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expression.c
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expression.c
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// Compiler implementation of the D programming language
// Copyright (c) 1999-2013 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 <stdlib.h>
#include <ctype.h>
#include <math.h>
#include <assert.h>
#if _MSC_VER
#include <complex>
#else
#include <complex.h>
#endif
#include "rmem.h"
#include "port.h"
#include "root.h"
#include "target.h"
#include "mtype.h"
#include "init.h"
#include "expression.h"
#include "template.h"
#include "utf.h"
#include "enum.h"
#include "scope.h"
#include "statement.h"
#include "declaration.h"
#include "aggregate.h"
#include "import.h"
#include "id.h"
#include "dsymbol.h"
#include "module.h"
#include "attrib.h"
#include "hdrgen.h"
#include "parse.h"
#include "doc.h"
Expression *createTypeInfoArray(Scope *sc, Expression *args[], size_t dim);
Expression *expandVar(int result, VarDeclaration *v);
void functionToCBuffer2(TypeFunction *t, OutBuffer *buf, HdrGenState *hgs, int mod, const char *kind);
#define LOGSEMANTIC 0
/*************************************************************
* Given var, we need to get the
* right 'this' pointer if var is in an outer class, but our
* existing 'this' pointer is in an inner class.
* Input:
* e1 existing 'this'
* ad struct or class we need the correct 'this' for
* var the specific member of ad we're accessing
*/
Expression *getRightThis(Loc loc, Scope *sc, AggregateDeclaration *ad,
Expression *e1, Declaration *var)
{
//printf("\ngetRightThis(e1 = %s, ad = %s, var = %s)\n", e1->toChars(), ad->toChars(), var->toChars());
L1:
Type *t = e1->type->toBasetype();
//printf("e1->type = %s, var->type = %s\n", e1->type->toChars(), var->type->toChars());
/* If e1 is not the 'this' pointer for ad
*/
if (ad &&
!(t->ty == Tpointer && t->nextOf()->ty == Tstruct &&
((TypeStruct *)t->nextOf())->sym == ad)
&&
!(t->ty == Tstruct &&
((TypeStruct *)t)->sym == ad)
)
{
ClassDeclaration *cd = ad->isClassDeclaration();
ClassDeclaration *tcd = t->isClassHandle();
/* e1 is the right this if ad is a base class of e1
*/
if (!cd || !tcd ||
!(tcd == cd || cd->isBaseOf(tcd, NULL))
)
{
/* Only classes can be inner classes with an 'outer'
* member pointing to the enclosing class instance
*/
if (tcd && tcd->isNested())
{ /* e1 is the 'this' pointer for an inner class: tcd.
* Rewrite it as the 'this' pointer for the outer class.
*/
e1 = new DotVarExp(loc, e1, tcd->vthis);
e1->type = tcd->vthis->type;
e1->type = e1->type->addMod(t->mod);
// Do not call checkNestedRef()
//e1 = e1->semantic(sc);
// Skip up over nested functions, and get the enclosing
// class type.
int n = 0;
Dsymbol *s;
for (s = tcd->toParent();
s && s->isFuncDeclaration();
s = s->toParent())
{ FuncDeclaration *f = s->isFuncDeclaration();
if (f->vthis)
{
//printf("rewriting e1 to %s's this\n", f->toChars());
n++;
e1 = new VarExp(loc, f->vthis);
}
else
{
e1->error("need 'this' of type %s to access member %s"
" from static function %s",
ad->toChars(), var->toChars(), f->toChars());
e1 = new ErrorExp();
return e1;
}
}
if (s && s->isClassDeclaration())
{ e1->type = s->isClassDeclaration()->type;
e1->type = e1->type->addMod(t->mod);
if (n > 1)
e1 = e1->semantic(sc);
}
else
e1 = e1->semantic(sc);
goto L1;
}
/* Can't find a path from e1 to ad
*/
e1->error("this for %s needs to be type %s not type %s",
var->toChars(), ad->toChars(), t->toChars());
e1 = new ErrorExp();
}
}
return e1;
}
/*****************************************
* Determine if 'this' is available.
* If it is, return the FuncDeclaration that has it.
*/
FuncDeclaration *hasThis(Scope *sc)
{
//printf("hasThis()\n");
Dsymbol *p = sc->parent;
while (p && p->isTemplateMixin())
p = p->parent;
FuncDeclaration *fdthis = p ? p->isFuncDeclaration() : NULL;
//printf("fdthis = %p, '%s'\n", fdthis, fdthis ? fdthis->toChars() : "");
/* Special case for inside template constraint
*/
if (fdthis && (sc->flags & SCOPEstaticif) && fdthis->parent->isTemplateDeclaration())
{
//TemplateDeclaration *td = fdthis->parent->isTemplateDeclaration();
//printf("[%s] td = %s, fdthis->vthis = %p\n", td->loc.toChars(), td->toChars(), fdthis->vthis);
return fdthis->vthis ? fdthis : NULL;
}
// Go upwards until we find the enclosing member function
FuncDeclaration *fd = fdthis;
while (1)
{
if (!fd)
{
goto Lno;
}
if (!fd->isNested())
break;
Dsymbol *parent = fd->parent;
while (1)
{
if (!parent)
goto Lno;
TemplateInstance *ti = parent->isTemplateInstance();
if (ti)
parent = ti->parent;
else
break;
}
fd = parent->isFuncDeclaration();
}
if (!fd->isThis())
{ //printf("test '%s'\n", fd->toChars());
goto Lno;
}
assert(fd->vthis);
return fd;
Lno:
return NULL; // don't have 'this' available
}
bool isNeedThisScope(Scope *sc, Declaration *d)
{
if (sc->intypeof == 1)
return false;
AggregateDeclaration *ad = d->isThis();
if (!ad)
return false;
//printf("d = %s, ad = %s\n", d->toChars(), ad->toChars());
for (Dsymbol *s = sc->parent; s; s = s->toParent2())
{
//printf("\ts = %s %s, toParent2() = %p\n", s->kind(), s->toChars(), s->toParent2());
if (AggregateDeclaration *ad2 = s->isAggregateDeclaration())
{
//printf("\t ad2 = %s\n", ad2->toChars());
if (ad2 == ad)
return false;
else if (ad2->isNested())
continue;
else
return true;
}
if (FuncDeclaration *f = s->isFuncDeclaration())
{
if (f->isFuncLiteralDeclaration())
continue;
if (f->isMember2())
break;
if (TemplateDeclaration *td = f->parent->isTemplateDeclaration())
{
if ((td->scope->stc & STCstatic) && td->isMember())
break; // no valid 'this'
}
}
}
return true;
}
Expression *checkRightThis(Scope *sc, Expression *e)
{
if (e->op == TOKvar && e->type->ty != Terror)
{
VarExp *ve = (VarExp *)e;
if (isNeedThisScope(sc, ve->var))
{
//printf("checkRightThis sc->intypeof = %d, ad = %p, func = %p, fdthis = %p\n",
// sc->intypeof, sc->getStructClassScope(), func, fdthis);
e->error("need 'this' for '%s' of type '%s'", ve->var->toChars(), ve->var->type->toChars());
e = new ErrorExp();
}
}
return e;
}
/***************************************
* Pull out any properties.
