal);
          return ret;
        }
        else return _fuse_in(van, ref, sut, bix);
      }
      case c3__core:
      {
        return _fuse_repo(van, sut, ref, bix);
      }
      case c3__help: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun vot = _fuse_in(van, q_sut, ref, bix);
        u3_noun ret = u3qf_help(p_sut, vot);

        u3z(vot);
        return ret;
      }
      case c3__face: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun vot = _fuse_in(van, q_sut, ref, bix);
        u3_noun ret = u3qf_face(p_sut, vot);

        u3z(vot);
        return ret;
      }
      case c3__fork: p_sut = u3t(sut);
      {
        u3_noun yed = u3qdi_tap(p_sut);
        u3_noun ret = u3kf_fork(_fuse_in_fork(van, yed, ref, bix));

        u3z(yed);
        return ret;
      }
      case c3__hold:
      {
        u3_noun hud = u3nc(u3k(sut), u3k(ref));

        if ( c3y == u3qdi_has(bix, hud) ) {
          //  u3_noun dun = u3qfu_dunq(van, "type", sut);
          //  u3_noun niz = u3qfu_dunq(van, "over", ref);

          //  u3t_push(u3nc(c3__mean, dun));
          //  u3t_push(u3nc(c3__mean, niz));

          return u3m_error("fuse-loop");
        } else {
          u3_noun bux = u3qdi_put(bix, hud);
          u3_noun ret = _fuse_repo(van, sut, ref, bux);

          u3z(hud);
          u3z(bux);
          return ret;
        }
      }
    }
  }
Пример #2
0
  static u3_noun
  _play_in(u3_noun van,
           u3_noun sut,
           u3_noun gen)
  {
    u3_noun p_gen, q_gen, r_gen;

    if ( c3n == u3du(gen) ) {
      open: {
        u3_noun ter = u3r_at(u3x_con_3, van);
        u3_noun rex = u3qfp_open(ter, gen);
        u3_noun ret;

        if ( c3y == u3r_sing(rex, gen) ) {
          u3_noun zix = u3qfu_shep(van, "gene", 'q', u3k(gen));

          u3t_push(u3nc(c3__mean, zix));
          return u3m_error("play-open");
        }
        ret = _play_x(van, sut, rex);
        u3z(rex);

        return ret;
      }
    }
    else if ( c3y == u3du(u3h(gen)) ) {
      _play_used();
      {
        u3_noun dis = _play_x(van, sut, u3h(gen));
        u3_noun dat = _play_x(van, sut, u3t(gen));
        u3_noun ret = u3qf_cell(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }
    }
    else switch ( u3h(gen) ) {
      default: goto open;

      case c3__fits: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_bean();
      }

      case c3__if: u3x_trel(u3t(gen), &p_gen, &q_gen, &r_gen);
      _play_used();
      {
        u3_noun fex = u3qfu_gain(van, sut, p_gen);
        u3_noun wux = u3qfu_lose(van, sut, p_gen);
        u3_noun dez = (fex == c3__void) ? c3__void
                                        : _play_x(van, fex, q_gen);
        u3_noun doz = (wux == c3__void) ? c3__void
                                        : _play_x(van, wux, r_gen);
        u3_noun ret = u3qf_forq(dez, doz);

        u3z(dez); u3z(doz);
        u3z(fex); u3z(wux);
        return ret;
      }

      case c3__cons: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun dis = _play_x(van, sut, p_gen);
        u3_noun dat = _play_x(van, sut, q_gen);
        u3_noun ret = u3qf_cell(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }

      case c3__wish: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun nog = u3nc(c3__bunt, u3k(p_gen));
        u3_noun ret = _play_x(van, sut, nog);

        u3z(nog);
        return ret;
      }

      case c3__deep: p_gen = u3t(gen);
      _play_used();
      {
        return _play_bean();
      }

      case c3__same: u3x_cell(u3t(gen), &p_gen, &q_gen); 
      _play_used();
      {
        return _play_bean();
      }
      
      case c3__bump: p_gen = u3t(gen);
      _play_used();
      {
        return u3nt(c3__atom, u3_blip, u3_nul);
      }

      case c3__rock: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_rock(p_gen, q_gen);
      }

      case c3__nock: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return c3__noun;
      }

      case c3__sand: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_sand(p_gen, q_gen);
      }

      case c3__hand: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return u3k(p_gen);
      }

      case c3__iron: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun pro = u3qfu_wrap(van, boc, c3__iron);

        u3z(boc);
        return pro;
      }

      case c3__zinc: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun pro = u3qfu_wrap(van, boc, c3__zinc);

        u3z(boc);
        return pro;
      }

      case c3__lead: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun pro = u3qfu_wrap(van, boc, c3__lead);

        u3z(boc);
        return pro;
      }

      case c3__name: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, q_gen);
        u3_noun ret = u3qfu_conk(van, boc, p_gen);

        u3z(boc);
        return ret;
      }

      case c3__burn: p_gen = u3t(gen);
      _play_used();
      {
        return _play_x(van, sut, p_gen);
      }

      case c3__like: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_x(van, sut, p_gen);
      }

      case c3__per: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun ret = _play_x(van, boc, q_gen);

        u3z(boc);
        return ret;
      }

      case c3__aka: u3x_trel(u3t(gen), &p_gen, &q_gen, &r_gen);
      _play_used();
      {
        u3_noun boc = u3qfu_buss(van, sut, p_gen, q_gen);
        u3_noun ret = _play_x(van, boc, r_gen);

