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gc: grammar cleanup:

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* no longer distinguishes const, var, type, package names.
  * all the predefined names are not tokens anymore.

R=ken
OCL=29326
CL=29985
This commit is contained in:
Russ Cox 2009-06-06 12:46:38 -07:00
parent ea33ff4067
commit 8f4af6d205
9 changed files with 827 additions and 858 deletions
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7
src/cmd/gc/align.c
View File

@ -208,7 +208,7 @@ dowidth(Type *t)
}
void
typeinit(int lex)
typeinit(void)
{
int i, etype, sameas;
Type *t;
@ -306,7 +306,7 @@ typeinit(int lex)
types[TFUNC] = functype(N, N, N);
/* types used in front end */
types[TNIL] = typ(TNIL);
// types[TNIL] got set early in lexinit
types[TIDEAL] = typ(TIDEAL);
/* simple aliases */
@ -317,7 +317,6 @@ typeinit(int lex)
/* pick up the backend typedefs */
for(i=0; typedefs[i].name; i++) {
s = lookup(typedefs[i].name);
s->lexical = lex;
etype = typedefs[i].etype;
if(etype < 0 || etype >= nelem(types))
@ -340,7 +339,7 @@ typeinit(int lex)
dowidth(t);
types[etype] = t;
s->otype = t;
s->def = typenod(t);
}
Array_array = rnd(0, widthptr);

