File contents
/*ident "@(#)cls4:src/norm.c 1.12" */
/*******************************************************************************
C++ source for the C++ Language System, Release 3.0. This product
is a new release of the original cfront developed in the computer
science research center of AT&T Bell Laboratories.
Copyright (c) 1993 UNIX System Laboratories, Inc.
Copyright (c) 1991, 1992 AT&T and UNIX System Laboratories, Inc.
Copyright (c) 1984, 1989, 1990 AT&T. All Rights Reserved.
THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE of AT&T and UNIX System
Laboratories, Inc. The copyright notice above does not evidence
any actual or intended publication of such source code.
norm.c:
"normalization" handles problems which could have been handled
by the syntax analyser; but has not been done. The idea is
to simplify the grammar and the actions accociated with it,
and to get a more robust error handling
****************************************************************************/
#include "cfront.h"
#include "size.h"
#include "template.h"
//SYM -- table defs
Pktab Gtbl;
Pktab Ctbl;
Pname sta_name = 0;
static Ptype generic_tpdef = 0;
void syn_init()
{
generic_tpdef = new type;
generic_tpdef->base = TPDEF;
PERM(generic_tpdef);
any_type = new basetype(ANY,0);
PERM(any_type); any_type->defined = DEFINED;
dummy = new expr(DUMMY,0,0);
PERM(dummy);
dummy->tp = any_type;
zero = new expr(ZERO,0,0);
PERM(zero);
sta_name = new name;
PERM(sta_name);
//SYM -- init new tables
Gtbl = new ktable(GTBLSIZE,0,0); //SYM
Ctbl = Gtbl; //SYM
}
int stcount;
char* make_name(TOK c)
{
char* s = new char[8]; // as it happens: fits in two words
if (10000 <= ++stcount) error('i',"too many generatedNs");
sprintf(s,"__%c%d",c,stcount);
return s;
}
Pbase basetype::type_adj(TOK t)
{
DB(if(Ndebug>=1)error('d',"'%k'->type_adj(%k) --%t b_xname%n",base,t,this,b_xname););
if (b_xname) {
if (base)
error("badBT:%n%k",b_xname,t);
else {
base = TYPE;
b_name = b_xname;
}
b_xname = 0;
}
switch (t) {
case TYPEDEF:
if(b_typedef)
error('w',"two typedefs");
else if(b_inline) {
error("badBT:%k and%k",INLINE,TYPEDEF);
b_typedef=0;
}
else
b_typedef = 1;
break;
case INLINE:
if(b_inline)
error('w',"two inlines");
else if(b_typedef) {
error("badBT:%k and%k",TYPEDEF,INLINE);
b_inline=0;
}
else
b_inline = 1;
break;
case VIRTUAL: b_virtual = 1; break;
case CONST: if (b_const) error('w',"two const declarators");
b_const = 1; break;
case UNSIGNED: b_unsigned = 1; break;
case SHORT: b_short = 1; break;
case LONG: if (b_long) error('w',"two long declarators");
if (base == DOUBLE)
base = LDOUBLE;
else
b_long = 1;
break;
case FRIEND:
case OVERLOAD:
case EXTERN:
case STATIC:
case AUTO:
case REGISTER:
if (b_sto)
error("badBT:%k%k",b_sto,t);
else
b_sto = t;
break;
case DOUBLE:
if (b_long) {
t = LDOUBLE;
b_long = 0;
}
// no break
case VOID:
case CHAR:
case INT:
case FLOAT:
if (base)
error("badBT:%k%k",base,t);
else
base = t;
break;
case SIGNED:
case VOLATILE:
error('w',"\"%k\" not implemented (ignored)",t);
break;
default:
error('i',"BT::type_adj(%k)",t);
}
return this;
}
Pbase basetype::name_adj(Pname n)
{
DB(if(Ndebug>=1)error('d',"'%k'->name_adj(%n) --%t b_xname%n",base,n,this,b_xname));
if (b_xname) {
if (base)
error("badBT:%n%n",b_xname,n);
else {
base = TYPE;
b_name = b_xname;
}
b_xname = 0;
}
if ( base==0
&& n->base == TNAME
&& ( n->tp->base!=COBJ //SYM || in_arg_list )) {
|| Ctbl->k_id==ARG )) {
base = TYPE;
b_name = n;
}
else
b_xname = n;
return this;
}
static TOK type_set( Pbase b )
{
TOK t = 0;
if ( b->b_long ) t = LONG;
else if ( b->b_short ) t = SHORT;
else if ( b->b_unsigned ) t = UNSIGNED;
else if ( b->b_inline ) t = INLINE;
else if ( b->b_virtual ) t = VIRTUAL;
else if ( b->b_sto == OVERLOAD ) t = OVERLOAD;
return t;
}
int declTag = 1;
Pbase basetype::base_adj(Pbase b)
{
DB(if(Ndebug>=1)error('d',"'%k'->base_adj(%t) --%t b_xname%n",base,b,this,b_xname));
Pname bn = b->b_name;
switch (base) {
case COBJ:
case EOBJ:
error("NX after%k%n",base,b_name);
return this;
}
TOK t;
if (base) {
if (b_name)
error("badBT:%k%n%k%n",base,b_name,b->base,bn);
else
error("badBT:%k%k%n",base,b->base,bn);
}
else if ( t = type_set(this)) {
if (b_name)
error("badBT:%k%n%k%n",t,b_name,b->base,bn);
else {
if ( declTag++ && !(t==INLINE && b->base==EOBJ)) error("badBT:%k%k%n",t,b->base,bn);
base=b->base; b_name = bn;
// error('d',"base_adj: t: %k", t );
}
}
else {
base = b->base;
b_name = bn;
b_table = b->b_table;
}
return this;
}
Pbase basetype::check(Pname n)
/*
"n" is the first name to be declared using "this"
check the consistency of "this"
and use "b_xname" for "n->string" if possible and needed
*/
{
b_inline = 0;
b_virtual = 0;
//error('d',"basetype::check(%n) base %k b_xname %n",n,base,b_xname);
if (b_xname && (n->tp || n->string)) {
if (base)
error("badBT:%k%n",base,b_xname);
else {
base = TYPE;
b_name = b_xname;
}
b_xname = 0;
}
if (b_xname) {
if (n->string)
error("twoNs inD:%n%n",b_xname,n);
else {
n->string = b_xname->string;
b_xname->hide(); //SYM?
