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template.c
5548 lines (4929 loc) · 161 KB
/
template.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.
// Handle template implementation
#include <stdio.h>
#include <assert.h>
#include "root.h"
#include "rmem.h"
#include "stringtable.h"
#include "mtype.h"
#include "template.h"
#include "init.h"
#include "expression.h"
#include "scope.h"
#include "module.h"
#include "aggregate.h"
#include "declaration.h"
#include "dsymbol.h"
#include "mars.h"
#include "dsymbol.h"
#include "identifier.h"
#include "hdrgen.h"
#include "id.h"
#if WINDOWS_SEH
#include <windows.h>
long __cdecl __ehfilter(LPEXCEPTION_POINTERS ep);
#endif
#define LOG 0
/********************************************
* These functions substitute for dynamic_cast. dynamic_cast does not work
* on earlier versions of gcc.
*/
Expression *isExpression(Object *o)
{
//return dynamic_cast<Expression *>(o);
if (!o || o->dyncast() != DYNCAST_EXPRESSION)
return NULL;
return (Expression *)o;
}
Dsymbol *isDsymbol(Object *o)
{
//return dynamic_cast<Dsymbol *>(o);
if (!o || o->dyncast() != DYNCAST_DSYMBOL)
return NULL;
return (Dsymbol *)o;
}
Type *isType(Object *o)
{
//return dynamic_cast<Type *>(o);
if (!o || o->dyncast() != DYNCAST_TYPE)
return NULL;
return (Type *)o;
}
Tuple *isTuple(Object *o)
{
//return dynamic_cast<Tuple *>(o);
if (!o || o->dyncast() != DYNCAST_TUPLE)
return NULL;
return (Tuple *)o;
}
/**************************************
* Is this Object an error?
*/
int isError(Object *o)
{
Type *t = isType(o);
if (t)
return (t->ty == Terror);
Expression *e = isExpression(o);
if (e)
return (e->op == TOKerror);
Tuple *v = isTuple(o);
if (v)
return arrayObjectIsError(&v->objects);
return 0;
}
/**************************************
* Are any of the Objects an error?
*/
int arrayObjectIsError(Objects *args)
{
for (size_t i = 0; i < args->dim; i++)
{
Object *o = (Object *)args->data[i];
if (isError(o))
return 1;
}
return 0;
}
/***********************
* Try to get arg as a type.
*/
Type *getType(Object *o)
{
Type *t = isType(o);
if (!t)
{ Expression *e = isExpression(o);
if (e)
t = e->type;
}
return t;
}
Dsymbol *getDsymbol(Object *oarg)
{
Dsymbol *sa;
Expression *ea = isExpression(oarg);
if (ea)
{ // Try to convert Expression to symbol
if (ea->op == TOKvar)
sa = ((VarExp *)ea)->var;
else if (ea->op == TOKfunction)
sa = ((FuncExp *)ea)->fd;
else
sa = NULL;
}
else
{ // Try to convert Type to symbol
Type *ta = isType(oarg);
if (ta)
sa = ta->toDsymbol(NULL);
else
sa = isDsymbol(oarg); // if already a symbol
}
return sa;
}
/******************************
* If o1 matches o2, return 1.
* Else, return 0.
*/
int match(Object *o1, Object *o2, TemplateDeclaration *tempdecl, Scope *sc)
{
Type *t1 = isType(o1);
Type *t2 = isType(o2);
Expression *e1 = isExpression(o1);
Expression *e2 = isExpression(o2);
Dsymbol *s1 = isDsymbol(o1);
Dsymbol *s2 = isDsymbol(o2);
Tuple *v1 = isTuple(o1);
Tuple *v2 = isTuple(o2);
//printf("\t match t1 %p t2 %p, e1 %p e2 %p, s1 %p s2 %p, v1 %p v2 %p\n", t1,t2,e1,e2,s1,s2,v1,v2);
/* A proper implementation of the various equals() overrides
* should make it possible to just do o1->equals(o2), but
* we'll do that another day.
*/
if (t1)
{
/* if t1 is an instance of ti, then give error
* about recursive expansions.