215
src/cmd/gc/dcl.c
View File

@ -67,11 +67,11 @@ dodcltype(Type *n)
// if n has been forward declared,
// use the Type* created then
s = n->sym;
if(s->block == block && s->otype != T) {
switch(s->otype->etype) {
if(s->block == block && s->def != N && s->def->op == OTYPE) {
switch(s->def->type->etype) {
case TFORWSTRUCT:
case TFORWINTER:
n = s->otype;
n = s->def->type;
goto found;
}
}
@ -95,7 +95,7 @@ updatetype(Type *n, Type *t)
int local;
s = n->sym;
if(s == S || s->otype != n)
if(s == S || s->def == N || s->def->op != OTYPE || s->def->type != n)
fatal("updatetype %T = %T", n, t);
switch(n->etype) {
@ -132,7 +132,7 @@ updatetype(Type *n, Type *t)
n->printed = 0;
n->method = nil;
n->vargen = 0;
n->nod = N;
// catch declaration of incomplete type
switch(n->etype) {
case TFORWSTRUCT:
@ -306,7 +306,7 @@ addmethod(Node *n, Type *t, int local)
goto bad;
if(local && !f->local) {
yyerror("cannot define methods on non-local type %T", t);
yyerror("cannot define methods on non-local type %T", f);
return;
}
@ -383,7 +383,9 @@ funchdr(Node *n)
Sym *s;
s = n->nname->sym;
on = s->oname;
on = s->def;
if(on != N && (on->op != ONAME || on->builtin))
on = N;
// check for same types
if(on != N) {
@ -748,7 +750,7 @@ loop:
f->embedded = n->embedded;
f->sym = f->nname->sym;
if(pkgimportname != S && !exportname(f->sym->name))
f->sym = pkglookup(f->sym->name, pkgcontext);
f->sym = pkglookup(f->sym->name, structpkg);
}
*t = f;
@ -793,11 +795,8 @@ void
dcopy(Sym *a, Sym *b)
{
a->name = b->name;
a->oname = b->oname;
a->otype = b->otype;
a->oconst = b->oconst;
a->def = b->def;
a->package = b->package;
a->lexical = b->lexical;
a->undef = b->undef;
a->vargen = b->vargen;
a->block = b->block;
@ -954,11 +953,8 @@ addvar(Node *n, Type *t, int ctxt)
redeclare("variable", s);
s->vargen = gen;
s->oname = n;
s->def = n;
s->offset = 0;
s->oconst = nil;
s->otype = nil;
s->lexical = LNAME;
n->funcdepth = funcdepth;
n->type = t;
@ -1004,10 +1000,7 @@ addtyp(Type *n, int ctxt)
}
redeclare("type", s);
s->otype = n;
s->oconst = nil;
s->oname = nil;
s->lexical = LATYPE;
s->def = typenod(n);
d = dcl();
d->dsym = s;
@ -1041,7 +1034,7 @@ addconst(Node *n, Node *e, int ctxt)
Sym *s;
Dcl *r, *d;
if(n->op != ONAME)
if(n->op != ONAME && n->op != ONONAME)
fatal("addconst: not a name");
if(e->op != OLITERAL) {
@ -1059,10 +1052,8 @@ addconst(Node *n, Node *e, int ctxt)
}
redeclare("constant", s);
s->oconst = e;
s->otype = nil;
s->oname = nil;
s->lexical = LNAME;
s->def = e;
e->sym = s;
d = dcl();
d->dsym = s;
@ -1073,7 +1064,7 @@ addconst(Node *n, Node *e, int ctxt)
r->back = d;
if(dflag())
print("const-dcl %S %N\n", n->sym, n->sym->oconst);
print("const-dcl %S %N\n", n->sym, n->sym->def);
}
Node*
@ -1130,6 +1121,18 @@ newname(Sym *s)
return n;
}
Node*
typenod(Type *t)
{
if(t->nod == N) {
t->nod = nod(OTYPE, N, N);
t->nod->type = t;
t->nod->sym = t->sym;
}
return t->nod;
}
/*
* this will return an old name
* that has already been pushed on the
@ -1142,15 +1145,7 @@ oldname(Sym *s)
Node *n;
Node *c;
if(s->oconst) {
n = nod(OLITERAL, N, N);
n->sym = s;
n->val = s->oconst->val;
n->type = s->oconst->type;
return n;
}
n = s->oname;
n = s->def;
if(n == N) {
n = nod(ONONAME, N, N);
n->sym = s;
@ -1158,7 +1153,15 @@ oldname(Sym *s)
n->addable = 1;
n->ullman = 1;
}
if(n->funcdepth > 0 && n->funcdepth != funcdepth) {
if(n->op == OLITERAL) {
c = nod(OLITERAL, N, N);
c->sym = s;
c->val = n->val;
c->type = n->type;
c->iota = n->iota;
return c;
}
if(n->funcdepth > 0 && n->funcdepth != funcdepth && n->op == ONAME) {
// inner func is referring to var
// in outer func.
if(n->closure == N || n->closure->funcdepth != funcdepth) {
@ -1200,9 +1203,19 @@ oldtype(Sym *s)
{
Type *t;
t = s->otype;
if(t == T)
fatal("%S not a type", s); // cant happen
if(s->def == N || s->def->op != OTYPE) {
yyerror("%S is not a type", s);
return T;
}
t = s->def->type;
/*
* If t is lowercase and not in our package
* and this isn't a reference during the parsing
* of import data, complain.
*/
if(pkgimportname == S && !exportname(s->name) && strcmp(s->package, package) != 0)
yyerror("cannot use type %T", t);
return t;
}
@ -1219,9 +1232,9 @@ nametoanondcl(Node *na)
for(l=&na; (n=*l)->op == OLIST; l=&n->left)
n->right = nametoanondcl(n->right);
t = n->sym->otype;
if(t == T) {
yyerror("%s is not a type", n->sym->name);
n = n->sym->def;
if(n == N || n->op != OTYPE || (t = n->type) == T) {
yyerror("%S is not a type", n->sym);
t = typ(TINT32);
}
n = nod(ODCLFIELD, N, N);
@ -1261,33 +1274,95 @@ anondcl(Type *t)
return n;
}
static Node*
findtype(Node *n)
{
Node *r;
for(r=n; r->op==OLIST; r=r->right)
if(r->left->op == OKEY)
return r->left->right;
if(r->op == OKEY)
return r->right;
if(n->op == OLIST)
n = n->left;
return N;
}
static Node*
xanondcl(Node *nt, int dddok)
{
Node *n;
Type *t;
t = nt->type;
if(nt->op != OTYPE) {
yyerror("%N is not a type", nt);
t = types[TINT32];
}
n = nod(ODCLFIELD, N, N);
n->type = t;
if(!dddok && t->etype == TDDD)
yyerror("only last argument can have type ...");
return n;
}
static Node*
namedcl(Node *nn, Node *nt, int dddok)
{
Node *n;
Type *t;
if(nn->op == OKEY)
nn = nn->left;
if(nn->op == OTYPE && nn->sym == S) {
yyerror("cannot mix anonymous %T with named arguments", nn->type);
return xanondcl(nn, dddok);
}
t = types[TINT32];
if(nt == N)
yyerror("missing type for argument %S", nn->sym);
else if(nt->op != OTYPE)
yyerror("%S is not a type", nt->sym);
else
t = nt->type;
n = nod(ODCLFIELD, newname(nn->sym), N);
n->type = t;
if(!dddok && t->etype == TDDD)
yyerror("only last argument can have type ...");
return n;
}
/*
* check that the list of declarations is either all anonymous or all named
*/
void
Node*
checkarglist(Node *n)
{
if(n->op != OLIST)
return;
if(n->left->op != ODCLFIELD)
fatal("checkarglist");
if(n->left->left != N) {
for(n=n->right; n->op == OLIST; n=n->right)
if(n->left->left == N)
goto mixed;
if(n->left == N)
goto mixed;
} else {
for(n=n->right; n->op == OLIST; n=n->right)
if(n->left->left != N)
goto mixed;
if(n->left != N)
goto mixed;
}
return;
Node *r;
Node **l;
mixed:
yyerror("cannot mix anonymous and named function arguments");
// check for all anonymous
for(r=n; r->op==OLIST; r=r->right)
if(r->left->op == OKEY)
goto named;
if(r->op == OKEY)
goto named;
// all anonymous - add names
for(l=&n; (r=*l)->op==OLIST; l=&r->right)
r->left = xanondcl(r->left, 0);
*l = xanondcl(r, 1);
return n;
named:
// otherwise, each run of names ends in a type.
// add a type to each one that needs one.
for(l=&n; (r=*l)->op==OLIST; l=&r->right)
r->left = namedcl(r->left, findtype(r), 0);
*l = namedcl(r, findtype(r), 1);
return n;
}
/*
@ -1296,7 +1371,7 @@ mixed:
* func Init·<file>() (2)
* if initdone·<file> { (3)
* if initdone·<file> == 2 (4)
* return
* return
* throw(); (5)
* }
* initdone.<file>++; (6)
@ -1325,7 +1400,7 @@ anyinit(Node *n)
// is there an explicit init function
snprint(namebuf, sizeof(namebuf), "init·%s", filename);
s = lookup(namebuf);
if(s->oname != N)
if(s->def != N)
return 1;
// are there any imported init functions
@ -1333,7 +1408,7 @@ anyinit(Node *n)
for(s = hash[h]; s != S; s = s->link) {
if(s->name[0] != 'I' || strncmp(s->name, "Init·", 6) != 0)
continue;
if(s->oname == N)
if(s->def == N)
continue;
return 1;
}
@ -1409,13 +1484,13 @@ fninit(Node *n)
for(s = hash[h]; s != S; s = s->link) {
if(s->name[0] != 'I' || strncmp(s->name, "Init·", 6) != 0)
continue;
if(s->oname == N)
if(s->def == N)
continue;
if(s == initsym)
continue;
// could check that it is fn of no args/returns
a = nod(OCALL, s->oname, N);
a = nod(OCALL, s->def, N);
r = list(r, a);
}
@ -1426,8 +1501,8 @@ fninit(Node *n)
// could check that it is fn of no args/returns
snprint(namebuf, sizeof(namebuf), "init·%s", filename);
s = lookup(namebuf);
if(s->oname != N) {
a = nod(OCALL, s->oname, N);
if(s->def != N) {
a = nod(OCALL, s->def, N);
r = list(r, a);
}

