void ClassDeclaration::semantic(Scope *sc)
{
//printf("ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this);
//printf("\tparent = %p, '%s'\n", sc->parent, sc->parent ? sc->parent->toChars() : "");
//printf("sc->stc = %x\n", sc->stc);
//{ static int n; if (++n == 20) *(char*)0=0; }
if (!ident) // if anonymous class
{ const char *id = "__anonclass";
ident = Identifier::generateId(id);
}
if (!sc)
sc = scope;
if (!parent && sc->parent && !sc->parent->isModule())
parent = sc->parent;
type = type->semantic(loc, sc);
handle = type;
if (!members) // if forward reference
{ //printf("\tclass '%s' is forward referenced\n", toChars());
return;
}
if (symtab)
{ if (sizeok == SIZEOKdone || !scope)
{ //printf("\tsemantic for '%s' is already completed\n", toChars());
return; // semantic() already completed
}
}
else
symtab = new DsymbolTable();
Scope *scx = NULL;
if (scope)
{ sc = scope;
scx = scope; // save so we don't make redundant copies
scope = NULL;
}
unsigned dprogress_save = Module::dprogress;
int errors = global.gaggedErrors;
if (sc->stc & STCdeprecated)
{
isdeprecated = true;
}
userAttributes = sc->userAttributes;
if (sc->linkage == LINKcpp)
error("cannot create C++ classes");
// Expand any tuples in baseclasses[]
for (size_t i = 0; i < baseclasses->dim; )
{ BaseClass *b = (*baseclasses)[i];
b->type = b->type->semantic(loc, sc);
Type *tb = b->type->toBasetype();
if (tb->ty == Ttuple)
{ TypeTuple *tup = (TypeTuple *)tb;
enum PROT protection = b->protection;
baseclasses->remove(i);
size_t dim = Parameter::dim(tup->arguments);
for (size_t j = 0; j < dim; j++)
{ Parameter *arg = Parameter::getNth(tup->arguments, j);
b = new BaseClass(arg->type, protection);
baseclasses->insert(i + j, b);
}
}
else
i++;
}
// See if there's a base class as first in baseclasses[]
if (baseclasses->dim)
{ TypeClass *tc;
BaseClass *b;
Type *tb;
b = (*baseclasses)[0];
//b->type = b->type->semantic(loc, sc);
tb = b->type->toBasetype();
if (tb->ty != Tclass)
{ if (b->type != Type::terror)
error("base type must be class or interface, not %s", b->type->toChars());
baseclasses->remove(0);
}
else
{
tc = (TypeClass *)(tb);
if (tc->sym->isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = true;
tc->checkDeprecated(loc, sc);
}
}
if (tc->sym->isInterfaceDeclaration())
;
else
{
for (ClassDeclaration *cdb = tc->sym; cdb; cdb = cdb->baseClass)
{
if (cdb == this)
{
error("circular inheritance");
baseclasses->remove(0);
goto L7;
}
}
if (!tc->sym->symtab || tc->sym->sizeok == SIZEOKnone)
{ // Try to resolve forward reference
if (/*sc->mustsemantic &&*/ tc->sym->scope)
tc->sym->semantic(NULL);
}
if (!tc->sym->symtab || tc->sym->scope || tc->sym->sizeok == SIZEOKnone)
{
//printf("%s: forward reference of base class %s\n", toChars(), tc->sym->toChars());
//error("forward reference of base class %s", baseClass->toChars());
// Forward reference of base class, try again later
//printf("\ttry later, forward reference of base class %s\n", tc->sym->toChars());
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
if (tc->sym->scope)
tc->sym->scope->module->addDeferredSemantic(tc->sym);
scope->module->addDeferredSemantic(this);
return;
}
else
{ baseClass = tc->sym;
b->base = baseClass;
}
L7: ;
}
}
}
// Treat the remaining entries in baseclasses as interfaces
// Check for errors, handle forward references
for (size_t i = (baseClass ? 1 : 0); i < baseclasses->dim; )
{ TypeClass *tc;
BaseClass *b;
Type *tb;
b = (*baseclasses)[i];
b->type = b->type->semantic(loc, sc);
tb = b->type->toBasetype();
if (tb->ty == Tclass)
tc = (TypeClass *)tb;
else
tc = NULL;
if (!tc || !tc->sym->isInterfaceDeclaration())
{ if (b->type != Type::terror)
error("base type must be interface, not %s", b->type->toChars());
baseclasses->remove(i);
continue;
}
else
{
if (tc->sym->isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = true;
tc->checkDeprecated(loc, sc);
}
}
// Check for duplicate interfaces
for (size_t j = (baseClass ? 1 : 0); j < i; j++)
{
BaseClass *b2 = (*baseclasses)[j];
if (b2->base == tc->sym)
error("inherits from duplicate interface %s", b2->base->toChars());
}
if (!tc->sym->symtab)
{ // Try to resolve forward reference
if (/*sc->mustsemantic &&*/ tc->sym->scope)
tc->sym->semantic(NULL);
}
b->base = tc->sym;
if (!b->base->symtab || b->base->scope)
{
//error("forward reference of base class %s", baseClass->toChars());
// Forward reference of base, try again later
//printf("\ttry later, forward reference of base %s\n", baseClass->toChars());
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
if (tc->sym->scope)
tc->sym->scope->module->addDeferredSemantic(tc->sym);
scope->module->addDeferredSemantic(this);
return;
}
}
i++;
}
// If no base class, and this is not an Object, use Object as base class
if (!baseClass && ident != Id::Object)
{
if (!object)
{
error("missing or corrupt object.d");
fatal();
}
Type *t = object->type;
t = t->semantic(loc, sc)->toBasetype();
assert(t->ty == Tclass);
TypeClass *tc = (TypeClass *)t;
BaseClass *b = new BaseClass(tc, PROTpublic);
baseclasses->shift(b);
baseClass = tc->sym;
assert(!baseClass->isInterfaceDeclaration());
b->base = baseClass;
}
interfaces_dim = baseclasses->dim;
interfaces = baseclasses->tdata();
if (baseClass)
{
if (baseClass->storage_class & STCfinal)
error("cannot inherit from final class %s", baseClass->toChars());
interfaces_dim--;
interfaces++;
// Copy vtbl[] from base class
vtbl.setDim(baseClass->vtbl.dim);
memcpy(vtbl.tdata(), baseClass->vtbl.tdata(), sizeof(void *) * vtbl.dim);
// Inherit properties from base class
com = baseClass->isCOMclass();
isscope = baseClass->isscope;
vthis = baseClass->vthis;
storage_class |= baseClass->storage_class & STC_TYPECTOR;
}
else
{
// No base class, so this is the root of the class hierarchy
vtbl.setDim(0);
vtbl.push(this); // leave room for classinfo as first member
}
protection = sc->protection;
storage_class |= sc->stc;
if (sizeok == SIZEOKnone)
{
interfaceSemantic(sc);
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->addMember(sc, this, 1);
}
/* If this is a nested class, add the hidden 'this'
* member which is a pointer to the enclosing scope.