}
b_xname = 0;
}
if (ccl==0
&& n
&& n->n_oper==TNAME
&& !in_typedef
&& n->n_qualifier==0
&& n->string) { // hide type name
Pname nx = k_find_name(n->string,Ctbl,0); //SYM
if (nx && nx->base==TNAME) nx->hide();
}
int defa = 0;
switch (base) {
case 0:
defa = 1;
base = INT;
break;
case EOBJ:
case COBJ:
if (b_name->base == TNAME) error('i',"TN%n inCO %p",b_name,this);
}
if (b_long || b_short) {
TOK sl = (b_short) ? SHORT : LONG;
if (b_long && b_short) error("badBT:long short%k%n",base,n);
if (base != INT)
error("badBT:%k%k%n",sl,base,n);
else
base = sl;
b_short = b_long = 0;
}
if (b_typedef && b_sto) error("badBT:Tdef%k%n",b_sto,n);
b_typedef = b_sto = 0;
if (b_linkage) {
if (1 <= bl_level) error("local linkage directive");
}
if (Pfctvec_type == 0) return this;
if (b_const) {
if (b_unsigned) {
switch (base) {
default:
error("badBT: unsigned const %k%n",base,n);
b_unsigned = 0;
case LONG:
case SHORT:
case INT:
case CHAR:
return this;
}
}
return this;
}
else if (b_unsigned) {
switch (base) {
case LONG:
delete this;
return ulong_type;
case SHORT:
delete this;
return ushort_type;
case INT:
delete this;
return uint_type;
case CHAR:
delete this;
return uchar_type;
default:
error("badBT: unsigned%k%n",base,n);
b_unsigned = 0;
return this;
}
}
else {
switch (base) {
case LONG:
delete this;
return long_type;
case SHORT:
delete this;
return short_type;
case INT:
if (this==int_type || this==defa_type) return this;
delete this;
if (defa) return defa_type;
return int_type;
case CHAR:
delete this;
return char_type;
case VOID:
delete this;
return void_type;
case TYPE:
/* use a single base saved in the keyword */
if (b_name->n_qualifier) {
Pbase rv = Pbase(b_name->n_qualifier);
delete this;
return rv;
}
else {
PERM(this);
b_name->n_qualifier = (Pname)this;
return this;
}
default:
return this;
}
}
}
static int
check_redef( Pname on, Pname nn )
{
// nn is a new typedef
// on was returned from insert_type()
// check for conflicts
// return 1 for duplicate def, else 0
if (Nold) { //SYM type name was already in symbol table
//error('d',"'%n'->tdef() -- redef%t,%t",on,on->tp,nn->tp);
//error('d'," -- nn->base%k, on->base%k, nn->n_oper%k, on->n_key%k",nn->base,on->base,nn->n_oper,on->n_key);
if ( on->tp->check(nn->tp,0) == 0 ) { // duplicate typedef
nn->base = TNAME;
return 1; // avoid infinite loop for typedef I I;
}
if ( nn->tpdef->in_class && nn->tpdef->in_class->csu == ANON ) {
if ( nn->tpdef->defined == 0 )
error(&nn->where,"twoDs of %s (one in anonymous union)",nn->string);
} else if ( on->tpdef )
error(&nn->where,"%n redefined:Tdef%t andTdef%t",on,on->tp,nn->tp);
else
error(&nn->where,"%n redefined:%t andTdef%t",on,on->tp,nn->tp);
// kluge: avoid printing error twice for nested anon
nn->tpdef->defined = 1;
Pname nw = new name;
Pname x = on; x->n_key = VOID; // anything to get rid of it
*nw = *nn;
nw->n_tbl_list = 0;
nw->n_ktable = 0;
nw->n_table = 0;
on = insert_type(nw,Ctbl,TYPE);
if ( Nold ) error('i',&nn->where,"cannot recover");
on->n_hidden = x;
}
if ( on->n_key == HIDDEN ) {
if ( nn->tpdef->in_class && nn->tpdef->in_class->csu == ANON ) {
if ( nn->tpdef->defined == 0 )
error(&nn->where,"twoDs of %s (one in anonymous union)",nn->string);
} else
error(&nn->where,"%n redefined: identifier andTdef",on);
// kluge: avoid printing error twice for nested anon
nn->tpdef->defined = 1;
}
return 0;
}
Pname basetype::aggr()
/*
"type SM" seen e.g. struct s {};
class x;
enum e;
int tname;
friend cname;
friend class x;
int;
typedef int i; // where i is tname
convert
union { ... };
into
union name { ... } name ;
*/
{
DB(if(Ndebug>=1)error('d',"'%k'->aggr() --%t b_xname%n ccl%t",base,this,b_xname,ccl));
if (b_xname) {
if (base) {
Pname n = new name(b_xname->string);
//b_xname->hide();//SYM?
b_xname = 0;
return n->normalize(this,0,0);
}
else {
base = TYPE;
b_name = b_xname;
b_xname = 0;
}
}
switch (base) {
case COBJ:
{
Pclass cl = Pclass(b_name->tp);
char* s = cl->string;
/*SYM?*/if (cl->class_base != CL_TEMPLATE &&
(cl->in_class == 0 || cl->in_class->class_base != CL_TEMPLATE) &&
b_name->base == TNAME)
error('i',"TN%n inCO",b_name);
if (b_const) error("const%k%n",cl->csu,b_name);
if (cl->c_body == 2) { /* body seen */
if (s[0]=='_' && s[1]=='_' && s[2]=='C') {
char* ss = new char[8]; // max size of generated name is 7 chars, see make_name()
Pname obj = new name(ss);
strcpy(ss,s);
if (cl->csu==UNION && cl->class_base!=CL_TEMPLATE) {
ss[2] = 'O';
cl->csu = ANON;
Pname un = obj->normalize(this,0,0);
//SYM -- export anon union names
//SYM to current table
int i = 1;
Pname nn=cl->k_tbl->get_mem(i);
for (; nn; NEXT_NAME(cl->k_tbl,nn,i)) {
if ( nn->string==0 ) continue;
if ( nn->base == NAME ) {
insert_name(new name(nn->string),Ctbl);
} else if ( nn->tp == 0 ) {
error('i',"BT::aggr(): nullT for%n in anon union",nn);
} else {
Pname nx = new name(nn->string);
nx->tp = nn->tp;
nx->tpdef = nn->tpdef;
nx->where = nn->where;
if ( nn->tpdef ) {
nx=insert_type(nx,Ctbl,TYPE);
check_redef(nx,nn);
} else {
switch( nx->tp->base ) {
case COBJ:
{ Pclass mcl = (Pclass)Pbase(nn->tp)->b_name->tp;
if ( mcl->csu != ANON
&& !( mcl->string[0]=='_'
&& mcl->string[1]=='_'
&& mcl->string[2]=='C')
) {
nx=insert_type(nx,Ctbl,mcl->csu);
if ( Nold ) {
Pname x = nx->tp->is_cl_obj();
Pclass ocl = x?Pclass(x->tp):0;
if ( ocl==0
|| strcmp(ocl->string,mcl->string)
|| (ocl->defined&(DEF_SEEN|DEFINED))
&& (mcl->defined&(DEF_SEEN|DEFINED))
)
error(&nn->where,"twoDs of %s (one in anonymous union)",nn->string);
else if ( mcl->defined&(DEF_SEEN|DEFINED) )
nx->tp = nn->tp;
}
}
}
break;
case EOBJ:
if ( nn->string[0] == '_'
&& nn->string[1] == '_'
&& nn->string[2] == 'E' )
break;
nx=insert_type(nx,Ctbl,ENUM);
if ( Nold ) {
Ptype t = nx->tp->skiptypedefs();
Penum oe = t->base==EOBJ ? (Penum)Pbase(t)->b_name->tp : 0;
t = nn->tp->skiptypedefs();
Penum ne = t->base==EOBJ ? (Penum)Pbase(t)->b_name->tp : 0;
if ( oe==0
|| strcmp(oe->string,ne->string)
|| (oe->defined&(DEF_SEEN|DEFINED))
&& (ne->defined&(DEF_SEEN|DEFINED))
)
error(&nn->where,"twoDs of %s (one in anonymous union)",nn->string);
else if ( ne->defined&(DEF_SEEN|DEFINED) )
nx->tp = nn->tp;
}
break;
default:
error('i',&nn->where,"missing tpdef forTdefN %s",nx->string);
} // switch
} // else tag
//error('d',&nn->where,"exportingTN %n%t",nx,nx->tp);
} // else TNAME
} // for nn
return un;
}
if (cl->class_base!=CL_TEMPLATE)
error('w',"unusable%k ignored",cl->csu);
}
if ( b_sto == FRIEND )
error("friend%k%n{...} -- may only declare a friendC",cl->csu,b_name);
cl->c_body = 1;
return b_name;
}
else { /* really a typedef for cfront only: class x; */
if (b_sto == FRIEND) goto frr;
Pname nn = new name(cl->string);
nn->tp = b_name->tp;
nn->n_key = REF;
return nn;
}
}
case EOBJ:
{ Penum en = Penum(b_name->tp);
/*SYM?*/if (b_name->base == TNAME) error('i',"TN%n in enumO",b_name);
if (b_const) error("const enum%n",b_name);
if (en->e_body == 2) {
en->e_body = 1;
return b_name;
}
else {
error("forwardD of enum%n", b_name);
en->e_type = int_type;
}
return 0;
}
case 0:
{ Pname n = new name(make_name('D'));
n->tp = defa_type;
error("NX inDL");
return n;
}
default:
if (b_typedef) error('w',"illegalTdef ignored");
if (b_sto == FRIEND && b_name ) {
frr: // see also name::normalize(), stc == FRIEND
Pname fr = k_find_name(b_name->string,Ctbl,0); //SYM
if (fr == 0 || fr->base!=TNAME) error('i',"cannot find friend%n",b_name);
Pname n = new name(b_name->string);
n->n_sto = FRIEND;
// If it is a parameterized type, use the instantiation
// type, not the general type.
