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dsymbol.c
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2010 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "rmem.h"
#include "speller.h"
#include "aav.h"
#include "mars.h"
#include "dsymbol.h"
#include "aggregate.h"
#include "identifier.h"
#include "module.h"
#include "mtype.h"
#include "expression.h"
#include "statement.h"
#include "declaration.h"
#include "id.h"
#include "scope.h"
#include "init.h"
#include "import.h"
#include "template.h"
#include "attrib.h"
/****************************** Dsymbol ******************************/
Dsymbol::Dsymbol()
{
//printf("Dsymbol::Dsymbol(%p)\n", this);
this->ident = NULL;
this->c_ident = NULL;
this->parent = NULL;
this->csym = NULL;
this->isym = NULL;
this->loc = 0;
this->comment = NULL;
this->scope = NULL;
}
Dsymbol::Dsymbol(Identifier *ident)
{
//printf("Dsymbol::Dsymbol(%p, ident)\n", this);
this->ident = ident;
this->c_ident = NULL;
this->parent = NULL;
this->csym = NULL;
this->isym = NULL;
this->loc = 0;
this->comment = NULL;
this->scope = NULL;
}
int Dsymbol::equals(Object *o)
{ Dsymbol *s;
if (this == o)
return TRUE;
s = (Dsymbol *)(o);
// Overload sets don't have an ident
if (s && ident && s->ident && ident->equals(s->ident))
return TRUE;
return FALSE;
}
/**************************************
* Copy the syntax.
* Used for template instantiations.
* If s is NULL, allocate the new object, otherwise fill it in.
*/
Dsymbol *Dsymbol::syntaxCopy(Dsymbol *s)
{
print();
printf("%s %s\n", kind(), toChars());
assert(0);
return NULL;
}
/**************************************
* Determine if this symbol is only one.
* Returns:
* FALSE, *ps = NULL: There are 2 or more symbols
* TRUE, *ps = NULL: There are zero symbols
* TRUE, *ps = symbol: The one and only one symbol
*/
int Dsymbol::oneMember(Dsymbol **ps)
{
//printf("Dsymbol::oneMember()\n");
*ps = this;
return TRUE;
}
/*****************************************
* Same as Dsymbol::oneMember(), but look at an array of Dsymbols.
*/
int Dsymbol::oneMembers(Dsymbols *members, Dsymbol **ps)
{
//printf("Dsymbol::oneMembers() %d\n", members ? members->dim : 0);
Dsymbol *s = NULL;
if (members)
{
for (int i = 0; i < members->dim; i++)
{ Dsymbol *sx = members->tdata()[i];
int x = sx->oneMember(ps);
//printf("\t[%d] kind %s = %d, s = %p\n", i, sx->kind(), x, *ps);
if (!x)
{
//printf("\tfalse 1\n");
assert(*ps == NULL);
return FALSE;
}
if (*ps)
{
if (s) // more than one symbol
{ *ps = NULL;
//printf("\tfalse 2\n");
return FALSE;
}
s = *ps;
}
}
}
*ps = s; // s is the one symbol, NULL if none
//printf("\ttrue\n");
return TRUE;
}
/*****************************************
* Is Dsymbol a variable that contains pointers?
*/
int Dsymbol::hasPointers()
{
//printf("Dsymbol::hasPointers() %s\n", toChars());
return 0;
}
char *Dsymbol::toChars()
{
return ident ? ident->toChars() : (char *)"__anonymous";
}
const char *Dsymbol::toPrettyChars()
{ Dsymbol *p;
char *s;
char *q;
size_t len;
//printf("Dsymbol::toPrettyChars() '%s'\n", toChars());
if (!parent)
return toChars();
len = 0;
for (p = this; p; p = p->parent)
len += strlen(p->toChars()) + 1;
s = (char *)mem.malloc(len);
q = s + len - 1;
*q = 0;
for (p = this; p; p = p->parent)
{
char *t = p->toChars();
len = strlen(t);
q -= len;
memcpy(q, t, len);
if (q == s)
break;
q--;
#if TARGET_NET
if (AggregateDeclaration* ad = p->isAggregateDeclaration())
{
if (ad->isNested() && p->parent && p->parent->isAggregateDeclaration())
{
*q = '/';
continue;
}
}
#endif
*q = '.';
}
return s;
}
char *Dsymbol::locToChars()
{
OutBuffer buf;
char *p;
if (!loc.filename) // avoid bug 5861.