176
src/cmd/gc/export.c
View File

@ -100,7 +100,7 @@ dumpexportconst(Sym *s)
Node *n;
Type *t;
n = s->oconst;
n = s->def;
if(n == N || n->op != OLITERAL)
fatal("dumpexportconst: oconst nil: %S", s);
@ -141,7 +141,7 @@ dumpexportvar(Sym *s)
Node *n;
Type *t;
n = s->oname;
n = s->def;
if(n == N || n->type == T) {
yyerror("variable exported but not defined: %S", s);
return;
@ -161,49 +161,54 @@ dumpexportvar(Sym *s)
void
dumpexporttype(Sym *s)
{
dumpprereq(s->otype);
Type *t;
t = s->def->type;
dumpprereq(t);
Bprint(bout, "\t");
switch (s->otype->etype) {
switch (t->etype) {
case TFORW:
case TFORWSTRUCT:
case TFORWINTER:
yyerror("export of incomplete type %T", s->otype);
yyerror("export of incomplete type %T", t);
return;
}
Bprint(bout, "type %#T %l#T\n", s->otype, s->otype);
Bprint(bout, "type %#T %l#T\n", t, t);
}
void
dumpsym(Sym *s)
{
Type *f;
Type *f, *t;
if(s->exported != 0)
return;
s->exported = 1;
switch(s->lexical) {
default:
if(s->def == N) {
yyerror("unknown export symbol: %S", s);
return;
}
switch(s->def->op) {
default:
yyerror("unexpected export symbol: %O %S", s->def->op, s);
break;
case LPACK:
yyerror("package export symbol: %S", s);
case OLITERAL:
dumpexportconst(s);
break;
case LATYPE:
case OTYPE:
t = s->def->type;
// TODO(rsc): sort methods by name
for(f=s->otype->method; f!=T; f=f->down)
for(f=t->method; f!=T; f=f->down)
dumpprereq(f);
dumpexporttype(s);
for(f=s->otype->method; f!=T; f=f->down)
for(f=t->method; f!=T; f=f->down)
Bprint(bout, "\tfunc (%#T) %hS %#hhT\n",
f->type->type->type, f->sym, f->type);
break;
case LNAME:
if(s->oconst)
dumpexportconst(s);
else
dumpexportvar(s);
case ONAME:
dumpexportvar(s);
break;
}
}
@ -216,7 +221,7 @@ dumptype(Type *t)
return;
// no need to dump type if it's not ours (was imported)
if(t->sym != S && t->sym->otype == t && !t->local)
if(t->sym != S && t->sym->def == typenod(t) && !t->local)
return;
Bprint(bout, "type %#T %l#T\n", t, t);
@ -256,43 +261,22 @@ dumpexport(void)
* import
*/
/*
* look up and maybe declare pkg.name, which should match lexical
*/
Sym*
pkgsym(char *name, char *pkg, int lexical)
{
Sym *s;
s = pkglookup(name, pkg);
switch(lexical) {
case LATYPE:
if(s->oname)
yyerror("%s.%s is not a type", name, pkg);
break;
case LNAME:
if(s->otype)
yyerror("%s.%s is not a name", name, pkg);
break;
}
s->lexical = lexical;
return s;
}
/*
* return the sym for ss, which should match lexical
*/
Sym*
importsym(Node *ss, int lexical)
importsym(Sym *s, int op)
{
Sym *s;
if(ss->op != OIMPORT)
fatal("importsym: oops1 %N", ss);
s = pkgsym(ss->sym->name, ss->psym->name, lexical);
/* TODO botch - need some diagnostic checking for the following assignment */
if(exportname(ss->sym->name))
if(s->def != N && s->def->op != op) {
// Clumsy hack for
// package parser
// import "go/parser" // defines type parser
if(s == lookup(package))
s->def = N;
else
yyerror("redeclaration of %lS during import", s, s->def->op, op);
}
if(exportname(s->name))
s->export = 1;
else
s->export = 2; // package scope
@ -304,47 +288,36 @@ importsym(Node *ss, int lexical)
* return the type pkg.name, forward declaring if needed
*/
Type*
pkgtype(char *name, char *pkg)
pkgtype(Sym *s)
{
Sym *s;
Type *t;
// botch
// s = pkgsym(name, pkg, LATYPE);
Node *n;
n = nod(OIMPORT, N, N);
n->sym = lookup(name);
n->psym = lookup(pkg);
s = importsym(n, LATYPE);
if(s->otype == T) {
importsym(s, OTYPE);
if(s->def == N || s->def->op != OTYPE) {
t = typ(TFORW);
t->sym = s;
s->otype = t;
s->def = typenod(t);
}
return s->otype;
return s->def->type;
}
static int
mypackage(Node *ss)
mypackage(Sym *s)
{
// we import all definitions for sys.
// lowercase ones can only be used by the compiler.
return strcmp(ss->psym->name, package) == 0
|| strcmp(ss->psym->name, "sys") == 0;
return strcmp(s->package, package) == 0
|| strcmp(s->package, "sys") == 0;
}
void
importconst(Node *ss, Type *t, Node *n)
importconst(Sym *s, Type *t, Node *n)
{
Sym *s;
if(!exportname(ss->sym->name) && !mypackage(ss))
if(!exportname(s->name) && !mypackage(s))
return;
importsym(s, OLITERAL);
convlit(n, t);
s = importsym(ss, LNAME);
if(s->oconst != N) {
if(s->def != N) {
// TODO: check if already the same.
return;
}
@ -356,19 +329,17 @@ importconst(Node *ss, Type *t, Node *n)
}
void
importvar(Node *ss, Type *t, int ctxt)
importvar(Sym *s, Type *t, int ctxt)
{
Sym *s;
if(!exportname(ss->sym->name) && !mypackage(ss))
if(!exportname(s->name) && !mypackage(s))
return;
s = importsym(ss, LNAME);
if(s->oname != N) {
if(cvttype(t, s->oname->type))
importsym(s, ONAME);
if(s->def != N && s->def->op == ONAME) {
if(cvttype(t, s->def->type))
return;
warn("redeclare import var %S from %T to %T",
s, s->oname->type, t);
s, s->def->type, t);
}
checkwidth(t);
addvar(newname(s), t, ctxt);
@ -378,25 +349,34 @@ importvar(Node *ss, Type *t, int ctxt)
}
void
importtype(Node *ss, Type *t)
importtype(Sym *s, Type *t)
{
Sym *s;
Node *n;
Type *tt;
s = importsym(ss, LATYPE);
if(s->otype != T) {
if(cvttype(t, s->otype))
importsym(s, OTYPE);
n = s->def;
if(n != N && n->op == OTYPE) {
if(cvttype(t, n->type))
return;
if(s->otype->etype != TFORW) {
if(n->type->etype != TFORW) {
warn("redeclare import type %S from %lT to %lT",
s, s->otype, t);
s->otype = typ(0);
s, n->type, t);
n = s->def = typenod(typ(0));
}
}
if(s->otype == T)
s->otype = typ(0);
*s->otype = *t;
s->otype->sym = s;
checkwidth(s->otype);
if(n == N || n->op != OTYPE) {
tt = typ(0);
tt->sym = s;
n = typenod(tt);
s->def = n;
}
if(n->type == T)
n->type = typ(0);
*n->type = *t;
n->type->sym = s;
n->type->nod = n;
checkwidth(n->type);
if(debug['E'])
print("import type %S %lT\n", s, t);
@ -425,7 +405,9 @@ return;
for(h=0; h<NHASH; h++)
for(s = hash[h]; s != S; s = s->link) {
t = s->otype;
if(s->def == N || s->def->op != OTYPE)
continue;
t = s->def->type;
if(t == T)
continue;

