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 StructDeclaration::semantic(Scope *sc)
{
Scope *sc2;
//printf("+StructDeclaration::semantic(this=%p, %s '%s', sizeok = %d)\n", this, parent->toChars(), toChars(), sizeok);
//static int count; if (++count == 20) halt();
assert(type);
if (!members) // if opaque declaration
{
return;
}
if (symtab)
{ if (sizeok == SIZEOKdone || !scope)
{ //printf("already completed\n");
scope = NULL;
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;
parent = sc->parent;
type = type->semantic(loc, sc);
handle = type;
protection = sc->protection;
alignment = sc->structalign;
storage_class |= sc->stc;
if (sc->stc & STCdeprecated)
isdeprecated = true;
assert(!isAnonymous());
if (sc->stc & STCabstract)
error("structs, unions cannot be abstract");
userAttributes = sc->userAttributes;
if (sizeok == SIZEOKnone) // if not already done the addMember step
{
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
//printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars());
s->addMember(sc, this, 1);
}
}
sizeok = SIZEOKnone;
sc2 = sc->push(this);
sc2->stc &= STCsafe | STCtrusted | STCsystem;
sc2->parent = this;
if (isUnionDeclaration())
sc2->inunion = 1;
sc2->protection = PROTpublic;
sc2->explicitProtection = 0;
sc2->structalign = STRUCTALIGN_DEFAULT;
sc2->userAttributes = NULL;
/* 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("struct: setScope %s %s\n", s->kind(), s->toChars());
s->setScope(sc2);
}
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
/* If this is the last member, see if we can finish setting the size.
* This could be much better - finish setting the size after the last
* field was processed. The problem is the chicken-and-egg determination
* of when that is. See Bugzilla 7426 for more info.
*/
if (i + 1 == members->dim)
{
if (sizeok == SIZEOKnone && s->isAliasDeclaration())
finalizeSize(sc2);
}
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
s->semantic(sc2);
}
finalizeSize(sc2);
if (sizeok == SIZEOKfwd)
{ // semantic() failed because of 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;
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
scope->module->addDeferredSemantic(this);
Module::dprogress = dprogress_save;
//printf("\tdeferring %s\n", toChars());
return;
}
Module::dprogress++;
//printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars());
// Determine if struct is all zeros or not
zeroInit = 1;
for (size_t i = 0; i < fields.dim; i++)
{
Dsymbol *s = fields[i];
VarDeclaration *vd = s->isVarDeclaration();
if (vd && !vd->isDataseg())
{
if (vd->init)
{
// Should examine init to see if it is really all 0's
zeroInit = 0;
break;
}
else
{
if (!vd->type->isZeroInit(loc))
{
zeroInit = 0;
break;
}
}
}
}
#if DMDV1
/* This doesn't work for DMDV2 because (ref S) and (S) parameter
* lists will overload the same.
*/
/* The TypeInfo_Struct is expecting an opEquals and opCmp with
* a parameter that is a pointer to the struct. But if there
* isn't one, but is an opEquals or opCmp with a value, write
* another that is a shell around the value:
* int opCmp(struct *p) { return opCmp(*p); }
*/
TypeFunction *tfeqptr;
{
Parameters *arguments = new Parameters;
Parameter *arg = new Parameter(STCin, handle, Id::p, NULL);
arguments->push(arg);
tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd);
tfeqptr = (TypeFunction *)tfeqptr->semantic(Loc(), sc);
}
TypeFunction *tfeq;
{
Parameters *arguments = new Parameters;
Parameter *arg = new Parameter(STCin, type, NULL, NULL);
arguments->push(arg);
tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd);
tfeq = (TypeFunction *)tfeq->semantic(Loc(), sc);
}
Identifier *id = Id::eq;
for (int i = 0; i < 2; i++)
{
Dsymbol *s = search_function(this, id);
FuncDeclaration *fdx = s ? s->isFuncDeclaration() : NULL;
if (fdx)
{ FuncDeclaration *fd = fdx->overloadExactMatch(tfeqptr);
if (!fd)
{ fd = fdx->overloadExactMatch(tfeq);
if (fd)
{ // Create the thunk, fdptr
FuncDeclaration *fdptr = new FuncDeclaration(loc, loc, fdx->ident, STCundefined, tfeqptr);
Expression *e = new IdentifierExp(loc, Id::p);
e = new PtrExp(loc, e);
Expressions *args = new Expressions();
args->push(e);
e = new IdentifierExp(loc, id);
e = new CallExp(loc, e, args);
fdptr->fbody = new ReturnStatement(loc, e);
ScopeDsymbol *s = fdx->parent->isScopeDsymbol();
assert(s);
s->members->push(fdptr);
fdptr->addMember(sc, s, 1);
fdptr->semantic(sc2);
}
}
}
id = Id::cmp;
}
#endif
#if DMDV2
dtor = buildDtor(sc2);
postblit = buildPostBlit(sc2);
cpctor = buildCpCtor(sc2);
buildOpAssign(sc2);
buildOpEquals(sc2);
xeq = buildXopEquals(sc2);
xcmp = buildXopCmp(sc2);
/* Even if the struct is merely imported and its semantic3 is not run,
* the TypeInfo object would be speculatively stored in each object
* files. To set correct function pointer, run semantic3 for xeq and xcmp.