*/
if (vthis) // if inheriting from nested class
{ // Use the base class's 'this' member
isnested = true;
if (storage_class & STCstatic)
error("static class cannot inherit from nested class %s", baseClass->toChars());
if (toParent2() != baseClass->toParent2() &&
(!toParent2() ||
!baseClass->toParent2()->getType() ||
!baseClass->toParent2()->getType()->isBaseOf(toParent2()->getType(), NULL)))
{
if (toParent2())
{
error("is nested within %s, but super class %s is nested within %s",
toParent2()->toChars(),
baseClass->toChars(),
baseClass->toParent2()->toChars());
}
else
{
error("is not nested, but super class %s is nested within %s",
baseClass->toChars(),
baseClass->toParent2()->toChars());
}
isnested = false;
}
}
else if (!(storage_class & STCstatic))
{ Dsymbol *s = toParent2();
if (s)
{
AggregateDeclaration *ad = s->isClassDeclaration();
FuncDeclaration *fd = s->isFuncDeclaration();
if (ad || fd)
{ isnested = true;
Type *t;
if (ad)
t = ad->handle;
else if (fd)
{ AggregateDeclaration *ad2 = fd->isMember2();
if (ad2)
t = ad2->handle;
else
{
t = Type::tvoidptr;
}
}
else
assert(0);
if (t->ty == Tstruct) // ref to struct
t = Type::tvoidptr;
assert(!vthis);
vthis = new ThisDeclaration(loc, t);
members->push(vthis);
}
}
}
}
if (storage_class & STCauto)
error("storage class 'auto' is invalid when declaring a class, did you mean to use 'scope'?");
if (storage_class & STCscope)
isscope = 1;
if (storage_class & STCabstract)
isabstract = 1;
sc = sc->push(this);
//sc->stc &= ~(STCfinal | STCauto | STCscope | STCstatic | STCabstract | STCdeprecated | STC_TYPECTOR | STCtls | STCgshared);
//sc->stc |= storage_class & STC_TYPECTOR;
sc->stc &= STCsafe | STCtrusted | STCsystem;
sc->parent = this;
sc->inunion = 0;
if (isCOMclass())
{
#if IN_LLVM
if (global.params.targetTriple.isOSWindows())
#else
if (global.params.isWindows)
#endif
sc->linkage = LINKwindows;
else
/* This enables us to use COM objects under Linux and
* work with things like XPCOM
*/
sc->linkage = LINKc;
}
sc->protection = PROTpublic;
sc->explicitProtection = 0;
sc->structalign = STRUCTALIGN_DEFAULT;
if (baseClass)
{ sc->offset = baseClass->structsize;
alignsize = baseClass->alignsize;
// if (isnested)
// sc->offset += PTRSIZE; // room for uplevel context pointer
}
else
{ sc->offset = PTRSIZE * 2; // allow room for __vptr and __monitor
alignsize = PTRSIZE;
}
sc->userAttributes = NULL;
structsize = sc->offset;
Scope scsave = *sc;
size_t members_dim = members->dim;
sizeok = SIZEOKnone;
/* Set scope so if there are forward references, we still might be able to
* resolve individual members like enums.