{
Module *m = getModule();
if (m && m->srcfile)
loc.filename = m->srcfile->toChars();
}
return loc.toChars();
}
const char *Dsymbol::kind()
{
return "symbol";
}
/*********************************
* If this symbol is really an alias for another,
* return that other.
*/
Dsymbol *Dsymbol::toAlias()
{
return this;
}
Dsymbol *Dsymbol::toParent()
{
return parent ? parent->pastMixin() : NULL;
}
Dsymbol *Dsymbol::pastMixin()
{
Dsymbol *s = this;
//printf("Dsymbol::pastMixin() %s\n", toChars());
while (s && s->isTemplateMixin())
s = s->parent;
return s;
}
/**********************************
* Use this instead of toParent() when looking for the
* 'this' pointer of the enclosing function/class.
*/
Dsymbol *Dsymbol::toParent2()
{
Dsymbol *s = parent;
while (s && s->isTemplateInstance())
s = s->parent;
return s;
}
TemplateInstance *Dsymbol::inTemplateInstance()
{
for (Dsymbol *parent = this->parent; parent; parent = parent->parent)
{
TemplateInstance *ti = parent->isTemplateInstance();
if (ti)
return ti;
}
return NULL;
}
int Dsymbol::isAnonymous()
{
return ident ? 0 : 1;
}
/*************************************
* Set scope for future semantic analysis so we can
* deal better with forward references.
*/
void Dsymbol::setScope(Scope *sc)
{
//printf("Dsymbol::setScope() %p %s\n", this, toChars());
if (!sc->nofree)
sc->setNoFree(); // may need it even after semantic() finishes
scope = sc;
}
void Dsymbol::importAll(Scope *sc)
{
}
/*************************************
* Does semantic analysis on the public face of declarations.
*/
void Dsymbol::semantic0(Scope *sc)
{
}
void Dsymbol::semantic(Scope *sc)
{
error("%p has no semantic routine", this);
}
/*************************************
* Does semantic analysis on initializers and members of aggregates.
*/
void Dsymbol::semantic2(Scope *sc)
{
// Most Dsymbols have no further semantic analysis needed
}
/*************************************
* Does semantic analysis on function bodies.
*/
void Dsymbol::semantic3(Scope *sc)
{
// Most Dsymbols have no further semantic analysis needed
}
/*************************************
* Look for function inlining possibilities.
*/
void Dsymbol::inlineScan()
{
// Most Dsymbols aren't functions
}
/*********************************************
* Search for ident as member of s.
* Input:
* flags: 1 don't find private members
* 2 don't give error messages
* 4 return NULL if ambiguous
* Returns:
* NULL if not found
*/
Dsymbol *Dsymbol::search(Loc loc, Identifier *ident, int flags)
{
//printf("Dsymbol::search(this=%p,%s, ident='%s')\n", this, toChars(), ident->toChars());
return NULL;
}
/***************************************************
* Search for symbol with correct spelling.
*/
void *symbol_search_fp(void *arg, const char *seed)
{
Dsymbol *s = (Dsymbol *)arg;
Identifier id(seed, 0);
Module::clearCache();
s = s->search(0, &id, 4|2);
return s;
}
Dsymbol *Dsymbol::search_correct(Identifier *ident)
{
if (global.gag)
return NULL; // don't do it for speculative compiles; too time consuming
return (Dsymbol *)speller(ident->toChars(), &symbol_search_fp, this, idchars);
}
/***************************************
* Search for identifier id as a member of 'this'.
