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struct.c
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struct.c
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/* Compiler implementation of the D programming language
* Copyright (c) 1999-2014 by Digital Mars
* All Rights Reserved
* written by Walter Bright
* http://www.digitalmars.com
* Distributed under the Boost Software License, Version 1.0.
* http://www.boost.org/LICENSE_1_0.txt
* https://github.com/D-Programming-Language/dmd/blob/master/src/struct.c
*/
#include <stdio.h>
#include <assert.h>
#include "root.h"
#include "aggregate.h"
#include "scope.h"
#include "mtype.h"
#include "init.h"
#include "declaration.h"
#include "module.h"
#include "id.h"
#include "statement.h"
#include "template.h"
#include "tokens.h"
TypeTuple *toArgTypes(Type *t);
FuncDeclaration *StructDeclaration::xerreq; // object.xopEquals
FuncDeclaration *StructDeclaration::xerrcmp; // object.xopCmp
/***************************************
* Search toString member function for TypeInfo_Struct.
* string toString();
*/
FuncDeclaration *search_toString(StructDeclaration *sd)
{
Dsymbol *s = search_function(sd, Id::tostring);
FuncDeclaration *fd = s ? s->isFuncDeclaration() : NULL;
if (fd)
{
static TypeFunction *tftostring;
if (!tftostring)
{
tftostring = new TypeFunction(NULL, Type::tstring, 0, LINKd);
tftostring = (TypeFunction *)tftostring->merge();
}
fd = fd->overloadExactMatch(tftostring);
}
return fd;
}
/***************************************
* Request additonal semantic analysis for TypeInfo generation.
*/
void semanticTypeInfo(Scope *sc, Type *t)
{
class FullTypeInfoVisitor : public Visitor
{
public:
Scope *sc;
void visit(Type *t)
{
Type *tb = t->toBasetype();
if (tb != t)
tb->accept(this);
}
void visit(TypeNext *t)
{
if (t->next)
t->next->accept(this);
}
void visit(TypeBasic *t) { }
void visit(TypeVector *t)
{
t->basetype->accept(this);
}
void visit(TypeAArray *t)
{
t->index->accept(this);
visit((TypeNext *)t);
}
void visit(TypeFunction *t)
{
visit((TypeNext *)t);
// Currently TypeInfo_Function doesn't store parameter types.
}
void visit(TypeStruct *t)
{
StructDeclaration *sd = t->sym;
if (!sd->members)
return; // opaque struct
if (sd->semanticRun >= PASSsemantic3)
return; // semantic3 will be done
if (!sd->xeq && !sd->xcmp && !sd->postblit &&
!sd->dtor && !sd->xhash && !search_toString(sd))
return; // none of TypeInfo-specific members
// If the struct is in a non-root module, run semantic3 to get
// correct symbols for the member function.
// Note that, all instantiated symbols will run semantic3.
if (sd->inNonRoot())
{
//printf("deferred sem3 for TypeInfo - sd = %s, inNonRoot = %d\n", sd->toChars(), sd->inNonRoot());
Module::addDeferredSemantic3(sd);
}
}
void visit(TypeClass *t) { }
void visit(TypeTuple *t)
{
if (t->arguments)
{
for (size_t i = 0; i < t->arguments->dim; i++)
{
Type *tprm = (*t->arguments)[i]->type;
if (tprm)
tprm->accept(this);
}
}
}
};
FullTypeInfoVisitor v;
v.sc = sc;
t->accept(&v);
}
/********************************* AggregateDeclaration ****************************/
AggregateDeclaration::AggregateDeclaration(Loc loc, Identifier *id)
: ScopeDsymbol(id)
{
this->loc = loc;
storage_class = 0;
protection = Prot(PROTpublic);
type = NULL;
structsize = 0; // size of struct
alignsize = 0; // size of struct for alignment purposes
sizeok = SIZEOKnone; // size not determined yet
deferred = NULL;
isdeprecated = false;
mutedeprecation = false;
inv = NULL;
aggNew = NULL;
aggDelete = NULL;
stag = NULL;
sinit = NULL;
enclosing = NULL;
vthis = NULL;
ctor = NULL;
defaultCtor = NULL;
aliasthis = NULL;
noDefaultCtor = false;
dtor = NULL;
getRTInfo = NULL;
}
Prot AggregateDeclaration::prot()
{
return protection;
}
void AggregateDeclaration::setScope(Scope *sc)
{
if (sizeok == SIZEOKdone)
return;
ScopeDsymbol::setScope(sc);