*/
for (size_t i = 0; i < members_dim; i++)
{ Dsymbol *s = (*members)[i];
/* There are problems doing this in the general case because
* Scope keeps track of things like 'offset'
*/
if (s->isEnumDeclaration() ||
(s->isAggregateDeclaration() && s->ident) ||
s->isTemplateMixin() ||
s->isAttribDeclaration() ||
s->isAliasDeclaration())
{
//printf("[%d] setScope %s %s, sc = %p\n", i, s->kind(), s->toChars(), sc);
s->setScope(sc);
}
}
for (size_t i = 0; i < members_dim; i++)
{ Dsymbol *s = (*members)[i];
s->semantic(sc);
}
// Set the offsets of the fields and determine the size of the class
unsigned offset = structsize;
bool isunion = isUnionDeclaration() != NULL;
for (size_t i = 0; i < members->dim; i++)
{ Dsymbol *s = (*members)[i];
s->setFieldOffset(this, &offset, false);
}
sc->offset = structsize;
if (global.gag && global.gaggedErrors != errors)
{ // The type is no good, yet the error messages were gagged.
type = Type::terror;
}
if (sizeok == SIZEOKfwd) // failed due to forward references
{ // semantic() failed due to forward references
// Unwind what we did, and defer it for later
for (size_t i = 0; i < fields.dim; i++)
{ Dsymbol *s = fields[i];
VarDeclaration *vd = s->isVarDeclaration();
if (vd)
vd->offset = 0;
}
fields.setDim(0);
structsize = 0;
alignsize = 0;
// structalign = 0;
sc = sc->pop();
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
scope->module->addDeferredSemantic(this);
Module::dprogress = dprogress_save;
//printf("\tsemantic('%s') failed due to forward references\n", toChars());
return;
}
//printf("\tsemantic('%s') successful\n", toChars());
//members->print();
/* Look for special member functions.
* They must be in this class, not in a base class.
*/
ctor = search(0, Id::ctor, 0);
#if DMDV1
if (ctor && (ctor->toParent() != this || !ctor->isCtorDeclaration()))
ctor = NULL;
#else
if (ctor && (ctor->toParent() != this || !(ctor->isCtorDeclaration() || ctor->isTemplateDeclaration())))
ctor = NULL; // search() looks through ancestor classes
#endif
// dtor = (DtorDeclaration *)search(Id::dtor, 0);
// if (dtor && dtor->toParent() != this)
// dtor = NULL;
// inv = (InvariantDeclaration *)search(Id::classInvariant, 0);
// if (inv && inv->toParent() != this)
// inv = NULL;
// Can be in base class
aggNew = (NewDeclaration *)search(0, Id::classNew, 0);
aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0);
// If this class has no constructor, but base class does, create
// a constructor:
// this() { }
if (!ctor && baseClass && baseClass->ctor)
{
//printf("Creating default this(){} for class %s\n", toChars());
Type *tf = new TypeFunction(NULL, NULL, 0, LINKd, 0);
CtorDeclaration *ctor = new CtorDeclaration(loc, 0, 0, tf);
ctor->isImplicit = true;
ctor->fbody = new CompoundStatement(0, new Statements());
members->push(ctor);
ctor->addMember(sc, this, 1);
*sc = scsave; // why? What about sc->nofree?
ctor->semantic(sc);
this->ctor = ctor;
defaultCtor = ctor;
}
#if 0
if (baseClass)
{ if (!aggDelete)
aggDelete = baseClass->aggDelete;
if (!aggNew)
aggNew = baseClass->aggNew;
}
#endif
// Allocate instance of each new interface
sc->offset = structsize;
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (*vtblInterfaces)[i];
unsigned thissize = PTRSIZE;
alignmember(STRUCTALIGN_DEFAULT, thissize, &sc->offset);
assert(b->offset == 0);
b->offset = sc->offset;
// Take care of single inheritance offsets
while (b->baseInterfaces_dim)
{
b = &b->baseInterfaces[0];
b->offset = sc->offset;
}
sc->offset += thissize;
if (alignsize < thissize)
alignsize = thissize;
}
structsize = sc->offset;
#if IN_LLVM
if (sc->structalign == STRUCTALIGN_DEFAULT)
structsize = (structsize + alignsize - 1) & ~(alignsize - 1);
else
structsize = (structsize + sc->structalign - 1) & ~(sc->structalign - 1);
#endif
sizeok = SIZEOKdone;
Module::dprogress++;
dtor = buildDtor(sc);
if (Dsymbol *assign = search_function(this, Id::assign))
{
if (FuncDeclaration *f = hasIdentityOpAssign(sc, assign))
{
if (!(f->storage_class & STCdisable))
error("identity assignment operator overload is illegal");
}
}
sc->pop();
#if 0 // Do not call until toObjfile() because of forward references
// Fill in base class vtbl[]s
for (i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (*vtblInterfaces)[i];
//b->fillVtbl(this, &b->vtbl, 1);
}
#endif
//printf("-ClassDeclaration::semantic(%s), type = %p\n", toChars(), type);
if (deferred && !global.gag)
{
deferred->semantic2(sc);
deferred->semantic3(sc);
}
}
void ClassDeclaration::semantic(Scope *sc)
{
//printf("ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this);
//printf("\tparent = %p, '%s'\n", sc->parent, sc->parent ? sc->parent->toChars() : "");
//printf("sc->stc = %x\n", sc->stc);
//{ static int n; if (++n == 20) *(char*)0=0; }
if (!ident) // if anonymous class
{ const char *id = "__anonclass";
ident = Identifier::generateId(id);
}
if (!sc)
sc = scope;
if (!parent && sc->parent && !sc->parent->isModule())
parent = sc->parent;
type = type->semantic(loc, sc);
if (type->ty == Tclass && ((TypeClass *)type)->sym != this)
{
TemplateInstance *ti = ((TypeClass *)type)->sym->isInstantiated();
if (ti && ti->errors)
((TypeClass *)type)->sym = this;
}
if (!members) // if opaque declaration
{ //printf("\tclass '%s' is forward referenced\n", toChars());
return;
}
if (symtab)
{ if (sizeok == SIZEOKdone || !scope)
{ //printf("\tsemantic for '%s' is already completed\n", toChars());
return; // semantic() already completed
}
}
else
symtab = new DsymbolTable();
Scope *scx = NULL;
if (scope)
{
sc = scope;
scx = scope; // save so we don't make redundant copies
scope = NULL;
