ref: 4a95d9e52e8cb216f9ba963096097b4906aa49f0
dir: /parse/type.c/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.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 "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;
/* Built in type constraints */
static Trait *traits[Ntypes + 1][4];
Type *mktype(int line, 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->line = line;
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->line, 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(int line, Ty like)
{
Type *t;
int i;
t = mktyvar(line);
for (i = 0; traits[like][i]; i++)
settrait(t, traits[like][i]);
return t;
}
/* steals memb, funcs */
Trait *mktrait(int line, Node *name, Type *param, Node **memb, size_t nmemb, Node **funcs, size_t nfuncs, int isproto)
{
Trait *t;
t = zalloc(sizeof(Trait));
t->vis = Visintern;
t->name = name;
t->param = param;
t->memb = memb;
t->nmemb = nmemb;
t->funcs = funcs;
t->nfuncs = nfuncs;
t->isproto = isproto;
t->uid = ntraittab++;
traittab = xrealloc(traittab, ntraittab*sizeof(Trait*));
traittab[t->uid] = t;
return t;
}
Type *mktyvar(int line)
{
Type *t;
t = mktype(line, Tyvar);
return t;
}
Type *mktyparam(int line, char *name)
{
Type *t;
t = mktype(line, Typaram);
t->pname = strdup(name);
return t;
}
Type *mktyunres(int line, Node *name, Type **arg, size_t narg)
{
Type *t;
/* resolve it in the type inference stage */
t = mktype(line, Tyunres);
t->name = name;
t->arg = arg;
t->narg = narg;
return t;
}
Type *mktyname(int line, Node *name, Type **param, size_t nparam, Type *base)
{
Type *t;
t = mktype(line, Tyname);
t->name = name;
t->nsub = 1;
t->traits = bsdup(base->traits);
t->sub = xalloc(sizeof(Type*));
t->sub[0] = base;
t->param = param;
t->nparam = nparam;
return t;
}
Type *mktyarray(int line, Type *base, Node *sz)
{
Type *t;
t = mktype(line, 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(int line, Type *base)
{
Type *t;
t = mktype(line, Tyslice);
t->nsub = 1;
t->sub = xalloc(sizeof(Type*));
t->sub[0] = base;
return t;
}
Type *mktyidxhack(int line, Type *base)
{
Type *t;
t = mktype(line, Tyvar);
t->nsub = 1;
t->sub = xalloc(sizeof(Type*));
t->sub[0] = base;
return t;
}
Type *mktyptr(int line, Type *base)
{
Type *t;
t = mktype(line, Typtr);
t->nsub = 1;
t->sub = xalloc(sizeof(Type*));
t->sub[0] = base;
return t;
}
Type *mktytuple(int line, Type **sub, size_t nsub)
{
Type *t;
size_t i;
t = mktype(line, 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(int line, Node **args, size_t nargs, Type *ret)
{
Type *t;
size_t i;
t = mktype(line, 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(int line, Node **decls, size_t ndecls)
{
Type *t;
t = mktype(line, Tystruct);
t->nsub = 0;
t->nmemb = ndecls;
t->sdecls = memdup(decls, ndecls*sizeof(Node *));
return t;
}
Type *mktyunion(int line, Ucon **decls, size_t ndecls)
{
Type *t;
t = mktype(line, Tyunion);
t->nmemb = ndecls;
t->udecls = decls;
return t;
}
int istyunsigned(Type *t)
{
switch (tybase(t)->type) {
case Tybyte: case Tyuint8: case Tyuint16: case Tyuint:
case Tychar: case Tyuint32: case Tyuint64: case Tyulong:
case Typtr:
return 1;
default:
return 0;
}
}
int istysigned(Type *t)
{
switch (tybase(t)->type) {
case Tyint8: case Tyint16: case Tyint:
case Tyint32: case Tyint64: case Tylong:
return 1;
default:
return 0;
}
}
int istyfloat(Type *t)
{
switch (tybase(t)->type) {
case Tyfloat32: case Tyfloat64:
return 1;
default:
return 0;
}
}
int isgeneric(Type *t)
{
size_t i;
if (t->type != Tyname && t->type != Tyunres)
return 0;
/*
if we have no arguments passed in, and we have parameters
we have a type of the form
type t(@a,...) = ...
*/
if (!t->narg)
return t->nparam > 0;
else
for (i = 0; i < t->narg; i++)
if (hasparams(t->arg[i]))
return 1;
return 0;
}
/*
* Checks if a type contains any type
* parameers at all (ie, if it generic).