}
void AggregateDeclaration::semantic2(Scope *sc)
{
//printf("AggregateDeclaration::semantic2(%s) type = %s, errors = %d\n", toChars(), type->toChars(), errors);
if (!members)
return;
if (scope && sizeok == SIZEOKfwd) // Bugzilla 12531
semantic(NULL);
if (scope)
{
error("has forward references");
return;
}
Scope *sc2 = sc->push(this);
sc2->stc &= STCsafe | STCtrusted | STCsystem;
sc2->parent = this;
//if (isUnionDeclaration()) // TODO
// sc2->inunion = 1;
sc2->protection = Prot(PROTpublic);
sc2->explicitProtection = 0;
sc2->structalign = STRUCTALIGN_DEFAULT;
sc2->userAttribDecl = NULL;
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
//printf("\t[%d] %s\n", i, s->toChars());
s->semantic2(sc2);
}
sc2->pop();
}
void AggregateDeclaration::semantic3(Scope *sc)
{
//printf("AggregateDeclaration::semantic3(%s) type = %s, errors = %d\n", toChars(), type->toChars(), errors);
if (!members)
return;
StructDeclaration *sd = isStructDeclaration();
if (!sc) // from runDeferredSemantic3 for TypeInfo generation
{
assert(sd);
sd->semanticTypeInfoMembers();
return;
}
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;
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
s->semantic3(sc2);
}
sc2->pop();
// don't do it for unused deprecated types
// or error types
if (!getRTInfo && Type::rtinfo &&
(!isDeprecated() || global.params.useDeprecated) &&
(type && type->ty != Terror))
{
// we do not want to report deprecated uses of this type during RTInfo
// generation, so we disable reporting deprecation temporarily
// WARNING: Muting messages during analysis of RTInfo might silently instantiate
// templates that use (other) deprecated types. If these template instances
// are used in other parts of the program later, they will be reused without
// ever producing the deprecation message. The implementation here restricts
// muting to the types that RTInfo is currently generated for.
bool wasmuted = mutedeprecation;
mutedeprecation = true;
// Evaluate: RTinfo!type
Objects *tiargs = new Objects();
tiargs->push(type);
TemplateInstance *ti = new TemplateInstance(loc, Type::rtinfo, tiargs);
ti->semantic(sc);
ti->semantic2(sc);
ti->semantic3(sc);
Dsymbol *s = ti->toAlias();
Expression *e = new DsymbolExp(Loc(), s, 0);
Scope *sc3 = ti->tempdecl->scope->startCTFE();
sc3->tinst = sc->tinst;
e = e->semantic(sc3);
sc3->endCTFE();
e = e->ctfeInterpret();
getRTInfo = e;
mutedeprecation = wasmuted;
}
if (sd)
sd->semanticTypeInfoMembers();
}
void StructDeclaration::semanticTypeInfoMembers()
{
if (xeq &&
xeq->scope &&
xeq->semanticRun < PASSsemantic3done)
{
unsigned errors = global.startGagging();
xeq->semantic3(xeq->scope);
if (global.endGagging(errors))
xeq = xerreq;
}
if (xcmp &&
xcmp->scope &&
xcmp->semanticRun < PASSsemantic3done)
{
unsigned errors = global.startGagging();
xcmp->semantic3(xcmp->scope);
if (global.endGagging(errors))
xcmp = xerrcmp;
}
FuncDeclaration *ftostr = search_toString(this);
if (ftostr &&
ftostr->scope &&
ftostr->semanticRun < PASSsemantic3done)
{
ftostr->semantic3(ftostr->scope);
}
if (xhash &&
xhash->scope &&
xhash->semanticRun < PASSsemantic3done)
{
xhash->semantic3(xhash->scope);
}
if (postblit &&
postblit->scope &&
postblit->semanticRun < PASSsemantic3done)
{
postblit->semantic3(postblit->scope);
}
if (dtor &&
dtor->scope &&
dtor->semanticRun < PASSsemantic3done)
{
dtor->semantic3(dtor->scope);
}
}
unsigned AggregateDeclaration::size(Loc loc)
{
//printf("AggregateDeclaration::size() %s, scope = %p\n", toChars(), scope);
if (loc.linnum == 0)
loc = this->loc;
if (sizeok != SIZEOKdone && scope)
{
semantic(NULL);
// Determine the instance size of base class first.
if (ClassDeclaration *cd = isClassDeclaration())
cd->baseClass->size(loc);
}
if (sizeok != SIZEOKdone && members)
{
/* See if enough is done to determine the size,
* meaning all the fields are done.