}
unsigned dprogress_save = Module::dprogress;
int errors = global.errors;
if (sc->stc & STCdeprecated)
{
isdeprecated = true;
}
userAttribDecl = sc->userAttribDecl;
if (sc->linkage == LINKcpp)
cpp = 1;
// Expand any tuples in baseclasses[]
for (size_t i = 0; i < baseclasses->dim; )
{
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
BaseClass *b = (*baseclasses)[i];
b->type = b->type->semantic(loc, sc);
Type *tb = b->type->toBasetype();
if (tb->ty == Ttuple)
{ TypeTuple *tup = (TypeTuple *)tb;
PROT protection = b->protection;
baseclasses->remove(i);
size_t dim = Parameter::dim(tup->arguments);
for (size_t j = 0; j < dim; j++)
{ Parameter *arg = Parameter::getNth(tup->arguments, j);
b = new BaseClass(arg->type, protection);
baseclasses->insert(i + j, b);
}
}
else
i++;
}
// See if there's a base class as first in baseclasses[]
if (baseclasses->dim)
{
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
BaseClass *b = (*baseclasses)[0];
//b->type = b->type->semantic(loc, sc);
Type *tb = b->type->toBasetype();
if (tb->ty != Tclass)
{
if (b->type != Type::terror)
error("base type must be class or interface, not %s", b->type->toChars());
baseclasses->remove(0);
}
else
{
TypeClass *tc = (TypeClass *)(tb);
if (tc->sym->isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = true;
tc->checkDeprecated(loc, sc);
}
}
if (tc->sym->isInterfaceDeclaration())
;
else
{
for (ClassDeclaration *cdb = tc->sym; cdb; cdb = cdb->baseClass)
{
if (cdb == this)
{
error("circular inheritance");
baseclasses->remove(0);
goto L7;
}
}
if (tc->sym->scope)
{
// Try to resolve forward reference
tc->sym->semantic(NULL);
}
if (tc->sym->symtab && tc->sym->scope == NULL)
{
/* Bugzilla 11034: Essentailly, class inheritance hierarchy
* and instance size of each classes are orthogonal information.
* Therefore, even if tc->sym->sizeof == SIZEOKnone,
* we need to set baseClass field for class covariance check.
*/
baseClass = tc->sym;
b->base = baseClass;
}
if (!tc->sym->symtab || tc->sym->scope || tc->sym->sizeok == SIZEOKnone)
{
//printf("%s: forward reference of base class %s\n", toChars(), tc->sym->toChars());
//error("forward reference of base class %s", baseClass->toChars());
// Forward reference of base class, try again later
//printf("\ttry later, forward reference of base class %s\n", tc->sym->toChars());
scope = scx ? scx : sc->copy();
scope->setNoFree();
if (tc->sym->scope)
tc->sym->scope->module->addDeferredSemantic(tc->sym);
scope->module->addDeferredSemantic(this);
return;
}
L7: ;
}
}
}
// Treat the remaining entries in baseclasses as interfaces
// Check for errors, handle forward references
for (size_t i = (baseClass ? 1 : 0); i < baseclasses->dim; )
{
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
BaseClass *b = (*baseclasses)[i];
b->type = b->type->semantic(loc, sc);
Type *tb = b->type->toBasetype();
TypeClass *tc = (tb->ty == Tclass) ? (TypeClass *)tb : NULL;
if (!tc || !tc->sym->isInterfaceDeclaration())
{
if (b->type != Type::terror)
error("base type must be interface, not %s", b->type->toChars());
baseclasses->remove(i);
continue;
}
else
{
if (tc->sym->isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = true;
tc->checkDeprecated(loc, sc);
}
}
// Check for duplicate interfaces
for (size_t j = (baseClass ? 1 : 0); j < i; j++)
{
BaseClass *b2 = (*baseclasses)[j];
if (b2->base == tc->sym)
error("inherits from duplicate interface %s", b2->base->toChars());
}
if (tc->sym->scope)
{
// Try to resolve forward reference
tc->sym->semantic(NULL);
}
b->base = tc->sym;
if (!b->base->symtab || b->base->scope)
{
//error("forward reference of base class %s", baseClass->toChars());
// Forward reference of base, try again later
//printf("\ttry later, forward reference of base %s\n", baseClass->toChars());
scope = scx ? scx : sc->copy();
scope->setNoFree();
if (tc->sym->scope)
tc->sym->scope->module->addDeferredSemantic(tc->sym);
scope->module->addDeferredSemantic(this);
return;
}
}
i++;
}
if (doAncestorsSemantic == SemanticIn)
doAncestorsSemantic = SemanticDone;
if (sizeok == SIZEOKnone)
{
// If no base class, and this is not an Object, use Object as base class
if (!baseClass && ident != Id::Object && !cpp)
{
if (!object)
{
error("missing or corrupt object.d");
fatal();
}
Type *t = object->type;
t = t->semantic(loc, sc)->toBasetype();
assert(t->ty == Tclass);
TypeClass *tc = (TypeClass *)t;
BaseClass *b = new BaseClass(tc, PROTpublic);
baseclasses->shift(b);
baseClass = tc->sym;
assert(!baseClass->isInterfaceDeclaration());
b->base = baseClass;
}
interfaces_dim = baseclasses->dim;
interfaces = baseclasses->tdata();
if (baseClass)
{
if (baseClass->storage_class & STCfinal)
error("cannot inherit from final class %s", baseClass->toChars());
interfaces_dim--;
interfaces++;
// Copy vtbl[] from base class
vtbl.setDim(baseClass->vtbl.dim);
memcpy(vtbl.tdata(), baseClass->vtbl.tdata(), sizeof(void *) * vtbl.dim);
// Inherit properties from base class
com = baseClass->isCOMclass();
if (baseClass->isCPPclass())
cpp = 1;
isscope = baseClass->isscope;
vthis = baseClass->vthis;
enclosing = baseClass->enclosing;
storage_class |= baseClass->storage_class & STC_TYPECTOR;
}
else
{
// No base class, so this is the root of the class hierarchy
vtbl.setDim(0);
if (vtblOffset())
vtbl.push(this); // leave room for classinfo as first member
}
protection = sc->protection;
storage_class |= sc->stc;
interfaceSemantic(sc);
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->addMember(sc, this, 1);
}
/* If this is a nested class, add the hidden 'this'
* member which is a pointer to the enclosing scope.