if ((fr->tp->base == COBJ) &&
(Pclass(Pbase(fr->tp)->b_name->tp)->class_base == CL_TEMPLATE)) {
if (base == COBJ)
n->tp = this;
else
if ((base == TYPE) &&
(Pbase(this)->b_name->base == TNAME) &&
(Pbase(this)->b_name->tp->base == COBJ))
n->tp = Pbase(this)->b_name->tp;
else
error('i', "basetype wasn't a COBJ");
}
else n->tp = fr->tp;
return n;
}
else {
Pname n = new name(make_name('D'));
n->tp = defa_type;
error("NX inDL");
return n;
}
}
}
//SYM -- removed void local_name()
//SYM void local_restore() removed
//SYM -- local_hide() removed
//SYM void nested_restore() removed
//SYM nested_hide(Pname) removed
//SYM static void nested_hide( Plist l ) removed
int defer_check = 0;
//SYM removed Pname statStat = 0;
void name::hide()
/*
hide "this": that is, "this" should not be a keyword in this scope
*/
{
if (base != TNAME) return;
//error('d',"'%n '->hide() -- %t lex_level %d bl_level %d",this,tp,lex_level,::bl_level);
if (n_key == 0) {
if (lex_level == bl_level && in_arg_list == 0) {
if (tp->base != COBJ) {
//error('d',"%n::hide() -- in_typedef base%k %t %t",this,in_typedef->base,tp,in_typedef);
if ( in_typedef && in_typedef->base
&& tp->base != type_set(Pbase(in_typedef))
&& in_typedef->check(tp,0) ) {
if ( defer_check == 0 )
error("%n redefined: previous: %t now: %t", this, tp, in_typedef);
}
}
else {
//error('d',"in_typedef%t %d tp%t %d",in_typedef,in_typedef,tp,tp);
//error('d',"in_typedef%k tp%k",in_typedef->base,tp->base);
if ( in_typedef && in_typedef->base
&& in_typedef->check(tp, 0) ) {
if ( defer_check == 0 )
error( "%n redefined: previous: %t now: %t", this, tp, in_typedef);
}
else {
Pname nn = Pbase(tp)->b_name;
Pclass cl = Pclass( nn->tp );
// check for 'typedef class X X;'
// and 'typedef X X;'
if ( in_typedef )
while ( in_typedef->base == TYPE )
in_typedef = Pbase(in_typedef)->b_name->tp;
if ( in_typedef
&& in_typedef->base==COBJ
&& same_class(Pclass(Pbase(in_typedef)->b_name->tp),cl) )
in_typedef = tp;
else if ( cl->has_ctor() )
error( "%n redefined: both aCNWK and %s", this, in_typedef?"a type name":"an identifier" );
}
}
}
// error( 'd', "%n::hide", this );
if ( n_table == 0 ) {
// error('d',"templp: in progress: %d", templp->in_progress);
Pclass cl = 0;
if ( tp->base == COBJ ) cl = tp->classtype();
if ( n_template_arg == template_type_formal &&
templp->in_progress )
error('s',"reuse of formalYZ%n",this);
else if ( cl && (cl->class_base == INSTANTIATED ||
cl->class_base == UNINSTANTIATED ))
error("illegal use of instantiatedYC%t", cl);
else error('i',"%n->hide() -- no n_table",this);
}
insert_name( new name(string), Ctbl );
}
}
//SYM removed Ntncheck, notReally
//SYM void set_scope(Pname tn) removed
//SYM void restore() removed
int classid; // index of generated class names
// saved and reset by grammer at start of each class def
// so nested tag indices will be relative
// -- ensures link compatibility for static member anon unions
Pname start_cl(TOK t, Pname c, Pbcl b)
{
int mk_local = 0;
DB( if(Ndebug>=1)
error('d',"start_cl(%k,%n,%d) ll %d",t,c,b,c?c->lex_level:0);
);
if (c == 0) {
int save = stcount; stcount = classid++;
c = new name(make_name('C'));
stcount = save;
c->lex_level -= in_class_decl + 1;
if ( in_typedef && c->lex_level )
mk_local = 1;
//SYM else c->lex_level = 0;
}
else if ( ccl && ccl->lex_level == c->lex_level
&& strcmp(ccl->string,c->string) == 0) {
error("%k %s redefines enclosing class",t,c->string);
error('i', "can't recover from previous errors");
}
Pname n = c->tname(t); /* t ignored */
n->where = curloc;
Pbase bt = Pbase(n->tp); /* COBJ */
if (bt->base != COBJ) {
error("twoDs of%n:%t andC",n,bt);
error('i', "can't recover from previous errors");
}
else {
if (strcmp(n->string,Pbase(n->tp)->b_name->string)!=0)
error("twoDs of %n:Tdef andC",n);
if (n->tp->classtype()->csu!=t && (t==UNION || n->tp->classtype()->csu==UNION))
error("twoDs of%n:%k and%k",n,t,n->tp->classtype()->csu);
bt->b_name->where = curloc; // line#s in dcl()
}
//SYM for ( Pclass tc = ccl; tc; tc = tc->in_class ) {
//SYM if ( tc->lex_level == c->lex_level // c not local to mem ftn of tc
//SYM && strcmp( tc->string, c->string) == 0) {
//SYM error( "C %s redefined", c->string );
//SYM error('i', "can't recover from previous errors");
//SYM }
// error('d',"ccl: %t bl: %d in_class_decl: %d ccl->lex_level: %d",ccl,bl_level,in_class_decl,ccl?ccl->lex_level:0);
// if (templp->in_progress && (c->lex_level == 0))
if (templp->in_progress && (c->lex_level == 0) &&
(ccl == 0 || (!ccl->in_class && ccl->class_base!=CL_TEMPLATE) ||
bl_level != ccl->lex_level + in_class_decl + 1 ))
// bring the template in scope
templp->introduce_class_templ(n);
// error('d',"'%n'->start_cl() ll %d",c, c->lex_level);
// error('d'," templ %d in_cl %d in_memf %d",templp->in_progress, in_class_decl, in_mem_fct);
if ( templp->in_progress && c->lex_level ) {
if ( in_class_decl == 0 || in_mem_fct )
if (mk_local==0)
error('s',"localC%nWinYF", c);
else error('s',"localCWinYF");
}
// typedef struct {} x;
if ( mk_local ) {
local_class = new name_list( n, local_class );
//SYM -- tn stuff removed
}
Pclass occl = ccl;
ccl = Pclass(bt->b_name->tp); /* CLASS */
if (ccl->defined) ccl->defined |= IN_ERROR;
ccl->defined |= DEF_SEEN;
// error('d', "start_cl: %n ccl->in_class: %t lex_level: %d", n, ccl->in_class, n->lex_level );
ccl->string = n->string;
ccl->csu = t;
// error('d',"typedef: ccl %t %n", ccl, n);
if (occl==0)
{
// if specialization, ccl->templ_base set within explicit_inst()
ccl->templ_base = templp->in_progress ? BOUND_TEMPLATE : ccl->templ_base;
}
//error('d',"ccl%t %d ll %d %s",ccl,ccl,ccl->lex_level,ccl->k_tbl->whereami());
if (b) { // list of base classes
for (Pbcl bx, bb=b, l=0; bb; bb = bx) {
bx = bb->next;
bb->next = 0;
if ( bb->bclass
//&& strcmp(ccl->string,bb->bclass->string)==0
&& ( ( bb->bclass->nested_sig
&& ccl->nested_sig
&& strcmp(ccl->nested_sig,
bb->bclass->nested_sig)==0 )
|| ( !bb->bclass->nested_sig
&& !ccl->nested_sig
&& strcmp(ccl->string,
bb->bclass->string)==0 ) ) )
error(&n->where,"%n derived from itself",n);
else if (l == 0)
l = bb;
else { // append and check for duplicates
for (Pbcl ll = l;;) {
if (bb->bclass && same_class(ll->bclass,bb->bclass)) {
error("%s has %s asB twice",ccl->string,bb->bclass->string);
break;
}
if (ll->next)
ll = ll->next;
else {
bb->next = l;
l = bb;
break;
}
}
}
}
ccl->baselist = l;
//SYM notReally++; set_scope(n); notReally--;
}
return n;
}
void end_cl()
{
if ( templp->parameters_in_progress )
error("definition ofC %tWinY parameterL : %d",ccl,templp->parameters_in_progress);
ccl->c_body = 2;
// ccl->templ_base may be set within explicit_inst()
ccl->templ_base = templp->in_progress
?
