forked from dlang/dmd
/
func.c
4545 lines (3977 loc) · 136 KB
/
func.c
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2012 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;
if (type)
this->storage_class &= ~(STC_TYPECTOR | STC_FUNCATTR);
this->loc = loc;
this->endloc = endloc;
fthrows = NULL;
frequire = NULL;
fdrequire = NULL;
fdensure = NULL;
outId = NULL;
vresult = NULL;
returnLabel = NULL;
scout = NULL;
fensure = NULL;
fbody = NULL;
localsymtab = NULL;
vthis = NULL;
v_arguments = NULL;
#ifdef IN_GCC
v_argptr = NULL;
v_arguments_var = NULL;
#endif
v_argsave = NULL;
parameters = NULL;
labtab = NULL;
overnext = NULL;
vtblIndex = -1;
hasReturnExp = 0;
naked = 0;
inlineStatusExp = ILSuninitialized;
inlineStatusStmt = ILSuninitialized;
inlineNest = 0;
isArrayOp = 0;
semanticRun = PASSinit;
semantic3Errors = 0;
#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);
storage_class2 = 0;
hasReturnExp = 0;
nrvo_can = 1;
nrvo_var = NULL;
shidden = NULL;
#if DMDV2
builtin = BUILTINunknown;
tookAddressOf = 0;
requiresClosure = false;
flags = 0;
#endif
returns = NULL;
}
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;
bool doesoverride;
#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;
}
if (scope)
{ sc = scope;
scope = NULL;
}
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);
if (StructDeclaration *sd = ad->isStructDeclaration())
sd->makeNested();
}
//printf("function storage_class = x%llx, sc->stc = x%llx, %x\n", storage_class, sc->stc, Declaration::isFinal());
FuncLiteralDeclaration *fld = isFuncLiteralDeclaration();
if (fld && fld->treq)
linkage = ((TypeFunction *)fld->treq->nextOf())->linkage;
else
linkage = sc->linkage;
protection = sc->protection;
userAttributes = sc->userAttributes;
if (!originalType)
originalType = type;
if (!type->deco)
{
sc = sc->push();
sc->stc |= storage_class & STCdisable; // forward to function type
TypeFunction *tf = (TypeFunction *)type;
if (tf->isref) sc->stc |= STCref;
if (tf->isnothrow) sc->stc |= STCnothrow;
if (tf->isproperty) sc->stc |= STCproperty;
if (tf->purity == PUREfwdref) sc->stc |= STCpure;
if (tf->trust == TRUSTsafe) sc->stc |= STCsafe;
if (tf->trust == TRUSTsystem) sc->stc |= STCsystem;
if (tf->trust == TRUSTtrusted) sc->stc |= STCtrusted;
if (isCtorDeclaration())
sc->flags |= SCOPEctor;
sc->linkage = linkage;
/* Apply const, immutable, wild and shared storage class
* to the function type. Do this before type semantic.
*/
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();
break;
case STCconst:
case STCconst | STCwild:
type = type->makeConst();
break;
case STCshared | STCconst:
case STCshared | STCconst | STCwild:
type = type->makeSharedConst();
break;
case STCshared:
type = type->makeShared();
break;
case STCwild:
type = type->makeWild();
break;
case STCshared | STCwild:
type = type->makeSharedWild();
break;
case 0:
break;
default:
assert(0);
}
type = type->semantic(loc, sc);
sc = sc->pop();
}
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);
/* 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
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 (isOverride() && !isVirtual())
error("cannot override a non-virtual function");
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
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() ||
isNewDeclaration() || isDelete())
error("constructors, destructors, postblits, invariants, new and delete functions are not allowed in interface %s", id->toChars());
if (fbody && isVirtual())
error("function body only allowed in final functions 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");
cd = parent->isClassDeclaration();
if (cd)
{ size_t vi;
CtorDeclaration *ctor;
DtorDeclaration *dtor;
InvariantDeclaration *inv;
if (isCtorDeclaration())
{
// ctor = (CtorDeclaration *)this;
// if (!cd->ctor)
// cd->ctor = ctor;
goto Ldone;
}
#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;
}
// Suppress further errors if the return type is an error
if (type->nextOf() == Type::terror)
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;
doesoverride = FALSE;
switch (vi)
{
case -1:
Lintro:
/* 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())
{
// Don't check here, as it may override an interface function
//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 = SIZEOKfwd; // can't finish due to forward reference
Module::dprogress = dprogress_save;
return;
default:
{ FuncDeclaration *fdv = cd->baseClass->vtbl[vi]->isFuncDeclaration();
FuncDeclaration *fdc = cd->vtbl[vi]->isFuncDeclaration();
// This function is covariant with fdv
if (fdc->toParent() == parent)
{
//printf("vi = %d,\tthis = %p %s %s @ [%s]\n\tfdc = %p %s %s @ [%s]\n\tfdv = %p %s %s @ [%s]\n",
// vi, this, this->toChars(), this->type->toChars(), this->loc.toChars(),
// fdc, fdc ->toChars(), fdc ->type->toChars(), fdc ->loc.toChars(),
// fdv, fdv ->toChars(), fdv ->type->toChars(), fdv ->loc.toChars());
// fdc overrides fdv exactly, then this introduces new function.
if (fdc->type->mod == fdv->type->mod && this->type->mod != fdv->type->mod)
goto Lintro;
}
// This function overrides fdv
if (fdv->isFinal())
error("cannot override final function %s", fdv->toPrettyChars());
doesoverride = TRUE;
#if DMDV2
if (!isOverride())
::deprecation(loc, "overriding base class function without using override attribute is deprecated (%s overrides %s)", toPrettyChars(), fdv->toPrettyChars());
#endif
if (fdc->toParent() == parent)
{
// If both are mixins, or both are not, then error.