* id may be a template instance.
* Returns:
* symbol found, NULL if not
*/
Dsymbol *Dsymbol::searchX(Loc loc, Scope *sc, Identifier *id)
{
//printf("Dsymbol::searchX(this=%p,%s, ident='%s')\n", this, toChars(), ident->toChars());
Dsymbol *s = toAlias();
Dsymbol *sm;
switch (id->dyncast())
{
case DYNCAST_IDENTIFIER:
sm = s->search(loc, id, 0);
break;
case DYNCAST_DSYMBOL:
{ // It's a template instance
//printf("\ttemplate instance id\n");
Dsymbol *st = (Dsymbol *)id;
TemplateInstance *ti = st->isTemplateInstance();
id = ti->name;
sm = s->search(loc, id, 0);
if (!sm)
{ error("template identifier %s is not a member of %s %s",
id->toChars(), s->kind(), s->toChars());
return NULL;
}
sm = sm->toAlias();
TemplateDeclaration *td = sm->isTemplateDeclaration();
if (!td)
{
error("%s is not a template, it is a %s", id->toChars(), sm->kind());
return NULL;
}
ti->tempdecl = td;
if (!ti->semanticRun)
ti->semantic(sc);
sm = ti->toAlias();
break;
}
default:
assert(0);
}
return sm;
}
int Dsymbol::overloadInsert(Dsymbol *s)
{
//printf("Dsymbol::overloadInsert('%s')\n", s->toChars());
return FALSE;
}
void Dsymbol::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
{
buf->writestring(toChars());
}
unsigned Dsymbol::size(Loc loc)
{
error("Dsymbol '%s' has no size\n", toChars());
return 0;
}
int Dsymbol::isforwardRef()
{
return FALSE;
}
AggregateDeclaration *Dsymbol::isThis()
{
return NULL;
}
ClassDeclaration *Dsymbol::isClassMember() // are we a member of a class?
{
Dsymbol *parent = toParent();
if (parent && parent->isClassDeclaration())
return (ClassDeclaration *)parent;
return NULL;
}
void Dsymbol::defineRef(Dsymbol *s)
{
assert(0);
}
int Dsymbol::isExport()
{
return FALSE;
}
int Dsymbol::isImportedSymbol()
{
return FALSE;
}
int Dsymbol::isDeprecated()
{
return FALSE;
}
#if DMDV2
int Dsymbol::isOverloadable()
{
return 0;
}
#endif
LabelDsymbol *Dsymbol::isLabel() // is this a LabelDsymbol()?
{
return NULL;
}
AggregateDeclaration *Dsymbol::isMember() // is this a member of an AggregateDeclaration?
{
//printf("Dsymbol::isMember() %s\n", toChars());
Dsymbol *parent = toParent();
//printf("parent is %s %s\n", parent->kind(), parent->toChars());
return parent ? parent->isAggregateDeclaration() : NULL;
}
Type *Dsymbol::getType()
{
return NULL;
}
int Dsymbol::needThis()
{
return FALSE;
}
int Dsymbol::addMember(Scope *sc, ScopeDsymbol *sd, int memnum)
{
//printf("Dsymbol::addMember('%s')\n", toChars());
//printf("Dsymbol::addMember(this = %p, '%s' scopesym = '%s')\n", this, toChars(), sd->toChars());
//printf("Dsymbol::addMember(this = %p, '%s' sd = %p, sd->symtab = %p)\n", this, toChars(), sd, sd->symtab);
parent = sd;
if (!isAnonymous()) // no name, so can't add it to symbol table
{
if (!sd->symtabInsert(this)) // if name is already defined
{
Dsymbol *s2;
s2 = sd->symtab->lookup(ident);
if (!s2->overloadInsert(this))
{
sd->multiplyDefined(0, this, s2);
}
}
if (sd->isAggregateDeclaration() || sd->isEnumDeclaration())
{
if (ident == Id::__sizeof || ident == Id::__xalignof || ident == Id::mangleof)
error(".%s property cannot be redefined", ident->toChars());
}
return 1;
}
return 0;
}
void Dsymbol::error(const char *format, ...)
