ref: b88dc2174f25b7ca08a0a7bc42bf981488de54c9
dir: /parse/type.c/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "util.h"
#include "parse.h"
typedef struct Typename Typename;
struct Typename {
Ty ty;
char *name;
};
Type **tytab = NULL;
Type **types = NULL;
size_t ntypes;
Trait **traittab;
size_t ntraittab;
Node **impltab;
size_t nimpltab;
static Htab *tydeduptab;
/* Built in type constraints */
static Trait *traits[Ntypes + 1][4];
static int tybfmt(char *buf, size_t len, Bitset *visted, Type *t);
char stackness[] = {
#define Ty(t, n, stk) stk,
#include "types.def"
#undef Ty
};
int isstacktype(Type *t) { return stackness[tybase(t)->type]; }
Type *tydedup(Type *ty)
{
Type *had;
had = htget(tydeduptab, ty);
if (!had) {
htput(tydeduptab, ty, ty);
return ty;
}
/* if one is emitted, both are */
ty->isemitted = ty->isemitted || had->isemitted;
return had;
}
Type *mktype(Srcloc loc, Ty ty)
{
Type *t;
int i;
/* the first 'n' types will be identity mapped: tytab[Tyint], eg,
* will map to an instantitaion of Tyint.
*
* This is accomplished at program startup by calling mktype() on
* each builtin type in order. As we do this, we put the type into
* the table as ususal, which gives us an identity mapping.
*/
if (ty <= Tyvalist && ty < ntypes)
return types[ty];
t = zalloc(sizeof(Type));
t->type = ty;
t->tid = ntypes++;
t->loc = loc;
tytab = xrealloc(tytab, ntypes * sizeof(Type *));
tytab[t->tid] = NULL;
types = xrealloc(types, ntypes * sizeof(Type *));
types[t->tid] = t;
if (ty <= Tyvalist) /* the last builtin atomic type */
t->vis = Visbuiltin;
for (i = 0; traits[ty][i]; i++)
settrait(t, traits[ty][i]);
return t;
}
/*
* Shallowly duplicates a type, so we can frob
* its internals later
*/
Type *tydup(Type *t)
{
Type *r;
r = mktype(t->loc, t->type);
r->resolved = 0; /* re-resolving doesn't hurt */
r->fixed = 0; /* re-resolving doesn't hurt */
r->traits = bsdup(t->traits);
r->traitlist = memdup(t->traitlist, t->ntraitlist * sizeof(Node *));
r->ntraitlist = t->ntraitlist;
r->arg = memdup(t->arg, t->narg * sizeof(Type *));
r->narg = t->narg;
r->inst = memdup(t->arg, t->narg * sizeof(Type *));
r->ninst = t->ninst;
r->sub = memdup(t->sub, t->nsub * sizeof(Type *));
r->nsub = t->nsub;
r->nmemb = t->nmemb;
switch (t->type) {
case Tyname: r->name = t->name; break;
case Tyunres: r->name = t->name; break;
case Tyarray: r->asize = t->asize; break;
case Typaram: r->pname = strdup(t->pname); break;
case Tystruct: r->sdecls = memdup(t->sdecls, t->nmemb * sizeof(Node *)); break;
case Tyunion: r->udecls = memdup(t->udecls, t->nmemb * sizeof(Node *)); break;
default: break;
}
return r;
}
/*
* Creates a Tyvar with the same
* constrants as the 'like' type
*/
Type *mktylike(Srcloc loc, Ty like)
{
Type *t;
int i;
t = mktyvar(loc);
for (i = 0; traits[like][i]; i++)
settrait(t, traits[like][i]);
return t;
}
/* steals memb, funcs */
Trait *mktrait(Srcloc loc, Node *name, Type *param,
Type **aux, size_t naux,
Node **memb, size_t nmemb,
Node **funcs, size_t nfuncs,
int isproto)
{
Trait *t;
t = zalloc(sizeof(Trait));
t->uid = ntraittab++;
t->loc = loc;
if (t->uid < Ntraits)
t->vis = Visbuiltin;
t->vis = Visintern;
t->name = name;
t->param = param;
t->memb = memb;
t->nmemb = nmemb;
t->aux = aux;
t->naux = naux;
t->funcs = funcs;
t->nfuncs = nfuncs;
t->isproto = isproto;
traittab = xrealloc(traittab, ntraittab * sizeof(Trait *));