        u3z(boc);
        return ret;
      }

      case c3__make: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_cnts(van, sut, p_gen, q_gen);
      }

      case c3__core: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun ruf = u3nc(u3_nul, 1);
        u3_noun ret = _play_grow(van, sut, c3__gold, ruf, p_gen);

        u3z(ruf);
        return ret;
      }

      case c3__peep: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun typ = u3qfu_play(van, sut, p_gen);
        u3_noun dug = u3qfu_duck(van, typ);
        u3_noun ret;

        u3t_push(u3nc(c3__mean, dug));
        {
          ret = _play_x(van, sut, q_gen);
        }
        u3t_drop();

        u3z(typ);
        return ret;
      }

      case c3__hint: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_x(van, sut, q_gen);
      }

      case c3__code: p_gen = u3t(gen);
      _play_used();
      {
        return c3__noun;
      }

      case c3__twig: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_x(van, sut, p_gen);
      }

      case c3__dbug: u3x_cell(u3t(gen), &p_gen, &q_gen);
      {
        u3_noun ret;

        u3t_push(u3nc(c3__mean, _play_loc(van, p_gen)));
        {
          ret = _play_x(van, sut, q_gen);
        }
        u3t_drop();
        return ret;
      }

      case c3__spit: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun zur = _play_x(van, sut, p_gen);
        u3_noun vos = _play_x(van, sut, q_gen);
        u3_noun ret = u3qf_cell(zur, vos);

        u3z(zur);
        u3z(vos);

        return ret;
      }

      case c3__lost:
      case c3__fail:
      _play_used();
      {
        return c3__void;
      }
    }
  }
Пример #3
0
Файл: ut_play.c Проект: bd/urbit
  static u3_noun
  _play_in(u3_noun van,
           u3_noun sut,
           u3_noun gen)
  {
    u3_noun p_gen, q_gen, r_gen;

    if ( c3n == u3du(gen) ) {
      open: {
        u3_noun fab = u3r_at(u3qfu_van_fab, van);
        u3_noun ter = u3r_at(u3x_con_3, van);
        u3_noun rex = (c3n == fab) ? u3qfp_nepo(ter, gen)
                                   : u3qfp_open(ter, gen);
        u3_noun ret;

        if ( c3y == u3r_sing(rex, gen) ) {
          u3_noun zix = u3qfu_shep(van, "gene", 'q', u3k(gen));

          u3t_push(u3nc(c3__mean, zix));
          return u3m_error("play-open-z");
        }
        ret = _play_x(van, sut, rex);
        u3z(rex);

        return ret;
      }
    }
    else if ( c3y == u3du(u3h(gen)) ) {
      _play_used();
      {
        u3_noun dis = _play_x(van, sut, u3h(gen));
        u3_noun dat = _play_x(van, sut, u3t(gen));
        u3_noun ret = u3qf_cell(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }
    }
    else switch ( u3h(gen) ) {
      default: goto open;

      case c3__fits: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_bean();
      }

      case c3__wtcl: u3x_trel(u3t(gen), &p_gen, &q_gen, &r_gen);
      _play_used();
      {
        u3_noun fex = u3qfu_gain(van, sut, p_gen);
        u3_noun wux = u3qfu_lose(van, sut, p_gen);
        u3_noun dez = (fex == c3__void) ? c3__void
                                        : _play_x(van, fex, q_gen);
        u3_noun doz = (wux == c3__void) ? c3__void
                                        : _play_x(van, wux, r_gen);
        u3_noun ret = u3qf_forq(dez, doz);

        u3z(dez); u3z(doz);
        u3z(fex); u3z(wux);
        return ret;
      }

      case c3__clhp: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun dis = _play_x(van, sut, p_gen);
        u3_noun dat = _play_x(van, sut, q_gen);
        u3_noun ret = u3qf_cell(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }

      case c3__dtkt: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun nog = u3nc(c3__bunt, u3k(p_gen));
        u3_noun ret = _play_x(van, sut, nog);

        u3z(nog);
        return ret;
      }

      case c3__dtwt: p_gen = u3t(gen);
      _play_used();
      {
        return _play_bean();
      }

      case c3__dtts: u3x_cell(u3t(gen), &p_gen, &q_gen); 
      _play_used();
      {
        return _play_bean();
      }
      
      case c3__dtls: p_gen = u3t(gen);
      _play_used();
      {
        return u3nt(c3__atom, u3_blip, u3_nul);
      }

      case c3__rock: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_rock(p_gen, q_gen);
      }

      case c3__dttr: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return c3__noun;
      }

      case c3__sand: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_sand(p_gen, q_gen);
      }

      case c3__hand: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return u3k(p_gen);
      }

      case c3__ktbr: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun pro = u3qfu_wrap(van, boc, c3__iron);

        u3z(boc);
        return pro;
      }

      case c3__ktpm: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun pro = u3qfu_wrap(van, boc, c3__zinc);

        u3z(boc);
        return pro;
      }

      case c3__ktwt: p_gen = u3t(gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun pro = u3qfu_wrap(van, boc, c3__lead);

        u3z(boc);
        return pro;
      }

      case c3__help: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, q_gen);
        u3_noun ret = u3qf_help(p_gen, boc);

        u3z(boc);
        return ret;
      }

      case c3__docs: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, q_gen);
        u3_noun hep = u3nc(c3__docs, u3k(p_gen));
        u3_noun ret = u3qf_help(hep, boc);

        u3z(hep);
        u3z(boc);
        return ret;
      }

      case c3__ktts: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, q_gen);
        u3_noun ret = u3qfu_conk(van, boc, p_gen);