*/
if (vthis) // if inheriting from nested class
{
// Use the base class's 'this' member
if (storage_class & STCstatic)
error("static class cannot inherit from nested class %s", baseClass->toChars());
if (toParent2() != baseClass->toParent2() &&
(!toParent2() ||
!baseClass->toParent2()->getType() ||
!baseClass->toParent2()->getType()->isBaseOf(toParent2()->getType(), NULL)))
{
if (toParent2())
{
error("is nested within %s, but super class %s is nested within %s",
toParent2()->toChars(),
baseClass->toChars(),
baseClass->toParent2()->toChars());
}
else
{
error("is not nested, but super class %s is nested within %s",
baseClass->toChars(),
baseClass->toParent2()->toChars());
}
enclosing = NULL;
}
}
else
makeNested();
if (storage_class & STCauto)
error("storage class 'auto' is invalid when declaring a class, did you mean to use 'scope'?");
if (storage_class & STCscope)
isscope = true;
if (storage_class & STCabstract)
isabstract = 1;
}
sc = sc->push(this);
//sc->stc &= ~(STCfinal | STCauto | STCscope | STCstatic | STCabstract | STCdeprecated | STC_TYPECTOR | STCtls | STCgshared);
//sc->stc |= storage_class & STC_TYPECTOR;
sc->stc &= STCsafe | STCtrusted | STCsystem;
sc->parent = this;
sc->inunion = 0;
if (isCOMclass())
{
if (global.params.isWindows)
sc->linkage = LINKwindows;
else
/* This enables us to use COM objects under Linux and
* work with things like XPCOM
*/
sc->linkage = LINKc;
}
sc->protection = PROTpublic;
sc->explicitProtection = 0;
sc->structalign = STRUCTALIGN_DEFAULT;
if (baseClass)
{
sc->offset = baseClass->structsize;
alignsize = baseClass->alignsize;
sc->offset = (sc->offset + alignsize - 1) & ~(alignsize - 1);
// if (enclosing)
// sc->offset += Target::ptrsize; // room for uplevel context pointer
}
else
{
if (cpp)
sc->offset = Target::ptrsize; // allow room for __vptr
else
sc->offset = Target::ptrsize * 2; // allow room for __vptr and __monitor
alignsize = Target::ptrsize;
}
sc->userAttribDecl = NULL;
structsize = sc->offset;
Scope scsave = *sc;
size_t members_dim = members->dim;
sizeok = SIZEOKnone;
/* Set scope so if there are forward references, we still might be able to
* resolve individual members like enums.
*/
for (size_t i = 0; i < members_dim; i++)
{
Dsymbol *s = (*members)[i];
//printf("[%d] setScope %s %s, sc = %p\n", i, s->kind(), s->toChars(), sc);
s->setScope(sc);
}
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->importAll(sc);
}
for (size_t i = 0; i < members_dim; i++)
{
Dsymbol *s = (*members)[i];
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
s->semantic(sc);
}
// Set the offsets of the fields and determine the size of the class
unsigned offset = structsize;
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->setFieldOffset(this, &offset, false);
}
sc->offset = structsize;
if (global.errors != errors)
{
// The type is no good.
type = Type::terror;
}
if (sizeok == SIZEOKfwd) // failed due to forward references
{
// semantic() failed due to forward references
// Unwind what we did, and defer it for later
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration *v = fields[i];
v->offset = 0;
}
fields.setDim(0);
structsize = 0;
alignsize = 0;
// structalign = 0;
sc = sc->pop();
scope = scx ? scx : sc->copy();
scope->setNoFree();
scope->module->addDeferredSemantic(this);
Module::dprogress = dprogress_save;
//printf("\tsemantic('%s') failed due to forward references\n", toChars());
return;
}
//printf("\tsemantic('%s') successful\n", toChars());
//members->print();
/* Look for special member functions.
* They must be in this class, not in a base class.
*/
searchCtor();
if (ctor && (ctor->toParent() != this || !(ctor->isCtorDeclaration() || ctor->isTemplateDeclaration())))
ctor = NULL; // search() looks through ancestor classes
if (!ctor && noDefaultCtor)
{
// A class object is always created by constructor, so this check is legitimate.