traittab[t->uid] = t;
return t;
}
Type *mktyvar(Srcloc loc)
{
Type *t;
t = mktype(loc, Tyvar);
return t;
}
Type *mktyparam(Srcloc loc, char *name)
{
Type *t;
t = mktype(loc, Typaram);
t->pname = strdup(name);
return t;
}
Type *mktyunres(Srcloc loc, Node *name, Type **arg, size_t narg)
{
Type *t;
/* resolve it in the type inference stage */
t = mktype(loc, Tyunres);
t->name = name;
t->arg = arg;
t->narg = narg;
return t;
}
Type *mktygeneric(Srcloc loc, Node *name, Type **param, size_t nparam, Type *base)
{
Type *t;
t = mktype(loc, Tygeneric);
t->name = name;
t->nsub = 1;
t->traits = bsdup(base->traits);
t->sub = xalloc(sizeof(Type *));
t->sub[0] = base;
t->gparam = param;
t->ngparam = nparam;
return t;
}
Type *mktyname(Srcloc loc, Node *name, Type *base)
{
Type *t;
t = mktype(loc, Tyname);
t->name = name;
t->nsub = 1;
t->traits = bsdup(base->traits);
t->sub = xalloc(sizeof(Type *));
t->sub[0] = base;
return t;
}
Type *mktyarray(Srcloc loc, Type *base, Node *sz)
{
Type *t;
t = mktype(loc, Tyarray);
t->nsub = 1;
t->nmemb = 1; /* the size is a "member" */
t->sub = xalloc(sizeof(Type *));
t->sub[0] = base;
t->asize = sz;
return t;
}
Type *mktyslice(Srcloc loc, Type *base)
{
Type *t;
t = mktype(loc, Tyslice);
t->nsub = 1;
t->sub = xalloc(sizeof(Type *));
t->sub[0] = base;
return t;
}
Type *mktyptr(Srcloc loc, Type *base)
{
Type *t;
t = mktype(loc, Typtr);
t->nsub = 1;
t->sub = xalloc(sizeof(Type *));
t->sub[0] = base;
return t;
}
Type *mktytuple(Srcloc loc, Type **sub, size_t nsub)
{
Type *t;
size_t i;
t = mktype(loc, Tytuple);
t->nsub = nsub;
t->sub = xalloc(nsub * sizeof(Type *));
for (i = 0; i < nsub; i++)
t->sub[i] = sub[i];
return t;
}
Type *mktyfunc(Srcloc loc, Node **args, size_t nargs, Type *ret)
{
Type *t;
size_t i;
t = mktype(loc, Tyfunc);
t->nsub = nargs + 1;
t->sub = xalloc((1 + nargs) * sizeof(Type *));
t->sub[0] = ret;
for (i = 0; i < nargs; i++)
t->sub[i + 1] = nodetype(args[i]);
return t;
}
Type *mktystruct(Srcloc loc, Node **decls, size_t ndecls)
{
Type *t;
Htab *ht;
int i;
char *s;
t = mktype(loc, Tystruct);
t->nsub = 0;
t->nmemb = ndecls;
ht = mkht(strhash, streq);
for (i = 0; i < ndecls; i++) {
s = declname(decls[i]);
if (hthas(ht, s))
fatal(decls[i], "duplicate struct member %s\n", declname(decls[i]));
htput(ht, s, s);
}
htfree(ht);
t->sdecls = memdup(decls, ndecls * sizeof(Node *));
return t;
}
Type *mktyunion(Srcloc loc, Ucon **decls, size_t ndecls)
{
Type *t;
t = mktype(loc, Tyunion);
t->nmemb = ndecls;
t->udecls = decls;
return t;
}
Ucon *finducon(Type *ty, Node *name)
{
size_t i;
ty = tybase(ty);
for (i = 0; i < ty->nmemb; i++)
if (!strcmp(namestr(ty->udecls[i]->name), namestr(name)))
return ty->udecls[i];
return NULL;
}
int istyunsigned(Type *t)
{
switch (tybase(t)->type) {
case Tybyte:
case Tyuint8:
case Tyuint16:
case Tyuint:
case Tychar:
case Tyuint32:
case Tyuint64:
case Tybool: return 1;
default: return 0;
}
}
int istysigned(Type *t)
{
switch (tybase(t)->type) {
case Tyint8:
case Tyint16:
case Tyint:
case Tyint32:
case Tyint64: return 1;
default: return 0;
}
}
int istyfloat(Type *t)
{
t = tybase(t);
return t->type == Tyflt32 || t->type == Tyflt64;
}
int istyprimitive(Type *t) { return istysigned(t) || istyunsigned(t) || istyfloat(t); }
/*
* Checks if a type contains any type
* parameers at all (ie, if it generic).