        u3z(boc);
        return ret;
      }

      case c3__tune: p_gen = u3t(gen);
      _play_used();
      {
        return u3qf_face(p_gen, sut);
      }

      case c3__ktsg: p_gen = u3t(gen);
      _play_used();
      {
        return _play_x(van, sut, p_gen);
      }

      case c3__ktls: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_x(van, sut, p_gen);
      }

      case c3__tsgr: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = _play_x(van, sut, p_gen);
        u3_noun ret = _play_x(van, boc, q_gen);

        u3z(boc);
        return ret;
      }

      case c3__tstr: u3x_trel(u3t(gen), &p_gen, &q_gen, &r_gen);
      _play_used();
      {
        u3_noun boc = u3qfu_buss(van, sut, p_gen, q_gen);
        u3_noun ret = _play_x(van, boc, r_gen);

        u3z(boc);
        return ret;
      }

      case c3__tscm: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun boc = u3qfu_busk(van, sut, p_gen);
        u3_noun ret = _play_x(van, boc, q_gen);

        u3z(boc);
        return ret;
      }

      case c3__cnts: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_cnts(van, sut, p_gen, q_gen);
      }

      case c3__brcn: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun ruf = u3nc(u3_nul, 1);
        u3_noun ret = _play_grow(van, sut, c3__gold, ruf, p_gen, q_gen);

        u3z(ruf);
        return ret;
      }

      case c3__sgzp: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun typ = u3qfu_play(van, sut, p_gen);
        u3_noun dug = u3qfu_duck(van, typ);
        u3_noun ret;

        u3t_push(u3nc(c3__mean, dug));
        {
          ret = _play_x(van, sut, q_gen);
        }
        u3t_drop();

        u3z(typ);
        return ret;
      }

      case c3__sggr: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_x(van, sut, q_gen);
      }

      case c3__zpts: p_gen = u3t(gen);
      _play_used();
      {
        return c3__noun;
      }

      case c3__ktcn: p_gen = u3t(gen);
      {
        u3_noun von = u3i_molt(u3k(van), u3qfu_van_fab, c3n, 0);
        u3_noun ret = _play_x(von, sut, p_gen);

        u3z(von);
        return ret;
      }

      case c3__zpcm: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        return _play_x(van, sut, p_gen);
      }

      case c3__dbug: u3x_cell(u3t(gen), &p_gen, &q_gen);
      {
        u3_noun ret;

#if 0
        {
          u3_noun cog = _play_loc_term(van, p_gen);

          u3t_heck(cog);
          u3z(cog);
        }
#endif
        u3t_push(u3nc(c3__mean, _play_loc(van, p_gen)));
        {
          ret = _play_x(van, sut, q_gen);
        }
        u3t_drop();
        return ret;
      }

      case c3__zpmc:
      case c3__zpsm: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _play_used();
      {
        u3_noun zur = _play_x(van, sut, p_gen);
        u3_noun vos = _play_x(van, sut, q_gen);
        u3_noun ret = u3qf_cell(zur, vos);

        u3z(zur);
        u3z(vos);

        return ret;
      }

      case c3__lost:
      case c3__fail:
      case c3__zpzp:
      _play_used();
      {
        return c3__void;
      }
    }
  }
Пример #4
0
  static u3_noun
  _fire_each(u3_noun van,
             u3_noun vet,
             u3_noun typ,
             u3_noun gat)
  {
    u3_noun p_typ, q_typ, pq_typ, qq_typ, rq_typ;
    u3_noun h_gat, t_gat;

    if ( (c3n == u3du(typ)) || (c3__core != u3h(typ)) ) {
      return u3m_error("fire-core");
    } else if
         ( (c3n == u3r_cell(u3t(typ), &p_typ, &q_typ)) ||
           (c3n == u3r_trel(q_typ, &pq_typ, &qq_typ, &rq_typ)) ||
           (c3n == u3r_cell(gat, &h_gat, &t_gat)) )
    {
      return u3m_bail(c3__fail);
    } else {
      u3_noun dox = u3nt
        (c3__core, u3k(qq_typ), u3k(q_typ));

      if ( c3__ash == u3h(gat) ) {
        if ( (c3y == vet) &&
             (c3n == u3qfu_nest
                (van, qq_typ, c3y, p_typ)) )
        {
#if 0
          u3_noun dun = u3qfu_dunq(van, "need", qq_typ);
          u3_noun niz = u3qfu_dunq(van, "have", p_typ);

          u3t_push(u3nc(c3__mean, niz));
          u3t_push(u3nc(c3__mean, dun));
#endif
          return u3m_error("fire-dry");
        }
        else {
          return u3nc(dox, u3k(t_gat));
        }
      }
      else {
        c3_assert(c3__elm == u3h(gat));

        if ( (c3y == vet) &&
             // (c3n == u3r_sing(p_typ, qq_typ)) &&
             (c3n == _fire_mull(van, typ, dox, t_gat)) )
        {
#if 0
          u3_noun dun = u3qfu_dunq(van, "wild", typ);
          u3_noun niz = u3qfu_dunq(van, "tame", dox);

          u3t_push(u3nc(c3__mean, dun));
          u3t_push(u3nc(c3__mean, niz));
#endif
          return u3m_error("fire-wet");
        }
        else {
          u3z(dox);
          return u3nc(u3k(typ), u3k(t_gat));
        }
      }
    }
  }
Пример #5
0
  static u3_noun
  _peek_in(u3_noun van,
           u3_noun sut,
           u3_noun way,
           u3_atom axe,
           u3_noun gil)
  {
    u3_noun p_sut, q_sut;
    u3_noun pro;