*/
Dsymbol *s = t1->toDsymbol(sc);
if (s && s->parent)
{ TemplateInstance *ti1 = s->parent->isTemplateInstance();
if (ti1 && ti1->tempdecl == tempdecl)
{
for (Scope *sc1 = sc; sc1; sc1 = sc1->enclosing)
{
if (sc1->scopesym == ti1)
{
error("recursive template expansion for template argument %s", t1->toChars());
return 1; // fake a match
}
}
}
}
//printf("t1 = %s\n", t1->toChars());
//printf("t2 = %s\n", t2->toChars());
if (!t2 || !t1->equals(t2))
goto Lnomatch;
}
else if (e1)
{
#if 0
if (e1 && e2)
{
printf("match %d\n", e1->equals(e2));
e1->print();
e2->print();
e1->type->print();
e2->type->print();
}
#endif
if (!e2)
goto Lnomatch;
if (!e1->equals(e2))
goto Lnomatch;
}
else if (s1)
{
if (!s2 || !s1->equals(s2) || s1->parent != s2->parent)
{
if (s2)
{
VarDeclaration *v1 = s1->isVarDeclaration();
VarDeclaration *v2 = s2->isVarDeclaration();
if (v1 && v2 && v1->storage_class & v2->storage_class & STCmanifest)
{ ExpInitializer *ei1 = v1->init->isExpInitializer();
ExpInitializer *ei2 = v2->init->isExpInitializer();
if (ei1 && ei2 && ei1->exp->equals(ei2->exp))
goto Lmatch;
}
}
goto Lnomatch;
}
#if DMDV2
VarDeclaration *v1 = s1->isVarDeclaration();
VarDeclaration *v2 = s2->isVarDeclaration();
if (v1 && v2 && v1->storage_class & v2->storage_class & STCmanifest)
{ ExpInitializer *ei1 = v1->init->isExpInitializer();
ExpInitializer *ei2 = v2->init->isExpInitializer();
if (ei1 && ei2 && !ei1->exp->equals(ei2->exp))
goto Lnomatch;
}
#endif
}
else if (v1)
{
if (!v2)
goto Lnomatch;
if (v1->objects.dim != v2->objects.dim)
goto Lnomatch;
for (size_t i = 0; i < v1->objects.dim; i++)
{
if (!match((Object *)v1->objects.data[i],
(Object *)v2->objects.data[i],
tempdecl, sc))
goto Lnomatch;
}
}
Lmatch:
//printf("match\n");
return 1; // match
Lnomatch:
//printf("nomatch\n");
return 0; // nomatch;
}
/************************************
* Match an array of them.
*/
int arrayObjectMatch(Objects *oa1, Objects *oa2, TemplateDeclaration *tempdecl, Scope *sc)
{
if (oa1 == oa2)
return 1;
if (oa1->dim != oa2->dim)
return 0;
for (size_t j = 0; j < oa1->dim; j++)
{ Object *o1 = (Object *)oa1->data[j];
Object *o2 = (Object *)oa2->data[j];
if (!match(o1, o2, tempdecl, sc))
{
return 0;
}
}
return 1;
}
/****************************************
*/
void ObjectToCBuffer(OutBuffer *buf, HdrGenState *hgs, Object *oarg)
{
//printf("ObjectToCBuffer()\n");
Type *t = isType(oarg);
Expression *e = isExpression(oarg);
Dsymbol *s = isDsymbol(oarg);
Tuple *v = isTuple(oarg);
if (t)
{ //printf("\tt: %s ty = %d\n", t->toChars(), t->ty);
t->toCBuffer(buf, NULL, hgs);
}
else if (e)
e->toCBuffer(buf, hgs);
else if (s)
{
char *p = s->ident ? s->ident->toChars() : s->toChars();
buf->writestring(p);
}
else if (v)
{
Objects *args = &v->objects;
for (size_t i = 0; i < args->dim; i++)
{
if (i)
buf->writeByte(',');
Object *o = (Object *)args->data[i];
ObjectToCBuffer(buf, hgs, o);
}
}
else if (!oarg)
{
buf->writestring("NULL");
}
else
{
#ifdef DEBUG
printf("bad Object = %p\n", oarg);
#endif
assert(0);
}
}
#if DMDV2
Object *objectSyntaxCopy(Object *o)
{
if (!o)
return NULL;
Type *t = isType(o);
if (t)
return t->syntaxCopy();
Expression *e = isExpression(o);
if (e)
return e->syntaxCopy();
return o;
}
#endif
/* ======================== TemplateDeclaration ============================= */
TemplateDeclaration::TemplateDeclaration(Loc loc, Identifier *id,
TemplateParameters *parameters, Expression *constraint, Dsymbols *decldefs, int ismixin)
: ScopeDsymbol(id)
{
#if LOG
printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id->toChars());
#endif
#if 0
if (parameters)
for (int i = 0; i < parameters->dim; i++)
{ TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
//printf("\tparameter[%d] = %p\n", i, tp);