*/
int hasparamsrec(Type *t, Bitset *visited)
{
size_t i;
if (bshas(visited, t->tid))
return 0;
bsput(visited, t->tid);
switch (t->type) {
case Typaram:
case Tygeneric: return 1;
case Tyname:
for (i = 0; i < t->narg; i++)
if (hasparamsrec(t->arg[i], visited))
return 1;
return hasparamsrec(t->sub[0], visited);
case Tyunres:
for (i = 0; i < t->narg; i++)
if (hasparamsrec(t->arg[i], visited))
return 1;
break;
case Tystruct:
for (i = 0; i < t->nmemb; i++)
if (hasparamsrec(t->sdecls[i]->decl.type, visited))
return 1;
break;
case Tyunion:
for (i = 0; i < t->nmemb; i++)
if (t->udecls[i]->etype && hasparamsrec(t->udecls[i]->etype, visited))
return 1;
break;
default:
for (i = 0; i < t->nsub; i++)
if (hasparamsrec(t->sub[i], visited))
return 1;
break;
}
return 0;
}
int hasparams(Type *t)
{
Bitset *visited;
if (t->hasparams)
return 1;
visited = mkbs();
t->hasparams = hasparamsrec(t, visited);
bsfree(visited);
return t->hasparams;
}
Type *tybase(Type *t)
{
assert(t != NULL);
while (t->type == Tyname || t->type == Tygeneric)
t = t->sub[0];
return t;
}
static int namefmt(char *buf, size_t len, Node *n)
{
char *p;
char *end;
p = buf;
end = p + len;
if (n->name.ns)
p += bprintf(p, end - p, "%s.", n->name.ns);
p += bprintf(p, end - p, "%s", n->name.name);
return len - (end - p);
}
int settrait(Type *t, Trait *c)
{
if (!t->traits)
t->traits = mkbs();
bsput(t->traits, c->uid);
return 1;
}
int hastrait(Type *t, Trait *c) { return t->traits && bshas(t->traits, c->uid); }
int traitfmt(char *buf, size_t len, Type *t)
{
size_t i;
char *p;
char *end;
char *sep;
if (!t->traits || !bscount(t->traits))
return 0;
p = buf;
end = p + len;
p += bprintf(p, end - p, " :: ");
sep = "";
for (i = 0; i < ntraittab; i++) {
if (bshas(t->traits, i)) {
p += bprintf(p, end - p, "%s%s", sep, namestr(traittab[i]->name));
sep = ",";
}
}
return p - buf;
}
static int fmtstruct(char *buf, size_t len, Bitset *visited, Type *t)
{
size_t i;
char *end, *p;
char *name;
char subbuf[512];
p = buf;
end = p + len;
p += bprintf(p, end - p, "struct\n");
for (i = 0; i < t->nmemb; i++) {
name = declname(t->sdecls[i]);
tybfmt(subbuf, sizeof subbuf, visited, decltype(t->sdecls[i]));
p += bprintf(p, end - p, "\t%s:%s\n ", name, subbuf);
}
p += bprintf(p, end - p, ";;");
return p - buf;
}
static int fmtunion(char *buf, size_t len, Bitset *visited, Type *t)
{
char subbuf[512];
char *name, *ns, *sep;
char *end, *p;
size_t i;
Node *n;
p = buf;
end = p + len;
p += bprintf(p, end - p, "union\n");
for (i = 0; i < t->nmemb; i++) {
n = t->udecls[i]->name;
if (n->name.ns) {
sep = ".";
ns = n->name.ns;
} else {
sep = "";
ns = "";
}
name = n->name.name;
if (t->udecls[i]->etype) {
tybfmt(subbuf, sizeof subbuf, visited, t->udecls[i]->etype);
p += bprintf(p, end - p, "\t`%s%s%s %s\n", ns, sep, name, subbuf);
} else {
p += bprintf(p, end - p, "\t`%s%s%s\n", ns, sep, name);
}
}
p += bprintf(p, end - p, ";;");
return p - buf;
}
static int fmtlist(char *buf, size_t len, Bitset *visited, Type **arg, size_t narg)