    if ( (c3n == u3du(sut)) ) switch ( sut ) {
      default: return u3m_bail(c3__fail);

      case c3__noun: {
        return c3__noun;
      }
      case c3__void: {
        return c3__void;
      }
    }
    else switch ( u3h(sut) ) {
      default: return u3m_bail(c3__fail);

      case c3__atom: {
        return c3__void;
      }
      case c3__cell: {
        if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
          return u3m_bail(c3__fail);
        } else {
          u3_atom tip = u3qc_cap(axe);
          u3_atom tap = u3qc_mas(axe);

          if ( 2 == tip ) {
            pro = _cqfu_peek(van, p_sut, way, tap);
          }
          else {
            pro = _cqfu_peek(van, q_sut, way, tap);
          }
          u3z(tap);
          u3z(tip);

          return pro;
        }
      }
      case c3__core: {
        u3_noun pq_sut, qq_sut, rq_sut;
        u3_noun prq_sut, qrq_sut;

        if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ||
             (c3n == u3r_trel(q_sut, &pq_sut, &qq_sut, &rq_sut)) ||
             (c3n == u3r_cell(rq_sut, &prq_sut, &qrq_sut)) )
        {
          return u3m_bail(c3__fail);
        } else {
          u3_atom tip = u3qc_cap(axe);
          u3_atom tap = u3qc_mas(axe);

          if ( 3 == tip ) {
            if ( c3n == u3qfu_park(van, sut, way, tap) )
            {
              // u3_noun dun = u3qfu_dunq(van, "type", sut);
              u3_noun waz = u3qfu_shep
                (van, "axis", 'd', u3k(axe));

              // u3t_push(u3nc(c3__mean, dun));
              u3t_push(u3nc(c3__mean, waz));

              return u3m_error("peek-park");
            }
            else pro = _cqfu_peek(van, p_sut, way, tap);
          }
          else {
            pro = c3__noun;
          }
          u3z(tap);
          u3z(tip);

          return pro;
        }
      }
      case c3__face: {
        if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
          return u3m_bail(c3__fail);
        } else {
          return _peek_in(van, q_sut, way, axe, gil);
        }
      }
      case c3__fork: p_sut = u3t(sut);
      {
        u3_noun yed = u3qdi_tap(p_sut, u3_nul);
        u3_noun ret = u3kf_fork(_peek_fork(van, yed, way, axe, gil));

        u3z(yed);
        return ret;
      }
      case c3__hold: {
        if ( (c3y == u3qdi_has(gil, sut)) ) {
          return c3__void;
        }
        else {
          u3_noun zoc = u3qdi_put(gil, sut);
          u3_noun fop = u3qfu_repo(van, sut);
          u3_noun pro = _peek_in(van, fop, way, axe, zoc);

          u3z(fop);
          u3z(zoc);

          return pro;
        }
      }
    }
  }
Пример #6
0
  static u3_noun
  _heal_to(
           u3_noun van,
           u3_noun sut,
           u3_noun gil,
           u3_noun qog,
           u3_noun ref,
           u3_atom now,
           u3_atom lat)
  {
    u3_noun p_sut, q_sut;

    if ( c3n == u3du(sut) ) {
      goto repo;
    }
    else switch ( u3h(sut) ) {
      default: goto repo;

      case c3__atom: return c3__void;

      case c3__bull: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun sub = _heal_to(van, q_sut, gil, qog, ref, now, lat);
        u3_noun ret;

        ret = u3qfu_busk
          (van, sub, u3h(p_sut), u3h(u3t(p_sut)));

        u3z(sub);
        return ret;
      }
      case c3__cell: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun ter, ret;

        if ( 2 == now ) {
          ter = _heal_as(van, p_sut, qog, lat, ref);
          ret = u3qf_cell(ter, q_sut);
        } else {
          ter = _heal_as(van, q_sut, qog, lat, ref);
          ret = u3qf_cell(p_sut, ter);
        }
        u3z(ter);
        return ret;
      }

      case c3__core: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        if ( 3 != now ) {
          return u3m_error("heal-core");
        } else {
          u3_noun ter = _heal_as(van, p_sut, qog, lat, ref);
          u3_noun ret = u3qf_core(ter, q_sut);

          u3z(ter);
          return ret;
        }
      }
      case c3__face: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun dun = _heal_to(van, q_sut, gil, qog, ref, now, lat);
        u3_noun ret = u3qf_face(p_sut, dun);

        u3z(dun);
        return ret;
      }
      case c3__fork: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun dis = _heal_to(van, p_sut, gil, qog, ref, now, lat);
        u3_noun dat = _heal_to(van, q_sut, gil, qog, ref, now, lat);
        u3_noun ret = u3qf_fork(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }

      case c3__hold: {
        if ( (c3y == u3qdi_has(gil, sut)) ) {
          return c3__void;
        }
        else {
          u3_noun zoc = u3qdi_put(gil, sut);
          u3_noun rep = u3qfu_repo(van, sut);
          u3_noun ret = _heal_to(van, rep, zoc, qog, ref, now, lat);

          u3z(rep);
          u3z(zoc);

          return ret;
        }
      }
    }

    repo: {
      u3_noun rep = u3qfu_repo(van, sut);
      u3_noun ret = _heal_to(van, rep, gil, qog, ref, now, lat);

      u3z(rep);
      return ret;
    }
  }
Пример #7
0
  static u3_noun
  _heal_by(
           u3_noun van,
           u3_noun sut,
           u3_noun qog,
           u3_noun ref)
  {
    u3_noun p_sut, q_sut;

