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func.c
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2011 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.
#include <stdio.h>
#include <assert.h>
#include "mars.h"
#include "init.h"
#include "declaration.h"
#include "attrib.h"
#include "expression.h"
#include "scope.h"
#include "mtype.h"
#include "aggregate.h"
#include "identifier.h"
#include "id.h"
#include "module.h"
#include "statement.h"
#include "template.h"
#include "hdrgen.h"
#ifdef IN_GCC
#include "d-dmd-gcc.h"
#endif
/********************************* FuncDeclaration ****************************/
FuncDeclaration::FuncDeclaration(Loc loc, Loc endloc, Identifier *id, StorageClass storage_class, Type *type)
: Declaration(id)
{
//printf("FuncDeclaration(id = '%s', type = %p)\n", id->toChars(), type);
//printf("storage_class = x%x\n", storage_class);
this->storage_class = storage_class;
this->type = type;
this->loc = loc;
this->endloc = endloc;
fthrows = NULL;
frequire = NULL;
fdrequire = NULL;
fdensure = NULL;
outId = NULL;
vresult = NULL;
returnLabel = NULL;
fensure = NULL;
fbody = NULL;
localsymtab = NULL;
vthis = NULL;
v_arguments = NULL;
#if IN_GCC
v_argptr = NULL;
#endif
v_argsave = NULL;
parameters = NULL;
labtab = NULL;
overnext = NULL;
vtblIndex = -1;
hasReturnExp = 0;
naked = 0;
inlineStatus = ILSuninitialized;
inlineNest = 0;
cantInterpret = 0;
isArrayOp = 0;
semanticRun = PASSinit;
#if DMDV1
nestedFrameRef = 0;
#endif
fes = NULL;
introducing = 0;
tintro = NULL;
/* The type given for "infer the return type" is a TypeFunction with
* NULL for the return type.
*/
inferRetType = (type && type->nextOf() == NULL);
hasReturnExp = 0;
nrvo_can = 1;
nrvo_var = NULL;
shidden = NULL;
#if DMDV2
builtin = BUILTINunknown;
tookAddressOf = 0;
flags = 0;
#endif
}
Dsymbol *FuncDeclaration::syntaxCopy(Dsymbol *s)
{
FuncDeclaration *f;
//printf("FuncDeclaration::syntaxCopy('%s')\n", toChars());
if (s)
f = (FuncDeclaration *)s;
else
f = new FuncDeclaration(loc, endloc, ident, storage_class, type->syntaxCopy());
f->outId = outId;
f->frequire = frequire ? frequire->syntaxCopy() : NULL;
f->fensure = fensure ? fensure->syntaxCopy() : NULL;
f->fbody = fbody ? fbody->syntaxCopy() : NULL;
assert(!fthrows); // deprecated
return f;
}
// Do the semantic analysis on the external interface to the function.
void FuncDeclaration::semantic(Scope *sc)
{ TypeFunction *f;
AggregateDeclaration *ad;
StructDeclaration *sd;
ClassDeclaration *cd;
InterfaceDeclaration *id;
Dsymbol *pd;
#if 0
printf("FuncDeclaration::semantic(sc = %p, this = %p, '%s', linkage = %d)\n", sc, this, toPrettyChars(), sc->linkage);
if (isFuncLiteralDeclaration())
printf("\tFuncLiteralDeclaration()\n");
printf("sc->parent = %s, parent = %s\n", sc->parent->toChars(), parent ? parent->toChars() : "");
printf("type: %p, %s\n", type, type->toChars());
#endif
if (semanticRun != PASSinit && isFuncLiteralDeclaration())
{
/* Member functions that have return types that are
* forward references can have semantic() run more than
* once on them.