34
src/cmd/gc/go.h
View File

@ -145,6 +145,8 @@ struct Type
uchar copyany;
uchar local; // created in this file
Node* nod; // canonical OTYPE node
// TFUNCT
uchar thistuple;
uchar outtuple;
@ -187,6 +189,7 @@ struct Node
uchar diag; // already printed error about this
uchar noescape; // ONAME never move to heap
uchar funcdepth;
uchar builtin; // built-in name, like len or close
// most nodes
Node* left;
@ -247,10 +250,7 @@ struct Sym
char* package; // package name
char* name; // variable name
Node* oname; // ONAME node if a var
Type* otype; // TYPE node if a type
Node* oconst; // OLITERAL node if a const
char* opack; // package reference if lexical == LPACK
Node* def; // definition: ONAME OTYPE OPACK or OLITERAL
vlong offset; // stack location if automatic
int32 lexical;
int32 vargen; // unique variable number
@ -298,9 +298,8 @@ enum
{
OXXX,
OTYPE, OVAR, OIMPORT,
ONAME, ONONAME, ODCL,
ONAME, ONONAME, OTYPE, OPACK, OLITERAL,
ODCL,
ODOT, ODOTPTR, ODOTMETH, ODOTINTER,
ODCLFUNC, ODCLFIELD, ODCLARG,
OLIST, OCMP, OPTR, OARRAY, ORANGE,
@ -325,7 +324,7 @@ enum
OCALL, OCALLMETH, OCALLINTER,
OINDEX, OSLICE,
ONOT, OCOM, OPLUS, OMINUS, OSEND, ORECV,
OLITERAL, OREGISTER, OINDREG,
OREGISTER, OINDREG,
OKEY, OPARAM,
OCOMPOS, OCOMPSLICE, OCOMPMAP,
OCONV,
@ -573,6 +572,7 @@ EXTERN int importflag;
EXTERN int inimportsys;
EXTERN int initflag; // compiling the init fn
EXTERN int statuniqgen; // name generator for static temps
EXTERN int loophack;
EXTERN uint32 iota;
EXTERN Node* lastconst;
@ -595,8 +595,7 @@ EXTERN Node* fskel;
EXTERN Node* addtop;
EXTERN Node* typeswvar;
EXTERN char* context;
EXTERN char* pkgcontext;
EXTERN char* structpkg;
extern int thechar;
extern char* thestring;
EXTERN char* hunk;
@ -623,7 +622,7 @@ void importfile(Val*);
void cannedimports(char*, char*);
void unimportfile();
int32 yylex(void);
void typeinit(int lex);
void typeinit(void);
void lexinit(void);
char* lexname(int);
int32 getr(void);
@ -731,7 +730,7 @@ int isnilinter(Type*);
int isddd(Type*);
Type* maptype(Type*, Type*);
Type* methtype(Type*);
Sym* signame(Type*);
Node* signame(Type*);
int eqtype(Type*, Type*);
int cvttype(Type*, Type*);
int eqtypenoname(Type*, Type*);
@ -821,6 +820,7 @@ Node* renameinit(Node*);
void funchdr(Node*);
void funcargs(Type*);
void funcbody(Node*);
Node* typenod(Type*);
Type* dostruct(Node*, int);
Type** stotype(Node*, int, Type**);
Type* sortinter(Type*);
@ -844,7 +844,7 @@ void fninit(Node*);
Node* nametoanondcl(Node*);
Node* nametodcl(Node*, Type*);
Node* anondcl(Type*);
void checkarglist(Node*);
Node* checkarglist(Node*);
void checkwidth(Type*);
void defercheckwidth(void);
void resumecheckwidth(void);
@ -887,12 +887,12 @@ void doimport6(Node*, Node*);
void doimport7(Node*, Node*);
void doimport8(Node*, Val*, Node*);
void doimport9(Sym*, Node*);
void importconst(Node *ss, Type *t, Node *v);
void importconst(Sym *s, Type *t, Node *v);
void importmethod(Sym *s, Type *t);
void importtype(Node *ss, Type *t);
void importvar(Node *ss, Type *t, int ctxt);
void importtype(Sym *s, Type *t);
void importvar(Sym *s, Type *t, int ctxt);
void checkimports(void);
Type* pkgtype(char*, char*);
Type* pkgtype(Sym*);
/*
* walk.c