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration *v = fields[i];
if (v->storage_class & STCnodefaultctor)
::error(v->loc, "field %s must be initialized in constructor", v->toChars());
}
}
inv = buildInv(this, sc);
// Can be in base class
aggNew = (NewDeclaration *)search(Loc(), Id::classNew);
aggDelete = (DeleteDeclaration *)search(Loc(), Id::classDelete);
// If this class has no constructor, but base class has a default
// ctor, create a constructor:
// this() { }
if (!ctor && baseClass && baseClass->ctor)
{
FuncDeclaration *fd = resolveFuncCall(loc, sc, baseClass->ctor, NULL, NULL, NULL, 1);
if (fd && !fd->errors)
{
//printf("Creating default this(){} for class %s\n", toChars());
TypeFunction *btf = (TypeFunction *)fd->type;
TypeFunction *tf = new TypeFunction(NULL, NULL, 0, LINKd, fd->storage_class);
tf->purity = btf->purity;
tf->isnothrow = btf->isnothrow;
tf->trust = btf->trust;
CtorDeclaration *ctor = new CtorDeclaration(loc, Loc(), 0, tf);
ctor->fbody = new CompoundStatement(Loc(), new Statements());
members->push(ctor);
ctor->addMember(sc, this, 1);
*sc = scsave; // why? What about sc->nofree?
ctor->semantic(sc);
this->ctor = ctor;
defaultCtor = ctor;
}
else
{
error("Cannot implicitly generate a default ctor when base class %s is missing a default ctor", baseClass->toPrettyChars());
}
}
#if 0
if (baseClass)
{ if (!aggDelete)
aggDelete = baseClass->aggDelete;
if (!aggNew)
aggNew = baseClass->aggNew;
}
#endif
// Allocate instance of each new interface
sc->offset = structsize;
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (*vtblInterfaces)[i];
unsigned thissize = Target::ptrsize;
alignmember(STRUCTALIGN_DEFAULT, thissize, &sc->offset);
assert(b->offset == 0);
b->offset = sc->offset;
// Take care of single inheritance offsets
while (b->baseInterfaces_dim)
{
b = &b->baseInterfaces[0];
b->offset = sc->offset;
}
sc->offset += thissize;
if (alignsize < thissize)
alignsize = thissize;
}
structsize = sc->offset;
sizeok = SIZEOKdone;
Module::dprogress++;
dtor = buildDtor(this, sc);
if (FuncDeclaration *f = hasIdentityOpAssign(this, sc))
{
if (!(f->storage_class & STCdisable))
error(f->loc, "identity assignment operator overload is illegal");
}
sc->pop();
#if 0 // Do not call until toObjfile() because of forward references
// Fill in base class vtbl[]s
for (i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (*vtblInterfaces)[i];
//b->fillVtbl(this, &b->vtbl, 1);
}
#endif
//printf("-ClassDeclaration::semantic(%s), type = %p\n", toChars(), type);
if (deferred && !global.gag)
{
deferred->semantic2(sc);
deferred->semantic3(sc);
}
#if 0
if (type->ty == Tclass && ((TypeClass *)type)->sym != this)
{
printf("this = %p %s\n", this, this->toChars());
printf("type = %d sym = %p\n", type->ty, ((TypeClass *)type)->sym);
}
#endif
assert(type->ty != Tclass || ((TypeClass *)type)->sym == this);
}
void ClassDeclaration::semantic(Scope *sc)
{
//printf("ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this);
//printf("\tparent = %p, '%s'\n", sc->parent, sc->parent ? sc->parent->toChars() : "");
//printf("sc->stc = %x\n", sc->stc);
//{ static int n; if (++n == 20) *(char*)0=0; }
if (!ident) // if anonymous class
{ const char *id = "__anonclass";
ident = Identifier::generateId(id);
}
if (!sc)
sc = scope;
if (!parent && sc->parent && !sc->parent->isModule())
parent = sc->parent;
type = type->semantic(loc, sc);
handle = type;
if (!members) // if forward reference
{ //printf("\tclass '%s' is forward referenced\n", toChars());
return;
}
if (symtab)
{ if (sizeok == 1 || !scope)
{ //printf("\tsemantic for '%s' is already completed\n", toChars());
return; // semantic() already completed
}
}
else
symtab = new DsymbolTable();
Scope *scx = NULL;
if (scope)
{ sc = scope;
scx = scope; // save so we don't make redundant copies
scope = NULL;
}
unsigned dprogress_save = Module::dprogress;
#ifdef IN_GCC
if (attributes)
attributes->append(sc->attributes);
else
attributes = sc->attributes;
methods.setDim(0);
#endif
if (sc->stc & STCdeprecated)
{
isdeprecated = 1;
}
// Expand any tuples in baseclasses[]
for (size_t i = 0; i < baseclasses->dim; )
{ BaseClass *b = (BaseClass *)baseclasses->data[i];
b->type = b->type->semantic(loc, sc);
Type *tb = b->type->toBasetype();
if (tb->ty == Ttuple)
{ TypeTuple *tup = (TypeTuple *)tb;
enum PROT protection = b->protection;
baseclasses->remove(i);
size_t dim = Parameter::dim(tup->arguments);
for (size_t j = 0; j < dim; j++)
{ Parameter *arg = Parameter::getNth(tup->arguments, j);
b = new BaseClass(arg->type, protection);