* See test\interface2.d, test20
*/
return;
}
parent = sc->parent;
Dsymbol *parent = toParent();
if (semanticRun >= PASSsemanticdone)
{
if (!parent->isClassDeclaration())
{
return;
}
// need to re-run semantic() in order to set the class's vtbl[]
}
else
{
assert(semanticRun <= PASSsemantic);
semanticRun = PASSsemantic;
}
unsigned dprogress_save = Module::dprogress;
foverrides.setDim(0); // reset in case semantic() is being retried for this function
storage_class |= sc->stc & ~STCref;
ad = isThis();
if (ad)
storage_class |= ad->storage_class & (STC_TYPECTOR | STCsynchronized);
//printf("function storage_class = x%llx, sc->stc = x%llx, %x\n", storage_class, sc->stc, Declaration::isFinal());
if (!originalType)
originalType = type;
if (!type->deco)
{
sc = sc->push();
sc->stc |= storage_class & (STCref | STCnothrow | STCpure | STCdisable
| STCsafe | STCtrusted | STCsystem | STCproperty); // forward to function type
if (isCtorDeclaration())
sc->flags |= SCOPEctor;
type = type->semantic(loc, sc);
sc = sc->pop();
/* Apply const, immutable and shared storage class
* to the function type
*/
StorageClass stc = storage_class;
if (type->isImmutable())
stc |= STCimmutable;
if (type->isConst())
stc |= STCconst;
if (type->isShared() || storage_class & STCsynchronized)
stc |= STCshared;
if (type->isWild())
stc |= STCwild;
switch (stc & STC_TYPECTOR)
{
case STCimmutable:
case STCimmutable | STCconst:
case STCimmutable | STCconst | STCshared:
case STCimmutable | STCshared:
case STCimmutable | STCwild:
case STCimmutable | STCconst | STCwild:
case STCimmutable | STCconst | STCshared | STCwild:
case STCimmutable | STCshared | STCwild:
// Don't use toInvariant(), as that will do a merge()
type = type->makeInvariant();
goto Lmerge;
case STCconst:
case STCconst | STCwild:
type = type->makeConst();
goto Lmerge;
case STCshared | STCconst:
case STCshared | STCconst | STCwild:
type = type->makeSharedConst();
goto Lmerge;
case STCshared:
type = type->makeShared();
goto Lmerge;
case STCwild:
type = type->makeWild();
goto Lmerge;
case STCshared | STCwild:
type = type->makeSharedWild();
goto Lmerge;
Lmerge:
if (!(type->ty == Tfunction && !type->nextOf()))
/* Can't do merge if return type is not known yet
*/
type->deco = type->merge()->deco;
break;
case 0:
break;
default:
assert(0);
}
}
storage_class &= ~STCref;
if (type->ty != Tfunction)
{
error("%s must be a function instead of %s", toChars(), type->toChars());
return;
}
f = (TypeFunction *)(type);
size_t nparams = Parameter::dim(f->parameters);
linkage = sc->linkage;
protection = sc->protection;
/* Purity and safety can be inferred for some functions by examining
* the function body.
*/
if (fbody &&
(isFuncLiteralDeclaration() || parent->isTemplateInstance()))
{
if (f->purity == PUREimpure && // purity not specified
!f->hasLazyParameters()
)
{
flags |= FUNCFLAGpurityInprocess;
}
if (f->trust == TRUSTdefault)
flags |= FUNCFLAGsafetyInprocess;
if (!f->isnothrow)
flags |= FUNCFLAGnothrowInprocess;
}
if (storage_class & STCscope)
error("functions cannot be scope");
if (isAbstract() && !isVirtual())
error("non-virtual functions cannot be abstract");
if ((f->isConst() || f->isImmutable()) && !isThis())
error("without 'this' cannot be const/immutable");
if (isAbstract() && isFinal())
error("cannot be both final and abstract");
#if 0
if (isAbstract() && fbody)
error("abstract functions cannot have bodies");
#endif
#if 0
if (isStaticConstructor() || isStaticDestructor())
{
if (!isStatic() || type->nextOf()->ty != Tvoid)
error("static constructors / destructors must be static void");
if (f->arguments && f->arguments->dim)
error("static constructors / destructors must have empty parameter list");
// BUG: check for invalid storage classes
}
#endif
#ifdef IN_GCC
{
AggregateDeclaration *ad = parent->isAggregateDeclaration();
if (ad)
ad->methods.push(this);
}
#endif
sd = parent->isStructDeclaration();
if (sd)
{
if (isCtorDeclaration())
{
goto Ldone;
}
#if 0
// Verify no constructors, destructors, etc.