*/
//if ((xeq && xeq != xerreq || xcmp && xcmp != xerrcmp) && isImportedSym(this))
// Module::addDeferredSemantic3(this);
/* Defer requesting semantic3 until TypeInfo generation is actually invoked.
* See Type::getTypeInfo().
*/
#endif
inv = buildInv(sc2);
sc2->pop();
/* Look for special member functions.
*/
searchCtor();
aggNew = (NewDeclaration *)search(Loc(), Id::classNew, 0);
aggDelete = (DeleteDeclaration *)search(Loc(), Id::classDelete, 0);
TypeTuple *tup = type->toArgTypes();
size_t dim = tup->arguments->dim;
if (dim >= 1)
{ assert(dim <= 2);
arg1type = (*tup->arguments)[0]->type;
if (dim == 2)
arg2type = (*tup->arguments)[1]->type;
}
if (sc->func)
{
semantic2(sc);
semantic3(sc);
}
if (global.errors != errors)
{ // The type is no good.
type = Type::terror;
this->errors = true;
}
if (deferred && !global.gag)
{
deferred->semantic2(sc);
deferred->semantic3(sc);
}
if (type->ty == Tstruct && ((TypeStruct *)type)->sym != this)
{
error("failed semantic analysis");
this->errors = true;
type = Type::terror;
}
}
void StructDeclaration::semantic(Scope *sc)
{
//printf("+StructDeclaration::semantic(this=%p, %s '%s', sizeok = %d)\n", this, parent->toChars(), toChars(), sizeok);
//static int count; if (++count == 20) halt();
if (semanticRun >= PASSsemanticdone)
return;
unsigned dprogress_save = Module::dprogress;
int errors = global.errors;
Scope *scx = NULL;
if (scope)
{
sc = scope;
scx = scope; // save so we don't make redundant copies
scope = NULL;
}
if (!parent)
{
assert(sc->parent && sc->func);
parent = sc->parent;
}
assert(parent && !isAnonymous());
type = type->semantic(loc, sc);
if (type->ty == Tstruct && ((TypeStruct *)type)->sym != this)
{
TemplateInstance *ti = ((TypeStruct *)type)->sym->isInstantiated();
if (ti && isError(ti))
((TypeStruct *)type)->sym = this;
}
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
if (semanticRun == PASSinit)
{
protection = sc->protection;
alignment = sc->structalign;
storage_class |= sc->stc;
if (storage_class & STCdeprecated)
isdeprecated = true;
if (storage_class & STCabstract)
error("structs, unions cannot be abstract");
userAttribDecl = sc->userAttribDecl;
}
else if (symtab)
{
if (sizeok == SIZEOKdone || !scx)
{
semanticRun = PASSsemanticdone;
return;
}
}
semanticRun = PASSsemantic;
if (!members) // if opaque declaration
{
semanticRun = PASSsemanticdone;
return;
}
if (!symtab)
symtab = new DsymbolTable();
if (sizeok == SIZEOKnone) // if not already done the addMember step
{
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
//printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars());
s->addMember(sc, this, 1);
}
}
sizeok = SIZEOKnone;
Scope *sc2 = sc->push(this);
sc2->stc &= STCsafe | STCtrusted | STCsystem;
sc2->parent = this;
if (isUnionDeclaration())
sc2->inunion = 1;
sc2->protection = Prot(PROTpublic);
sc2->explicitProtection = 0;
sc2->structalign = STRUCTALIGN_DEFAULT;
sc2->userAttribDecl = NULL;
/* 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("struct: setScope %s %s\n", s->kind(), s->toChars());
s->setScope(sc2);
}
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->importAll(sc2);
}
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
/* If this is the last member, see if we can finish setting the size.
* This could be much better - finish setting the size after the last
* field was processed. The problem is the chicken-and-egg determination
* of when that is. See Bugzilla 7426 for more info.
*/
if (i + 1 == members->dim)
{
if (sizeok == SIZEOKnone && s->isAliasDeclaration())
finalizeSize(sc2);
}
s->semantic(sc2);
}
finalizeSize(sc2);
if (sizeok == SIZEOKfwd)
{
// semantic() failed because of forward references.
