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 visit(TypeStruct *t)
{
//printf("TypeStruct::toArgTypes() %s\n", t->toChars());
if (!t->sym->isPOD() || t->sym->fields.dim == 0)
{
Lmemory:
//printf("\ttoArgTypes() %s => [ ]\n", t->toChars());
result = new TypeTuple(); // pass on the stack
return;
}
Type *t1 = NULL;
Type *t2 = NULL;
const d_uns64 sz = t->size(Loc());
assert(sz < 0xFFFFFFFF);
switch ((unsigned)sz)
{
case 1:
t1 = Type::tint8;
break;
case 2:
t1 = Type::tint16;
break;
case 3:
if (!global.params.is64bit)
goto Lmemory;
/* fall through */
case 4:
t1 = Type::tint32;
break;
case 5:
case 6:
case 7:
if (!global.params.is64bit)
goto Lmemory;
/* fall through */
case 8:
t1 = Type::tint64;
break;
case 16:
t1 = NULL; // could be a TypeVector
break;
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
if (!global.params.is64bit)
goto Lmemory;
t1 = NULL;
break;
default:
goto Lmemory;
}
if (global.params.is64bit && t->sym->fields.dim)
{
t1 = NULL;
for (size_t i = 0; i < t->sym->fields.dim; i++)
{
VarDeclaration *f = t->sym->fields[i];
//printf(" [%d] %s f->type = %s\n", (int)i, f->toChars(), f->type->toChars());
TypeTuple *tup = toArgTypes(f->type);
if (!tup)
goto Lmemory;
size_t dim = tup->arguments->dim;
Type *ft1 = NULL;
Type *ft2 = NULL;
switch (dim)
{
case 2:
ft1 = (*tup->arguments)[0]->type;
ft2 = (*tup->arguments)[1]->type;
break;
case 1:
if (f->offset < 8)
ft1 = (*tup->arguments)[0]->type;
else
ft2 = (*tup->arguments)[0]->type;
break;
default:
goto Lmemory;
}
if (f->offset & 7)
{
// Misaligned fields goto Lmemory
unsigned alignsz = f->type->alignsize();
if (f->offset & (alignsz - 1))
goto Lmemory;
// Fields that overlap the 8byte boundary goto Lmemory
const d_uns64 fieldsz = f->type->size(Loc());
assert(fieldsz != SIZE_INVALID && fieldsz < UINT64_MAX - UINT32_MAX);
if (f->offset < 8 && (f->offset + fieldsz) > 8)
goto Lmemory;
}
// First field in 8byte must be at start of 8byte
assert(t1 || f->offset == 0);
//printf("ft1 = %s\n", ft1 ? ft1->toChars() : "null");
//printf("ft2 = %s\n", ft2 ? ft2->toChars() : "null");
if (ft1)
{
t1 = argtypemerge(t1, ft1, f->offset);
if (!t1)
goto Lmemory;
}
if (ft2)
{
unsigned off2 = f->offset;
if (ft1)
off2 = 8;
if (!t2 && off2 != 8)
goto Lmemory;
assert(t2 || off2 == 8);
t2 = argtypemerge(t2, ft2, off2 - 8);
if (!t2)
goto Lmemory;
}
}
if (t2)
{
if (t1->isfloating() && t2->isfloating())
{
if ((t1->ty == Tfloat32 || t1->ty == Tfloat64) &&
(t2->ty == Tfloat32 || t2->ty == Tfloat64))
;
else
goto Lmemory;
}
else if (t1->isfloating())
goto Lmemory;
else if (t2->isfloating())
goto Lmemory;
else
{
}
}
}
//printf("\ttoArgTypes() %s => [%s,%s]\n", t->toChars(), t1 ? t1->toChars() : "", t2 ? t2->toChars() : "");
if (t1)
{
//if (t1) printf("test1: %s => %s\n", toChars(), t1->toChars());
if (t2)
result = new TypeTuple(t1, t2);
else
result = new TypeTuple(t1);
}
else
goto Lmemory;
}