*/
int hasparamsrec(Type *t, Bitset *visited)
{
size_t i;
switch (t->type) {
case Typaram:
return 1;
case Tyname:
case Tyunres:
return isgeneric(t);
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 (hasparams(t->sub[i]))
return 1;
break;
}
return 0;
}
int hasparams(Type *t)
{
Bitset *visited;
int r;
visited = mkbs();
r = hasparamsrec(t, visited);
bsfree(visited);
return r;
}
Type *tybase(Type *t)
{
assert(t != NULL);
while (t->type == Tyname)
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 += snprintf(p, end - p, "%s.", n->name.ns);
p += snprintf(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 += snprintf(p, end - p, " :: ");
sep = "";
for (i = 0; i < ntraittab; i++) {
if (bshas(t->traits, i)) {
p += snprintf(p, end - p, "%s%s", sep, namestr(traittab[i]->name));
sep = ",";
}
}
return p - buf;
}
static int fmtstruct(char *buf, size_t len, Type *t)
{
size_t i;
char *end, *p;
char *name, *ty;
p = buf;
end = p + len;
p += snprintf(p, end - p, "struct ");
for (i = 0; i < t->nmemb; i++) {
name = declname(t->sdecls[i]);
ty = tystr(decltype(t->sdecls[i]));
p += snprintf(p, end - p, "%s:%s; ", name, ty);
free(ty);
}
p += snprintf(p, end - p, ";;");
return p - buf;
}
static int fmtunion(char *buf, size_t len, Type *t)
{
size_t i;
char *end, *p;
char *name, *ty;
p = buf;
end = p + len;
p += snprintf(p, end - p, "union ");
for (i = 0; i < t->nmemb; i++) {
name = namestr(t->udecls[i]->name);
if (t->udecls[i]->etype) {
ty = tystr(t->udecls[i]->etype);
p += snprintf(p, end - p, "`%s %s; ", name, ty);
free(ty);
} else {
p += snprintf(p, end - p, "`%s; ", name);
}
}
p += snprintf(p, end - p, ";;");
return p - buf;
}
static int tybfmt(char *buf, size_t len, Type *t)
{
size_t i;
char *p;
char *end;
char *sep;
size_t narg;
Type **arg;
p = buf;
end = p + len;
sep = "";
if (!t) {
p += snprintf(p, end - p, "tynil");
return len - (end - p);
}
switch (t->type) {
case Tybad: p += snprintf(p, end - p, "BAD"); break;
case Tyvoid: p += snprintf(p, end - p, "void"); break;
case Tybool: p += snprintf(p, end - p, "bool"); break;
case Tychar: p += snprintf(p, end - p, "char"); break;
case Tyint8: p += snprintf(p, end - p, "int8"); break;
case Tyint16: p += snprintf(p, end - p, "int16"); break;
case Tyint: p += snprintf(p, end - p, "int"); break;
case Tyint32: p += snprintf(p, end - p, "int32"); break;
case Tyint64: p += snprintf(p, end - p, "int64"); break;
case Tylong: p += snprintf(p, end - p, "long"); break;
case Tybyte: p += snprintf(p, end - p, "byte"); break;
case Tyuint8: p += snprintf(p, end - p, "uint8"); break;
case Tyuint16: p += snprintf(p, end - p, "uint16"); break;
case Tyuint: p += snprintf(p, end - p, "uint"); break;
case Tyuint32: p += snprintf(p, end - p, "uint32"); break;
case Tyuint64: p += snprintf(p, end - p, "uint64"); break;
case Tyulong: p += snprintf(p, end - p, "ulong"); break;
case Tyfloat32: p += snprintf(p, end - p, "float32"); break;
case Tyfloat64: p += snprintf(p, end - p, "float64"); break;
case Tyvalist: p += snprintf(p, end - p, "..."); break;
case Typtr:
p += tybfmt(p, end - p, t->sub[0]);
p += snprintf(p, end - p, "#");
break;
case Tyslice:
p += tybfmt(p, end - p, t->sub[0]);
p += snprintf(p, end - p, "[:]");
break;
case Tyarray:
p += tybfmt(p, end - p, t->sub[0]);
p += snprintf(p, end - p, "[%llu]", t->asize->expr.args[0]->lit.intval);
break;
case Tyfunc:
p += snprintf(p, end - p, "(");
for (i = 1; i < t->nsub; i++) {
p += snprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, t->sub[i]);
sep = ", ";
}
p += snprintf(p, end - p, " -> ");
p += tybfmt(p, end - p, t->sub[0]);
