sptr<SymFunc> Parser::ParseFunc(bool program)
{
Types t = currToken->type;
if (program)
{
Expect(PROGRAM, -1);
}
else Expect(FUNCTION, PROCEDURE, -1);
string name = currToken->lexeme;
sptr<FuncSymType> functype(new FuncSymType(NextTable()));
NextToken();
Expect(OPENBRAC, -1);
if (!MatchSkip(CLOSEBRAC, -1))
{
do
{
functype->PushArgs(ParseVarList(functype->symTable));
} while (MatchSkip(SEMICOLON, -1));
Expect(CLOSEBRAC, -1);
}
if (t == FUNCTION)
{
Expect(COLON, -1);
functype->SetType(currSymTable->GetType(currToken->lexeme));
NextToken();
}
else
{
functype->SetType(SymType::voidType);
}
Expect(SEMICOLON, -1);
sptr<SymFunc> func(new SymFunc(name, functype, ParseBodyBlock()));
LastTable()->Push(func);
return func;
}
void
typeinit(void)
{
int i, etype, sameas;
Type *t;
Sym *s, *s1;
if(widthptr == 0)
fatal("typeinit before betypeinit");
for(i=0; i<NTYPE; i++)
simtype[i] = i;
types[TPTR32] = typ(TPTR32);
dowidth(types[TPTR32]);
types[TPTR64] = typ(TPTR64);
dowidth(types[TPTR64]);
t = typ(TUNSAFEPTR);
types[TUNSAFEPTR] = t;
t->sym = pkglookup("Pointer", unsafepkg);
t->sym->def = typenod(t);
dowidth(types[TUNSAFEPTR]);
tptr = TPTR32;
if(widthptr == 8)
tptr = TPTR64;
for(i=TINT8; i<=TUINT64; i++)
isint[i] = 1;
isint[TINT] = 1;
isint[TUINT] = 1;
isint[TUINTPTR] = 1;
isfloat[TFLOAT32] = 1;
isfloat[TFLOAT64] = 1;
iscomplex[TCOMPLEX64] = 1;
iscomplex[TCOMPLEX128] = 1;
isptr[TPTR32] = 1;
isptr[TPTR64] = 1;
isforw[TFORW] = 1;
issigned[TINT] = 1;
issigned[TINT8] = 1;
issigned[TINT16] = 1;
issigned[TINT32] = 1;
issigned[TINT64] = 1;
/*
* initialize okfor
*/
for(i=0; i<NTYPE; i++) {
if(isint[i] || i == TIDEAL) {
okforeq[i] = 1;
okforcmp[i] = 1;
okforarith[i] = 1;
okforadd[i] = 1;
okforand[i] = 1;
okforconst[i] = 1;
issimple[i] = 1;
minintval[i] = mal(sizeof(*minintval[i]));
maxintval[i] = mal(sizeof(*maxintval[i]));
}
if(isfloat[i]) {
okforeq[i] = 1;
okforcmp[i] = 1;
okforadd[i] = 1;
okforarith[i] = 1;
okforconst[i] = 1;
issimple[i] = 1;
minfltval[i] = mal(sizeof(*minfltval[i]));
maxfltval[i] = mal(sizeof(*maxfltval[i]));
}
if(iscomplex[i]) {
okforeq[i] = 1;
okforadd[i] = 1;
okforarith[i] = 1;
okforconst[i] = 1;
issimple[i] = 1;
}
}
issimple[TBOOL] = 1;
okforadd[TSTRING] = 1;
okforbool[TBOOL] = 1;
okforcap[TARRAY] = 1;
okforcap[TCHAN] = 1;
okforconst[TBOOL] = 1;
okforconst[TSTRING] = 1;
okforlen[TARRAY] = 1;
okforlen[TCHAN] = 1;
okforlen[TMAP] = 1;
okforlen[TSTRING] = 1;
okforeq[TPTR32] = 1;
okforeq[TPTR64] = 1;
okforeq[TUNSAFEPTR] = 1;
okforeq[TINTER] = 1;
okforeq[TCHAN] = 1;
okforeq[TSTRING] = 1;
okforeq[TBOOL] = 1;
okforeq[TMAP] = 1; // nil only; refined in typecheck