if (isCtorDeclaration()
//||isDtorDeclaration()
//|| isInvariantDeclaration()
//|| isUnitTestDeclaration()
)
{
error("special member functions not allowed for %ss", sd->kind());
}
if (!sd->inv)
sd->inv = isInvariantDeclaration();
if (!sd->aggNew)
sd->aggNew = isNewDeclaration();
if (isDelete())
{
if (sd->aggDelete)
error("multiple delete's for struct %s", sd->toChars());
sd->aggDelete = (DeleteDeclaration *)(this);
}
#endif
}
id = parent->isInterfaceDeclaration();
if (id)
{
storage_class |= STCabstract;
if (isCtorDeclaration() ||
#if DMDV2
isPostBlitDeclaration() ||
#endif
isDtorDeclaration() ||
isInvariantDeclaration() ||
isUnitTestDeclaration() || isNewDeclaration() || isDelete())
error("constructors, destructors, postblits, invariants, unittests, new and delete functions are not allowed in interface %s", id->toChars());
if (fbody && isVirtual())
error("function body is not abstract in interface %s", id->toChars());
}
/* Contracts can only appear without a body when they are virtual interface functions
*/
if (!fbody && (fensure || frequire) && !(id && isVirtual()))
error("in and out contracts require function body");
/* Template member functions aren't virtual:
* interface TestInterface { void tpl(T)(); }
* and so won't work in interfaces
*/
if ((pd = toParent()) != NULL &&
pd->isTemplateInstance() &&
(pd = toParent2()) != NULL &&
(id = pd->isInterfaceDeclaration()) != NULL)
{
error("template member functions are not allowed in interface %s", id->toChars());
}
cd = parent->isClassDeclaration();
if (cd)
{ int vi;
CtorDeclaration *ctor;
DtorDeclaration *dtor;
InvariantDeclaration *inv;
if (isCtorDeclaration())
{
// ctor = (CtorDeclaration *)this;
// if (!cd->ctor)
// cd->ctor = ctor;
return;
}
#if 0
dtor = isDtorDeclaration();
if (dtor)
{
if (cd->dtor)
error("multiple destructors for class %s", cd->toChars());
cd->dtor = dtor;
}
inv = isInvariantDeclaration();
if (inv)
{
cd->inv = inv;
}
if (isNewDeclaration())
{
if (!cd->aggNew)
cd->aggNew = (NewDeclaration *)(this);
}
if (isDelete())
{
if (cd->aggDelete)
error("multiple delete's for class %s", cd->toChars());
cd->aggDelete = (DeleteDeclaration *)(this);
}
#endif
if (storage_class & STCabstract)
cd->isabstract = 1;
// if static function, do not put in vtbl[]
if (!isVirtual())
{
//printf("\tnot virtual\n");
goto Ldone;
}
/* Find index of existing function in base class's vtbl[] to override
* (the index will be the same as in cd's current vtbl[])
*/
vi = cd->baseClass ? findVtblIndex((Dsymbols*)&cd->baseClass->vtbl, cd->baseClass->vtbl.dim)
: -1;
switch (vi)
{
case -1:
/* Didn't find one, so
* This is an 'introducing' function which gets a new
* slot in the vtbl[].