// Unwind what we did, and defer it for later
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration *vd = fields[i];
vd->offset = 0;
}
fields.setDim(0);
structsize = 0;
alignsize = 0;
scope = scx ? scx : sc->copy();
scope->setNoFree();
scope->module->addDeferredSemantic(this);
Module::dprogress = dprogress_save;
//printf("\tdeferring %s\n", toChars());
return;
}
Module::dprogress++;
semanticRun = PASSsemanticdone;
//printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars());
// Determine if struct is all zeros or not
zeroInit = 1;
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration *vd = fields[i];
if (!vd->isDataseg())
{
if (vd->init)
{
// Should examine init to see if it is really all 0's
zeroInit = 0;
break;
}
else
{
if (!vd->type->isZeroInit(loc))
{
zeroInit = 0;
break;
}
}
}
}
dtor = buildDtor(this, sc2);
postblit = buildPostBlit(this, sc2);
cpctor = buildCpCtor(this, sc2);
buildOpAssign(this, sc2);
buildOpEquals(this, sc2);
xeq = buildXopEquals(this, sc2);
xcmp = buildXopCmp(this, sc2);
xhash = buildXtoHash(this, sc2);
/* Even if the struct is merely imported and its semantic3 is not run,
* the TypeInfo object would be speculatively stored in each object
* files. To set correct function pointer, run semantic3 for xeq and xcmp.
*/
//if ((xeq && xeq != xerreq || xcmp && xcmp != xerrcmp) && isImportedSym(this))
// Module::addDeferredSemantic3(this);
/* Defer requesting semantic3 until TypeInfo generation is actually invoked.
* See semanticTypeInfo().
*/
inv = buildInv(this, sc2);
sc2->pop();
/* Look for special member functions.
*/
ctor = searchCtor();
aggNew = (NewDeclaration *)search(Loc(), Id::classNew);
aggDelete = (DeleteDeclaration *)search(Loc(), Id::classDelete);
if (ctor)
{
Dsymbol *scall = search(Loc(), Id::call);
if (scall)
{
unsigned xerrors = global.startGagging();
sc = sc->push();
sc->speculative = true;
FuncDeclaration *fcall = resolveFuncCall(loc, sc, scall, NULL, NULL, NULL, 1);
sc = sc->pop();
global.endGagging(xerrors);
if (fcall && fcall->isStatic())
{
error(fcall->loc, "static opCall is hidden by constructors and can never be called");
errorSupplemental(fcall->loc, "Please use a factory method instead, or replace all constructors with static opCall.");
}
}
}
TypeTuple *tup = toArgTypes(type);
size_t dim = tup->arguments->dim;
if (dim >= 1)
{
assert(dim <= 2);
arg1type = (*tup->arguments)[0]->type;
if (dim == 2)
arg2type = (*tup->arguments)[1]->type;
}
if (sc->func)
semantic2(sc);
if (global.errors != errors)
{
// The type is no good.
type = Type::terror;
this->errors = true;
if (deferred)
deferred->errors = true;
}
if (deferred && !global.gag)
{
deferred->semantic2(sc);
deferred->semantic3(sc);
}
#if 0
if (type->ty == Tstruct && ((TypeStruct *)type)->sym != this)
{
printf("this = %p %s\n", this, this->toChars());
printf("type = %d sym = %p\n", type->ty, ((TypeStruct *)type)->sym);
}
#endif
assert(type->ty != Tstruct || ((TypeStruct *)type)->sym == this);
}
void StructDeclaration::semantic(Scope *sc)
{
Scope *sc2;
//printf("+StructDeclaration::semantic(this=%p, %s '%s', sizeok = %d)\n", this, parent->toChars(), toChars(), sizeok);
//static int count; if (++count == 20) halt();
assert(type);
if (!members) // if opaque declaration
{
return;
}
if (symtab)
{ if (sizeok == SIZEOKdone || !scope)
{ //printf("already completed\n");
scope = NULL;
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;
parent = sc->parent;
type = type->semantic(loc, sc);
handle = type;
protection = sc->protection;
alignment = sc->structalign;
storage_class |= sc->stc;
if (sc->stc & STCdeprecated)
isdeprecated = true;
assert(!isAnonymous());
if (sc->stc & STCabstract)
error("structs, unions cannot be abstract");
userAttributes = sc->userAttributes;
if (sizeok == SIZEOKnone) // if not already done the addMember step
{
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
//printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars());
s->addMember(sc, this, 1);
}
}
sizeok = SIZEOKnone;
sc2 = sc->push(this);
sc2->stc &= STCsafe | STCtrusted | STCsystem;
sc2->parent = this;
if (isUnionDeclaration())
sc2->inunion = 1;
sc2->protection = PROTpublic;
sc2->explicitProtection = 0;
sc2->structalign = STRUCTALIGN_DEFAULT;
sc2->userAttributes = NULL;
/* 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("struct: setScope %s %s\n", s->kind(), s->toChars());
s->setScope(sc2);
}
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
/* If this is the last member, see if we can finish setting the size.