okforeq[TFUNC] = 1; // nil only; refined in typecheck
okforeq[TARRAY] = 1; // nil slice only; refined in typecheck
okforeq[TSTRUCT] = 1; // it's complicated; refined in typecheck
okforcmp[TSTRING] = 1;
for(i=0; i<nelem(okfor); i++)
okfor[i] = okfornone;
// binary
okfor[OADD] = okforadd;
okfor[OAND] = okforand;
okfor[OANDAND] = okforbool;
okfor[OANDNOT] = okforand;
okfor[ODIV] = okforarith;
okfor[OEQ] = okforeq;
okfor[OGE] = okforcmp;
okfor[OGT] = okforcmp;
okfor[OLE] = okforcmp;
okfor[OLT] = okforcmp;
okfor[OMOD] = okforand;
okfor[OMUL] = okforarith;
okfor[ONE] = okforeq;
okfor[OOR] = okforand;
okfor[OOROR] = okforbool;
okfor[OSUB] = okforarith;
okfor[OXOR] = okforand;
okfor[OLSH] = okforand;
okfor[ORSH] = okforand;
// unary
okfor[OCOM] = okforand;
okfor[OMINUS] = okforarith;
okfor[ONOT] = okforbool;
okfor[OPLUS] = okforarith;
// special
okfor[OCAP] = okforcap;
okfor[OLEN] = okforlen;
// comparison
iscmp[OLT] = 1;
iscmp[OGT] = 1;
iscmp[OGE] = 1;
iscmp[OLE] = 1;
iscmp[OEQ] = 1;
iscmp[ONE] = 1;
mpatofix(maxintval[TINT8], "0x7f");
mpatofix(minintval[TINT8], "-0x80");
mpatofix(maxintval[TINT16], "0x7fff");
mpatofix(minintval[TINT16], "-0x8000");
mpatofix(maxintval[TINT32], "0x7fffffff");
mpatofix(minintval[TINT32], "-0x80000000");
mpatofix(maxintval[TINT64], "0x7fffffffffffffff");
mpatofix(minintval[TINT64], "-0x8000000000000000");
mpatofix(maxintval[TUINT8], "0xff");
mpatofix(maxintval[TUINT16], "0xffff");
mpatofix(maxintval[TUINT32], "0xffffffff");
mpatofix(maxintval[TUINT64], "0xffffffffffffffff");
/* f is valid float if min < f < max. (min and max are not themselves valid.) */
mpatoflt(maxfltval[TFLOAT32], "33554431p103"); /* 2^24-1 p (127-23) + 1/2 ulp*/
mpatoflt(minfltval[TFLOAT32], "-33554431p103");
mpatoflt(maxfltval[TFLOAT64], "18014398509481983p970"); /* 2^53-1 p (1023-52) + 1/2 ulp */
mpatoflt(minfltval[TFLOAT64], "-18014398509481983p970");
maxfltval[TCOMPLEX64] = maxfltval[TFLOAT32];
minfltval[TCOMPLEX64] = minfltval[TFLOAT32];
maxfltval[TCOMPLEX128] = maxfltval[TFLOAT64];
minfltval[TCOMPLEX128] = minfltval[TFLOAT64];
/* for walk to use in error messages */
types[TFUNC] = functype(N, nil, nil);
/* types used in front end */
// types[TNIL] got set early in lexinit
types[TIDEAL] = typ(TIDEAL);
types[TINTER] = typ(TINTER);
/* simple aliases */
simtype[TMAP] = tptr;
simtype[TCHAN] = tptr;
simtype[TFUNC] = tptr;
simtype[TUNSAFEPTR] = tptr;
/* pick up the backend typedefs */
for(i=0; typedefs[i].name; i++) {
s = lookup(typedefs[i].name);
s1 = pkglookup(typedefs[i].name, builtinpkg);
etype = typedefs[i].etype;
if(etype < 0 || etype >= nelem(types))
