/* _flay_main(): flay, with loop control.
*/
static u4_type
_flay_main(u4_milr m,
u4_bag hed,
u4_type naf)
{
u4_noun p_naf, q_naf;
if ( u4_n_atom(naf)
|| u4_b_p(naf, u4_atom_cube, 0)
|| u4_b_pq(naf, u4_atom_bone, &p_naf, &q_naf)
|| u4_b_pq(naf, u4_atom_cone, &p_naf, &q_naf)
|| u4_b_pq(naf, u4_atom_pair, &p_naf, &q_naf) )
{
return naf;
}
else if ( u4_b_pq(naf, u4_atom_fork, &p_naf, &q_naf) ) {
return _mill_eith(m, _flay_main(m, hed, p_naf),
_flay_main(m, hed, q_naf));
}
else if ( u4_b_pq(naf, u4_atom_fuse, &p_naf, &q_naf) ) {
return _mill_both(m, _flay_main(m, hed, p_naf),
_flay_main(m, hed, q_naf));
}
else if ( u4_b_pq(naf, u4_atom_post, &p_naf, &q_naf) ) {
if ( u4_bag_in(naf, hed) ) {
return naf;
}
else {
hed = u4_bag_add(m->lane, naf, hed);
{
u4_type tey = _mill_repo(m, p_naf, q_naf);
u4_type mal = _flay_main(m, hed, tey);
return (u4_n_eq(tey, mal) ? naf : mal);
}
}
}
else {
return _flay_main(m, hed, _mill_reap(m, naf));
}
}
/* _mill_safe_in(): check type, with recursion control.
*/
u4_t
_mill_safe_in(u4_milr m,
u4_bag gil,
u4_type naf,
u4_gene dug)
{
u4_lane lane = m->lane;
u4_noun fid = u4_k_cell(lane, naf, dug);
/* Memoization. Can we do this without gil? Yes.
*/
{
if ( u4_bag_in(fid, m->tyx) ) {
return 1;
}
else {
u4_t t = _safe_loop(m, gil, naf, dug);
u4_assert(t);
m->tyx = u4_bag_add(lane, fid, m->tyx);
return 1;
}
}
}
/* _mill_repo(): replay load.
*/
u4_type
_mill_repo(u4_milr m,
u4_type tip,
u4_gene gen)
{
u4_lane lane = m->lane;
u4_noun fad = u4_k_cell(lane, tip, gen);
u4_noun fan;
u4_type pol;
if ( u4_bag_in(fad, m->fan) ) {
// printf("inference recursion\n");
// abort();
return _mill_fail(m, "repo: inference recursion");
}
fan = m->fan;
m->fan = u4_bag_add(lane, fad, m->fan);
pol = _mill_play(m, gen, tip);
m->fan = fan;
return pol;
}
/* _safe_loop(): check type, inside memoization.
*/
static u4_t
_safe_loop(u4_milr m,
u4_bag gil,
u4_type naf,
u4_gene dug)
{
u4_lane lane = m->lane;
/* Recursion control.
*/
{
u4_noun mel = u4_k_cell(lane, naf, dug);
if ( u4_bag_in(mel, gil) ) {
/* Conservative search.
*/
return 1;
}
else {
gil = u4_bag_add(lane, mel, gil);
}
}
/* Core semantics.