baseclasses->insert(i + j, b);
}
}
else
i++;
}
// See if there's a base class as first in baseclasses[]
if (baseclasses->dim)
{ TypeClass *tc;
BaseClass *b;
Type *tb;
b = (BaseClass *)baseclasses->data[0];
//b->type = b->type->semantic(loc, sc);
tb = b->type->toBasetype();
if (tb->ty != Tclass)
{ error("base type must be class or interface, not %s", b->type->toChars());
baseclasses->remove(0);
}
else
{
tc = (TypeClass *)(tb);
if (tc->sym->isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = 1;
tc->checkDeprecated(loc, sc);
}
}
if (tc->sym->isInterfaceDeclaration())
;
else
{
for (ClassDeclaration *cdb = tc->sym; cdb; cdb = cdb->baseClass)
{
if (cdb == this)
{
error("circular inheritance");
baseclasses->remove(0);
goto L7;
}
}
if (!tc->sym->symtab || tc->sym->sizeok == 0)
{ // Try to resolve forward reference
if (/*sc->mustsemantic &&*/ tc->sym->scope)
tc->sym->semantic(NULL);
}
if (!tc->sym->symtab || tc->sym->scope || tc->sym->sizeok == 0)
{
//printf("%s: forward reference of base class %s\n", toChars(), tc->sym->toChars());
//error("forward reference of base class %s", baseClass->toChars());
// Forward reference of base class, try again later
//printf("\ttry later, forward reference of base class %s\n", tc->sym->toChars());
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
if (tc->sym->scope)
tc->sym->scope->module->addDeferredSemantic(tc->sym);
scope->module->addDeferredSemantic(this);
return;
}
else
{ baseClass = tc->sym;
b->base = baseClass;
}
L7: ;
}
}
}
// Treat the remaining entries in baseclasses as interfaces
// Check for errors, handle forward references
for (size_t i = (baseClass ? 1 : 0); i < baseclasses->dim; )
{ TypeClass *tc;
BaseClass *b;
Type *tb;
b = (BaseClass *)baseclasses->data[i];
b->type = b->type->semantic(loc, sc);
tb = b->type->toBasetype();
if (tb->ty == Tclass)
tc = (TypeClass *)tb;
else
tc = NULL;
if (!tc || !tc->sym->isInterfaceDeclaration())
{
error("base type must be interface, not %s", b->type->toChars());
baseclasses->remove(i);
continue;
}
else
{
if (tc->sym->isDeprecated())
{
if (!isDeprecated())
{
// Deriving from deprecated class makes this one deprecated too
isdeprecated = 1;
tc->checkDeprecated(loc, sc);
}
}
// Check for duplicate interfaces
for (size_t j = (baseClass ? 1 : 0); j < i; j++)
{
BaseClass *b2 = (BaseClass *)baseclasses->data[j];
if (b2->base == tc->sym)
error("inherits from duplicate interface %s", b2->base->toChars());
}
if (!tc->sym->symtab)
{ // Try to resolve forward reference
if (/*sc->mustsemantic &&*/ tc->sym->scope)
tc->sym->semantic(NULL);
}
b->base = tc->sym;
if (!b->base->symtab || b->base->scope)
{
//error("forward reference of base class %s", baseClass->toChars());
// Forward reference of base, try again later
//printf("\ttry later, forward reference of base %s\n", baseClass->toChars());
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
if (tc->sym->scope)
tc->sym->scope->module->addDeferredSemantic(tc->sym);
scope->module->addDeferredSemantic(this);
return;
}
}
i++;
}
// If no base class, and this is not an Object, use Object as base class
if (!baseClass && ident != Id::Object)
{
// BUG: what if Object is redefined in an inner scope?
Type *tbase = new TypeIdentifier(0, Id::Object);
BaseClass *b;
TypeClass *tc;
Type *bt;
if (!object)
{
error("missing or corrupt object.d");
fatal();
}
bt = tbase->semantic(loc, sc)->toBasetype();
b = new BaseClass(bt, PROTpublic);
baseclasses->shift(b);
assert(b->type->ty == Tclass);
tc = (TypeClass *)(b->type);
baseClass = tc->sym;
assert(!baseClass->isInterfaceDeclaration());
b->base = baseClass;
}
interfaces_dim = baseclasses->dim;
interfaces = (BaseClass **)baseclasses->data;
if (baseClass)
{
if (baseClass->storage_class & STCfinal)
error("cannot inherit from final class %s", baseClass->toChars());
interfaces_dim--;
interfaces++;
// Copy vtbl[] from base class
vtbl.setDim(baseClass->vtbl.dim);
memcpy(vtbl.data, baseClass->vtbl.data, sizeof(void *) * vtbl.dim);
// Inherit properties from base class
com = baseClass->isCOMclass();
isscope = baseClass->isscope;
vthis = baseClass->vthis;
}
else
{
// No base class, so this is the root of the class hierarchy
vtbl.setDim(0);
vtbl.push(this); // leave room for classinfo as first member
}
protection = sc->protection;
storage_class |= sc->stc;
if (sizeok == 0)
{
interfaceSemantic(sc);
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (Dsymbol *)members->data[i];
s->addMember(sc, this, 1);
}
/* If this is a nested class, add the hidden 'this'
* member which is a pointer to the enclosing scope.