fatal("typeinit: %s bad etype", s->name);
sameas = typedefs[i].sameas;
if(sameas < 0 || sameas >= nelem(types))
fatal("typeinit: %s bad sameas", s->name);
simtype[etype] = sameas;
minfltval[etype] = minfltval[sameas];
maxfltval[etype] = maxfltval[sameas];
minintval[etype] = minintval[sameas];
maxintval[etype] = maxintval[sameas];
t = types[etype];
if(t != T)
fatal("typeinit: %s already defined", s->name);
t = typ(etype);
t->sym = s1;
dowidth(t);
types[etype] = t;
s1->def = typenod(t);
}
Array_array = rnd(0, widthptr);
Array_nel = rnd(Array_array+widthptr, widthint);
Array_cap = rnd(Array_nel+widthint, widthint);
sizeof_Array = rnd(Array_cap+widthint, widthptr);
// string is same as slice wo the cap
sizeof_String = rnd(Array_nel+widthint, widthptr);
dowidth(types[TSTRING]);
dowidth(idealstring);
}
void
typeinit(void)
{
int i, etype, sameas;
Type *t;
Sym *s, *s1;
if(widthptr == 0)
fatal("typeinit before betypeinit");
for(i=0; i<NTYPE; i++)
simtype[i] = i;
types[TPTR32] = typ(TPTR32);
dowidth(types[TPTR32]);
types[TPTR64] = typ(TPTR64);
dowidth(types[TPTR64]);
tptr = TPTR32;
if(widthptr == 8)
tptr = TPTR64;
for(i=TINT8; i<=TUINT64; i++)
isint[i] = 1;
isint[TINT] = 1;
isint[TUINT] = 1;
isint[TUINTPTR] = 1;
for(i=TFLOAT32; i<=TFLOAT64; i++)
isfloat[i] = 1;
isfloat[TFLOAT] = 1;
isptr[TPTR32] = 1;
isptr[TPTR64] = 1;
isforw[TFORW] = 1;
issigned[TINT] = 1;
issigned[TINT8] = 1;
issigned[TINT16] = 1;
issigned[TINT32] = 1;
issigned[TINT64] = 1;
/*
* initialize okfor
*/
for(i=0; i<NTYPE; i++) {
if(isint[i] || i == TIDEAL) {
okforeq[i] = 1;
okforcmp[i] = 1;
okforarith[i] = 1;
okforadd[i] = 1;
okforand[i] = 1;
issimple[i] = 1;
minintval[i] = mal(sizeof(*minintval[i]));
maxintval[i] = mal(sizeof(*maxintval[i]));
}
if(isfloat[i]) {
okforeq[i] = 1;
okforcmp[i] = 1;
okforadd[i] = 1;
okforarith[i] = 1;
issimple[i] = 1;
minfltval[i] = mal(sizeof(*minfltval[i]));
maxfltval[i] = mal(sizeof(*maxfltval[i]));
}
}
issimple[TBOOL] = 1;
okforadd[TSTRING] = 1;
okforbool[TBOOL] = 1;
okforcap[TARRAY] = 1;
okforcap[TCHAN] = 1;
okforlen[TARRAY] = 1;
okforlen[TCHAN] = 1;
okforlen[TMAP] = 1;
okforlen[TSTRING] = 1;
okforeq[TPTR32] = 1;
okforeq[TPTR64] = 1;
okforeq[TINTER] = 1;
okforeq[TMAP] = 1;
okforeq[TCHAN] = 1;
okforeq[TFUNC] = 1;
okforeq[TSTRING] = 1;
okforeq[TBOOL] = 1;
okforeq[TARRAY] = 1; // refined in typecheck
okforcmp[TSTRING] = 1;
for(i=0; i<nelem(okfor); i++)
okfor[i] = okfornone;
// binary
okfor[OADD] = okforadd;
okfor[OAND] = okforand;
okfor[OANDAND] = okforbool;
okfor[OANDNOT] = okforand;
okfor[ODIV] = okforarith;
okfor[OEQ] = okforeq;
okfor[OGE] = okforcmp;
okfor[OGT] = okforcmp;
okfor[OLE] = okforcmp;