*/
{
u4_noun p_dug, q_dug, r_dug;
if ( u4_b_fork(dug, &p_dug, &q_dug) ) {
return _mill_safe_in(m, gil, naf, p_dug) &&
_mill_safe_in(m, gil, naf, q_dug);
}
else if ( u4_b_pq(dug, u4_atom_bend, &p_dug, &q_dug) ) {
return _mill_suss(m, gil, naf, p_dug, q_dug);
}
else if ( u4_b_pq(dug, u4_atom_cast, &p_dug, &q_dug) ) {
if ( !_mill_safe_in(m, gil, naf, p_dug) ||
!_mill_safe_in(m, gil, naf, q_dug) )
{
return 0;
}
else {
u4_type lup = _mill_play(m, naf, p_dug);
u4_type tog = _mill_play(m, naf, q_dug);
if ( !_mill_cong(m, lup, tog) ) {
// u4_burp(lane, "cast: lup", _mill_dump(m, lup));
// u4_burp(lane, "cast: tog", _mill_dump(m, tog));
_mill_fail(m, "cast infraction");
return 0;
}
return 1;
}
}
else if ( u4_b_pq(dug, u4_atom_coat, &p_dug, &q_dug) ) {
return _mill_safe_in(m, gil, naf, q_dug);
}
else if ( u4_b_p(dug, u4_atom_dbug, &p_dug) ) {
u4_t gaf;
m->rux = u4_op_inc(lane, m->rux);
gaf = _mill_safe_in(m, gil, naf, p_dug);
m->rux = u4_op_dec(lane, m->rux);
return gaf;
}
else if ( u4_b_pqr(dug, u4_atom_if, &p_dug, &q_dug, &r_dug) ) {
if ( !_mill_safe_in(m, gil, naf, p_dug) ) {
return 0;
}
else {
u4_type lag = _mill_play(m, naf, p_dug);
if ( !_mill_cong(m, _flag(lane), lag) ) {
return _mill_fail(m, "if abuse");
}
else {
u4_loaf ruf = _mill_hunt(m, naf, p_dug);
u4_type sec = u4_ch(ruf);
u4_form nak = u4_ct(ruf);
if ( u4_n_eq(u4_noun_1, u4_ch(nak)) ) {
if ( u4_n_eq(u4_noun_0, u4_ct(nak)) ) {
return _mill_safe_in(m, gil, naf, q_dug);
} else {
return _mill_safe_in(m, gil, naf, r_dug);
}
}
else {
return _mill_safe_in(m, gil, _mill_both(m, sec, naf), q_dug) &&
_mill_safe_in(m, gil, naf, r_dug);
}
}
}
}
else if ( u4_b_pq(dug, u4_atom_like, &p_dug, &q_dug) ) {
if ( !_mill_safe_in(m, gil, naf, p_dug) ||
!_mill_safe_in(m, gil, naf, q_dug) )
{
return 0;
}
else {
#if 0
u4_type fez = _mill_play(m, naf, p_dug);
u4_type gar = _mill_play(m, naf, q_dug);
if ( !_mill_cong(m, fez, gar) && !_mill_orth(m, fez, gar) ) {
_mill_fail(m, "like confusion");
return 0;
}
#endif
return 1;
}
}
else if ( u4_b_p(dug, u4_atom_limb, &p_dug) ) {
return 1;
}
else if ( u4_b_pq(dug, u4_atom_link, &p_dug, &q_dug)) {
if ( !_mill_safe_in(m, gil, naf, p_dug) ) {
return 0;
}
else return _mill_safe_in(m, gil, _mill_play(m, naf, p_dug), q_dug);
}
else if ( u4_b_p(dug, u4_atom_load, &p_dug) ) {
u4_type roz = u4_k_trel(lane, u4_atom_cone, naf, p_dug);
return _main_load(m, gil, roz, p_dug);
}
else if (u4_b_pq(dug, u4_atom_look, &p_dug, &q_dug) ) {
return _mill_peek(m, gil, naf, p_dug, q_dug);
}
else if ( u4_b_pq(dug, u4_atom_raw, &p_dug, &q_dug) ) {
if ( !_mill_safe_in(m, gil, naf, q_dug) ) {
return 0;
}
else {
if ( u4_n_eq(u4_noun_3, p_dug) || u4_n_eq(u4_noun_4, p_dug) ) {
return 1;
}
else if ( u4_n_eq(u4_noun_5, p_dug) ) {