852
src/cmd/gc/go.y
View File

File diff suppressed because it is too large Load Diff

241
src/cmd/gc/lex.c
View File

@ -64,7 +64,7 @@ main(int argc, char *argv[])
fatal("betypeinit failed");
lexinit();
typeinit(LATYPE);
typeinit();
lineno = 1;
block = 1;
@ -711,6 +711,40 @@ l0:
}
break;
/*
* clumsy dance:
* to implement rule that disallows
* if T{1}[0] { ... }
* but allows
* if (T{1}[0]) { ... }
* the block bodies for if/for/switch/select
* begin with an LBODY token, not '{'.
*
* when we see the keyword, the next
* non-parenthesized '{' becomes an LBODY.
* loophack is normally 0.
* a keyword makes it go up to 1.
* parens increment and decrement when loophack > 0.
* a '{' with loophack == 1 becomes LBODY and disables loophack.
*
* i said it was clumsy.
*/
case '(':
if(loophack > 0)
loophack++;
goto lx;
case ')':
if(loophack > 0)
loophack--;
goto lx;
case '{':
if(loophack == 1) {
DBG("%L lex: LBODY\n", lineno);
loophack = 0;
return LBODY;
}
goto lx;
default:
goto lx;
}
@ -764,15 +798,16 @@ talph:
ungetc(c);
s = lookup(lexbuf);
if(s->lexical == LIGNORE)
switch(s->lexical) {
case LIGNORE:
goto l0;
if(context != nil) {
s = pkglookup(s->name, context);
if(s->lexical == LIGNORE)
goto l0;
if(!exportname(s->name) && strcmp(package, s->package) != 0)
s = pkglookup(s->name, ".private");
case LFOR:
case LIF:
case LSWITCH:
case LSELECT:
loophack = 1; // see comment about loophack above
break;
}
DBG("lex: %S %s\n", s, lexname(s->lexical));
@ -1109,77 +1144,74 @@ static struct
char* name;
int lexical;
int etype;
int op;
} syms[] =
{
/* name lexical etype
/* name lexical etype op
*/
/* basic types */
"int8", LATYPE, TINT8,
"int16", LATYPE, TINT16,
"int32", LATYPE, TINT32,
"int64", LATYPE, TINT64,
"int8", LNAME, TINT8, OXXX,
"int16", LNAME, TINT16, OXXX,
"int32", LNAME, TINT32, OXXX,
"int64", LNAME, TINT64, OXXX,
"uint8", LATYPE, TUINT8,
"uint16", LATYPE, TUINT16,
"uint32", LATYPE, TUINT32,
"uint64", LATYPE, TUINT64,
"uint8", LNAME, TUINT8, OXXX,
"uint16", LNAME, TUINT16, OXXX,
"uint32", LNAME, TUINT32, OXXX,
"uint64", LNAME, TUINT64, OXXX,
"float32", LATYPE, TFLOAT32,
"float64", LATYPE, TFLOAT64,
"float80", LATYPE, TFLOAT80,
"float32", LNAME, TFLOAT32, OXXX,
"float64", LNAME, TFLOAT64, OXXX,
"float80", LNAME, TFLOAT80, OXXX,
"bool", LATYPE, TBOOL,
"byte", LATYPE, TUINT8,
"string", LATYPE, TSTRING,
"bool", LNAME, TBOOL, OXXX,
"byte", LNAME, TUINT8, OXXX,
"string", LNAME, TSTRING, OXXX,
"any", LATYPE, TANY,
"any", LNAME, TANY, OXXX,
"break", LBREAK, Txxx,
"case", LCASE, Txxx,
"chan", LCHAN, Txxx,
"const", LCONST, Txxx,
"continue", LCONTINUE, Txxx,
"default", LDEFAULT, Txxx,
"else", LELSE, Txxx,
"defer", LDEFER, Txxx,
"fallthrough", LFALL, Txxx,
"false", LFALSE, Txxx,
"for", LFOR, Txxx,
"func", LFUNC, Txxx,
"go", LGO, Txxx,
"goto", LGOTO, Txxx,
"if", LIF, Txxx,
"import", LIMPORT, Txxx,
"interface", LINTERFACE, Txxx,
"iota", LIOTA, Txxx,
"make", LMAKE, Txxx,
"map", LMAP, Txxx,
"new", LNEW, Txxx,
"len", LLEN, Txxx,
"cap", LCAP, Txxx,
"nil", LNIL, Txxx,
"package", LPACKAGE, Txxx,
"panic", LPANIC, Txxx,
"panicln", LPANICN, Txxx,
"print", LPRINT, Txxx,
"println", LPRINTN, Txxx,
"range", LRANGE, Txxx,
"return", LRETURN, Txxx,
"select", LSELECT, Txxx,
"struct", LSTRUCT, Txxx,
"switch", LSWITCH, Txxx,
"true", LTRUE, Txxx,
"type", LTYPE, Txxx,
"var", LVAR, Txxx,
"break", LBREAK, Txxx, OXXX,
"case", LCASE, Txxx, OXXX,
"chan", LCHAN, Txxx, OXXX,
"const", LCONST, Txxx, OXXX,
"continue", LCONTINUE, Txxx, OXXX,
"default", LDEFAULT, Txxx, OXXX,