{
//printf("Dsymbol::error()\n");
if (!global.gag)
{
char *p = locToChars();
if (*p)
fprintf(stdmsg, "%s: ", p);
mem.free(p);
fprintf(stdmsg, "Error: ");
if (isAnonymous())
fprintf(stdmsg, "%s ", kind());
else
fprintf(stdmsg, "%s %s ", kind(), toPrettyChars());
va_list ap;
va_start(ap, format);
vfprintf(stdmsg, format, ap);
va_end(ap);
fprintf(stdmsg, "\n");
fflush(stdmsg);
//halt();
}
global.errors++;
//fatal();
}
void Dsymbol::error(Loc loc, const char *format, ...)
{
if (!global.gag)
{
char *p = loc.toChars();
if (!*p)
p = locToChars();
if (*p)
fprintf(stdmsg, "%s: ", p);
mem.free(p);
fprintf(stdmsg, "Error: ");
fprintf(stdmsg, "%s %s ", kind(), toPrettyChars());
va_list ap;
va_start(ap, format);
vfprintf(stdmsg, format, ap);
va_end(ap);
fprintf(stdmsg, "\n");
fflush(stdmsg);
//halt();
}
global.errors++;
//fatal();
}
void Dsymbol::checkDeprecated(Loc loc, Scope *sc)
{
if (!global.params.useDeprecated && isDeprecated())
{
// Don't complain if we're inside a deprecated symbol's scope
for (Dsymbol *sp = sc->parent; sp; sp = sp->parent)
{ if (sp->isDeprecated())
goto L1;
}
for (; sc; sc = sc->enclosing)
{
if (sc->scopesym && sc->scopesym->isDeprecated())
goto L1;
// If inside a StorageClassDeclaration that is deprecated
if (sc->stc & STCdeprecated)
goto L1;
}
error(loc, "is deprecated");
}
L1:
Declaration *d = isDeclaration();
if (d && d->storage_class & STCdisable)
{
if (!(sc->func && sc->func->storage_class & STCdisable))
{
if (d->ident == Id::cpctor && d->toParent())
d->toParent()->error(loc, "is not copyable because it is annotated with @disable");
else
error(loc, "is not callable because it is annotated with @disable");
}
}
}
/**********************************
* Determine which Module a Dsymbol is in.
*/
Module *Dsymbol::getModule()
{
Module *m;
Dsymbol *s;
//printf("Dsymbol::getModule()\n");
s = this;
while (s)
{
//printf("\ts = '%s'\n", s->toChars());
m = s->isModule();
if (m)
return m;
s = s->parent;
}
return NULL;
}
/*************************************
*/
enum PROT Dsymbol::prot()
{
return PROTpublic;
}
/*************************************
* Do syntax copy of an array of Dsymbol's.
*/
Dsymbols *Dsymbol::arraySyntaxCopy(Dsymbols *a)
{
Dsymbols *b = NULL;
if (a)
{
b = (Dsymbols *)a->copy();
for (int i = 0; i < b->dim; i++)
{
Dsymbol *s = b->tdata()[i];
s = s->syntaxCopy(NULL);
b->tdata()[i] = s;
}
}
return b;
}
/****************************************
* Add documentation comment to Dsymbol.
* Ignore NULL comments.