    if ( c3n == u3du(sut) ) {
      return u3m_error("heal-name");
    }
    else switch ( u3h(sut) ) {
      default: return u3m_error("heal-name");

      case c3__core:
      {
        return u3k(ref);
      }
      case c3__bull: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        if ( c3y == u3r_sing(u3h(p_sut), u3t(qog)) ) {
          return u3k(ref);
        }
        else {
          u3_noun sub = _heal_by(van, q_sut, qog, ref);
          u3_noun ret;

          ret = u3qfu_busk
            (van, sub, u3h(p_sut), u3h(u3t(p_sut)));

          u3z(sub);
          return ret;
        }
      }
      case c3__face: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        if ( c3y == u3r_sing(p_sut, u3t(qog)) ) {
          return u3qf_face(p_sut, ref);
        }
        else return u3m_error("heal-name");
      }
      case c3__hold: {
        u3_noun rep = u3qfu_repo(van, sut);
        u3_noun ret = _heal_by(van, rep, qog, ref);

        u3z(rep);
        return ret;
      }
      case c3__fork: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun dis = _heal_by(van, p_sut, qog, ref);
        u3_noun dat = _heal_by(van, q_sut, qog, ref);
        u3_noun ret = u3qf_fork(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }
    }
  }
Пример #8
0
  static u3_noun
  _mint_in(u3_noun van,
           u3_noun sut,
           u3_noun gol,
           u3_noun gen)
  {
    u3_noun p_gen, q_gen, r_gen;
    u3_noun ret;

    if ( (c3__void == sut) &&
         !((c3y == u3du(gen)) && (c3__zpcb == u3h(gen))) )
    {
      if ( (c3n == _mint_vet(van))
           || ((c3y == u3du(gen)) &&
               ((c3__zpfs == u3h(gen)) || (c3__zpzp == u3h(gen)))) )
      {
        return u3nt(c3__void, 0, 0);
      }
      else {
        return u3m_error("mint-vain");
      }
    }

    if ( c3n == u3du(gen) ) {
      u3_noun ter = u3r_at(u3x_con_3, van);
      u3_noun rex = u3qfp_open(ter, gen);

      ret = _mint_in(van, sut, gol, rex);
      u3z(rex);

      return ret;
    }
    else if ( c3y == u3du(u3h(gen)) ) {
      _mint_used();
      {
        u3_noun hed = _mint_in(van, sut, c3__noun, u3h(gen));
        u3_noun tal = _mint_in(van, sut, c3__noun, u3t(gen));
        u3_noun typ = u3qf_cell(u3h(hed), u3h(tal));

        ret = u3nc
          (
           _mint_nice(van, gol, typ),
           u3qf_cons(u3t(hed), u3t(tal)));

        u3z(hed);
        u3z(tal);

        return ret;
      }
    } else switch ( u3h(gen) ) {
      default: {
        u3_noun ter = u3r_at(u3x_con_3, van);
        u3_noun rex = u3qfp_open(ter, gen);

        if ( c3y == u3r_sing(rex, gen) ) {
#if 1
          u3_noun zix = u3qfu_shep(van, "gene", 'q', u3k(gen));

          u3t_push(u3nc(c3__mean, zix));
          return u3m_error("mint-open");
#else
          u3_err("h", u3h(gen));
          return u3m_bail(c3__fail);
#endif
        }
        ret = _mint_in(van, sut, gol, rex);
        u3z(rex);

        return ret;
      }

      case c3__bcpt: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun sep = u3qfu_seep(van, sut, c3__read, p_gen);
        u3_noun axe = u3h(sep);
        u3_noun rex = u3qfl_whip(van, q_gen, axe);
        u3_noun ret = _mint_in(van, sut, gol, rex);

        u3z(sep);
        u3z(rex);

        return ret;
      }

      case c3__wtts: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun nob = u3qfl_bunt(van, p_gen);
        u3_noun dok = u3nc(c3__cnzz, u3k(q_gen));
        u3_noun vol = _mint_corn(van, sut, dok);
        u3_noun axe = _mint_coke(vol);
        u3_noun wam = u3qfu_play(van, sut, nob);

        ret = u3nc
          (
           _mint_nice(van, gol, _mint_bean()),
           u3qfu_fish(van, wam, axe));

        u3z(axe);
        u3z(wam);
        u3z(nob);
        u3z(dok);

        return ret;
      }

      case c3__wtcl: u3x_trel(u3t(gen), &p_gen, &q_gen, &r_gen);
      _mint_used();
      {
        u3_noun bol = _mint_bean();
        u3_noun nor = _mint_in(van, sut, bol, p_gen);
        u3_noun fex = u3qfu_gain(van, sut, p_gen);
        u3_noun wux = u3qfu_lose(van, sut, p_gen);
        u3_noun duy = (c3__void == fex)
                        ? ( (c3__void == wux)
                             ?  u3nc(0, 0)
                             :  u3nc(1, 1) )
                        : ( (c3__void == wux)
                            ?  u3nc(1, 0)
                            :  u3k(u3t(nor)) );
        u3_noun hiq = _mint_in(van, fex, gol, q_gen);
        u3_noun ran = _mint_in(van, wux, gol, r_gen);

        ret = u3nc
          (u3qf_fork(u3h(hiq), u3h(ran)),
                  _mint_cond(duy,
                                    u3k(u3t(hiq)),
                                    u3k(u3t(ran))));