BOUND_TEMPLATE
:
ccl->in_class ? ccl->in_class->templ_base : ccl->templ_base;
ccl = ccl->in_class;
//SYM -- lots of stuff removed
}
Pbase end_enum(Pname n, nlist* b)
{
// error( 'd', "end_enum: %n ccl: %t", n , ccl );
bit anon = 0;
if (n == 0) {
anon = 1;
n = new name(make_name('E'));
n->lex_level = bl_level - in_class_decl; //SYM
}
// error('d',"'%n'->end_enum() ll %d",n, n->lex_level);
// error('d'," templ %d in_cl %d in_memf %d",templp->in_progress, in_class_decl, in_mem_fct);
if ( templp->parameters_in_progress )
error( "definition of enum %sWinY parameterL",anon?"":n->string);
if ( templp->in_progress && n->lex_level ) {
if ( in_class_decl == 0 || in_mem_fct )
if (anon==0)
error('s',"local enum%nWinYF", n);
else error('s',"local enumWinYF");
}
n = n->tname(ENUM);
Pbase bt = (Pbase)n->tp;
if (bt->base != EOBJ) {
error("twoDs of%n:%t and enum",n,bt);
error('i', "can't recover from previous errors");
}
bt->b_name->where = curloc;
Penum en = (Penum)bt->b_name->tp;
en->e_body = 2;
en->mem = name_unlist(b);
if (en->defined) {
// shouldn't be necessary anymore with nested types
// if ( in_class_decl )
// error("%n redefined, enum tag not local to class", n);
en->defined |= IN_ERROR;
}
en->defined |= DEF_SEEN;
en->templ_base = templp->in_progress
?
BOUND_TEMPLATE
:
en->in_class ? en->in_class->templ_base : en->templ_base;
return bt;
}
Pname name::tdef()
/*
typedef "this"
*/
{
// error('d',&where,"'%n'->tdef()%t in_typedef %d",this,tp,in_typedef);
// error('d',&where," lex_level %d tpdef%d",lex_level,tpdef);
// error('d',&where," templ %d in_cl %d in_memf %d",templp->in_progress, in_class_decl, in_mem_fct);
//SYM anon_cl removed
if (n_qualifier) {
error("QdN in typedef",this);
n_qualifier = 0;
}
if (tp == 0) error('i',"Tdef%n tp==0",this);
lex_level = bl_level - in_class_decl;
if ( ccl && ccl->lex_level == lex_level ) {
//error('d',&where,"Tdef%n ccl%t ll %d",this,ccl,lex_level);
tpdef = new type;
tpdef->base = TPDEF;
PERM(tpdef);
tpdef->nested_sig = make_nested_name(string,ccl);
if ( strcmp(ccl->string,string) == 0 ) {
error(&where,"nestedTdef%n redefines immediately enclosingC",this);
//SYM lookup mechanism in front end will ignore
//SYM members with same name as class
}
tpdef->in_class = ccl;
} else
tpdef = generic_tpdef;
if ( templp->in_progress && lex_level ) {
if ( in_class_decl == 0 || in_mem_fct )
error('s',"localTdef%nWinYF", this);
}
Pname n;
n = insert_type(this,Ctbl,TYPE);//SYM
if ( tpdef->in_class ) { // nested typedef
// error('d', "*****%s->tdef: %d ccl: %t", string, tpdef, ccl );
//SYM fields copied by insert()
if ( tp!=n->tp || tpdef !=n->tpdef ) // error detected below...
;
else {
n->tpdef->templ_base = templp->in_progress
?
BOUND_TEMPLATE
:
tpdef->in_class->templ_base;
}
// error('d',"tdef: templ_base: %d", n->tpdef->templ_base);
}
// else {
//SYM removed check for clash w/nested type
// }
if ( check_redef(n,this) ) return n;
n->base = base = TNAME;
PERM(n);
PERM(tp);
if (tp->base == PTR) PERM(Pptr(tp)->typ);
if (tp->base == COBJ || tp->base == EOBJ )
{ // typedef struct/enum { } s; => struct/enum s {};
Pname b = Pbase(tp)->b_name;
if (b->string[0] == '_' && b->string[1] == '_' )
switch ( tp->base ) {
case COBJ: {
if (b->string[2] == 'C') {
Pclass cl = Pclass(b->tp);
b->string = n->string;
cl->string = n->string;
if (!cl->local_sig)
cl->c_strlen = strlen(cl->string);
}
break;
}
case EOBJ: {
if (b->string[2] == 'E') {
Penum en = Penum(b->tp);
b->string = n->string;
en->string = n->string;
if (!en->local_sig )
en->e_strlen = strlen(en->string);
}
}
}
}
DB(if(Ndebug>=1) {
error('d',&where,">>'%n'->tdef()%t returning",this,tp);
error('d',&where," lex_level %d tpdef%t",lex_level,tpdef);
});
return n;
}
Pname name::tname(TOK csu)
/*
"csu" "this" seen, return typedef'd name for "this"
return (TNAME,x)-tp->(COBJ/EOBJ,y)-b_name->(NAME,z)-tp->(csue)
*/
{
//error('d',"'%n'::tname(%k)",this,csu);
char* s = 0;
bit nt = 0;
switch (base) {
case TNAME:
return this;
case NAME:
{ Pname tn = insert_type(this,Ctbl,csu);//SYM
Pname on = new name;
tn->base = TNAME;
tn->lex_level = lex_level;
//SYM tn->n_list = n_list = 0;
n_list = 0;
string = tn->string;
*on = *this;
switch (csu) {
case ENUM:
tn->tp = new basetype(EOBJ,on);
on->tp = new enumdef(0);
Penum(on->tp)->string = tn->string;
Penum(on->tp)->lex_level = tn->lex_level;
Penum(on->tp)->in_class = ccl;
Penum(on->tp)->e_strlen = strlen(tn->string);
break;
case CLASS:
case STRUCT:
case UNION:
on->tp = new classdef(csu);
s = Pclass(on->tp)->string = tn->string;
Pclass(on->tp)->lex_level = lex_level;
//SYM allocate k_tbl here instead of in PUSH_CLAA_SCOPE
//SYM to avoid problems with forward refs to template