okfor[OLT] = okforcmp;
okfor[OMOD] = okforarith;
okfor[OMUL] = okforarith;
okfor[ONE] = okforeq;
okfor[OOR] = okforand;
okfor[OOROR] = okforbool;
okfor[OSUB] = okforarith;
okfor[OXOR] = okforand;
okfor[OLSH] = okforand;
okfor[ORSH] = okforand;
// unary
okfor[OCOM] = okforand;
okfor[OMINUS] = okforarith;
okfor[ONOT] = okforbool;
okfor[OPLUS] = okforadd;
// special
okfor[OCAP] = okforcap;
okfor[OLEN] = okforlen;
// comparison
iscmp[OLT] = 1;
iscmp[OGT] = 1;
iscmp[OGE] = 1;
iscmp[OLE] = 1;
iscmp[OEQ] = 1;
iscmp[ONE] = 1;
mpatofix(maxintval[TINT8], "0x7f");
mpatofix(minintval[TINT8], "-0x80");
mpatofix(maxintval[TINT16], "0x7fff");
mpatofix(minintval[TINT16], "-0x8000");
mpatofix(maxintval[TINT32], "0x7fffffff");
mpatofix(minintval[TINT32], "-0x80000000");
mpatofix(maxintval[TINT64], "0x7fffffffffffffff");
mpatofix(minintval[TINT64], "-0x8000000000000000");
mpatofix(maxintval[TUINT8], "0xff");
mpatofix(maxintval[TUINT16], "0xffff");
mpatofix(maxintval[TUINT32], "0xffffffff");
mpatofix(maxintval[TUINT64], "0xffffffffffffffff");
mpatoflt(maxfltval[TFLOAT32], "3.40282347e+38");
mpatoflt(minfltval[TFLOAT32], "-3.40282347e+38");
mpatoflt(maxfltval[TFLOAT64], "1.7976931348623157e+308");
mpatoflt(minfltval[TFLOAT64], "-1.7976931348623157e+308");
/* for walk to use in error messages */
types[TFUNC] = functype(N, nil, nil);
/* types used in front end */
// types[TNIL] got set early in lexinit
types[TIDEAL] = typ(TIDEAL);
/* simple aliases */
simtype[TMAP] = tptr;
simtype[TCHAN] = tptr;
simtype[TFUNC] = tptr;
/* pick up the backend typedefs */
for(i=0; typedefs[i].name; i++) {
s = lookup(typedefs[i].name);
s1 = pkglookup(typedefs[i].name, "/builtin/");
etype = typedefs[i].etype;
if(etype < 0 || etype >= nelem(types))
fatal("typeinit: %s bad etype", s->name);
sameas = typedefs[i].sameas;
if(sameas < 0 || sameas >= nelem(types))
fatal("typeinit: %s bad sameas", s->name);
simtype[etype] = sameas;
minfltval[etype] = minfltval[sameas];
maxfltval[etype] = maxfltval[sameas];
minintval[etype] = minintval[sameas];
maxintval[etype] = maxintval[sameas];
t = types[etype];
if(t != T)
fatal("typeinit: %s already defined", s->name);
t = typ(etype);
t->sym = s;
dowidth(t);
types[etype] = t;
s1->def = typenod(t);
}
Array_array = rnd(0, widthptr);
Array_nel = rnd(Array_array+widthptr, types[TUINT32]->width);
Array_cap = rnd(Array_nel+types[TUINT32]->width, types[TUINT32]->width);
sizeof_Array = rnd(Array_cap+types[TUINT32]->width, maxround);
// string is same as slice wo the cap
sizeof_String = rnd(Array_nel+types[TUINT32]->width, maxround);
dowidth(types[TSTRING]);
dowidth(idealstring);
}