"else", LELSE, Txxx, OXXX,
"defer", LDEFER, Txxx, OXXX,
"fallthrough", LFALL, Txxx, OXXX,
"for", LFOR, Txxx, OXXX,
"func", LFUNC, Txxx, OXXX,
"go", LGO, Txxx, OXXX,
"goto", LGOTO, Txxx, OXXX,
"if", LIF, Txxx, OXXX,
"import", LIMPORT, Txxx, OXXX,
"interface", LINTERFACE, Txxx, OXXX,
"map", LMAP, Txxx, OXXX,
"package", LPACKAGE, Txxx, OXXX,
"range", LRANGE, Txxx, OXXX,
"return", LRETURN, Txxx, OXXX,
"select", LSELECT, Txxx, OXXX,
"struct", LSTRUCT, Txxx, OXXX,
"switch", LSWITCH, Txxx, OXXX,
"type", LTYPE, Txxx, OXXX,
"var", LVAR, Txxx, OXXX,
"close", LCLOSE, Txxx,
"closed", LCLOSED, Txxx,
"cap", LNAME, Txxx, OCAP,
"close", LNAME, Txxx, OCLOSE,
"closed", LNAME, Txxx, OCLOSED,
"len", LNAME, Txxx, OLEN,
"make", LNAME, Txxx, OMAKE,
"new", LNAME, Txxx, ONEW,
"panic", LNAME, Txxx, OPANIC,
"panicln", LNAME, Txxx, OPANICN,
"print", LNAME, Txxx, OPRINT,
"println", LNAME, Txxx, OPRINTN,
"notwithstanding", LIGNORE, Txxx,
"thetruthofthematter", LIGNORE, Txxx,
"despiteallobjections", LIGNORE, Txxx,
"whereas", LIGNORE, Txxx,
"insofaras", LIGNORE, Txxx,
"notwithstanding", LIGNORE, Txxx, OXXX,
"thetruthofthematter", LIGNORE, Txxx, OXXX,
"despiteallobjections", LIGNORE, Txxx, OXXX,
"whereas", LIGNORE, Txxx, OXXX,
"insofaras", LIGNORE, Txxx, OXXX,
};
void
@ -1189,6 +1221,7 @@ lexinit(void)
Sym *s;
Type *t;
int etype;
Val v;
/*
* initialize basic types array
@ -1201,25 +1234,51 @@ lexinit(void)
s->package = package;
etype = syms[i].etype;
if(etype == Txxx)
continue;
if(etype != Txxx) {
if(etype < 0 || etype >= nelem(types))
fatal("lexinit: %s bad etype", s->name);
t = types[etype];
if(t == T) {
t = typ(etype);
t->sym = s;
if(etype < 0 || etype >= nelem(types))
fatal("lexinit: %s bad etype", s->name);
t = types[etype];
if(t != T) {
s->otype = t;
dowidth(t);
types[etype] = t;
}
s->def = typenod(t);
continue;
}
t = typ(etype);
t->sym = s;
dowidth(t);
types[etype] = t;
s->otype = t;
etype = syms[i].op;
if(etype != OXXX) {
s->def = nod(ONAME, N, N);
s->def->sym = s;
s->def->etype = etype;
s->def->builtin = 1;
continue;
}
}
// there's only so much table-driven we can handle.
// these are special cases.
types[TNIL] = typ(TNIL);
s = lookup("nil");
v.ctype = CTNIL;
s->def = nodlit(v);
s->def->sym = s;
s = lookup("true");
s->def = nodbool(1);
s->def->sym = s;
s = lookup("false");
s->def = nodbool(0);
s->def->sym = s;
s = lookup("iota");
s->def = nodintconst(iota);
s->def->iota = 1; // flag to reevaluate on copy
// logically, the type of a string literal.
// types[TSTRING] is the named type string
// (the type of x in var x string or var x = "hello").
@ -1244,14 +1303,18 @@ struct
LCONST, "CONST",
LCONTINUE, "CONTINUE",
LDEC, "DEC",
LDEFER, "DEFER",
LELSE, "ELSE",
LEQ, "EQ",
LFALL, "FALL",
LFOR, "FOR",
LFUNC, "FUNC",
LGE, "GE",
LGO, "GO",
LGOTO, "GOTO",
LGT, "GT",
LIF, "IF",
LIMPORT, "IMPORT",
LINC, "INC",
LINTERFACE, "INTERFACE",
LLE, "LE",
@ -1262,7 +1325,7 @@ struct
LNAME, "NAME",
LNE, "NE",
LOROR, "OROR",
LPACK, "PACK",
LPACKAGE, "PACKAGE",
LRANGE, "RANGE",
LRETURN, "RETURN",
LRSH, "RSH",
@ -1270,16 +1333,6 @@ struct
LSWITCH, "SWITCH",
LTYPE, "TYPE",
LVAR, "VAR",
LFOR, "FOR",
LNEW, "NEW",
LLEN, "LEN",
LFALL, "FALL",
LIOTA, "IOTA",
LPRINT, "PRINT",
LPACKAGE, "PACKAGE",
LIMPORT, "IMPORT",
LDEFER, "DEFER",
LPANIC, "PANIC",
};
char*
@ -1316,8 +1369,8 @@ mkpackage(char* pkg)
// declare this name as a package
s = lookup(package);
s->lexical = LPACK;
s->opack = s->name;
s->def = nod(OPACK, N, N);
s->def->sym = s;
if(outfile == nil) {
p = strrchr(infile, '/');

