/* parse.c 610a */
static XDef parse(Par p) {
switch (p->alt) {
case ATOM:
/* parse [[atom]] and return the result 610b */
return mkDef(mkExp(parseexp(p)));
case LIST:
/* parse [[list]] and return the result 610c */
{
Name first;
Parlist pl = p->u.list;
if (pl == NULL)
error("%p: empty list", p);
if (nthPL(pl, 0)->alt != ATOM)
error("%p: first item of list not name", p);
first = nthPL(pl, 0)->u.atom;
if (first == strtoname("define")) {
/* parse [[define]] and return the result 611b */
if (lengthPL(pl) != 4 || nthPL(pl, 1)->alt != ATOM || nthPL(pl,
2)->alt != LIST)
error("%p: usage: (define fun (formals) body)", p);
{
Name name = nthPL(pl, 1)->u.atom;
Namelist formals = getnamelist(name, p, nthPL(pl, 2)->u.list);
Exp body = parseexp(nthPL(pl, 3));
return mkDef(mkDefine(name, mkUserfun(formals, body)));
}
}
if (first == strtoname("val")) {
/* parse [[val]] and return the result 611c */
Exp var, exp;
if (lengthPL(pl) != 3)
error("%p: usage: (val var exp)", p);
var = parseexp(nthPL(pl, 1));
if (var->alt != VAR)
error("%p: usage: (val var exp) (bad variable)", p);
exp = parseexp(nthPL(pl, 2));
return mkDef(mkVal(var->u.var, exp));
}
if (first == strtoname("use")) {
/* parse [[use]] and return the result 611d */
if (lengthPL(pl) != 2 || nthPL(pl, 1)->alt != ATOM)
error("%p: usage: (use filename)", p);
return mkUse(nthPL(pl, 1)->u.atom);
}
if (first == strtoname("check-expect")) {
/* parse [[check-expect]] and return the result 611e */
Exp check, expect;
if (lengthPL(pl) != 3)
error("%p: usage: (check-expect exp exp)", p);
check = parseexp(nthPL(pl, 1));
expect = parseexp(nthPL(pl, 2));
return mkTest(mkCheckExpect(check, expect));
}
if (first == strtoname("check-error")) {
/* parse [[check-error]] and return the result 612a */
Exp check;
if (lengthPL(pl) != 2)
error("%p: usage: (check-error exp)", p);
check = parseexp(nthPL(pl, 1));
return mkTest(mkCheckError(check));
}
return mkDef(mkExp(parseexp(p)));
}
}
assert(0);
return NULL;
}
/* parse.c 718b */
XDef parse(Par p) {
switch (p->alt) {
case ATOM:
/* parse ATOM and return 718c */
return mkDef(mkExp(parseexp(p)));
case LIST:
/* parse LIST and return 718d */
{
Parlist pl = p->u.list;
if (pl == NULL)
error("%p: empty list", p);
if (nthPL(pl, 0)->alt == ATOM) {
Name first = nthPL(pl, 0)->u.atom;
if (first == strtoname("define")) {
/* parse define and return 719a */
Name name;
Lambda l;
if (lengthPL(pl) != 4 || nthPL(pl, 1)->alt != ATOM || nthPL(
pl, 2)->alt != LIST)
error("%p: usage: (define fun (args) body)", p);
name = nthPL(pl, 1)->u.atom;
l.formals = getnamelist(p, nthPL(pl, 2)->u.list);
l.body = parseexp(nthPL(pl, 3));
return mkDef(mkDefine(name, l));
}
if (first == strtoname("val")) {
/* parse val and return 719b */
Exp var, exp;
if (lengthPL(pl) != 3)
error("%p: usage: (val var exp)", p);
var = parseexp(nthPL(pl, 1));
if (var->alt != VAR)
error("%p: usage: (val var exp) (bad variable)", p);
exp = parseexp(nthPL(pl, 2));
return mkDef(mkVal(var->u.var, exp));
}
if (first == strtoname("use")) {
/* parse use and return 719c */
if (lengthPL(pl) != 2 || nthPL(pl, 1)->alt != ATOM)
error("%p: usage: (use filename)", p);
return mkUse(nthPL(pl, 1)->u.atom);
}
if (first == strtoname("check-expect")) {
/* parse check-expect and return 719d */
{
Exp check, expect;
if (lengthPL(pl) != 3)
error("%p: usage: (check-expect exp exp)", p);
check = parseexp(nthPL(pl, 1));
expect = parseexp(nthPL(pl, 2));
return mkTest(mkCheckExpect(check, expect));
}
}
if (first == strtoname("check-error")) {
/* parse check-error and return 719e */
{
Exp check;
if (lengthPL(pl) != 2)
error("%p: usage: (check-error exp)", p);
check = parseexp(nthPL(pl, 1));
return mkTest(mkCheckError(check));
}
}
}
return mkDef(mkExp(parseexp(p)));
}
}
assert(0);
return NULL;
}