*/
if (vthis) // if inheriting from nested class
{ // Use the base class's 'this' member
isnested = 1;
if (storage_class & STCstatic)
error("static class cannot inherit from nested class %s", baseClass->toChars());
if (toParent2() != baseClass->toParent2())
{
if (toParent2())
{
error("is nested within %s, but super class %s is nested within %s",
toParent2()->toChars(),
baseClass->toChars(),
baseClass->toParent2()->toChars());
}
else
{
error("is not nested, but super class %s is nested within %s",
baseClass->toChars(),
baseClass->toParent2()->toChars());
}
isnested = 0;
}
}
else if (!(storage_class & STCstatic))
{ Dsymbol *s = toParent2();
if (s)
{
AggregateDeclaration *ad = s->isClassDeclaration();
FuncDeclaration *fd = s->isFuncDeclaration();
if (ad || fd)
{ isnested = 1;
Type *t;
if (ad)
t = ad->handle;
else if (fd)
{ AggregateDeclaration *ad2 = fd->isMember2();
if (ad2)
t = ad2->handle;
else
{
t = new TypePointer(Type::tvoid);
t = t->semantic(0, sc);
}
}
else
assert(0);
assert(!vthis);
vthis = new ThisDeclaration(loc, t);
members->push(vthis);
}
}
}
}
if (storage_class & STCauto)
error("storage class 'auto' is invalid when declaring a class, did you mean to use 'scope'?");
if (storage_class & STCscope)
isscope = 1;
if (storage_class & STCabstract)
isabstract = 1;
sc = sc->push(this);
sc->stc &= STCsafe | STCtrusted | STCsystem;
#if IN_GCC
sc->attributes = NULL;
#endif
sc->parent = this;
sc->inunion = 0;
if (isCOMclass())
{
#if _WIN32
sc->linkage = LINKwindows;
#else
/* This enables us to use COM objects under Linux and
* work with things like XPCOM
*/
sc->linkage = LINKc;
#endif
}
sc->protection = PROTpublic;
sc->explicitProtection = 0;
sc->structalign = 8;
structalign = sc->structalign;
if (baseClass)
{ sc->offset = baseClass->structsize;
alignsize = baseClass->alignsize;
// if (isnested)
// sc->offset += PTRSIZE; // room for uplevel context pointer
}
else
{ sc->offset = PTRSIZE * 2; // allow room for __vptr and __monitor
alignsize = PTRSIZE;
}
structsize = sc->offset;
Scope scsave = *sc;
size_t members_dim = members->dim;
sizeok = 0;
/* Set scope so if there are forward references, we still might be able to
* resolve individual members like enums.
*/
for (size_t i = 0; i < members_dim; i++)
{ Dsymbol *s = (Dsymbol *)members->data[i];
/* There are problems doing this in the general case because
* Scope keeps track of things like 'offset'
*/
if (s->isEnumDeclaration() || (s->isAggregateDeclaration() && s->ident))
{
//printf("setScope %s %s\n", s->kind(), s->toChars());
s->setScope(sc);
}
}
for (size_t i = 0; i < members_dim; i++)
{ Dsymbol *s = (Dsymbol *)members->data[i];
s->semantic(sc);
}
if (sizeok == 2)
{ // semantic() failed because of forward references.
// Unwind what we did, and defer it for later
fields.setDim(0);
structsize = 0;
alignsize = 0;
structalign = 0;
sc = sc->pop();
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
scope->module->addDeferredSemantic(this);
Module::dprogress = dprogress_save;
//printf("\tsemantic('%s') failed due to forward references\n", toChars());
return;
}
//printf("\tsemantic('%s') successful\n", toChars());
structsize = sc->offset;
//members->print();
/* Look for special member functions.
* They must be in this class, not in a base class.
*/
ctor = (CtorDeclaration *)search(0, Id::ctor, 0);
if (ctor && (ctor->toParent() != this || !ctor->isCtorDeclaration()))
ctor = NULL;
// dtor = (DtorDeclaration *)search(Id::dtor, 0);
// if (dtor && dtor->toParent() != this)
// dtor = NULL;
// inv = (InvariantDeclaration *)search(Id::classInvariant, 0);
// if (inv && inv->toParent() != this)
// inv = NULL;
// Can be in base class
aggNew = (NewDeclaration *)search(0, Id::classNew, 0);
aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0);
// If this class has no constructor, but base class does, create
// a constructor:
// this() { }
if (!ctor && baseClass && baseClass->ctor)
{
//printf("Creating default this(){} for class %s\n", toChars());
CtorDeclaration *ctor = new CtorDeclaration(loc, 0, NULL, 0);
ctor->fbody = new CompoundStatement(0, new Statements());
members->push(ctor);
ctor->addMember(sc, this, 1);
*sc = scsave; // why? What about sc->nofree?
sc->offset = structsize;
ctor->semantic(sc);
this->ctor = ctor;
defaultCtor = ctor;
}
#if 0
if (baseClass)
{ if (!aggDelete)
aggDelete = baseClass->aggDelete;
if (!aggNew)
aggNew = baseClass->aggNew;
}
#endif
// Allocate instance of each new interface
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (BaseClass *)vtblInterfaces->data[i];
unsigned thissize = PTRSIZE;
alignmember(structalign, thissize, &sc->offset);
assert(b->offset == 0);
b->offset = sc->offset;
// Take care of single inheritance offsets
while (b->baseInterfaces_dim)
{
b = &b->baseInterfaces[0];
b->offset = sc->offset;
}
sc->offset += thissize;
if (alignsize < thissize)
alignsize = thissize;
}
structsize = sc->offset;
sizeok = 1;
Module::dprogress++;
dtor = buildDtor(sc);
sc->pop();
#if 0 // Do not call until toObjfile() because of forward references
// Fill in base class vtbl[]s
for (i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (BaseClass *)vtblInterfaces->data[i];
//b->fillVtbl(this, &b->vtbl, 1);
}
#endif
//printf("-ClassDeclaration::semantic(%s), type = %p\n", toChars(), type);
}