{
char *end, *p, *sep;
size_t i;
sep = "";
p = buf;
end = p + len;
p += bprintf(p, end - p, "(");
for (i = 0; i < narg; i++) {
p += bprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, visited, arg[i]);
sep = ", ";
}
p += bprintf(p, end - p, ")");
return p - buf;
}
static int tybfmt(char *buf, size_t len, Bitset *visited, Type *t)
{
size_t i;
char *p;
char *end;
char *sep;
if (t)
t = tysearch(t);
sep = "";
p = buf;
end = p + len;
if (!t) {
p += bprintf(p, end - p, "tynil");
return len - (end - p);
}
if (bshas(visited, t->tid)) {
p += bprintf(buf, len, "<...>");
return len - (end - p);
}
bsput(visited, t->tid);
switch (t->type) {
case Tybad: p += bprintf(p, end - p, "BAD"); break;
case Tyvoid: p += bprintf(p, end - p, "void"); break;
case Tybool: p += bprintf(p, end - p, "bool"); break;
case Tychar: p += bprintf(p, end - p, "char"); break;
case Tyint8: p += bprintf(p, end - p, "int8"); break;
case Tyint16: p += bprintf(p, end - p, "int16"); break;
case Tyint: p += bprintf(p, end - p, "int"); break;
case Tyint32: p += bprintf(p, end - p, "int32"); break;
case Tyint64: p += bprintf(p, end - p, "int64"); break;
case Tybyte: p += bprintf(p, end - p, "byte"); break;
case Tyuint8: p += bprintf(p, end - p, "uint8"); break;
case Tyuint16: p += bprintf(p, end - p, "uint16"); break;
case Tyuint: p += bprintf(p, end - p, "uint"); break;
case Tyuint32: p += bprintf(p, end - p, "uint32"); break;
case Tyuint64: p += bprintf(p, end - p, "uint64"); break;
case Tyflt32: p += bprintf(p, end - p, "flt32"); break;
case Tyflt64: p += bprintf(p, end - p, "flt64"); break;
case Tyvalist: p += bprintf(p, end - p, "..."); break;
case Tyvar: p += bprintf(p, end - p, "$%d", t->tid); break;
case Typtr:
p += tybfmt(p, end - p, visited, t->sub[0]);
p += bprintf(p, end - p, "#");
break;
case Tyslice:
p += tybfmt(p, end - p, visited, t->sub[0]);
p += bprintf(p, end - p, "[:]");
break;
case Tyarray:
p += tybfmt(p, end - p, visited, t->sub[0]);
if (t->asize) {
i = t->asize->expr.args[0]->lit.intval;
p += bprintf(p, end - p, "[%zd]", i);
} else {
p += bprintf(p, end - p, "[]");
}
break;
case Tycode:
case Tyfunc:
p += bprintf(p, end - p, "(");
for (i = 1; i < t->nsub; i++) {
p += bprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, visited, t->sub[i]);
sep = ", ";
}
p += bprintf(p, end - p, " -> ");
p += tybfmt(p, end - p, visited, t->sub[0]);
p += bprintf(p, end - p, ")");
break;
case Tytuple:
p += bprintf(p, end - p, "(");
for (i = 0; i < t->nsub; i++) {
p += bprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, visited, t->sub[i]);
sep = ",";
}
p += bprintf(p, end - p, ")");
break;
case Typaram: p += bprintf(p, end - p, "@%s", t->pname); break;
case Tyunres:
p += namefmt(p, end - p, t->name);
if (t->narg)
p += fmtlist(p, end - p, visited, t->arg, t->narg);
break;
case Tyname:
if (t->name->name.ns)
p += bprintf(p, end - p, "%s.", t->name->name.ns);
p += bprintf(p, end - p, "%s", namestr(t->name));
if (t->narg)
