/* logic
*/
u3_noun
u3qfu_repo(
u3_noun van,
u3_noun sut)
{
u3_noun p_sut, q_sut;
if ( c3n == u3du(sut) ) switch ( sut ) {
default: return u3k(sut);
case c3__noun:
return u3nt(c3__fork,
u3nc(c3__atom, u3_blip),
u3nt(c3__cell, c3__noun, c3__noun));
}
else switch ( u3h(sut) ) {
default: {
return u3m_error("repo-flat");
}
case c3__bull: {
if ( c3n == u3r_cell(u3t(sut), &p_sut, &q_sut)) {
return u3m_bail(c3__fail);
} else {
return u3k(q_sut);
}
}
case c3__core: {
if ( c3n == u3r_cell(u3t(sut), &p_sut, &q_sut) ) {
return u3m_bail(c3__fail);
} else {
return u3nt(c3__cell, c3__noun, u3k(p_sut));
}
}
case c3__cube: {
if ( c3n == u3r_cell(u3t(sut), &p_sut, &q_sut)) {
return u3m_bail(c3__fail);
} else {
return u3k(q_sut);
}
}
case c3__face: {
if ( c3n == u3r_cell(u3t(sut), &p_sut, &q_sut)) {
return u3m_bail(c3__fail);
} else {
return u3k(q_sut);
}
}
case c3__hold: {
p_sut = u3t(sut);
return u3qfu_rest(van, sut, p_sut);
}
}
}
static u3_noun
_nest_dext_in(
u3_noun van,
u3_noun sut,
u3_noun tel,
u3_noun ref,
u3_noun gil)
{
u3_noun p_sut, q_sut, p_ref, q_ref;
if ( (c3n == u3du(sut)) ) switch ( sut ) {
default: return u3m_bail(c3__fail);
case c3__noun: {
return c3y;
}
case c3__void: {
return _nest_sint(van, sut, tel, ref, gil);
}
}
else switch ( u3h(sut) ) {
default: return u3m_bail(c3__fail);
case c3__atom: {
if ( (c3y == u3du(ref)) && (c3__atom == u3h(ref)) ) {
if ( c3n == u3qf_fitz(u3t(sut), u3t(ref)) ) {
// u3_err("fitz: need", u3t(sut));
// u3_err("fitz: have", u3t(ref));
return c3n;
}
return c3y;
}
else return _nest_sint(van, sut, tel, ref, gil);
}
case c3__bull: {
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
return _nest_dext(van, q_sut, tel, ref, gil);
}
}
case c3__cell: {
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
if ( c3y == u3r_pq(ref, c3__cell, &p_ref, &q_ref) ) {
return c3a(_nest_dext(van, p_sut, tel, p_ref, gil),
_nest_dext(van, q_sut, tel, q_ref, gil));
}
else return _nest_sint(van, sut, tel, ref, gil);
}
}
case c3__core: {
if ( c3n == u3r_trel(sut, 0, &p_sut, &q_sut) ) {
return u3m_bail(c3__fail);
} else {
if ( (c3y == u3r_pq(ref, c3__core, &p_ref, &q_ref)) ) {
return _nest_cong(van, sut, tel, ref, gil);
}
else return _nest_sint(van, sut, tel, ref, gil);
}
}
case c3__cube: {
if ( c3n == u3r_trel(sut, 0, &p_sut, &q_sut) ) {
return u3m_bail(c3__fail);
} else {
if ( c3y == u3r_pq(ref, c3__cube, &p_ref, &q_ref) ) {
return u3r_sing(p_sut, p_ref);
}
else return _nest_sint(van, sut, tel, ref, gil);
}
}
case c3__face: {
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
} else {
return _nest_dext(van, q_sut, tel, ref, gil);
}
}
case c3__fork: {
if ( (c3n == u3r_trel(sut, 0, &p_sut, &q_sut)) ) {
return u3m_bail(c3__fail);
}
else {
if ( c3n == u3du(ref) ) switch ( ref ) {
default: return _nest_sint(van, sut, tel, ref, gil);
case c3__noun:
break;
}
else switch ( u3h(ref) ) {
default: return _nest_sint(van, sut, tel, ref, gil);
case c3__atom:
case c3__cell:
case c3__cube:
case c3__core:
break;
}
return c3o(_nest_dext(van, p_sut, c3n, ref, gil),
_nest_dext(van, q_sut, c3n, ref, gil));
}
}
case c3__hold: p_sut = u3t(sut);
{
u3_noun hud = u3nc(u3k(sut), u3k(ref));
if ( (c3y == u3qdi_has(gil, hud)) ) {
u3z(hud);
return c3y;
} else {
u3_noun zoc = u3qdi_put(gil, hud);
u3_noun fop = u3qfu_rest(van, sut, p_sut);
u3_noun hiv = _nest_dext(van, fop, tel, ref, zoc);
u3z(hud);
u3z(fop);
u3z(zoc);
return hiv;
}
}
}
}