        u3z(ran);
        u3z(hiq);
        u3z(nor);
        u3z(wux);
        u3z(fex);
        u3z(bol);

        return ret;
      }
      case c3__clhp: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun hed = _mint_in(van, sut, c3__noun, p_gen);
        u3_noun tal = _mint_in(van, sut, c3__noun, q_gen);
        u3_noun typ = u3qf_cell(u3h(hed), u3h(tal));

        ret = u3nc
          (
           _mint_nice(van, gol, typ),
           u3qf_cons(u3t(hed), u3t(tal)));

        u3z(hed);
        u3z(tal);

        return ret;
      }
      case c3__dtts: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun typ = _mint_nice(van, gol, _mint_bean());
        u3_noun one = _mint_corn(van, sut, p_gen);
        u3_noun two = _mint_corn(van, sut, q_gen);

        return u3nc(typ, u3nt(5, one, two));
      }
      case c3__dtwt: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun typ = _mint_nice(van, gol, _mint_bean());

        return u3nc
          (
           typ,
           u3nc(3, _mint_corn(van, sut, p_gen)));
      }
      case c3__dtkt: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun tom = c3__noun;
        u3_noun sam = _mint_in(van, sut, tom, p_gen);

        ret = u3nc
          (
           _mint_nice(van, gol, tom),
           u3nc(11, u3k(u3t(sam))));

        u3z(sam);
        return ret;
      }
      case c3__dtls: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun tom = u3nc(c3__atom, u3_blip);
        u3_noun sam = _mint_in(van, sut, tom, p_gen);

        ret = u3nc
          (
           _mint_nice(van, gol, tom),
           u3nc(4, u3k(u3t(sam))));

        u3z(sam);
        return ret;
      }
      case c3__dtzz: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun boc = (c3n == u3ud(q_gen))
                        ? c3__noun
                        : u3nc(c3__atom, u3k(p_gen));
        u3_noun typ = u3qf_cube(q_gen, boc);
        u3_noun ret =
            u3nc(
                  _mint_nice(van, gol, typ),
                  u3nc(1, u3k(q_gen)));

        u3z(boc);
        return ret;
      }
      case c3__dttr: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun one = _mint_corn(van, sut, p_gen);
        u3_noun two = _mint_corn(van, sut, q_gen);

        return u3nc
          (
           _mint_nice(van, gol, c3__noun),
           u3nt(2, one, two));
      }
      case c3__dtzy: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun typ = u3qfu_play(van, sut, gen);
        u3_noun ret =
            u3nc(
                  _mint_nice(van, gol, typ),
                  u3nc(1, u3k(q_gen)));

        return ret;
      }
      case c3__ktbr: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun ryd = _mint_in(van, sut, gol, p_gen);
        u3_noun tyf = u3qfu_wrap(van, u3h(ryd), c3__iron);
        u3_noun pro = u3nc(tyf, u3k(u3t(ryd)));

        u3z(ryd);
        return pro;
      }
      case c3__ktpm: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun ryd = _mint_in(van, sut, gol, p_gen);
        u3_noun tyf = u3qfu_wrap(van, u3h(ryd), c3__zinc);
        u3_noun pro = u3nc(tyf, u3k(u3t(ryd)));

        u3z(ryd);
        return pro;
      }
      case c3__ktwt: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun ryd = _mint_in(van, sut, gol, p_gen);
        u3_noun tyf = u3qfu_wrap(van, u3h(ryd), c3__lead);
        u3_noun pro = u3nc(tyf, u3k(u3t(ryd)));

        u3z(ryd);
        return pro;
      }
      case c3__ktts: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun vat = _mint_in(van, sut, gol, q_gen);

        ret = u3nc
          (
           u3qfu_conk(van, u3h(vat), p_gen),
           u3k(u3t(vat)));

        u3z(vat);
        return ret;
      }
      case c3__ktzp: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun vat = _mint_in(van, sut, gol, q_gen);

        ret = u3nc
          (
           u3qfu_conk(van, u3h(vat), p_gen),
           u3k(u3t(vat)));

        u3z(vat);
        return ret;
      }
      case c3__ktsg: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun nef = _mint_in(van, sut, gol, p_gen);
        u3_noun p_nef = u3h(nef);
        u3_noun q_nef = u3t(nef);
        u3_noun fom;

        {
          u3_noun cag = u3qfu_burn(van, sut);
          u3_noun wim = u3n_nock_an(cag, u3k(q_nef));

          if ( 0 == u3h(wim) ) {
            fom = u3nc(1, u3k(u3t(wim)));
          } else {
            fom = u3k(q_nef);
          }
          u3z(wim);
        }
        ret = u3nc(u3k(p_nef), fom);

        u3z(nef);
        return ret;
      }
      case c3__ktls: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun huz = u3qfu_play(van, sut, p_gen);
        u3_noun hif = _mint_nice(van, gol, huz);
        u3_noun zel = _mint_in(van, sut, hif, q_gen);
        u3_noun ret = u3nc(hif, u3k(u3t(zel)));

        u3z(zel);
        return ret;
      }
      case c3__kthx: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun huz = u3qfu_play(van, sut, p_gen);
        u3_noun hif = _mint_nice(van, gol, huz);
        u3_noun zel = _mint_in(van, sut, hif, q_gen);
        u3_noun ret = u3nc(hif, u3k(u3t(zel)));

#if 0
        {
          u3_noun goz = u3qfu_play(van, sut, q_gen);
          u3_noun bar;