*/
// Verify this doesn't override previous final function
if (cd->baseClass)
{ Dsymbol *s = cd->baseClass->search(loc, ident, 0);
if (s)
{
FuncDeclaration *f = s->isFuncDeclaration();
f = f->overloadExactMatch(type);
if (f && f->isFinal() && f->prot() != PROTprivate)
error("cannot override final function %s", f->toPrettyChars());
}
}
if (isFinal())
{
if (isOverride())
error("is marked as override, but does not override any function");
cd->vtblFinal.push(this);
}
else
{
// Append to end of vtbl[]
//printf("\tintroducing function\n");
introducing = 1;
vi = cd->vtbl.dim;
cd->vtbl.push(this);
vtblIndex = vi;
}
break;
case -2: // can't determine because of fwd refs
cd->sizeok = 2; // can't finish due to forward reference
Module::dprogress = dprogress_save;
return;
default:
{ FuncDeclaration *fdv = (FuncDeclaration *)cd->baseClass->vtbl.tdata()[vi];
// This function is covariant with fdv
if (fdv->isFinal())
error("cannot override final function %s", fdv->toPrettyChars());
#if DMDV2
if (!isOverride())
warning(loc, "overrides base class function %s, but is not marked with 'override'", fdv->toPrettyChars());
#endif
if (fdv->toParent() == parent)
{
// If both are mixins, then error.
// If either is not, the one that is not overrides
// the other.
if (fdv->parent->isClassDeclaration())
break;
if (!this->parent->isClassDeclaration()
#if !BREAKABI
&& !isDtorDeclaration()
#endif
#if DMDV2
&& !isPostBlitDeclaration()
#endif
)
error("multiple overrides of same function");
}
cd->vtbl.tdata()[vi] = this;
vtblIndex = vi;
/* Remember which functions this overrides
*/
foverrides.push(fdv);
/* This works by whenever this function is called,
* it actually returns tintro, which gets dynamically
* cast to type. But we know that tintro is a base
* of type, so we could optimize it by not doing a
* dynamic cast, but just subtracting the isBaseOf()
* offset if the value is != null.
*/
if (fdv->tintro)
tintro = fdv->tintro;
else if (!type->equals(fdv->type))
{
/* Only need to have a tintro if the vptr
* offsets differ
*/
int offset;
if (fdv->type->nextOf()->isBaseOf(type->nextOf(), &offset))
{
tintro = fdv->type;
}
}
break;
}
}
/* Go through all the interface bases.
* If this function is covariant with any members of those interface
* functions, set the tintro.
*/
for (int i = 0; i < cd->interfaces_dim; i++)
{
BaseClass *b = cd->interfaces[i];
vi = findVtblIndex((Dsymbols *)&b->base->vtbl, b->base->vtbl.dim);
switch (vi)
{
case -1:
break;
case -2:
cd->sizeok = 2; // can't finish due to forward reference
Module::dprogress = dprogress_save;
return;
default:
{ FuncDeclaration *fdv = (FuncDeclaration *)b->base->vtbl.tdata()[vi];
Type *ti = NULL;
/* Remember which functions this overrides
*/
foverrides.push(fdv);
if (fdv->tintro)
ti = fdv->tintro;
else if (!type->equals(fdv->type))
{
/* Only need to have a tintro if the vptr
* offsets differ
*/
unsigned errors = global.errors;
global.gag++; // suppress printing of error messages
int offset;
int baseOf = fdv->type->nextOf()->isBaseOf(type->nextOf(), &offset);
global.gag--; // suppress printing of error messages
if (errors != global.errors)
{
// any error in isBaseOf() is a forward reference error, so we bail out
global.errors = errors;
cd->sizeok = 2; // can't finish due to forward reference
Module::dprogress = dprogress_save;
return;
}
if (baseOf)
{
ti = fdv->type;
}
}
if (ti)
{
if (tintro && !tintro->equals(ti))
{
error("incompatible covariant types %s and %s", tintro->toChars(), ti->toChars());
}
tintro = ti;
}
goto L2;
}
}
}
if (introducing && isOverride())
{
error("does not override any function");
}
L2: ;
/* Go through all the interface bases.