p += fmtlist(p, end - p, visited, t->arg, t->narg);
break;
case Tygeneric:
if (t->name->name.ns)
p += bprintf(p, end - p, "%s.", t->name->name.ns);
p += bprintf(p, end - p, "%s", namestr(t->name));
if (t->ngparam)
p += fmtlist(p, end - p, visited, t->gparam, t->ngparam);
break;
case Tystruct: p += fmtstruct(p, end - p, visited, t); break;
case Tyunion: p += fmtunion(p, end - p, visited, t); break;
case Ntypes: die("Ntypes is not a type"); break;
}
/* we only show constraints on non-builtin typaram */
if (t->type == Tyvar || t->type == Typaram)
p += traitfmt(p, end - p, t);
bsdel(visited, t->tid);
return p - buf;
}
char *tyfmt(char *buf, size_t len, Type *t)
{
Bitset *bs;
bs = mkbs();
tybfmt(buf, len, bs, t);
bsfree(bs);
return buf;
}
char *traitstr(Type *t)
{
char buf[1024];
traitfmt(buf, 1024, t);
return strdup(buf);
}
char *tystr(Type *t)
{
char buf[1024];
tyfmt(buf, 1024, t);
return strdup(buf);
}
ulong tyhash(void *ty)
{
size_t i;
Type *t;
ulong hash;
t = (Type *)ty;
switch (t->type) {
case Tyvar: hash = inthash(t->tid); break;
case Typaram: hash = strhash(t->pname); break;
case Tyunion: hash = inthash(t->type); break;
case Tystruct: hash = inthash(t->type); break;
case Tyname: hash = namehash(t->name); break;
default: hash = inthash(t->type); break;
}
for (i = 0; i < t->narg; i++)
hash ^= tyhash(t->arg[i]);
return hash;
}
int tyeq_rec(Type *a, Type *b, Bitset *visited, int search)
{
size_t i;
if (!a || !b)
return a == b;
if (search) {
a = tysearch(a);
b = tysearch(b);
}
if (a->type != b->type)
return 0;
if (a->narg != b->narg)
return 0;
if (a->nsub != b->nsub)
return 0;
if (a->nmemb != b->nmemb)
return 0;
if (a->tid == b->tid)
return 1;
if (bshas(visited, a->tid) || bshas(visited, b->tid))
return 1;
bsput(visited, a->tid);
bsput(visited, b->tid);
switch (a->type) {
case Typaram:
return streq(a->pname, b->pname);
break;
case Tyvar:
if (a->tid != b->tid)
return 0;
break;
case Tyunres:
if (!nameeq(a->name, b->name))
return 0;
case Tyunion:
for (i = 0; i < a->nmemb; i++) {
if (!nameeq(a->udecls[i]->name, b->udecls[i]->name))
return 0;
if (!tyeq_rec(a->udecls[i]->etype, b->udecls[i]->etype, visited, search))
return 0;
}
break;
case Tystruct:
for (i = 0; i < a->nmemb; i++) {
if (strcmp(declname(a->sdecls[i]), declname(b->sdecls[i])) != 0)
return 0;
if (!tyeq_rec(decltype(a->sdecls[i]), decltype(b->sdecls[i]), visited, search))
return 0;
}
break;
case Tyname:
if (!nameeq(a->name, b->name))
return 0;
for (i = 0; i < a->narg; i++)
if (!tyeq_rec(a->arg[i], b->arg[i], visited, search))
return 0;
for (i = 0; i < a->nsub; i++)
if (!tyeq_rec(a->sub[i], b->sub[i], visited, search))
return 0;
break;
case Tyarray:
if (arraysz(a->asize) != arraysz(b->asize))
return 0;
break;
default: break;
}
for (i = 0; i < a->nsub; i++)
if (!tyeq_rec(a->sub[i], b->sub[i], visited, search))
return 0;
return 1;
}
int tystricteq(void *a, void *b)
{
Bitset *bs;
int eq;
if (a == b)
return 1;
bs = mkbs();
eq = tyeq_rec(a, b, bs, 0);
bsfree(bs);
return eq;
}