          FOO = 1;
          fprintf(stderr, "\r\n");
          bar = u3qfu_nest(van, huz, c3n, goz);
          fprintf(stderr, "kthx: bar %d\r\n", bar);
          FOO = 0;
        }
#endif
        u3z(zel);
        return ret;
      }
      case c3__tsgr: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun fid = _mint_in(van, sut, c3__noun, p_gen);
        u3_noun p_fid = u3h(fid);
        u3_noun q_fid = u3t(fid);
        u3_noun dov = _mint_in(van, p_fid, gol, q_gen);
        u3_noun p_dov = u3h(dov);
        u3_noun q_dov = u3t(dov);

        ret = u3nc
          (u3k(p_dov),
                  u3qf_comb(q_fid, q_dov));

        u3z(fid);
        u3z(dov);
        return ret;
      }
      case c3__tstr: u3x_trel(u3t(gen), &p_gen, &q_gen, &r_gen);
      _mint_used();
      {
        u3_noun sep = u3qfu_seep(van, sut, c3__both, q_gen);
        u3_noun bid = u3nt(u3k(p_gen), u3k(q_gen), sep);
        u3_noun boc = u3qf_bull(bid, sut);
        u3_noun ret = _mint_in(van, boc, gol, r_gen);

        u3z(bid);
        u3z(boc);

        return ret;
      }
      case c3__cnts: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun sec = u3qfu_seek(van, sut, c3__read, p_gen);
        u3_noun lar = _mint_foil(sec);
        u3_noun p_lar = u3h(lar);
        u3_noun q_lar = u3t(lar);
        u3_noun pq_lar = u3h(q_lar);
        u3_noun qq_lar = u3t(q_lar);
        u3_noun mew = u3qfu_snub(van, sut, q_gen);
        u3_noun yom = _mint_edit
          (van, sut, mew, p_lar, u3k(qq_lar), u3_nul);
        u3_noun p_yom = u3h(yom);
        u3_noun q_yom = u3t(yom);
        u3_noun ret = u3nc
          (_mint_nice(van, gol, u3k(p_yom)),
                  (0 == pq_lar) ? u3k(q_yom)
                                : u3nt(9, u3k(pq_lar), u3k(q_yom)));

        u3z(yom);
        u3z(mew);
        u3z(lar);

        return ret;
      }
      case c3__pmcl: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun ruf = u3nt
          (c3__clhp,
                  u3nc(u3_nul, 1),
                  u3k(p_gen));
        u3_noun ret = _mint_grow(van, sut, gol, c3__zinc, ruf, q_gen);

        u3z(ruf);
        return ret;
      }
      case c3__brcn: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun ruf = u3nc(u3_nul, 1);

        ret = _mint_grow(van, sut, gol, c3__gold, ruf, p_gen);
        u3z(ruf);

        return ret;
      }
      case c3__pmcn: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun ruf = u3nc(u3_nul, 1);

        ret = _mint_grow(van, sut, gol, c3__lead, ruf, p_gen);
        u3z(ruf);

        return ret;
      }
      case c3__pmls: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun ruf = u3nt
          (c3__clhp,
                  u3nc(u3_nul, 1),
                  u3k(p_gen));
        u3_noun ret = _mint_grow(van, sut, gol, c3__iron, ruf, q_gen);

        u3z(ruf);
        return ret;
      }
      case c3__sgzp: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun typ = u3qfu_play(van, sut, p_gen);
        u3_noun dug = u3qfu_duck(van, typ);

        u3t_push(u3nc(c3__mean, dug));
        {
          ret = _mint_in(van, sut, gol, q_gen);
        }
        u3t_drop();

        u3z(typ);
        return ret;
      }
      case c3__sggr: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun hum = _mint_in(van, sut, gol, q_gen);
        u3_noun bez;

          if ( c3y == u3ud(p_gen) ) {
            bez = u3k(p_gen);
          } else {
            bez = u3nc(u3k(u3h(p_gen)),
                               _mint_corn(van, sut, u3t(p_gen)));
          }
          ret = u3nc(
                      u3k(u3h(hum)),
                      u3nt(10, bez, u3k(u3t(hum))));

        u3z(hum);
        return ret;
      }
      case c3__zpts: p_gen = u3t(gen);
      _mint_used();
      {
        u3_noun von = u3i_molt(u3k(van), u3qfu_van_vet, c3n, 0);
        u3_noun sev = _mint_corn(von, sut, p_gen);

        u3z(von);
        return u3nc(c3__noun, u3nc(1, sev));
      }
      case c3__zpcm: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        return u3nc
          (
           _mint_nice(van,
                             gol,
                             u3qfu_play(van, sut, p_gen)),
           u3nc(1, u3k(q_gen)));
      }
      case c3__zpcb: u3x_cell(u3t(gen), &p_gen, &q_gen);
      {
        u3t_push(u3nc(c3__mean, _mint_loc(van, p_gen)));
        {
          u3_noun hum = _mint_in(van, sut, gol, q_gen);
          u3_noun bez = u3nt(c3__spot, 1, u3k(p_gen));

          ret = u3nc(u3k(u3h(hum)), u3nt(10, bez, u3k(u3t(hum))));
          u3z(hum);
        }
        u3t_drop();
        return ret;
      }
      case c3__zpcn:
      _mint_used();
      {
        u3_noun pet   = u3j_hook(u3k(van), "seed");
        u3_noun p_pet = u3h(pet);
        u3_noun q_pet = u3t(pet);
        u3_noun ret;

        ret = u3nc(_mint_nice(van, gol, u3k(p_pet)),
                           u3nc(1, u3k(q_pet)));