13
src/cmd/gc/obj.c
View File

@ -58,7 +58,7 @@ dumpglobls(void)
continue;
dowidth(n->type);
ggloblnod(s->oname, n->type->width);
ggloblnod(s->def, n->type->width);
}
}
@ -393,6 +393,7 @@ dumpsignatures(void)
Dcl *d, *x;
Type *t, *progt, *methodt, *ifacet, *rcvrt;
Sym *s;
Node *n;
// copy externdcl list to signatlist
for(d=externdcl; d!=D; d=d->forw) {
@ -403,9 +404,10 @@ dumpsignatures(void)
if(t == T)
continue;
s = signame(t);
if(s == S)
n = signame(t);
if(n == N || n->sym == S)
continue;
s = n->sym;
x = mal(sizeof(*d));
x->op = OTYPE;
@ -425,10 +427,11 @@ dumpsignatures(void)
continue;
t = d->dtype;
et = t->etype;
s = signame(t);
n = signame(t);
//print("signame %S for %T\n", s, t);
if(s == S)
if(n == N || n->sym == S)
continue;
s = n->sym;
// only emit one
if(s->siggen)

47
src/cmd/gc/subr.c
View File

@ -156,9 +156,9 @@ lookup(char *p)
}
s = mal(sizeof(*s));
s->lexical = LNAME;
s->name = mal(strlen(p)+1);
s->package = package;
s->lexical = LNAME;
strcpy(s->name, p);
@ -186,7 +186,6 @@ pkglookup(char *p, char *k)
}
s = mal(sizeof(*s));
s->lexical = LNAME;
s->name = mal(strlen(p)+1);
strcpy(s->name, p);
@ -220,13 +219,11 @@ importdot(Sym *opkg)
if(strcmp(s->package, opkg->name) != 0)
continue;
s1 = lookup(s->name);
if(s1->oname != N || s1->otype != T) {
if(s1->def != N) {
yyerror("redeclaration of %S during import", s1);
continue;
}
s1->lexical = s->lexical;
s1->oname = s->oname;
s1->otype = s->otype;
s1->def = s->def;
}
}
}
@ -571,7 +568,7 @@ loop:
break;
case OTYPE:
print("%O-%E %lT\n", n->op, n->etype, n);
print("%O %T\n", n->op, n->type);
break;
case OIF:
@ -696,7 +693,6 @@ opnames[] =
[OGOTO] = "GOTO",
[OGT] = "GT",
[OIF] = "IF",
[OIMPORT] = "IMPORT",
[OINC] = "INC",
[OINDEX] = "INDEX",
[OINDREG] = "INDREG",
@ -722,6 +718,7 @@ opnames[] =
[OOR] = "OR",
[OPANICN] = "PANICN",
[OPANIC] = "PANIC",
[OPACK] = "PACK",
[OPARAM] = "PARAM",
[OPLUS] = "PLUS",
[OPRINTN] = "PRINTN",
@ -741,7 +738,6 @@ opnames[] =
[OTYPEOF] = "TYPEOF",
[OTYPESW] = "TYPESW",
[OTYPE] = "TYPE",
[OVAR] = "VAR",
[OXCASE] = "XCASE",
[OXFALL] = "XFALL",
[OXOR] = "XOR",
@ -1044,8 +1040,11 @@ Tpretty(Fmt *fp, Type *t)
fmtprint(fp, "%hS", s);
else
fmtprint(fp, "%lS", s);
if(strcmp(s->package, package) == 0)
if((s->otype != t || !s->export) && !s->imported) {
if(strcmp(s->package, package) != 0)
return 0;
if(s->imported)
return 0;
if(s->def == N || s->def->op != OTYPE || s->def->type != t || !s->export) {
fmtprint(fp, "·%s", filename);
if(t->vargen)
fmtprint(fp, "·%d", t->vargen);
@ -1339,7 +1338,7 @@ Nconv(Fmt *fp)
break;
case OTYPE:
snprint(buf, sizeof(buf), "%O-%E%J", n->op, n->etype, n);
snprint(buf, sizeof(buf), "%O %T", n->op, n->type);
break;
}
if(n->sym != S) {
@ -1581,7 +1580,7 @@ iscomposite(Type *t)
return 0;
}
Sym*
Node*
signame(Type *t)
{
Sym *ss;
@ -1611,10 +1610,10 @@ signame(Type *t)
strcpy(buf, "dotdotdot");
ss = pkglookup(buf, e);
if(ss->oname == N) {
ss->oname = newname(ss);
ss->oname->type = types[TUINT8];
ss->oname->class = PEXTERN;
if(ss->def == N) {
ss->def = newname(ss);
ss->def->type = types[TUINT8];
ss->def->class = PEXTERN;
}
//print("siggen %T %d\n", t, t->siggen);
@ -1633,10 +1632,10 @@ signame(Type *t)
}
out:
return ss;
return ss->def;
bad:
return S;
return N;
}
int
@ -1942,15 +1941,15 @@ syslook(char *name, int copy)
Node *n;
s = pkglookup(name, "sys");
if(s == S || s->oname == N)
if(s == S || s->def == N)
fatal("looksys: cant find sys.%s", name);
if(!copy)
return s->oname;
return s->def;
n = nod(0, N, N);
*n = *s->oname;
n->type = deep(s->oname->type);
*n = *s->def;
n->type = deep(s->def->type);
return n;
}
@ -2073,7 +2072,7 @@ frame(int context)
case OTYPE:
if(flag)
print("--- %s frame ---\n", p);
print("%O %lT\n", d->op, d->dnode);
print("%O %T\n", d->op, d->dnode);
flag = 0;
break;
}