* Disallow overriding any final functions in the interface(s).
*/
for (int i = 0; i < cd->interfaces_dim; i++)
{
BaseClass *b = cd->interfaces[i];
if (b->base)
{
Dsymbol *s = search_function(b->base, ident);
if (s)
{
FuncDeclaration *f = s->isFuncDeclaration();
if (f)
{
f = f->overloadExactMatch(type);
if (f && f->isFinal() && f->prot() != PROTprivate)
error("cannot override final function %s.%s", b->base->toChars(), f->toPrettyChars());
}
}
}
}
}
else if (isOverride() && !parent->isTemplateInstance())
error("override only applies to class member functions");
/* Do not allow template instances to add virtual functions
* to a class.
*/
if (isVirtual())
{
TemplateInstance *ti = parent->isTemplateInstance();
if (ti)
{
// Take care of nested templates
while (1)
{
TemplateInstance *ti2 = ti->tempdecl->parent->isTemplateInstance();
if (!ti2)
break;
ti = ti2;
}
// If it's a member template
ClassDeclaration *cd = ti->tempdecl->isClassMember();
if (cd)
{
error("cannot use template to add virtual function to class '%s'", cd->toChars());
}
}
}
if (isMain())
{
// Check parameters to see if they are either () or (char[][] args)
switch (nparams)
{
case 0:
break;
case 1:
{
Parameter *arg0 = Parameter::getNth(f->parameters, 0);
if (arg0->type->ty != Tarray ||
arg0->type->nextOf()->ty != Tarray ||
arg0->type->nextOf()->nextOf()->ty != Tchar ||
arg0->storageClass & (STCout | STCref | STClazy))
goto Lmainerr;
break;
}
default:
goto Lmainerr;
}
if (!f->nextOf())
error("must return int or void");
else if (f->nextOf()->ty != Tint32 && f->nextOf()->ty != Tvoid)
error("must return int or void, not %s", f->nextOf()->toChars());
if (f->varargs)
{
Lmainerr:
error("parameters must be main() or main(string[] args)");
}
}
if (ident == Id::assign && (sd || cd))
{ // Disallow identity assignment operator.
// opAssign(...)
if (nparams == 0)
{ if (f->varargs == 1)
goto Lassignerr;
}
else
{
Parameter *arg0 = Parameter::getNth(f->parameters, 0);
Type *t0 = arg0->type->toBasetype();
Type *tb = sd ? sd->type : cd->type;
if (arg0->type->implicitConvTo(tb) ||
(sd && t0->ty == Tpointer && t0->nextOf()->implicitConvTo(tb))
)
{
if (nparams == 1)
goto Lassignerr;
Parameter *arg1 = Parameter::getNth(f->parameters, 1);
if (arg1->defaultArg)
goto Lassignerr;
}
}
}
if (isVirtual() && semanticRun != PASSsemanticdone)
{
/* Rewrite contracts as nested functions, then call them.
* Doing it as nested functions means that overriding functions
* can call them.