p += snprintf(p, end - p, ")");
break;
case Tytuple:
p += snprintf(p, end - p, "[");
for (i = 0; i < t->nsub; i++) {
p += snprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, t->sub[i]);
sep = ", ";
}
p += snprintf(p, end - p, "]");
break;
case Tyvar:
p += snprintf(p, end - p, "$%d", t->tid);
if (t->nsub) {
p += snprintf(p, end - p, "(");
for (i = 0; i < t->nsub; i++) {
p += snprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, t->sub[i]);
sep = ", ";
}
p += snprintf(p, end - p, ")[]");
}
break;
case Typaram:
p += snprintf(p, end - p, "@%s", t->pname);
break;
case Tyunres:
p += snprintf(p, end - p, "?"); /* indicate unresolved name. should not be seen by user. */
p += namefmt(p, end - p, t->name);
if (t->narg) {
p += snprintf(p, end - p, "(");
for (i = 0; i < t->narg; i++) {
p += snprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, t->arg[i]);
sep = ", ";
}
p += snprintf(p, end - p, ")");
}
break;
case Tyname:
if (t->name->name.ns)
p += snprintf(p, end - p, "%s.", t->name->name.ns);
p += snprintf(p, end - p, "%s", namestr(t->name));
if (t->narg) {
arg = t->arg;
narg = t->narg;
} else {
arg = t->param;
narg = t->nparam;
}
if (!narg)
break;
p += snprintf(p, end - p, "(");
for (i = 0; i < narg; i++) {
p += snprintf(p, end - p, "%s", sep);
p += tybfmt(p, end - p, arg[i]);
sep = ", ";
}
p += snprintf(p, end - p, ")");
break;
case Tystruct: p += fmtstruct(p, end - p, t); break;
case Tyunion: p += fmtunion(p, end - p, 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);
return p - buf;
}
char *tyfmt(char *buf, size_t len, Type *t)
{
tybfmt(buf, len, t);
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;
if (t->type == Typaram)
hash = strhash(t->pname);
else
hash = inthash(t->tid);
for (i = 0; i < t->narg; i++)
hash ^= tyhash(t->arg[i]);
return hash;
}
int tyeq(void *t1, void *t2)
{
Type *a, *b;
size_t i;
a = (Type *)t1;
b = (Type *)t2;
if (a == b)
return 1;
if (a->type != b->type)
return 0;
if (a->tid == b->tid)
return 1;
if (a->narg != b->narg)
return 0;
if (a->nsub != b->nsub)
return 0;
if (a->nmemb != b->nmemb)
return 0;
switch (a->type) {
case Typaram:
return streq(a->pname, b->pname);
break;
case Tyunion:
for (i = 0; i < a->nmemb; i++)
if (!tyeq(a->udecls[i]->etype, b->udecls[i]->etype))
return 0;
break;
case Tyname:
if (!nameeq(a->name, b->name))
return 0;
for (i = 0; i < a->narg; i++)
if (!tyeq(a->arg[i], b->arg[i]))
return 0;
for (i = 0; i < a->nsub; i++)
if (!tyeq(a->sub[i], b->sub[i]))
return 0;
break;
default:
for (i = 0; i < a->nsub; i++)
if (!tyeq(a->sub[i], b->sub[i]))
return 0;
break;
}
return 1;
}
void tyinit(Stab *st)
{
int i;
Type *ty;
/* 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) \
mktrait(-1, mkname(-1, n), NULL, NULL, 0, NULL, 0, 0);
#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 < Tyfloat32; i++) {
traits[i][0] = traittab[Tcnum];
traits[i][1] = traittab[Tcint];
}
/* <floats>::(numeric,floating) */
traits[Tyfloat32][0] = traittab[Tcnum];
traits[Tyfloat32][1] = traittab[Tcfloat];
traits[Tyfloat64][0] = traittab[Tcnum];
traits[Tyfloat64][1] = traittab[Tcfloat];
/* @a*::(sliceable) */
traits[Typtr][0] = traittab[Tcslice];
/* @a[:]::(indexable,sliceable) */
traits[Tyslice][0] = traittab[Tcslice];
traits[Tyslice][1] = traittab[Tcidx];
/* @a[SZ]::(indexable,sliceable) */
traits[Tyarray][0] = traittab[Tcidx];
traits[Tyarray][1] = traittab[Tcslice];
/* 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) \
if (t != Ntypes) {\
ty = mktype(-1, t); \
if (n) { \
puttype(st, mkname(-1, n), ty); \
} \
}
#include "types.def"
#undef Ty
}