int tyeq(void *a, void *b)
{
Bitset *bs;
int eq;
if (a == b)
return 1;
bs = mkbs();
eq = tyeq_rec(a, b, bs, 1);
bsfree(bs);
return eq;
}
size_t tyidfmt(char *buf, size_t sz, Type *ty)
{
size_t i;
char *p, *end;
ty = tysearch(ty);
p = buf;
end = buf + sz;
switch (ty->type) {
case Ntypes:
case Tybad: die("invalid type"); break;
case Tyvar: die("tyvar has no idstr"); break;
case Tyvoid: p += bprintf(p, end - p, "v"); break;
case Tychar: p += bprintf(p, end - p, "c"); break;
case Tybool: p += bprintf(p, end - p, "t"); break;
case Tyint8: p += bprintf(p, end - p, "b"); break;
case Tyint16: p += bprintf(p, end - p, "s"); break;
case Tyint: p += bprintf(p, end - p, "i"); break;
case Tyint32: p += bprintf(p, end - p, "w"); break;
case Tyint64: p += bprintf(p, end - p, "q"); break;
case Tybyte: p += bprintf(p, end - p, "H"); break;
case Tyuint8: p += bprintf(p, end - p, "B"); break;
case Tyuint16: p += bprintf(p, end - p, "S"); break;
case Tyuint: p += bprintf(p, end - p, "I"); break;
case Tyuint32: p += bprintf(p, end - p, "W"); break;
case Tyuint64: p += bprintf(p, end - p, "Q"); break;
case Tyflt32: p += bprintf(p, end - p, "f"); break;
case Tyflt64: p += bprintf(p, end - p, "d"); break;
case Tyvalist: p += bprintf(p, end - p, "V"); break;
case Typtr:
p += bprintf(p, end - p, "$p");
p += tyidfmt(p, end - p, ty->sub[0]);
break;
case Tyarray:
p += bprintf(p, end - p, "$a%lld", (vlong)arraysz(ty->asize));
p += tyidfmt(p, end - p, ty->sub[0]);
break;
case Tyslice:
p += bprintf(p, end - p, "$s");
p += tyidfmt(p, end - p, ty->sub[0]);
break;
case Tycode:
p += bprintf(p, end - p, "$F");
for (i = 0; i < ty->nsub; i++) {
p += tyidfmt(p, end - p, ty->sub[i]);
p += bprintf(p, end - p, "$");
}
break;
case Tyfunc:
p += bprintf(p, end - p, "$f");
for (i = 0; i < ty->nsub; i++) {
p += tyidfmt(p, end - p, ty->sub[i]);
p += bprintf(p, end - p, "$");
}
break;
case Tytuple:
p += bprintf(p, end - p, "$e");
for (i = 0; i < ty->nsub; i++) {
p += tyidfmt(p, end - p, ty->sub[i]);
}
p += bprintf(p, end - p, "$");
break;
case Tystruct: p += bprintf(p, end - p, "$t%lld", ty->tid); break;
case Tyunion: p += bprintf(p, end - p, "$u%lld", ty->tid); break;
case Typaram: p += bprintf(p, end - p, "$r%s", ty->pname); break;
case Tyunres:
case Tyname:
p += bprintf(p, end - p, "$n");
if (ty->name->name.ns)
p += bprintf(p, end - p, "%s", ty->name->name.ns);
p += bprintf(p, end - p, "$%s", ty->name->name.name);
if (ty->arg)
for (i = 0; i < ty->narg; i++)
p += tyidfmt(p, end - p, ty->arg[i]);
else if (ty->gparam)
for (i = 0; i < ty->ngparam; i++)
p += tyidfmt(p, end - p, ty->gparam[i]);
break;
case Tygeneric:
break;
}
return p - buf;
}
void iterableinit(Stab *st, Trait *tr)
{
Node *func, *arg, **args;
Type *ty;
size_t nargs;
/* trait iter @a -> @b = ... */
tr->param = mktyparam(Zloc, "a");
tr->aux = malloc(sizeof(Type*));
tr->aux[0] = mktyparam(Zloc, "b");
tr->naux = 1;
/* __iternext__ : (it : @a#, outval : @b# -> bool) */
args = NULL;
nargs = 0;