//SYM class defs
Pclass(on->tp)->k_tbl = new ktable(0,0,tn);
Pclass(on->tp)->k_tbl->k_id = CLASS;
Pclass(on->tp)->in_class = ccl;
tn->tp = new basetype(COBJ,on);
Pbase(tn->tp)->b_table = Pclass(on->tp)->memtbl;
Pclass(on->tp)->c_strlen = strlen(tn->string);
break;
default:
error('i',&where,"illegal csu%k for%n in name::tname()",csu,this);
}
if ( ccl && lex_level == ccl->lex_level ) {
on->tp->nested_sig = make_nested_name(string,ccl);
if (s)
s = on->tp->nested_sig, nt = 1;
} else if ( lex_level ) {
on->tp->local_sig = make_local_name(on->tp,Ctbl->k_name);
if (s)
s = on->tp->local_sig;
}
PERM(tn);
PERM(tn->tp);
PERM(on);
PERM(on->tp);
if (s && ansi_opt && !templp->in_progress)
fprintf(out_file, "%s %s%s;\n", csu == UNION || csu == ANON ? "union" : "struct", nt ? "__" : "", s);
return tn;
}
default:
error('i',"tname(%s %d %k)",string,this,base);
return 0;
}
}
int co_hack;
Pname name::normalize(Pbase b, Pblock bl, bit Cast)
/*
if (bl) : a function definition (check that it really is a type
if (Cast) : no name string
for each name on the name list
invert the declarator list(s) and attatch basetype
watch out for class object initializers
convert
struct s { int a; } a;
into
struct s { int a; }; struct s a;
*/
{
Pname n;
Pname nn;
TOK stc;
bit tpdf;
bit inli;
bit virt;
char * lnkg;
DB( if(Ndebug>=1) {
error('d',"'%n'::normalize(b%t, bl %d, cast %d)",this,b,bl,Cast);
error('d'," tp%k - lex_level %d - bl_level %d",tp?tp->base:0,lex_level,bl_level);
});
if (b) {
stc = b->b_sto;
tpdf = b->b_typedef;
inli = b->b_inline;
virt = b->b_virtual;
lnkg = b->b_linkage;
}
else {
stc = 0;
tpdf = 0;
inli = 0;
virt = 0;
lnkg = 0;
}
if (inli && stc==EXTERN) {
error("both extern and inline");
inli = 0;
}
if ( stc==STATIC && tp &&
tp->base == FCT
&& Pfct(tp)->f_const )
error( "%n staticMF cannot be const", this );
if ( stc == FRIEND ) {
//error('d',"norm friend%n tp%t b%t",this,tp,b);
if ( tp || (b && (b->base || b->b_name || b->b_xname)) ) {
// friend dec with type mods -- enter as non type name
if ( Ctbl->k_id != CLASS && Ctbl->k_id != TEMPLATE)
error("friend%n not inC",this);
else if ( n_qualifier == 0 ) {
//XXXXX currently enter all unqualified
//XXXXX friends in Gtbl
//XXXXX Should eventually enter in enclosing
//XXXXX scope, however back end currently
//XXXXX doesn't support this, due to lack
//XXXXX of context info.
//XXXXX Commented code below will enter name
//XXXXX correctly when back end is brought
//XXXXX up to date.
//Pktab tb = Ctbl->k_next;
//if ( tb->k_id == TEMPLATE ) tb = tb->k_next;
//--lex_level;
//insert_name(this,tb);
lex_level = 0;
insert_name(this,Gtbl);
}
} else {
/* friend x;
must be handled during syntax analysis to cope with
class x { friend y; y* p; };
"y" is not local to "x":
class x { friend y; ... }; y* p;
is legal
examples:
typedef void SIG_TYP(int);
class x {
friend class y;
friend z;
friend x; // dumb
friend int i; // error
friend SIG_TYP sigFunc; // subtle
friend int f();
friend g(int);
};
*/
if (n_list) {
error("L of friends");
n_list = 0;
}
//error( 'd', "%n ll: %d", ccl, ccl->lex_level );
lex_level = ccl->lex_level;
//SYM k_find_name should have failed for visible tname...
Pname nx = k_find_name(string,Ctbl->k_next,0);//SYM
if ( nx && nx->base==NAME ) {
error(&where,"illegal friendD:F signature required for nonTN%n",nx);
nx = nx->n_hidden;//SYM
}
if ( nx == 0 ) {//SYM
//XXXXX currently enter all unqualified
//XXXXX friends in Gtbl
//XXXXX Should eventually enter in enclosing
//XXXXX scope, however back end currently
//XXXXX doesn't support this, due to lack
//XXXXX of context info.
//XXXXX Commented code below will enter name
//XXXXX correctly when back end is brought
//XXXXX up to date.
Pktab otbl = Ctbl;
Pclass occl = ccl;
if ( Ctbl->k_id != CLASS && Ctbl->k_id != TEMPLATE )
error("friend%n not inC",this);
Ctbl = Gtbl;
lex_level = 0;
ccl = 0;
//if ( Ctbl->k_id == CLASS || Ctbl->k_id == TEMPLATE ) {
// enter in enclosing scope
//Ctbl = Ctbl->k_next;
//if (Ctbl->k_id == TEMPLATE) Ctbl = Ctbl->k_next;
//lex_level = ccl->lex_level;
//ccl = ccl->in_class;
//}
nx = tname(CLASS);
Ctbl = otbl;
ccl = occl;
}
if ( nx->n_key == HIDDEN ) //SYM
error('w',"friend%n referring to hiddenTN",this);//SYM
//error('d',"friend%n --%k%t tbl %s",nx,nx->base,nx->tp,nx->n_ktable->whereami());
//error('d'," tbase%k",nx->tp->base);
n_sto = FRIEND;
tp = nx->tp;
return this;
}
} // if friend
if (tp // FUDGE: fix the bad grammar
&& tp->base==FCT
&& (n_oper==TNAME || Pfct(tp)->returns)) {
Pfct f = Pfct(tp);
Pfct f2 = Pfct(f->returns);
if (f2) {
Ptype pt;
Ptype t = f2;
lxlx:
switch (t->base) {
case RPTR:
case PTR: // x(* p)(args) ?
case VEC: // x(* p[10])(args) ?