TemplateTypeParameter *ttp = tp->isTemplateTypeParameter();
if (ttp)
{
printf("\tparameter[%d] = %s : %s\n", i, tp->ident->toChars(), ttp->specType ? ttp->specType->toChars() : "");
}
}
#endif
this->loc = loc;
this->parameters = parameters;
this->origParameters = parameters;
this->constraint = constraint;
this->members = decldefs;
this->overnext = NULL;
this->overroot = NULL;
this->semanticRun = 0;
this->onemember = NULL;
this->literal = 0;
this->ismixin = ismixin;
this->previous = NULL;
}
Dsymbol *TemplateDeclaration::syntaxCopy(Dsymbol *)
{
//printf("TemplateDeclaration::syntaxCopy()\n");
TemplateDeclaration *td;
TemplateParameters *p;
p = NULL;
if (parameters)
{
p = new TemplateParameters();
p->setDim(parameters->dim);
for (int i = 0; i < p->dim; i++)
{ TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
p->data[i] = (void *)tp->syntaxCopy();
}
}
Expression *e = NULL;
if (constraint)
e = constraint->syntaxCopy();
Dsymbols *d = Dsymbol::arraySyntaxCopy(members);
td = new TemplateDeclaration(loc, ident, p, e, d, ismixin);
return td;
}
void TemplateDeclaration::semantic(Scope *sc)
{
#if LOG
printf("TemplateDeclaration::semantic(this = %p, id = '%s')\n", this, ident->toChars());
printf("sc->stc = %llx\n", sc->stc);
printf("sc->module = %s\n", sc->module->toChars());
#endif
if (semanticRun)
return; // semantic() already run
semanticRun = 1;
if (sc->module && sc->module->ident == Id::object && ident == Id::AssociativeArray)
{ Type::associativearray = this;
}
if (sc->func)
{
#if DMDV1
error("cannot declare template at function scope %s", sc->func->toChars());
#endif
}
if (/*global.params.useArrayBounds &&*/ sc->module)
{
// Generate this function as it may be used
// when template is instantiated in other modules
sc->module->toModuleArray();
}
if (/*global.params.useAssert &&*/ sc->module)
{
// Generate this function as it may be used
// when template is instantiated in other modules
sc->module->toModuleAssert();
}
#if DMDV2
if (/*global.params.useUnitTests &&*/ sc->module)
{
// Generate this function as it may be used
// when template is instantiated in other modules
sc->module->toModuleUnittest();
}
#endif
/* Remember Scope for later instantiations, but make
* a copy since attributes can change.
*/
this->scope = new Scope(*sc);
this->scope->setNoFree();
// Set up scope for parameters
ScopeDsymbol *paramsym = new ScopeDsymbol();
paramsym->parent = sc->parent;
Scope *paramscope = sc->push(paramsym);
paramscope->parameterSpecialization = 1;
paramscope->stc = 0;
if (!parent)
parent = sc->parent;
if (global.params.doDocComments)
{
origParameters = new TemplateParameters();
origParameters->setDim(parameters->dim);
for (int i = 0; i < parameters->dim; i++)
{
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
origParameters->data[i] = (void *)tp->syntaxCopy();
}
}
for (int i = 0; i < parameters->dim; i++)
{
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
tp->declareParameter(paramscope);
}
for (int i = 0; i < parameters->dim; i++)
{
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
tp->semantic(paramscope);
if (i + 1 != parameters->dim && tp->isTemplateTupleParameter())
error("template tuple parameter must be last one");
}
paramscope->pop();
if (members)
{
Dsymbol *s;
if (Dsymbol::oneMembers(members, &s))
{
if (s && s->ident && s->ident->equals(ident))
{
onemember = s;
s->parent = this;
}
}
}
/* BUG: should check:
* o no virtual functions or non-static data members of classes
*/
}
const char *TemplateDeclaration::kind()
{
return (onemember && onemember->isAggregateDeclaration())
? onemember->kind()
: (char *)"template";
}
/**********************************
* Overload existing TemplateDeclaration 'this' with the new one 's'.
* Return !=0 if successful; i.e. no conflict.