arg = mkdecl(Zloc, mkname(Zloc, "iter"), mktyptr(Zloc, mktyparam(Zloc, "a")));
lappend(&args, &nargs, arg);
arg = mkdecl(Zloc, mkname(Zloc, "ret"), mktyptr(Zloc, mktyparam(Zloc, "b")));
lappend(&args, &nargs, arg);
ty = mktyfunc(Zloc, args, nargs, mktype(Zloc, Tybool));
func = mkdecl(Zloc, mkname(Zloc, "__iternext__"), ty);
func->decl.trait = tr;
func->decl.impls = mkht(tyhash, tyeq);
func->decl.isgeneric = 1;
func->decl.isconst = 1;
func->decl.isglobl = 1;
func->decl.isextern = 1;
lappend(&tr->funcs, &tr->nfuncs, func);
putdcl(st, func);
/* __iterfin__ : (it : @a#, outval : @b# -> void) */
args = NULL;
nargs = 0;
arg = mkdecl(Zloc, mkname(Zloc, "iter"), mktyptr(Zloc, mktyparam(Zloc, "a")));
lappend(&args, &nargs, arg);
arg = mkdecl(Zloc, mkname(Zloc, "val"), mktyptr(Zloc, mktyparam(Zloc, "b")));
lappend(&args, &nargs, arg);
ty = mktyfunc(Zloc, args, nargs, mktype(Zloc, Tyvoid));
func = mkdecl(Zloc, mkname(Zloc, "__iterfin__"), ty);
func->decl.trait = tr;
func->decl.impls = mkht(tyhash, tyeq);
func->decl.isgeneric = 1;
func->decl.isconst = 1;
func->decl.isglobl = 1;
func->decl.isextern = 1;
lappend(&tr->funcs, &tr->nfuncs, func);
putdcl(st, func);
}
void tyinit(Stab *st)
{
int i;
Type *ty;
Trait *tr;
tydeduptab = mkht(tyhash, tystricteq);
/* this must be done after all the types are created, otherwise we will
* clobber the memoized bunch of types with the type params. */
#define Tc(c, n) \
tr = mktrait(Zloc, \
mkname(Zloc, n), NULL, \
NULL, 0, \
NULL, 0, \
NULL, 0, \
0); \
puttrait(st, tr->name, tr);
#include "trait.def"
#undef Tc
/* char::(numeric,integral) */
traits[Tychar][0] = traittab[Tcnum];
traits[Tychar][1] = traittab[Tcint];
traits[Tybyte][0] = traittab[Tcnum];
traits[Tybyte][1] = traittab[Tcint];
/* <integer types>::(numeric,integral) */
for (i = Tyint8; i < Tyflt32; i++) {
traits[i][0] = traittab[Tcnum];
traits[i][1] = traittab[Tcint];
}
/* <floats>::(numeric,floating) */
traits[Tyflt32][0] = traittab[Tcnum];
traits[Tyflt32][1] = traittab[Tcfloat];
traits[Tyflt64][0] = traittab[Tcnum];
traits[Tyflt64][1] = traittab[Tcfloat];
/* @a*::(sliceable) */
traits[Typtr][0] = traittab[Tcslice];
/* @a[:]::(indexable,sliceable) */
traits[Tyslice][0] = traittab[Tcidx];
traits[Tyslice][1] = traittab[Tcslice];
traits[Tyslice][2] = traittab[Tciter];
/* @a[SZ]::(indexable,sliceable) */
traits[Tyarray][0] = traittab[Tcidx];
traits[Tyarray][1] = traittab[Tcslice];
traits[Tyarray][2] = traittab[Tciter];
/* @a::function */
traits[Tyfunc][0] = traittab[Tcfunc];
/* Definining and registering the types has to go after we define the
* constraints, otherwise they will have no constraints set on them. */
#define Ty(t, n, stk) \
if (t != Ntypes) { \
ty = mktype(Zloc, t); \
if (n) { \
puttype(st, mkname(Zloc, n), ty); \
htput(tydeduptab, ty, ty); \
} \
}
#include "types.def"
#undef Ty
/*
* finally, initializing the builtin traits for use in user code
* comes last, since this needs both the types and the traits set up
*/
iterableinit(st, traittab[Tciter]);
}