if (pt = Pptr(t)->typ) {
if (pt->base == TYPE) {
Pptr(t)->typ = 0;
b = Pbase(pt);
}
else {
t = pt;
goto lxlx;
}
}
goto zse1;
case FCT:
{// Pexpr e = f2->argtype;
Pexpr e = Pfct(f)->argtype;
if (e && e->base==ELIST) { // get the real name; fix its type
if (e->e2 || e->e1->base!=DEREF) goto zse1;
Pexpr ee = e->e1;
Ptype t = 0;
Ptype tpx;
ldld:
switch (ee->base) {
case DEREF:
{ Ptype tt = (ee->e2) ? Ptype(new vec(0,ee->e2)) : Ptype (new ptr(PTR,0));
if (t)
Pptr(t)->typ = tt;
else
tpx = tt;
t = tt;
ee = ee->e1;
goto ldld;
}
case NAME:
{ Pname rn = Pname(ee);
{ Pname btn = k_find_name(string,Ctbl,0);//SYM
if(btn&&btn->base==NAME)btn=0;
b=new basetype(TYPE,btn);//SYM
}
f->returns = tpx;
n_oper = 0;
string = rn->string;
base = NAME;
}
}
}
}
}
}
}
zse1:
if (b == 0) {
error("BTX for %s",string);
b = Pbase(defa_type);
}
if (Cast) string = "";
b = b->check(this);
switch (b->base) { // separate class definitions
// from object and function type declarations
case COBJ:
nn = b->b_name;
if ( !Cast && Pclass(nn->tp)->c_body==2) {
/* first occurrence */
//error('d',"%n c_body==2",nn);
if ( stc == FRIEND ) {
Pclass cl = Pclass(nn->tp);
if ( cl->csu == ANON )
error( &nn->where, "friend anonymous union");
else
error( &nn->where, "%k%n defined in friendD",cl->csu,nn);
}
if (tp && tp->base==FCT && co_hack == 0) {
error(&this->where,"%k%n defined as returnT for%n (did you forget a ';' after '}' ?)",Pclass(nn->tp)->csu,nn,this);
nn = this;
break;
}
nn->n_list = this;
Pclass(nn->tp)->c_body = 1; /* other occurences */
}
else
nn = this;
break;
case EOBJ:
nn = b->b_name;
if (Penum(nn->tp)->e_body==2) {
if (tp && tp->base==FCT) {
error(&this->where,"enum%n defined as returnT for%n (did you forget a ';'?)",nn,this);
nn = this;
break;
}
nn->n_list = this;
Penum(nn->tp)->e_body = 1;
}
else {
Penum en = Penum(nn->tp);
if ( en->defined == 0 )
error( "forwardD of enum%n", nn );
en->e_type = int_type;
nn = this;
}
break;
default:
nn = this;
}
//error('d',&where,"name::normalize: nn%n ll %d nn %d this %d",nn,nn->lex_level,nn,this);
Pname nx;
Ptype btyp;
if(b->base==TYPE && b->b_const)
btyp = b->mkconst();
else
btyp = b;
for (n=this; n; n=nx) {
Ptype t = n->tp;
nx = n->n_list;
n->n_sto = stc;
if (n->base == TNAME) error('i',"redefinition ofTN%n",n);
if (t == 0) {
if (bl == 0) {
n->tp = t = btyp;
goto skipp;
}
else {
if ( n->base == NAME && n->n_oper )
error(&n->where,"illegalD of%n",n);
else
error(&n->where,"body of nonF%n",n);
t = new fct(0,0,0);
}
}
switch (t->base) {
case PTR:
case RPTR:
n->tp = Pptr(t)->normalize(btyp);
break;
case VEC:
n->tp = Pvec(t)->normalize(btyp);
break;
case FCT:
n->tp = Pfct(t)->normalize(btyp);
break;
case FIELD:
{
if (n->string == 0) n->string = make_name('F');
n->tp = t;
bit cft = 0;
Ptype tb = btyp->skiptypedefs(cft);
switch (tb->base) {
case CHAR:
case SHORT:
case LONG:
case EOBJ:
case INT:
// typedef const unsigned cu_int;
// struct x { x(); cu_int b1: 2; }
Pbase(t)->b_fieldtype = Pbase(tb)->b_unsigned ? uint_type : int_type;
Pbase(t)->b_unsigned = Pbase(tb)->b_unsigned;
Pbase(t)->b_const = cft;
break;
case ANY:
// error('d',"templp->in_progress %d", templp->in_progress);
if (templp->in_progress) // T t : 13;
Pbase(t)->b_fieldtype = int_type;
break;
default:
error("non-int field");
n->tp = defa_type;
}
break;
}
}
skipp:
Pfct f = Pfct(n->tp);
if (f->base != FCT) {
if (bl) {
error("body for nonF%n",n);
n->tp = f = new fct(defa_type,0,0);
continue;
}
if (inli) error("inline nonF%n",n);
if (virt) error("virtual nonF%n",n);
if (tpdf) {
// error('d', "%n->normalize: ccl: %t", this, ccl );
if (in_arg_list) {
error("Tdef inA list");
continue;
}
if (n->n_initializer) {
error("Ir forTdefN%n",n);
n->n_initializer = 0;
}
n->tdef();
// because do_nl_type() can't call tdef()
//SYM removed stuff
}
continue;
}
if ( lnkg ) set_linkage(lnkg);
f->f_linkage = linkage;
if ( lnkg ) set_linkage(0);
// wait and call f->sign() after args are checked
extern int inline_opt;
if (inline_opt)
f->f_inline = (bl && strcmp(n->string, "main") ? 1 : 0);
else
f->f_inline = inli;
// f->f_inline = inli;
f->f_is_inline = f->f_inline;
extern int vcounter;
f->f_virtual = virt?(vcounter++,VTOK):0;
if (tpdf) {
if (f->body = bl) {
error("Tdef%n { ... }",n);
f->body = bl = 0;
}
if (n->n_qualifier) {
// typedef T x::f(args);
// a pointer to member fucntion:
// equivalent to typedef T x::(f)(args);
f->memof = Pclass(Pbase(n->n_qualifier->tp)->b_name->tp);
n->n_qualifier = 0;
}
n->tdef();
// because do_nl_type() can't call tdef()
//SYM removed stuff
continue;
}
if (f->body = bl) continue;
/*
Check function declarations.
Look for class object instantiations
The real ambiguity: ; class x fo();
is interpreted as an extern function
declaration NOT a class object with an
empty initializer
*/
{ Pname cn = f->returns->is_cl_obj();
Ptype template_formal_type;
bit clob = (cn || cl_obj_vec);
if (f->argtype) { /* check argument/initializer list */
Pname nn;
for (nn=f->argtype; nn; nn=nn->n_list) {
if (nn->base != NAME) {
if (!clob) {
if ((f->returns->base == TYPE) &&
(Pbase(f->returns)->b_name->n_template_arg == template_type_formal))
{
template_formal_type = f->returns;
goto is_obj;
}
//error(&n->where,"ATX for%n",n);
goto zzz;
}
goto is_obj;
}
if (nn->tp) goto ok;
}
if (!clob) {
// error("FALX");
goto zzz;
}
is_obj:
/* it was an initializer: expand to constructor */
n->tp = f->returns;
if (f->argtype->base != ELIST) f->f_args = f->argtype = (Pname)new expr(ELIST,(Pexpr)f->argtype,0);
if ( n->n_initializer ) {
error(&n->where,"twoIrs for%n",n);
DEL( ((Pexpr)f->argtype) );
f->argtype = 0;
} else {
n->n_initializer = new texpr(VALUE, cn ? cn->tp : template_formal_type, (Pexpr)f->argtype);
}
goto ok;
zzz:
// ctor-style ilitializer for non class object
if (f->argtype) {
n->tp = f->returns;
if (f->argtype->base == ELIST) {
if ( f->argtype->e2 == 0 ) {
// int i(x)
f->argtype = (Pname)f->argtype->e1;
} else { // int i( x, y )
error("more than oneA for basicTIr");
for ( Pexpr e = f->argtype; e->e2->e2; e = e->e2 )
e->base = CM;
e->base = CM;
e->e2 = e->e2->e1;
}
}
if ( n->n_initializer ) {
error(&n->where,"twoIrs for%n",n);
DEL( ((Pexpr)f->argtype) );
f->argtype = 0;
} else {
n->n_initializer = (Pexpr)f->argtype;
}
goto ok;
}
}
else { /* T a(); => function declaration */
/*
if (clob) {
DEL(n->tp);
n->tp = f->returns;
}
*/
}
ok:
;
}
}
return nn;
}
Ptype vec::normalize(Ptype vecof)
{
Ptype t = typ;
typ = vecof;
while(vecof->base == TYPE)
vecof = Pbase(vecof)->b_name->tp;
switch (vecof->base) {
case RPTR:
error("array ofRs");
break;
case FCT:
error("array ofFs");
break;
case VOID:
error("array of void");
break;
default:
break;
}
if (t == 0) return this;
switch (t->base) {
case PTR:
case RPTR: return Pptr(t)->normalize(this);
case VEC: return Pvec(t)->normalize(this);
case FCT: return Pfct(t)->normalize(this);
default: error('i',"bad arrayT(%d)",t->base); return 0;
}
}
Ptype ptr::normalize(Ptype ptrto)
{
// if (this == 0) error('i',"0->ptr.normalize()");
Ptype t = typ;
typ = ptrto;
int bc = 0;
while (ptrto->base == TYPE) {
bc += Pbase(ptrto)->b_const;
ptrto = Pbase(ptrto)->b_name->tp;
}
switch (ptrto->base) {
case FCT:
if (memof)
if (Pfct(ptrto)->memof) {
if (!same_class(memof,Pfct(ptrto)->memof)) error("P toMF mismatch: %s and %s",memof->string, Pfct(ptrto)->memof->string);
}
else
Pfct(ptrto)->memof = memof;
else
memof = Pfct(ptrto)->memof;
break;
case RPTR:
switch (base) {
case PTR: error("P toR"); break;
case RPTR: error("R toR"); break;
}
break;
case VOID:
if(base==RPTR)
error("R to void");
break;
}
if (t == 0) {
Pbase b = Pbase(ptrto);
if (Pfctvec_type
&& b_const==0
&& b->b_unsigned==0
&& b->b_const==0
&& bc == 0
&& memof==0 && ptname==0
&& base==PTR) {
switch (b->base) {
case INT: delete this; return Pint_type;
case CHAR: delete this; return Pchar_type;
case VOID: delete this; return Pvoid_type;
}
}
return this;
}
switch (t->base) {
case PTR:
case RPTR: return Pptr(t)->normalize(this);
case VEC: return Pvec(t)->normalize(this);
case FCT: return Pfct(t)->normalize(this);
default: error('i',"badPT(%k)",t->base); return 0;
}
}
Ptype fct::normalize(Ptype ret)
/*
normalize return type
*/
{
//error('d',"%d%t()->norm(%d%t)",returns,returns,ret,ret);
register Ptype t = returns;
returns = ret;
if (argtype && argtype->base==NAME && argtype->n_qualifier) {
error("syntax: ANX");
argtype = 0;
nargs = 0;
nargs_known = 0;
}
while(ret->base == TYPE)
ret = Pbase(ret)->b_name->tp;
switch(ret->base) {
case VEC:
error("F returning array");
break;
case FCT:
error("F returningF");
//error('d',"t %d%k%t",t,t->base,t);
returns = ret = any_type;
break;
default:
break;
}
if (t == 0) return this;
switch (t->base) {
case PTR:
case RPTR: return Pptr(t)->normalize(this);
case VEC: return Pvec(t)->normalize(this);
case FCT: return Pfct(t)->normalize(this);
default: error('i',"badFT:%k",t->base); return 0;
}
}
void fct::argdcl(Pname dcl, Pname fn)
/*
sort out the argument types for old syntax:
f(a,b) int a; char b; { ... }
beware of
f(a) struct s { int a; }; struct s a;
*/
{
Pname n;
/*fprintf(stderr,"%d argtype %d %d dcl %d %d\n",this, argtype, argtype?argtype->base:0, dcl, dcl?dcl->base:0); fflush(stderr);*/
switch (base) {
case FCT: break;
case ANY: return;
default: error('i',"fct::argdcl(%d)",base);
}
if (argtype) {
switch (argtype->base) {
case NAME:
if (dcl) error("badF definition syntax");
for (n=argtype; n; n=n->n_list) {
if (n->string == 0) n->string = make_name('A');
}
return;
case ELIST: // expression list: f(a,b,c) int a; ... { ... }
// scan the elist and build a NAME list
{
Pname tail = 0;
n = 0;
error(strict_opt?0:'w',&fn->where,"old style definition of%n (anachronism)",fn);
for (Pexpr e=Pexpr(argtype); e; e=e->e2) {
Pexpr id = e->e1;
if (id->base != NAME) {
error("NX inAL");
argtype = 0;
dcl = 0;
break;
}
Pname nn = new name(id->string);
if (n)
tail = tail->n_list = nn;
else
tail = n = nn;
}
f_args = argtype = n;
break;
}
default:
error("ALX(%d)",argtype->base);
argtype = 0;
dcl = 0;
}
}
else if(nargs_known == ELLIPSIS) {
return;
}
else {
nargs_known = 1;
nargs = 0;
if (dcl) error("ADL forFWoutAs");
return;
}
// nargs_known = 0;
if (dcl) {
Pname d;
Pname dx;
/* for each argument name see if its type is specified
in the declaration list otherwise give it the default type
*/
for (n=argtype; n; n=n->n_list) {
char* s = n->string;
if (s == 0) {
error("AN missing inF definition");
n->string = s = make_name('A');
}
else if (n->tp) error("twoTs forA %s",n->string);
for (d=dcl; d; d=d->n_list) {
if (strcmp(s,d->string) == 0) {
if (d->tp && d->tp->base == VOID) {
error("voidA%n",d);
d->tp = any_type;
}
n->tp = d->tp;
n->n_sto = d->n_sto;
d->tp = 0; // now merged into argtype
goto xx;
}
}
n->tp = defa_type;
xx:;
if (n->tp == 0) error("noT for %s",n->string);
}
/* now scan the declaration list for "unused declarations"
and delete it
*/
for (d=dcl; d; d=dx) {
dx = d->n_list;
if (d->tp) { /* not merged with argtype list */
/*if (d->base == TNAME) ??? */
switch (d->tp->base) {
case CLASS:
case ENUM:
/* WARNING: this will reverse the order of
class and enum declarations
*/
d->n_list = argtype;
f_args = argtype = d;
break;
default:
error("%n inADL not inAL",d);
}
}
}
}
/* add default argument types if necessary */
for (n=argtype; n; n=n->n_list) {
if (n->tp == 0) n->tp = defa_type;
nargs++;
}
}
Pname cl_obj_vec; /* set if is_cl_obj() found a array of class objects */
Pname eobj; /* set if is_cl_obj() found an enum */
Pname type::is_cl_obj()
/*
returns this->b_name if this is a class object
returns 0 and sets cl_obj_vec to this->b_name
if this is a array of class objects
returns 0 and sets eobj to this->b_name
if this is an enum object
else returns 0
*/
{
bit v = 0;
register Ptype t = this;
if (t == 0) return 0;
eobj = 0;
cl_obj_vec = 0;
xx:
switch (t->base) {
case TYPE:
t = Pbase(t)->b_name->tp;
goto xx;
case COBJ:
if (v) {
cl_obj_vec = Pbase(t)->b_name;
return 0;
}
else
return Pbase(t)->b_name;
case VEC:
t = Pvec(t)->typ;
v=1;
goto xx;
case EOBJ:
eobj = Pbase(t)->b_name;
default:
return 0;
}
}
/* //SYM
* parsing table lookup
*/
static int
k_has_base( Pclass c1, Pclass c2, TOK& t )
/* true if c2 is an ancestor of c1
* t indicates whether derivation is virtual
*/
{
if ( c1 == 0 || c2 == 0 ) error('i',"k_has_base(%d,%d,...)",c1,c2);
for ( Pbcl b = c1->baselist; b; b = b->next ) {
TOK v;
t = b->base;
if ( same_class(b->bclass,c2) ) return 1;
if ( k_has_base(b->bclass,c2,v) ) {
if ( v==VIRTUAL ) t = VIRTUAL;
return 1;
}
}
t = 0;
return 0;
}
static Pname
k_find_in_base( char* s, Pclass cl, Pclass &acl, TOK k )
/* find s in class cl or one of its ancestors
* (for consistency, may convert to using stuff in find.c...)
*/
{
DB(if(Kdebug>=3)error('d',"k_find_in_base( %s, %t, ...,%k)",s,cl,k););
// look in base classes; check for dominance
Pname n = 0;
Pname n2 = 0;
Pclass ncl = 0, n2cl = 0; // init to avoid warnings
for (Pbcl b=cl->baselist; b; b=b->next) {
if ( strcmp(s,b->bclass->string) == 0 ) {
n = b->bclass->k_tbl->find_cn(s);
ncl = b->bclass;
}
else if ( (n = b->bclass->k_tbl->look(s,0)) != 0 )
ncl = b->bclass;
else
n = k_find_in_base( s, b->bclass, ncl, k );
if ( n == 0 ) continue;
if ( n2 ) {
// multiple defs from base classes
// Note: error diagnostics for ambiguous
// refs are printed by find.c
// To print them here would require knowledge of
// type/storage class for each name, in addition
// to virtual derivation.