100
src/cmd/gc/walk.c
View File

@ -123,8 +123,16 @@ loop:
return;
more = N;
if(n->op != ONAME)
switch(n->op) {
case ONAME: // one only; lineno isn't right for right now
case OPACK:
case OTYPE:
case OLITERAL:
break;
default:
lineno = n->lineno;
}
switch(n->op) {
case OLIST:
@ -248,6 +256,7 @@ loop:
switch(n->op) {
default:
dump("walk", n);
fatal("walktype: switch 1 unknown op %N", n);
goto ret;
@ -313,7 +322,10 @@ loop:
if(n->type == T) {
s = n->sym;
if(s->undef == 0) {
yyerror("walktype: %S undeclared", s);
if(n->etype != 0)
yyerror("walktype: %S must be called", s);
else
yyerror("walktype: %S undeclared", s);
s->undef = 1;
}
}
@ -1030,20 +1042,28 @@ loop:
case OMAKE:
if(top != Erv)
goto nottop;
l = n->left;
if(l == N) {
yyerror("missing argument to make");
goto ret;
}
indir(n, makecompat(n));
goto ret;
case ONEW:
if(top != Erv)
goto nottop;
if(n->left != N) {
yyerror("cannot new(%T, expr)", t);
goto ret;
}
t = n->type;
if(t == T)
goto ret;
indir(n, callnew(t));
l = n->left;
if(l == N)
yyerror("missing argument to new");
else if(n->right != N)
yyerror("too many arguments to new");
else if(l->op != OTYPE)
yyerror("argument to new must be type");
else if((t = l->type) == T)
;
else
indir(n, callnew(t));
goto ret;
}
@ -1927,12 +1947,12 @@ sigtype(Type *st)
x = mal(sizeof(*x));
x->op = OTYPE;
x->dsym = s;
x->dtype = s->otype;
x->dtype = t;
x->forw = signatlist;
x->block = block;
signatlist = x;
return s->otype;
return t;
}
/*
@ -2350,8 +2370,22 @@ Node*
makecompat(Node *n)
{
Type *t;
Node *l, *r;
t = n->type;
l = n->left;
r = N;
if(l->op == OLIST) {
r = l->right;
l = l->left;
}
if(l->op != OTYPE) {
yyerror("cannot make(expr)");
return n;
}
t = l->type;
n->type = t;
n->left = r;
n->right = N;
if(t != T)
switch(t->etype) {
@ -3045,9 +3079,8 @@ arrayop(Node *n, int top)
a = listfirst(&save, &n->left); // nel
if(a == N) {
if(t->bound < 0)
yyerror("new open array must have size");
a = nodintconst(t->bound);
yyerror("new slice must have size");
a = nodintconst(1);
}
a = nod(OCONV, a, N);
a->type = types[TINT];
@ -3193,7 +3226,6 @@ ifacecvt(Type *tl, Node *n, int et)
{
Type *tr;
Node *r, *a, *on;
Sym *s;
tr = n->type;
@ -3207,19 +3239,10 @@ ifacecvt(Type *tl, Node *n, int et)
a = n; // elem
r = a;
s = signame(tr); // sigt
if(s == S)
fatal("ifacecvt: signame-1 T2I: %lT", tr);
a = s->oname;
a = nod(OADDR, a, N);
a = nod(OADDR, signame(tr), N); // sigt
r = list(a, r);
s = signame(tl); // sigi
if(s == S) {
fatal("ifacecvt: signame-2 T2I: %lT", tl);
}
a = s->oname;
a = nod(OADDR, a, N);
a = nod(OADDR, signame(tl), N); // sigi
r = list(a, r);
on = syslook("ifaceT2I", 1);
@ -3240,11 +3263,7 @@ ifacecvt(Type *tl, Node *n, int et)
a = n; // interface
r = a;
s = signame(tl); // sigi or sigt
if(s == S)
fatal("ifacecvt: signame %d", et);
a = s->oname;
a = nod(OADDR, a, N);
a = nod(OADDR, signame(tl), N); // sigi or sigt
r = list(a, r);
on = syslook(ifacename[et], 1);
@ -3268,11 +3287,7 @@ ifacecvt(Type *tl, Node *n, int et)
a = n; // elem
r = a;
s = signame(tr); // sigt
if(s == S)
fatal("ifacecvt: signame-1 T2E: %lT", tr);
a = s->oname;
a = nod(OADDR, a, N);
a = nod(OADDR, signame(tr), N); // sigt
r = list(a, r);
on = syslook("ifaceT2E", 1);
@ -3394,7 +3409,9 @@ colasname(Node *n)
switch(n->op) {
case ONAME:
case ONONAME:
case OPACK:
break;
case OTYPE:
case OLITERAL:
if(n->sym != S)
break;
@ -4248,9 +4265,7 @@ arraylit(Node *n, Node *var)
if(b < 0) {
// slice
a = nod(OMAKE, N, N);
a->type = t;
a->left = nodintconst(ninit);
a = nod(OMAKE, nod(OLIST, typenod(t), nodintconst(ninit)), N);
a = nod(OAS, var, a);
addtop = list(addtop, a);
} else {
@ -4377,8 +4392,7 @@ maplit(Node *n, Node *var)
tempname(var, t);
}
a = nod(OMAKE, N, N);
a->type = t;
a = nod(OMAKE, typenod(t), N);
a = nod(OAS, var, a);
addtop = list(addtop, a);