*/
void Dsymbol::addComment(unsigned char *comment)
{
//if (comment)
//printf("adding comment '%s' to symbol %p '%s'\n", comment, this, toChars());
if (!this->comment)
this->comment = comment;
#if 1
else if (comment && strcmp((char *)comment, (char *)this->comment))
{ // Concatenate the two
this->comment = Lexer::combineComments(this->comment, comment);
}
#endif
}
/********************************* OverloadSet ****************************/
#if DMDV2
OverloadSet::OverloadSet()
: Dsymbol()
{
}
void OverloadSet::push(Dsymbol *s)
{
a.push(s);
}
const char *OverloadSet::kind()
{
return "overloadset";
}
#endif
/********************************* ScopeDsymbol ****************************/
ScopeDsymbol::ScopeDsymbol()
: Dsymbol()
{
members = NULL;
symtab = NULL;
imports = NULL;
prots = NULL;
}
ScopeDsymbol::ScopeDsymbol(Identifier *id)
: Dsymbol(id)
{
members = NULL;
symtab = NULL;
imports = NULL;
prots = NULL;
}
Dsymbol *ScopeDsymbol::syntaxCopy(Dsymbol *s)
{
//printf("ScopeDsymbol::syntaxCopy('%s')\n", toChars());
ScopeDsymbol *sd;
if (s)
sd = (ScopeDsymbol *)s;
else
sd = new ScopeDsymbol(ident);
sd->members = arraySyntaxCopy(members);
return sd;
}
Dsymbol *ScopeDsymbol::search(Loc loc, Identifier *ident, int flags)
{
//printf("%s->ScopeDsymbol::search(ident='%s', flags=x%x)\n", toChars(), ident->toChars(), flags);
//if (strcmp(ident->toChars(),"c") == 0) *(char*)0=0;
// Look in symbols declared in this module
Dsymbol *s = symtab ? symtab->lookup(ident) : NULL;
//printf("\ts = %p, imports = %p, %d\n", s, imports, imports ? imports->dim : 0);
if (s)
{
//printf("\ts = '%s.%s'\n",toChars(),s->toChars());
}
else if (imports)
{
OverloadSet *a = NULL;
// Look in imported modules
for (int i = 0; i < imports->dim; i++)
{ ScopeDsymbol *ss = imports->tdata()[i];
Dsymbol *s2;
// If private import, don't search it
if (flags & 1 && prots[i] == PROTprivate)
continue;
//printf("\tscanning import '%s', prots = %d, isModule = %p, isImport = %p\n", ss->toChars(), prots[i], ss->isModule(), ss->isImport());
/* Don't find private members if ss is a module
*/
s2 = ss->search(loc, ident, ss->isModule() ? 1 : 0);
if (!s)
s = s2;
else if (s2 && s != s2)
{
if (s->toAlias() == s2->toAlias())
{
/* After following aliases, we found the same symbol,
* so it's not an ambiguity.
* But if one alias is deprecated, prefer the other.
*/
if (s->isDeprecated())
s = s2;
}
else
{
/* Two imports of the same module should be regarded as
* the same.