*/
if (frequire)
{ /* in { ... }
* becomes:
* void __require() { ... }
* __require();
*/
Loc loc = frequire->loc;
TypeFunction *tf = new TypeFunction(NULL, Type::tvoid, 0, LINKd);
FuncDeclaration *fd = new FuncDeclaration(loc, loc,
Id::require, STCundefined, tf);
fd->fbody = frequire;
Statement *s1 = new ExpStatement(loc, fd);
Expression *e = new CallExp(loc, new VarExp(loc, fd, 0), (Expressions *)NULL);
Statement *s2 = new ExpStatement(loc, e);
frequire = new CompoundStatement(loc, s1, s2);
fdrequire = fd;
}
if (!outId && f->nextOf() && f->nextOf()->toBasetype()->ty != Tvoid)
outId = Id::result; // provide a default
if (fensure)
{ /* out (result) { ... }
* becomes:
* tret __ensure(ref tret result) { ... }
* __ensure(result);
*/
Loc loc = fensure->loc;
Parameters *arguments = new Parameters();
Parameter *a = NULL;
if (outId)
{ a = new Parameter(STCref | STCconst, f->nextOf(), outId, NULL);
arguments->push(a);
}
TypeFunction *tf = new TypeFunction(arguments, Type::tvoid, 0, LINKd);
FuncDeclaration *fd = new FuncDeclaration(loc, loc,
Id::ensure, STCundefined, tf);
fd->fbody = fensure;
Statement *s1 = new ExpStatement(loc, fd);
Expression *eresult = NULL;
if (outId)
eresult = new IdentifierExp(loc, outId);
Expression *e = new CallExp(loc, new VarExp(loc, fd, 0), eresult);
Statement *s2 = new ExpStatement(loc, e);
fensure = new CompoundStatement(loc, s1, s2);
fdensure = fd;
}
}
Ldone:
Module::dprogress++;
semanticRun = PASSsemanticdone;
/* Save scope for possible later use (if we need the
* function internals)
*/
scope = new Scope(*sc);
scope->setNoFree();
return;
Lassignerr:
if (sd)
{
sd->hasIdentityAssign = 1; // don't need to generate it
goto Ldone;
}
error("identity assignment operator overload is illegal");
}
void FuncDeclaration::semantic2(Scope *sc)
{
}
// Do the semantic analysis on the internals of the function.
void FuncDeclaration::semantic3(Scope *sc)
{ TypeFunction *f;
VarDeclaration *argptr = NULL;
VarDeclaration *_arguments = NULL;
int nerrors = global.errors;
if (!parent)
{
if (global.errors)
return;
//printf("FuncDeclaration::semantic3(%s '%s', sc = %p)\n", kind(), toChars(), sc);
assert(0);
}
//printf("FuncDeclaration::semantic3('%s.%s', sc = %p, loc = %s)\n", parent->toChars(), toChars(), sc, loc.toChars());
//fflush(stdout);
//printf("storage class = x%x %x\n", sc->stc, storage_class);
//{ static int x; if (++x == 2) *(char*)0=0; }
//printf("\tlinkage = %d\n", sc->linkage);
//printf(" sc->incontract = %d\n", sc->incontract);
if (semanticRun >= PASSsemantic3)
return;
semanticRun = PASSsemantic3;
if (!type || type->ty != Tfunction)
return;
f = (TypeFunction *)(type);
#if 0
// Check the 'throws' clause
if (fthrows)
{
for (int i = 0; i < fthrows->dim; i++)
{
Type *t = fthrows->tdata()[i];
t = t->semantic(loc, sc);
if (!t->isClassHandle())
error("can only throw classes, not %s", t->toChars());
}
}
#endif
if (frequire)
{
for (int i = 0; i < foverrides.dim; i++)
{
FuncDeclaration *fdv = foverrides.tdata()[i];
if (fdv->fbody && !fdv->frequire)
{
error("cannot have an in contract when overriden function %s does not have an in contract", fdv->toPrettyChars());
break;
}
}
}
frequire = mergeFrequire(frequire);
fensure = mergeFensure(fensure);
if (fbody || frequire || fensure)
{
/* Symbol table into which we place parameters and nested functions,
* solely to diagnose name collisions.