* This could be much better - finish setting the size after the last
* field was processed. The problem is the chicken-and-egg determination
* of when that is. See Bugzilla 7426 for more info.
*/
if (i + 1 == members->dim)
{
if (sizeok == SIZEOKnone && s->isAliasDeclaration())
finalizeSize(sc2);
}
// Ungag errors when not speculative
Ungag ungag = ungagSpeculative();
s->semantic(sc2);
}
finalizeSize(sc2);
if (sizeok == SIZEOKfwd)
{ // semantic() failed because of 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;
scope = scx ? scx : new Scope(*sc);
scope->setNoFree();
scope->module->addDeferredSemantic(this);
Module::dprogress = dprogress_save;
//printf("\tdeferring %s\n", toChars());
return;
}
Module::dprogress++;
//printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars());
// Determine if struct is all zeros or not
zeroInit = calcZeroInit();
dtor = buildDtor(sc2);
postblit = buildPostBlit(sc2);
cpctor = buildCpCtor(sc2);
buildOpAssign(sc2);
buildOpEquals(sc2);
xeq = buildXopEquals(sc2);
xcmp = buildXopCmp(sc2);
/* Even if the struct is merely imported and its semantic3 is not run,
* the TypeInfo object would be speculatively stored in each object
* files. To set correct function pointer, run semantic3 for xeq and xcmp.
*/
//if ((xeq && xeq != xerreq || xcmp && xcmp != xerrcmp) && isImportedSym(this))
// Module::addDeferredSemantic3(this);
/* Defer requesting semantic3 until TypeInfo generation is actually invoked.
* See Type::getTypeInfo().
*/
inv = buildInv(sc2);
sc2->pop();
/* Look for special member functions.
*/
searchCtor();
aggNew = (NewDeclaration *)search(Loc(), Id::classNew, 0);
aggDelete = (DeleteDeclaration *)search(Loc(), Id::classDelete, 0);
TypeTuple *tup = type->toArgTypes();
size_t dim = tup->arguments->dim;
if (dim >= 1)
{ assert(dim <= 2);
arg1type = (*tup->arguments)[0]->type;
if (dim == 2)
arg2type = (*tup->arguments)[1]->type;
}
if (sc->func)
{
semantic2(sc);
semantic3(sc);
}
#if 1
{
// build a literal now to initialize vtinfo of element types
StructLiteralExp *sle = new StructLiteralExp(loc, this, NULL);
Expression *e = sle->fill(true);
}
#endif
if (global.errors != errors)
{ // The type is no good.
type = Type::terror;
this->errors = true;
}
if (deferred && !global.gag)
{
deferred->semantic2(sc);
deferred->semantic3(sc);
}
if (type->ty == Tstruct && ((TypeStruct *)type)->sym != this)
{
error("failed semantic analysis");
this->errors = true;
type = Type::terror;
}
}
void StructDeclaration::finalizeSize(Scope *sc)
{
//printf("StructDeclaration::finalizeSize() %s\n", toChars());
if (sizeok != SIZEOKnone)
return;
// Set the offsets of the fields and determine the size of the struct
unsigned offset = 0;
bool isunion = isUnionDeclaration() != NULL;
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->setFieldOffset(this, &offset, isunion);
}
if (sizeok == SIZEOKfwd)
return;
// 0 sized struct's are set to 1 byte
if (structsize == 0)
{
structsize = 1;
alignsize = 1;
}
// Round struct size up to next alignsize boundary.
// This will ensure that arrays of structs will get their internals
// aligned properly.
if (alignment == STRUCTALIGN_DEFAULT)
structsize = (structsize + alignsize - 1) & ~(alignsize - 1);
else
structsize = (structsize + alignment - 1) & ~(alignment - 1);
sizeok = SIZEOKdone;
// Calculate fields[i]->overlapped
fill(loc, NULL, true);
// Determine if struct is all zeros or not
zeroInit = 1;
for (size_t i = 0; i < fields.dim; i++)
{
VarDeclaration *vd = fields[i];
if (!vd->isDataseg())
{
if (vd->init)
{
// Should examine init to see if it is really all 0's
zeroInit = 0;
break;
}
else
{
if (!vd->type->isZeroInit(loc))
{
zeroInit = 0;
break;
}
}
}
}
// Look for the constructor, for the struct literal/constructor call expression
ctor = searchCtor();
if (ctor)
{
// Finish all constructors semantics to determine this->noDefaultCtor.
struct SearchCtor
{
static int fp(Dsymbol *s, void *ctxt)
{
CtorDeclaration *f = s->isCtorDeclaration();
if (f && f->semanticRun == PASSinit)
f->semantic(NULL);
return 0;
}
};
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->apply(&SearchCtor::fp, NULL);
}
}
}