u4_type poz = _mill_play(m, naf, q_dug);
if ( !_mill_cong(m, u4_atom_atom, poz) ) {
return _mill_fail(m, "raw bump");
}
else return 1;
}
else if ( u4_n_eq(u4_noun_6, p_dug) ) {
u4_type lem = u4_k_trel
(lane, u4_atom_pair, u4_atom_blur, u4_atom_blur);
u4_type poz = _mill_play(m, naf, q_dug);
if ( !_mill_cong(m, lem, poz) ) {
return _mill_fail(m, "raw same");
}
else return 1;
}
else return u4_trip;
}
}
else if ( u4_b_p(dug, u4_atom_rock, &p_dug) ) {
return 1;
}
else if ( u4_b_pq(dug, u4_atom_site, &p_dug, &q_dug) ) {
u4_noun fob = m->zud;
u4_t gaf;
m->zud = p_dug;
gaf = _mill_safe_in(m, gil, naf, q_dug);
m->zud = fob;
return gaf;
}
else if ( u4_b_pq(dug, u4_atom_spot, &p_dug, &q_dug) ) {
u4_noun fob = m->nix;
u4_t gaf;
m->nix = p_dug;
gaf = _mill_safe_in(m, gil, naf, q_dug);
m->nix = fob;
return gaf;
}
else if ( u4_b_pqr(dug, u4_atom_sure, &p_dug, &q_dug, &r_dug) ) {
if ( !_mill_safe_in(m, gil, naf, p_dug) ||
!_mill_safe_in(m, gil, naf, q_dug) )
{
return 0;
}
else {
u4_type lop = _mill_play(m, naf, p_dug);
u4_type huq = _mill_play(m, naf, q_dug);
if ( !_mill_cong(m, huq, lop) ) {
return _mill_fail(m, "sure violation");
}
else {
return _mill_safe_in(m, gil, naf, r_dug);
}
}
}
else {
return _mill_safe_in(m, gil, naf, _mill_open(m, dug));
}
}
}
/* _seal_main(): as _mill_seal(), with gil.
*/
static u4_loaf
_seal_main(u4_milr m,
u4_bag gil,
u4_mold typ)
{
u4_lane lane = m->lane;
u4_noun p_typ, q_typ;
// %atom
// %blur
//
if ( u4_n_eq(u4_atom_atom, typ) ||
u4_n_eq(u4_atom_blur, typ) ||
u4_n_eq(u4_atom_blot, typ) )
{
return u4_noun_0;
}
// [%cell p=mold q=mold]
//
else if ( u4_b_pq(typ, u4_atom_cell, &p_typ, &q_typ) ) {
return u4_bag_cat(lane, _seal_main(m, gil, p_typ),
_seal_main(m, gil, q_typ));
}
// [%mono p=mold q=bush+[mark mold]]
//
else if ( u4_b_pq(typ, u4_atom_mono, &p_typ, &q_typ) ||
u4_b_pq(typ, u4_atom_poly, &p_typ, &q_typ) ) {
return _seal_main(m, gil, p_typ);
}
// [%cube p=noun]
//
else if ( u4_b_p(typ, u4_atom_cube, &p_typ) ) {
return u4_noun_0;
}
// [%face p=mark q=mold]
//
else if ( u4_b_pq(typ, u4_atom_face, &p_typ, &q_typ) ) {
return _seal_main(m, gil, q_typ);
}
// [%fork p=mold q=mold]
//
else if ( u4_b_pq(typ, u4_atom_fork, &p_typ, &q_typ) ) {
return u4_bag_cat(lane, _seal_main(m, gil, p_typ),
_seal_main(m, gil, q_typ));
}
// [%fuse p=mold q=mold]
//
else if ( u4_b_pq(typ, u4_atom_fuse, &p_typ, &q_typ) ) {
return u4_bag_cat(lane, _seal_main(m, gil, p_typ),
_seal_main(m, gil, q_typ));
}
// [%hold p=mold q=gene]
//
else if ( u4_b_pq(typ, u4_atom_hold, &p_typ, &q_typ) ) {
if ( u4_bag_in(typ, gil) ) {
return u4_k_trel(lane, typ, u4_noun_0, u4_noun_0);
}
else {
return _seal_main
(m, u4_bag_add(lane, typ, gil),
_mill_repo(m, p_typ, q_typ));
}
}
else {
u4_bug("strange mold", typ);
return u4_trip;
}
}