// If either is not, the one that is not overrides the other.
bool thismixin = this->parent->isClassDeclaration() != NULL;
bool fdcmixin = fdc->parent->isClassDeclaration() != NULL;
if (thismixin == fdcmixin)
{
error("multiple overrides of same function");
}
else if (!thismixin) // fdc overrides fdv
{ // this doesn't override any function
break;
}
}
cd->vtbl[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 (size_t 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 = SIZEOKfwd; // can't finish due to forward reference
Module::dprogress = dprogress_save;
return;
default:
{ FuncDeclaration *fdv = (FuncDeclaration *)b->base->vtbl[vi];
Type *ti = NULL;
/* Remember which functions this overrides
*/
foverrides.push(fdv);
#if DMDV2
/* Should we really require 'override' when implementing
* an interface function?
*/
//if (!isOverride())
//warning(loc, "overrides base class function %s, but is not marked with 'override'", fdv->toPrettyChars());
#endif
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 = SIZEOKfwd; // can't finish due to forward reference
Module::dprogress = dprogress_save;
return;
}
if (baseOf)
{
ti = fdv->type;
}
}
if (ti)
{
if (tintro)
{
if (!tintro->nextOf()->equals(ti->nextOf()) &&
!tintro->nextOf()->isBaseOf(ti->nextOf(), NULL) &&
!ti->nextOf()->isBaseOf(tintro->nextOf(), NULL))
{
error("incompatible covariant types %s and %s", tintro->toChars(), ti->toChars());
}
}
tintro = ti;
}
goto L2;
}
}
}
if (!doesoverride && isOverride())
{
Dsymbol *s = NULL;
for (size_t i = 0; i < cd->baseclasses->dim; i++)
{
s = (*cd->baseclasses)[i]->base->search_correct(ident);
if (s) break;
}
if (s)
error("does not override any function, did you mean to override '%s'?", s->toPrettyChars());
else
error("does not override any function");
}
L2: ;
/* Go through all the interface bases.
* Disallow overriding any final functions in the interface(s).
*/
for (size_t 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 (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;
}
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', %p, sc = %p, loc = %s)\n", parent->toChars(), toChars(), this, 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->flags & SCOPEcontract));
if (semanticRun >= PASSsemantic3)
return;
semanticRun = PASSsemantic3;
semantic3Errors = 0;
if (!type || type->ty != Tfunction)
return;
f = (TypeFunction *)(type);
if (!inferRetType && f->next->ty == Terror)
return;
#if 0
// Check the 'throws' clause
if (fthrows)
{
for (size_t i = 0; i < fthrows->dim; i++)
{
Type *t = (*fthrows)[i];
t = t->semantic(loc, sc);
if (!t->isClassHandle())
error("can only throw classes, not %s", t->toChars());
}
}
#endif
if (!fbody && inferRetType && !type->nextOf())
{
error("has no function body with return type inference");
return;
}
if (frequire)
{
for (size_t i = 0; i < foverrides.dim; i++)
{
FuncDeclaration *fdv = foverrides[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 | STCoverride |
STC_TYPECTOR | STCfinal | STCtls | STCgshared | STCref |
STCproperty | STCsafe | STCtrusted | STCsystem);
sc2->protection = PROTpublic;
sc2->explicitProtection = 0;
sc2->structalign = STRUCTALIGN_DEFAULT;
sc2->flags = sc->flags & ~SCOPEcontract;
sc2->tf = NULL;
sc2->noctor = 0;
sc2->speculative = sc->speculative || isSpeculative() != NULL;
sc2->userAttributes = NULL;
// Declare 'this'
AggregateDeclaration *ad = isThis();
if (ad)
{
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
}
vthis = declareThis(sc2, ad);
// Declare hidden variable _arguments[] and _argptr
if (f->varargs == 1)
{
Type *t;
#ifndef IN_GCC
if (global.params.is64bit && !global.params.isWindows)
{ // 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");
return;
}
else
{
v_argsave = new VarDeclaration(loc, t, Id::va_argsave, NULL);
v_argsave->semantic(sc2);
sc2->insert(v_argsave);
v_argsave->parent = this;
}
}
#endif
if (f->linkage == LINKd)
{ // Declare _arguments[]
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;
}
if (f->linkage == LINKd || (f->parameters && Parameter::dim(f->parameters)))
{ // Declare _argptr
#ifdef IN_GCC
t = d_gcc_builtin_va_list_d_type;
#else
t = Type::tvoid->pointerTo();
#endif
argptr = new VarDeclaration(0, t, Id::_argptr, NULL);
argptr->semantic(sc2);
sc2->insert(argptr);
argptr->parent = this;
}
}
#if 0
// Propagate storage class from tuple parameters to their element-parameters.
if (f->parameters)
{
for (size_t i = 0; i < f->parameters->dim; i++)
{ Parameter *arg = (*f->parameters)[i];
//printf("[%d] arg->type->ty = %d %s\n", i, arg->type->ty, arg->type->toChars());
if (arg->type->ty == Ttuple)
{ TypeTuple *t = (TypeTuple *)arg->type;
size_t dim = Parameter::dim(t->arguments);
for (size_t j = 0; j < dim; j++)
{ Parameter *narg = Parameter::getNth(t->arguments, j);
narg->storageClass = arg->storageClass;
}
}
}
}