*/
struct SV
{
/* Returns:
* 0 this member doesn't need further processing to determine struct size
* 1 this member does
*/
static int func(Dsymbol *s, void *param)
{
VarDeclaration *v = s->isVarDeclaration();
if (v)
{
/* Bugzilla 12799: enum a = ...; is a VarDeclaration and
* STCmanifest is already set in parssing stage. So we can
* check this before the semantic() call.
*/
if (v->storage_class & STCmanifest)
return 0;
if (v->scope)
v->semantic(NULL);
if (v->storage_class & (STCstatic | STCextern | STCtls | STCgshared | STCmanifest | STCctfe | STCtemplateparameter))
return 0;
if (v->isField() && v->sem >= SemanticDone)
return 0;
return 1;
}
return 0;
}
};
SV sv;
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *s = (*members)[i];
if (s->apply(&SV::func, &sv))
goto L1;
}
finalizeSize(NULL);
L1: ;
}
if (!members)
{
error(loc, "unknown size");
}
else if (sizeok != SIZEOKdone)
{
error(loc, "no size yet for forward reference");
//*(char*)0=0;
}
return structsize;
}
Type *AggregateDeclaration::getType()
{
return type;
}
bool AggregateDeclaration::isDeprecated()
{
return isdeprecated;
}
bool AggregateDeclaration::muteDeprecationMessage()
{
return mutedeprecation;
}
bool AggregateDeclaration::isExport()
{
return protection.kind == PROTexport;
}
/****************************
* Do byte or word alignment as necessary.
* Align sizes of 0, as we may not know array sizes yet.
*
* alignment: struct alignment that is in effect
* size: alignment requirement of field
*/
void AggregateDeclaration::alignmember(
structalign_t alignment,
unsigned size,
unsigned *poffset)
{
//printf("alignment = %d, size = %d, offset = %d\n",alignment,size,offset);
switch (alignment)
{
case (structalign_t) 1:
// No alignment
break;
case (structalign_t) STRUCTALIGN_DEFAULT:
// Alignment in Target::fieldalignsize must match what the
// corresponding C compiler's default alignment behavior is.
assert(size > 0 && !(size & (size - 1)));
*poffset = (*poffset + size - 1) & ~(size - 1);
break;
default:
// Align on alignment boundary, which must be a positive power of 2
assert(alignment > 0 && !(alignment & (alignment - 1)));
*poffset = (*poffset + alignment - 1) & ~(alignment - 1);
break;
}
}
/****************************************
* Place a member (mem) into an aggregate (agg), which can be a struct, union or class
* Returns:
* offset to place field at
*
* nextoffset: next location in aggregate
* memsize: size of member
* memalignsize: size of member for alignment purposes
* alignment: alignment in effect for this member
* paggsize: size of aggregate (updated)
* paggalignsize: size of aggregate for alignment purposes (updated)
* isunion: the aggregate is a union
*/
unsigned AggregateDeclaration::placeField(
unsigned *nextoffset,
unsigned memsize,
unsigned memalignsize,
structalign_t alignment,
unsigned *paggsize,
unsigned *paggalignsize,
bool isunion
)
{
unsigned ofs = *nextoffset;
alignmember(alignment, memalignsize, &ofs);
unsigned memoffset = ofs;
ofs += memsize;
if (ofs > *paggsize)
*paggsize = ofs;
if (!isunion)
*nextoffset = ofs;
if (alignment == STRUCTALIGN_DEFAULT)
{
if (global.params.is64bit && memalignsize == 16)
;
else if (8 < memalignsize)
memalignsize = 8;
}
else
{
if (memalignsize < alignment)
memalignsize = alignment;
}
if (*paggalignsize < memalignsize)
*paggalignsize = memalignsize;
return memoffset;
}
/****************************************
* Returns true if there's an extra member which is the 'this'
* pointer to the enclosing context (enclosing aggregate or function)
*/
bool AggregateDeclaration::isNested()
{
return enclosing != NULL;
}
void AggregateDeclaration::makeNested()
{
if (enclosing) // if already nested
return;
if (sizeok == SIZEOKdone)
return;
if (isUnionDeclaration() || isInterfaceDeclaration())
return;
if (storage_class & STCstatic)
return;
// If nested struct, add in hidden 'this' pointer to outer scope
Dsymbol *s = toParent2();
if (!s)
return;
AggregateDeclaration *ad = s->isAggregateDeclaration();
FuncDeclaration *fd = s->isFuncDeclaration();
Type *t = NULL;
if (fd)
{
enclosing = fd;
AggregateDeclaration *agg = fd->isMember2();
t = agg ? agg->handleType() : Type::tvoidptr;
}
else if (ad)
{
if (isClassDeclaration() && ad->isClassDeclaration())
{
enclosing = ad;
}
else if (isStructDeclaration())
{
if (TemplateInstance *ti = ad->parent->isTemplateInstance())
{
enclosing = ti->enclosing;
}
}
t = ad->handleType();
}
if (enclosing)
{
//printf("makeNested %s, enclosing = %s\n", toChars(), enclosing->toChars());
assert(t);
if (t->ty == Tstruct)
t = Type::tvoidptr; // t should not be a ref type
assert(!vthis);
vthis = new ThisDeclaration(loc, t);
//vthis->storage_class |= STCref;
members->push(vthis);
}
}
/****************************************
* If field[indx] is not part of a union, return indx.