// This code is only used to select the right name
// for parsing purposes and should match the name
// selection in find.c.
//XXXXX find.c should also be extended to handle member
//XXXXX types
TOK t;
if ( !same_class(ncl,n2cl) ) {
// check for dominance
//if ( k_has_base(ncl,n2cl,t) ) {
// ;// n dominates n2; save n
//} else
if ( k_has_base(n2cl,ncl,t) ) {
// n2 dominates n; discard n
n = n2;
ncl = n2cl;
}
}
}
n2 = n;
n2cl = ncl;
}
if ( n ) {
acl = ncl;
return n;
}
acl = n2cl;
return n2;
}
Pname
k_find_name(char* s, Pktab tbl, TOK k )
/* parse table lookup
*/
{
recurse:
DB(if(Kdebug>=3)error('d',"k_find_name( %s, %s,%k)",s,tbl->whereami(),k););
if ( tbl == 0 ) return 0;
Pname n;
if ( tbl->k_id == CLASS ) {
if ( tbl->k_name == 0 ) error('i',"C table with noN");
if ( strcmp(s,tbl->k_name->string) == 0 )
n = tbl->find_cn(s);
else {
Pclass cl = tbl->k_name->tp->classtype();
n = cl->k_tbl->look(s,0);
}
} else
n = tbl->look( s, 0 );
if ( n && k == HIDDEN && n->base != TNAME ) n = n->n_hidden;
DB(if(Kdebug>=3) {
if(n) error('d',"found%n base%k tp%t in %s",n,n->base,n->tp,n->n_ktable->whereami());
else error('d',"%s not found in %s",s,tbl->whereami());
});
if ( n ) return n;
// look in enclosing scope
// optimization: table::look already looked through containing
// blocks and global or first enclosing class scope
while ( tbl && tbl->k_id == BLOCK ) tbl = tbl->k_next;
if ( tbl == Gtbl ) return 0;
if ( tbl->k_id == CLASS ) {
if ( tbl->k_name == 0 ) error('i',"C table with noN");
Pclass cl = tbl->k_name->tp->classtype(), acl;
n = k_find_in_base(s,cl,acl,k);
} else // template/arg ???
n = tbl->look(s,0);
if ( n && k == HIDDEN && n->base != TNAME ) n = n->n_hidden;
if ( n ) return n;
// still failed -- look in next enclosing scope
tbl = tbl->k_next;
goto recurse; //return tbl ? k_find_name(s,tbl,k) : 0;
}
Pname
k_find_member(char* s, Pclass cl, TOK k )
/* parse table lookup
*/
{
DB(if(Kdebug>=3)error('d',"k_find_member( %s, %s,%k)",s,cl->string,k););
Pktab tbl = cl->k_tbl;
Pname n;
if ( tbl->k_id != CLASS ) error('i',"C tableX for%t!",cl);
if ( strcmp(s,cl->string) == 0 )
n = tbl->find_cn(s);
else
n = tbl->look(s,0);
if ( n && k == HIDDEN && n->base != TNAME ) n = n->n_hidden;
DB(if(Kdebug>=3) {
if(n) error('d',"found%n base%k tp%t in %s",n,n->base,n->tp,n->n_ktable->whereami());
else error('d',"%s not found in %s",s,tbl->whereami());
});
if ( n ) return n;
// look in base classes
Pclass acl;
n = k_find_in_base(s,cl,acl,k);
if ( n && k == HIDDEN && n->base != TNAME ) n = n->n_hidden;
DB(if(Kdebug>=3) {
if(n) error('d',"found%n base%k tp%t in %s",n,n->base,n->tp,n->n_ktable->whereami());
else error('d',"%s not found in bases of %s",s,tbl->whereami());
});
return n;
}
//SYM -- table insertion routines...
Pname
insert_name( Pname nn, Pktab tbl )
/* insert non type name into parsing table
*/
{
DB(if(Kdebug>=2)error('d',"insert_name( nn%n, tbl(%d) %s )",nn,tbl,tbl->whereami()););
Pname nx = k_find_name(nn->string,tbl,0);
if ( nx && nx->n_ktable == tbl ) {
if ( nx->base == TNAME ) {
DB(if(Kdebug>=2)error('d'," -- hiding%n tp%t",nx,nx->tp););
if ( nx->tp
&& nx->tp->base != COBJ
&& nx->tp->base != EOBJ ) {
DB(if(Kdebug>=2)error('d',"hidingTdef%n",nx));
}
nx->n_key = HIDDEN;
Pname ny = tbl->insert(nn,0);
if ( Nold ) error("hiddenTN%n inserted twice",nx);
else ny->n_hidden = nx;
nx = ny;
} else { // non-type name nx already exists in tbl
DB(if(Kdebug>=2)error('d'," -- nonTN%n already exists",nx););
; // error handled later
}
} else { // nn not in current table
Pname ny = tbl->insert(nn,0);
if ( nx && nx->base != TNAME )
nx = nx->n_hidden;
ny->n_hidden = nx;
nx = ny;
}
return nx;
}
Pname
insert_type( Pname nn, Pktab tbl, TOK tcsue )
/* insert new type name into tbl
* if another type name tn already exists, error
* if a non type name already exists, enter class/enum as hidden
*/
{
// type names defined in arg lists are entered in surrounding scope
// friends are entered in scope enclosing class
DB(if(Kdebug>=2)error('d',"insert_type( nn%n, tbl(%d) %s, tcsue%k )",nn,tbl,tbl->whereami(),tcsue););
if ( tbl->k_id == ARG ) {
// types defined in arg lists are entered in surrounding scope
do tbl = tbl->k_next; while ( tbl->k_id == ARG );
if ( tbl->k_id == TEMPLATE ) tbl = tbl->k_next;
}
if ( tbl->k_id == CLASS ) {
if ( ccl == 0 ) error('i',&nn->where,"insert_type(%n) -- no ccl for class table!",nn);
}
DB(if(Kdebug>=2)error('d'," -- real tbl %d %s",tbl,tbl->whereami()););
Pname nx = k_find_name( nn->string, tbl, 0 );
if ( nx && nx->n_ktable == tbl ) {
Nold = 0;
if ( nx->base == TNAME ) {
Nold = 1;
DB(if(Kdebug>=2)error('d',"TN%n redefined in same scope",nx););
} else { // nx is a non-type name in current table -- hide new type
if ( tcsue == TYPE ) {
;
DB(if(Kdebug>=2)error('d',"%n redefined asTdef",nx););
}
Pname ny = tbl->insert(nn,HIDDEN);
if ( Nold ) { // previous hidden tname
;
DB(if(Kdebug>=2)error('d',"hiddenTN%n redefined in same scope",nx););
} else { ny->n_hidden = nx->n_hidden; nx->n_hidden = ny;
DB(if(Kdebug>=2)error('d',"new, hiddenTN%n",nx););
}
nx = ny;
}
} else { // nn not in current table
Pname ny = tbl->insert(nn,0);
ny->n_hidden = nx;
nx = ny;
DB(if(Kdebug>=2)error('d',"new, unhiddenTN%n",nx););
}
nx->base = TNAME;
return nx;
}
char*
ktable::whereami()
{
if ( this == 0 ) return "NULL TABLE!!!";
else if ( k_id==ARG ) return "arg scope";
else if ( this==Gtbl ) return "global scope";
else if ( k_id==BLOCK ) return "block scope";
else if ( k_id==TEMPLATE ) return "template scope";
else if ( k_name ) return k_name->string;
else return "??? scope";
}
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