*/
int TemplateDeclaration::overloadInsert(Dsymbol *s)
{
TemplateDeclaration **pf;
TemplateDeclaration *f;
#if LOG
printf("TemplateDeclaration::overloadInsert('%s')\n", s->toChars());
#endif
f = s->isTemplateDeclaration();
if (!f)
return FALSE;
TemplateDeclaration *pthis = this;
for (pf = &pthis; *pf; pf = &(*pf)->overnext)
{
#if 0
// Conflict if TemplateParameter's match
// Will get caught anyway later with TemplateInstance, but
// should check it now.
TemplateDeclaration *f2 = *pf;
if (f->parameters->dim != f2->parameters->dim)
goto Lcontinue;
for (int i = 0; i < f->parameters->dim; i++)
{ TemplateParameter *p1 = (TemplateParameter *)f->parameters->data[i];
TemplateParameter *p2 = (TemplateParameter *)f2->parameters->data[i];
if (!p1->overloadMatch(p2))
goto Lcontinue;
}
#if LOG
printf("\tfalse: conflict\n");
#endif
return FALSE;
Lcontinue:
;
#endif
}
f->overroot = this;
*pf = f;
#if LOG
printf("\ttrue: no conflict\n");
#endif
return TRUE;
}
/****************************
* Declare all the function parameters as variables
* and add them to the scope
*/
void TemplateDeclaration::makeParamNamesVisibleInConstraint(Scope *paramscope)
{
/* We do this ONLY if there is only one function in the template.
*/
FuncDeclaration *fd = onemember && onemember->toAlias() ?
onemember->toAlias()->isFuncDeclaration() : NULL;
if (fd)
{
paramscope->parent = fd;
int fvarargs; // function varargs
Parameters *fparameters = fd->getParameters(&fvarargs);
size_t nfparams = Parameter::dim(fparameters); // Num function parameters
for (int i = 0; i < nfparams; i++)
{
Parameter *fparam = Parameter::getNth(fparameters, i)->syntaxCopy();
if (!fparam->ident)
continue; // don't add it, if it has no name
Type *vtype = fparam->type->syntaxCopy();
// isPure will segfault if called on a ctor, because fd->type is null.
if (fd->type && fd->isPure())
vtype = vtype->addMod(MODconst);
VarDeclaration *v = new VarDeclaration(loc, vtype, fparam->ident, NULL);
v->storage_class |= STCparameter;
// Not sure if this condition is correct/necessary.
// It's from func.c
if (//fd->type && fd->type->ty == Tfunction &&
fvarargs == 2 && i + 1 == nfparams)
v->storage_class |= STCvariadic;
v->storage_class |= fparam->storageClass & (STCin | STCout | STCref | STClazy | STCfinal | STC_TYPECTOR | STCnodtor);
v->semantic(paramscope);
if (!paramscope->insert(v))
error("parameter %s.%s is already defined", toChars(), v->toChars());
else
v->parent = this;
}
}
}
/***************************************
* Given that ti is an instance of this TemplateDeclaration,
* deduce the types of the parameters to this, and store
* those deduced types in dedtypes[].
* Input:
* flag 1: don't do semantic() because of dummy types
* 2: don't change types in matchArg()
* Output:
* dedtypes deduced arguments
* Return match level.
*/
MATCH TemplateDeclaration::matchWithInstance(TemplateInstance *ti,
Objects *dedtypes, int flag)
{ MATCH m;
int dedtypes_dim = dedtypes->dim;
#define LOGM 0
#if LOGM
printf("\n+TemplateDeclaration::matchWithInstance(this = %s, ti = %s, flag = %d)\n", toChars(), ti->toChars(), flag);
#endif
#if 0
printf("dedtypes->dim = %d, parameters->dim = %d\n", dedtypes_dim, parameters->dim);
if (ti->tiargs->dim)
printf("ti->tiargs->dim = %d, [0] = %p\n",
ti->tiargs->dim,
ti->tiargs->data[0]);
#endif
dedtypes->zero();
int parameters_dim = parameters->dim;
int variadic = isVariadic() != NULL;
// If more arguments than parameters, no match
if (ti->tiargs->dim > parameters_dim && !variadic)
{
#if LOGM
printf(" no match: more arguments than parameters\n");
#endif
return MATCHnomatch;
}
assert(dedtypes_dim == parameters_dim);
assert(dedtypes_dim >= ti->tiargs->dim || variadic);
// Set up scope for parameters
assert((size_t)scope > 0x10000);
ScopeDsymbol *paramsym = new ScopeDsymbol();