* Otherwise, return the lowest field index of the union.
*/
int AggregateDeclaration::firstFieldInUnion(int indx)
{
if (isUnionDeclaration())
return 0;
VarDeclaration *vd = fields[indx];
int firstNonZero = indx; // first index in the union with non-zero size
for (; ;)
{
if (indx == 0)
return firstNonZero;
VarDeclaration *v = fields[indx - 1];
if (v->offset != vd->offset)
return firstNonZero;
--indx;
/* If it is a zero-length field, it's ambiguous: we don't know if it is
* in the union unless we find an earlier non-zero sized field with the
* same offset.
*/
if (v->size(loc) != 0)
firstNonZero = indx;
}
}
/****************************************
* Count the number of fields starting at firstIndex which are part of the
* same union as field[firstIndex]. If not a union, return 1.
*/
int AggregateDeclaration::numFieldsInUnion(int firstIndex)
{
VarDeclaration *vd = fields[firstIndex];
/* If it is a zero-length field, AND we can't find an earlier non-zero
* sized field with the same offset, we assume it's not part of a union.
*/
if (vd->size(loc) == 0 && !isUnionDeclaration() &&
firstFieldInUnion(firstIndex) == firstIndex)
return 1;
int count = 1;
for (size_t i = firstIndex+1; i < fields.dim; ++i)
{
VarDeclaration *v = fields[i];
// If offsets are different, they are not in the same union
if (v->offset != vd->offset)
break;
++count;
}
return count;
}
/*******************************************
* Look for constructor declaration.
*/
Dsymbol *AggregateDeclaration::searchCtor()
{
Dsymbol *s = search(Loc(), Id::ctor);
if (s)
{
if (!(s->isCtorDeclaration() ||
s->isTemplateDeclaration() ||
s->isOverloadSet()))
{
s->error("is not a constructor; identifiers starting with __ are reserved for the implementation");
errors = true;
s = NULL;
}
}
return s;
}
/********************************* StructDeclaration ****************************/
StructDeclaration::StructDeclaration(Loc loc, Identifier *id)
: AggregateDeclaration(loc, id)
{
zeroInit = 0; // assume false until we do semantic processing
hasIdentityAssign = false;
hasIdentityEquals = false;
postblit = NULL;
xeq = NULL;
xcmp = NULL;
xhash = NULL;
alignment = 0;
ispod = ISPODfwd;
arg1type = NULL;
arg2type = NULL;
// For forward references
type = new TypeStruct(this);
if (id == Id::ModuleInfo && !Module::moduleinfo)
Module::moduleinfo = this;
}
Dsymbol *StructDeclaration::syntaxCopy(Dsymbol *s)
{
StructDeclaration *sd =
s ? (StructDeclaration *)s
: new StructDeclaration(loc, ident);
return ScopeDsymbol::syntaxCopy(sd);
}
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);
}
}
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];
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 *v = fields[i];
v->offset = 0;
}
fields.setDim(0);
structsize = 0;
alignsize = 0;
sc2->pop();
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());
/* Look for special member functions.
*/
aggNew = (NewDeclaration *)search(Loc(), Id::classNew);
aggDelete = (DeleteDeclaration *)search(Loc(), Id::classDelete);
// this->ctor is already set in finalizeSize()
dtor = buildDtor(this, sc2);
postblit = buildPostBlit(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();
if (ctor)
{
Dsymbol *scall = search(Loc(), Id::call);
if (scall)
{
unsigned xerrors = global.startGagging();
sc = sc->push();
sc->tinst = NULL;
sc->minst = NULL;
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);
}
Dsymbol *StructDeclaration::search(Loc loc, Identifier *ident, int flags)
{
//printf("%s.StructDeclaration::search('%s')\n", toChars(), ident->toChars());
if (scope && !symtab)
semantic(scope);
if (!members || !symtab) // opaque or semantic() is not yet called
{
error("is forward referenced when looking for '%s'", ident->toChars());
return NULL;
}
return ScopeDsymbol::search(loc, ident, flags);
}
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);