        u3z(pet);
        return ret;
      }
      case c3__zpsm: u3x_cell(u3t(gen), &p_gen, &q_gen);
      _mint_used();
      {
        u3_noun vos   = _mint_in(van, sut, c3__noun, q_gen);
        u3_noun zur   = u3qfu_play(van, sut, p_gen);
        u3_noun p_vos = u3h(vos);
        u3_noun q_vos = u3t(vos);
        u3_noun waz   = u3nc(1, u3k(p_vos));
        u3_noun sif   = u3k(zur);
        u3_noun cig   = u3qf_cell(sif, p_vos);
        u3_noun ret;

        ret = u3nc(
                    _mint_nice(van, gol, cig),
                    u3qf_cons(waz, q_vos));

        u3z(waz);
        u3z(zur);
        u3z(sif);
        u3z(vos);

        return ret;
      }
      case c3__zpfs: p_gen = u3t(gen);
      _mint_used();
      {
        if ( c3y == _mint_vet(van) ) {
          u3_noun zur = u3qfu_play(van, sut, p_gen);
          u3_noun dun = u3qfu_dunq(van, "lost", zur);

          u3t_push(u3nc(c3__mean, dun));
          return u3m_error("mint-lost");
        }
        else {
          return u3nt(c3__void, 0, 0);
        }
      }
      case c3__zpzp:
      _mint_used();
      {
        return u3nt(c3__void, 0, 0);
      }
    }
  }
Пример #9
0
  static u3_noun
  _crop_dext(
             u3_noun van,
             u3_noun sut,
             u3_noun ref,
             u3_noun bix)
  {
    u3_noun p_sut, q_sut, p_ref, q_ref;

    if ( c3n == u3du(ref) ) {
      switch ( ref ) {
        case c3__void: return u3k(sut);
        case c3__noun: return c3__void;
        default: return u3m_bail(c3__fail);
      }
    }
    if ( c3y == u3r_sing(sut, ref) ) {
      return c3__void;
    }
    if ( c3n == u3du(sut) ) switch ( sut ) {
      default: return u3m_bail(c3__fail);

      case c3__noun: return _crop_repo(van, sut, ref, bix);
      case c3__void: return c3__void;
    }
    else switch ( u3h(sut) ) {
      default: return u3m_bail(c3__fail);

      case c3__atom:
      {
        if ( c3__atom == u3h(ref) ) {
          return c3__void;
        }
        else if ( c3__cell == u3h(ref) ) {
          return u3k(sut);
        }
        else return _crop_sint(van, sut, ref, bix);
      }
      case c3__bull: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun foz = _crop_dext(van, q_sut, ref, bix);
        u3_noun ret = u3qf_bull(p_sut, foz);

        u3z(foz);
        return ret;
      }
      case c3__cell: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        if ( c3__atom == u3h(ref) ) {
          return u3k(sut);
        }
        else if ( c3__cell == u3h(ref) ) {
          u3x_cell(u3t(ref), &p_ref, &q_ref);

          if ( c3y == u3qfu_nest
                              (van, p_ref, c3n, p_sut) )
          {
            u3_noun foz = _crop_dext(van, q_sut, q_ref, bix);
            u3_noun ret = u3qf_cell(p_sut, foz);

            u3z(foz);
            return ret;
          }
          else return u3k(sut);
        }
        else return _crop_sint(van, sut, ref, bix);
      }
      case c3__core:
      {
        if ( (c3__atom == u3h(ref)) || (c3__cell == u3h(ref)) ) {
          return u3k(sut);
        }
        else return _crop_sint(van, sut, ref, bix);
      }
      case c3__cube: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        if ( (c3__cube == u3h(ref)) &&
             (c3y == u3r_sing(p_sut, u3h(u3t(ref)))) )
        {
          return c3__void;
        }
        else if ( (c3__atom == u3h(ref)) || (c3__cell == u3h(ref)) ) {
          u3_noun foz = _crop_dext(van, q_sut, ref, bix);
          u3_noun ret;

          if ( c3y == u3qfu_firm(van, foz, p_sut) ) {
            ret = u3qf_cube(p_sut, foz);
          }
          else ret = c3__void;

          u3z(foz);
          return ret;
        }
        else return _crop_sint(van, sut, ref, bix);
      }
      case c3__face: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun foz = _crop_dext(van, q_sut, ref, bix);
        u3_noun ret = u3qf_face(p_sut, foz);

        u3z(foz);
        return ret;
      }
      case c3__fork: u3x_cell(u3t(sut), &p_sut, &q_sut);
      {
        u3_noun dis = _crop_dext(van, p_sut, ref, bix);
        u3_noun dat = _crop_dext(van, q_sut, ref, bix);
        u3_noun ret = u3qf_fork(dis, dat);

        u3z(dis);
        u3z(dat);
        return ret;
      }
      case c3__hold: p_sut = u3t(sut);
      {
        u3_noun hud = u3nc(u3k(sut), u3k(ref));

        if ( c3y == u3qdi_has(bix, hud) ) {
#         if 0
            u3_noun dun = u3qfu_dunq(van, "type", sut);
            u3_noun niz = u3qfu_dunq(van, "over", ref);

            u3t_push(u3nc(c3__mean, dun));
            u3t_push(u3nc(c3__mean, niz));
#         endif

          return u3m_error("crop-loop");
        } else {
          u3_noun bux = u3qdi_put(bix, hud);
          u3_noun ret = _crop_repo(van, sut, ref, bux);

          u3z(hud);
          u3z(bux);
          return ret;
        }
      }
    }
  }