*/
localsymtab = new DsymbolTable();
// Establish function scope
ScopeDsymbol *ss = new ScopeDsymbol();
ss->parent = sc->scopesym;
Scope *sc2 = sc->push(ss);
sc2->func = this;
sc2->parent = this;
sc2->callSuper = 0;
sc2->sbreak = NULL;
sc2->scontinue = NULL;
sc2->sw = NULL;
sc2->fes = fes;
sc2->linkage = LINKd;
sc2->stc &= ~(STCauto | STCscope | STCstatic | STCabstract | STCdeprecated |
STC_TYPECTOR | STCfinal | STCtls | STCgshared | STCref |
STCproperty | STCsafe | STCtrusted | STCsystem);
sc2->protection = PROTpublic;
sc2->explicitProtection = 0;
sc2->structalign = 8;
sc2->incontract = 0;
sc2->tf = NULL;
sc2->noctor = 0;
// Declare 'this'
AggregateDeclaration *ad = isThis();
if (ad)
{ VarDeclaration *v;
if (isFuncLiteralDeclaration() && isNested() && !sc->intypeof)
{
error("function literals cannot be class members");
return;
}
else
{
assert(!isNested() || sc->intypeof); // can't be both member and nested
assert(ad->handle);
Type *thandle = ad->handle;
#if STRUCTTHISREF
thandle = thandle->addMod(type->mod);
thandle = thandle->addStorageClass(storage_class);
//if (isPure())
//thandle = thandle->addMod(MODconst);
#else
if (storage_class & STCconst || type->isConst())
{
assert(0); // BUG: shared not handled
if (thandle->ty == Tclass)
thandle = thandle->constOf();
else
{ assert(thandle->ty == Tpointer);
thandle = thandle->nextOf()->constOf()->pointerTo();
}
}
else if (storage_class & STCimmutable || type->isImmutable())
{
if (thandle->ty == Tclass)
thandle = thandle->invariantOf();
else
{ assert(thandle->ty == Tpointer);
thandle = thandle->nextOf()->invariantOf()->pointerTo();
}
}
else if (storage_class & STCshared || type->isShared())
{
assert(0); // not implemented
}
#endif
v = new ThisDeclaration(loc, thandle);
//v = new ThisDeclaration(loc, isCtorDeclaration() ? ad->handle : thandle);
v->storage_class |= STCparameter;
#if STRUCTTHISREF
if (thandle->ty == Tstruct)
v->storage_class |= STCref;
#endif
v->semantic(sc2);
if (!sc2->insert(v))
assert(0);
v->parent = this;
vthis = v;
}
}
else if (isNested())
{
/* The 'this' for a nested function is the link to the
* enclosing function's stack frame.
* Note that nested functions and member functions are disjoint.
*/
VarDeclaration *v = new ThisDeclaration(loc, Type::tvoid->pointerTo());
v->storage_class |= STCparameter;
v->semantic(sc2);
if (!sc2->insert(v))
assert(0);
v->parent = this;
vthis = v;
}
// Declare hidden variable _arguments[] and _argptr
if (f->varargs == 1)
{
#if TARGET_NET
varArgs(sc2, f, argptr, _arguments);
#else
Type *t;
if (global.params.isX86_64)
{ // Declare save area for varargs registers
Type *t = new TypeIdentifier(loc, Id::va_argsave_t);
t = t->semantic(loc, sc);
if (t == Type::terror)
error("must import core.vararg to use variadic functions");
else
{
v_argsave = new VarDeclaration(loc, t, Id::va_argsave, NULL);
v_argsave->semantic(sc2);
sc2->insert(v_argsave);
v_argsave->parent = this;
}
}
if (f->linkage == LINKd)
{ // Declare _arguments[]
#if BREAKABI
v_arguments = new VarDeclaration(0, Type::typeinfotypelist->type, Id::_arguments_typeinfo, NULL);
v_arguments->storage_class = STCparameter;
v_arguments->semantic(sc2);
sc2->insert(v_arguments);
v_arguments->parent = this;
//t = Type::typeinfo->type->constOf()->arrayOf();
t = Type::typeinfo->type->arrayOf();
_arguments = new VarDeclaration(0, t, Id::_arguments, NULL);
_arguments->semantic(sc2);
sc2->insert(_arguments);
_arguments->parent = this;
#else
t = Type::typeinfo->type->arrayOf();
v_arguments = new VarDeclaration(0, t, Id::_arguments, NULL);