paramsym->parent = scope->parent;
Scope *paramscope = scope->push(paramsym);
paramscope->stc = 0;
// Attempt type deduction
m = MATCHexact;
for (int i = 0; i < dedtypes_dim; i++)
{ MATCH m2;
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
Declaration *sparam;
//printf("\targument [%d]\n", i);
#if LOGM
//printf("\targument [%d] is %s\n", i, oarg ? oarg->toChars() : "null");
TemplateTypeParameter *ttp = tp->isTemplateTypeParameter();
if (ttp)
printf("\tparameter[%d] is %s : %s\n", i, tp->ident->toChars(), ttp->specType ? ttp->specType->toChars() : "");
#endif
#if DMDV1
m2 = tp->matchArg(paramscope, ti->tiargs, i, parameters, dedtypes, &sparam);
#else
m2 = tp->matchArg(paramscope, ti->tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0);
#endif
//printf("\tm2 = %d\n", m2);
if (m2 == MATCHnomatch)
{
#if 0
printf("\tmatchArg() for parameter %i failed\n", i);
#endif
goto Lnomatch;
}
if (m2 < m)
m = m2;
if (!flag)
sparam->semantic(paramscope);
if (!paramscope->insert(sparam))
goto Lnomatch;
}
if (!flag)
{
/* Any parameter left without a type gets the type of
* its corresponding arg
*/
for (int i = 0; i < dedtypes_dim; i++)
{
if (!dedtypes->data[i])
{ assert(i < ti->tiargs->dim);
dedtypes->data[i] = ti->tiargs->data[i];
}
}
}
#if DMDV2
if (m && constraint && !(flag & 1))
{ /* Check to see if constraint is satisfied.
*/
makeParamNamesVisibleInConstraint(paramscope);
Expression *e = constraint->syntaxCopy();
Scope *sc = paramscope->push();
sc->flags |= SCOPEstaticif;
e = e->semantic(sc);
sc->pop();
e = e->optimize(WANTvalue | WANTinterpret);
if (e->isBool(TRUE))
;
else if (e->isBool(FALSE))
goto Lnomatch;
else
{
e->error("constraint %s is not constant or does not evaluate to a bool", e->toChars());
}
}
#endif
#if LOGM
// Print out the results
printf("--------------------------\n");
printf("template %s\n", toChars());
printf("instance %s\n", ti->toChars());
if (m)
{
for (int i = 0; i < dedtypes_dim; i++)
{
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
Object *oarg;
printf(" [%d]", i);
if (i < ti->tiargs->dim)
oarg = (Object *)ti->tiargs->data[i];
else
oarg = NULL;
tp->print(oarg, (Object *)dedtypes->data[i]);
}
}
else
goto Lnomatch;
#endif
#if LOGM
printf(" match = %d\n", m);
#endif
goto Lret;
Lnomatch:
#if LOGM
printf(" no match\n");
#endif
m = MATCHnomatch;
Lret:
paramscope->pop();
#if LOGM
printf("-TemplateDeclaration::matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m);
#endif
return m;
}
/********************************************
* Determine partial specialization order of 'this' vs td2.
* Returns:
* match this is at least as specialized as td2
* 0 td2 is more specialized than this
*/
MATCH TemplateDeclaration::leastAsSpecialized(TemplateDeclaration *td2)
{
/* This works by taking the template parameters to this template
* declaration and feeding them to td2 as if it were a template
* instance.
* If it works, then this template is at least as specialized
* as td2.
*/
TemplateInstance ti(0, ident); // create dummy template instance
Objects dedtypes;
#define LOG_LEASTAS 0
#if LOG_LEASTAS
printf("%s.leastAsSpecialized(%s)\n", toChars(), td2->toChars());
#endif
// Set type arguments to dummy template instance to be types
// generated from the parameters to this template declaration
ti.tiargs = new Objects();
ti.tiargs->setDim(parameters->dim);
for (int i = 0; i < ti.tiargs->dim; i++)
{
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
void *p = tp->dummyArg();
if (p)
ti.tiargs->data[i] = p;
else
ti.tiargs->setDim(i);
}
// Temporary Array to hold deduced types
//dedtypes.setDim(parameters->dim);
dedtypes.setDim(td2->parameters->dim);
// Attempt a type deduction
MATCH m = td2->matchWithInstance(&ti, &dedtypes, 1);
if (m)
{
/* A non-variadic template is more specialized than a
* variadic one.