*/
Import *i1 = s->isImport();
Import *i2 = s2->isImport();
if (!(i1 && i2 &&
(i1->mod == i2->mod ||
(!i1->parent->isImport() && !i2->parent->isImport() &&
i1->ident->equals(i2->ident))
)
)
)
{
/* If both s2 and s are overloadable (though we only
* need to check s once)
*/
if (s2->isOverloadable() && (a || s->isOverloadable()))
{ if (!a)
a = new OverloadSet();
/* Don't add to a[] if s2 is alias of previous sym
*/
for (int j = 0; j < a->a.dim; j++)
{ Dsymbol *s3 = a->a.tdata()[j];
if (s2->toAlias() == s3->toAlias())
{
if (s3->isDeprecated())
a->a.tdata()[j] = s2;
goto Lcontinue;
}
}
a->push(s2);
Lcontinue:
continue;
}
if (flags & 4) // if return NULL on ambiguity
return NULL;
if (!(flags & 2))
ss->multiplyDefined(loc, s, s2);
break;
}
}
}
}
/* Build special symbol if we had multiple finds
*/
if (a)
{ assert(s);
a->push(s);
s = a;
}
if (s)
{
Declaration *d = s->isDeclaration();
if (d && d->protection == PROTprivate &&
!d->parent->isTemplateMixin() &&
!(flags & 2))
error(loc, "%s is private", d->toPrettyChars());
}
}
return s;
}
void ScopeDsymbol::importScope(ScopeDsymbol *s, enum PROT protection)
{
//printf("%s->ScopeDsymbol::importScope(%s, %d)\n", toChars(), s->toChars(), protection);
// No circular or redundant import's
if (s != this)
{
if (!imports)
imports = new ScopeDsymbols();
else
{
for (int i = 0; i < imports->dim; i++)
{ ScopeDsymbol *ss;
ss = imports->tdata()[i];
if (ss == s) // if already imported
{
if (protection > prots[i])
prots[i] = protection; // upgrade access
return;
}
}
}
imports->push(s);
prots = (unsigned char *)mem.realloc(prots, imports->dim * sizeof(prots[0]));
prots[imports->dim - 1] = protection;
}
}
int ScopeDsymbol::isforwardRef()
{
return (members == NULL);
}
void ScopeDsymbol::defineRef(Dsymbol *s)
{
ScopeDsymbol *ss;
ss = s->isScopeDsymbol();
members = ss->members;
ss->members = NULL;
}
void ScopeDsymbol::multiplyDefined(Loc loc, Dsymbol *s1, Dsymbol *s2)
{
#if 0
printf("ScopeDsymbol::multiplyDefined()\n");
printf("s1 = %p, '%s' kind = '%s', parent = %s\n", s1, s1->toChars(), s1->kind(), s1->parent ? s1->parent->toChars() : "");
printf("s2 = %p, '%s' kind = '%s', parent = %s\n", s2, s2->toChars(), s2->kind(), s2->parent ? s2->parent->toChars() : "");
#endif
if (loc.filename)
{ ::error(loc, "%s at %s conflicts with %s at %s",
s1->toPrettyChars(),
s1->locToChars(),
s2->toPrettyChars(),
s2->locToChars());
}
else
{
s1->error(loc, "conflicts with %s %s at %s",
s2->kind(),
s2->toPrettyChars(),
s2->locToChars());
}
}
Dsymbol *ScopeDsymbol::nameCollision(Dsymbol *s)
{
Dsymbol *sprev;
// Look to see if we are defining a forward referenced symbol
sprev = symtab->lookup(s->ident);
assert(sprev);
if (s->equals(sprev)) // if the same symbol
{
if (s->isforwardRef()) // if second declaration is a forward reference
return sprev;
if (sprev->isforwardRef())
{
sprev->defineRef(s); // copy data from s into sprev
return sprev;
}
}
multiplyDefined(0, s, sprev);
return sprev;
}
const char *ScopeDsymbol::kind()
{
return "ScopeDsymbol";
}
Dsymbol *ScopeDsymbol::symtabInsert(Dsymbol *s)
{
return symtab->insert(s);
}
/***************************************
* Determine number of Dsymbols, folding in AttribDeclaration members.
*/
#if DMDV2
size_t ScopeDsymbol::dim(Dsymbols *members)
{
size_t n = 0;
if (members)
{
for (size_t i = 0; i < members->dim; i++)
{ Dsymbol *s = members->tdata()[i];
AttribDeclaration *a = s->isAttribDeclaration();
if (a)
{
n += dim(a->decl);
}
else
n++;
}
}
return n;
}
#endif
/***************************************
* Get nth Dsymbol, folding in AttribDeclaration members.
* Returns:
* Dsymbol* nth Dsymbol
* NULL not found, *pn gets incremented by the number
* of Dsymbols
*/
#if DMDV2
Dsymbol *ScopeDsymbol::getNth(Dsymbols *members, size_t nth, size_t *pn)
{
if (!members)
return NULL;