*/
if (isVariadic() && !td2->isVariadic())
goto L1;
#if LOG_LEASTAS
printf(" matches %d, so is least as specialized\n", m);
#endif
return m;
}
L1:
#if LOG_LEASTAS
printf(" doesn't match, so is not as specialized\n");
#endif
return MATCHnomatch;
}
/*************************************************
* Match function arguments against a specific template function.
* Input:
* loc instantiation location
* targsi Expression/Type initial list of template arguments
* ethis 'this' argument if !NULL
* fargs arguments to function
* Output:
* dedargs Expression/Type deduced template arguments
* Returns:
* match level
*/
MATCH TemplateDeclaration::deduceFunctionTemplateMatch(Scope *sc, Loc loc, Objects *targsi,
Expression *ethis, Expressions *fargs,
Objects *dedargs)
{
size_t i;
size_t nfparams;
size_t nfargs;
size_t nargsi; // array size of targsi
int fptupindex = -1;
int tuple_dim = 0;
MATCH match = MATCHexact;
FuncDeclaration *fd = onemember->toAlias()->isFuncDeclaration();
Parameters *fparameters; // function parameter list
int fvarargs; // function varargs
Objects dedtypes; // for T:T*, the dedargs is the T*, dedtypes is the T
#if 0
printf("\nTemplateDeclaration::deduceFunctionTemplateMatch() %s\n", toChars());
for (i = 0; i < fargs->dim; i++)
{ Expression *e = (Expression *)fargs->data[i];
printf("\tfarg[%d] is %s, type is %s\n", i, e->toChars(), e->type->toChars());
}
printf("fd = %s\n", fd->toChars());
printf("fd->type = %s\n", fd->type->toChars());
if (ethis)
printf("ethis->type = %s\n", ethis->type->toChars());
#endif
assert((size_t)scope > 0x10000);
dedargs->setDim(parameters->dim);
dedargs->zero();
dedtypes.setDim(parameters->dim);
dedtypes.zero();
// Set up scope for parameters
ScopeDsymbol *paramsym = new ScopeDsymbol();
paramsym->parent = scope->parent;
Scope *paramscope = scope->push(paramsym);
paramscope->stc = 0;
TemplateTupleParameter *tp = isVariadic();
int tp_is_declared = 0;
#if 0
for (i = 0; i < dedargs->dim; i++)
{
printf("\tdedarg[%d] = ", i);
Object *oarg = (Object *)dedargs->data[i];
if (oarg) printf("%s", oarg->toChars());
printf("\n");
}
#endif
nargsi = 0;
if (targsi)
{ // Set initial template arguments
nargsi = targsi->dim;
size_t n = parameters->dim;
if (tp)
n--;
if (nargsi > n)
{ if (!tp)
goto Lnomatch;
/* The extra initial template arguments
* now form the tuple argument.
*/
Tuple *t = new Tuple();
assert(parameters->dim);
dedargs->data[parameters->dim - 1] = (void *)t;
tuple_dim = nargsi - n;
t->objects.setDim(tuple_dim);
for (size_t i = 0; i < tuple_dim; i++)
{
t->objects.data[i] = (void *)targsi->data[n + i];
}
declareParameter(paramscope, tp, t);
tp_is_declared = 1;
}
else
n = nargsi;
memcpy(dedargs->data, targsi->data, n * sizeof(*dedargs->data));
for (size_t i = 0; i < n; i++)
{ assert(i < parameters->dim);
TemplateParameter *tp = (TemplateParameter *)parameters->data[i];
MATCH m;
Declaration *sparam = NULL;
m = tp->matchArg(paramscope, dedargs, i, parameters, &dedtypes, &sparam);
//printf("\tdeduceType m = %d\n", m);
if (m == MATCHnomatch)
goto Lnomatch;
if (m < match)
match = m;
sparam->semantic(paramscope);
if (!paramscope->insert(sparam))
goto Lnomatch;
}
}
#if 0
for (i = 0; i < dedargs->dim; i++)
{
printf("\tdedarg[%d] = ", i);
Object *oarg = (Object *)dedargs->data[i];
if (oarg) printf("%s", oarg->toChars());
printf("\n");
}
#endif
fparameters = fd->getParameters(&fvarargs);
nfparams = Parameter::dim(fparameters); // number of function parameters
nfargs = fargs ? fargs->dim : 0; // number of function arguments
/* Check for match of function arguments with variadic template
* parameter, such as:
*
* template Foo(T, A...) { void Foo(T t, A a); }
* void main() { Foo(1,2,3); }
*/
if (tp) // if variadic
{