*/
Expression *resolvePropertiesX(Scope *sc, Expression *e1, Expression *e2 = NULL)
{
Loc loc = e1->loc;
OverloadSet *os;
Dsymbol *s;
Objects *tiargs;
Type *tthis;
if (e1->op == TOKdotexp)
{
DotExp *de = (DotExp *)e1;
if (de->e2->op == TOKoverloadset)
{
tiargs = NULL;
tthis = de->e1->type;
os = ((OverExp *)de->e2)->vars;
goto Los;
}
}
else if (e1->op == TOKoverloadset)
{
tiargs = NULL;
tthis = NULL;
os = ((OverExp *)e1)->vars;
Los:
assert(os);
FuncDeclaration *fd = NULL;
if (e2)
{
e2 = e2->semantic(sc);
if (e2->op == TOKerror)
return new ErrorExp();
e2 = resolveProperties(sc, e2);
Expressions a;
a.push(e2);
for (size_t i = 0; i < os->a.dim; i++)
{
Dsymbol *s = os->a[i];
FuncDeclaration *f = resolveFuncCall(loc, sc, s, tiargs, tthis, &a, 1);
if (f)
{
fd = f;
assert(fd->type->ty == Tfunction);
TypeFunction *tf = (TypeFunction *)fd->type;
if (!tf->isproperty && global.params.enforcePropertySyntax)
goto Leprop;
}
}
if (fd)
{
Expression *e = new CallExp(loc, e1, e2);
return e->semantic(sc);
}
}
{
for (size_t i = 0; i < os->a.dim; i++)
{
Dsymbol *s = os->a[i];
FuncDeclaration *f = resolveFuncCall(loc, sc, s, tiargs, tthis, NULL, 1);
if (f)
{
fd = f;
assert(fd->type->ty == Tfunction);
TypeFunction *tf = (TypeFunction *)fd->type;
if (!tf->isref && e2)
goto Leproplvalue;
if (!tf->isproperty && global.params.enforcePropertySyntax)
goto Leprop;
}
}
if (fd)
{
Expression *e = new CallExp(loc, e1);
if (e2)
e = new AssignExp(loc, e, e2);
return e->semantic(sc);
}
}
if (e2)
goto Leprop;
}
else if (e1->op == TOKdotti)
{
DotTemplateInstanceExp* dti = (DotTemplateInstanceExp *)e1;
s = dti->getTempdecl(sc);
dti->ti->semanticTiargs(sc);
tiargs = dti->ti->tiargs;
tthis = dti->e1->type;
goto Lfd;
}
else if (e1->op == TOKdottd)
{
DotTemplateExp *dte = (DotTemplateExp *)e1;
s = dte->td;
tiargs = NULL;
tthis = dte->e1->type;
goto Lfd;
}
else if (e1->op == TOKimport)
{
s = ((ScopeExp *)e1)->sds;
if (s->isTemplateDeclaration())
{
tiargs = NULL;
tthis = NULL;
goto Lfd;
}
TemplateInstance *ti = s->isTemplateInstance();
if (ti && !ti->semanticRun)
{
//assert(ti->needsTypeInference(sc));
s = ti->tempdecl;
ti->semanticTiargs(sc);
tiargs = ti->tiargs;
tthis = NULL;
goto Lfd;
}
}
else if (e1->op == TOKtemplate)
{
s = ((TemplateExp *)e1)->td;
tiargs = NULL;
tthis = NULL;
goto Lfd;
}
else if (e1->op == TOKdotvar && e1->type->toBasetype()->ty == Tfunction)
{
DotVarExp *dve = (DotVarExp *)e1;
s = dve->var->isFuncDeclaration();
tiargs = NULL;
tthis = dve->e1->type;
goto Lfd;
}
else if (e1->op == TOKvar && e1->type->toBasetype()->ty == Tfunction)
{
s = ((VarExp *)e1)->var->isFuncDeclaration();
tiargs = NULL;
tthis = NULL;
Lfd:
assert(s);
FuncDeclaration *fd;
if (e2)
{
e2 = e2->semantic(sc);
if (e2->op == TOKerror)
return new ErrorExp();
e2 = resolveProperties(sc, e2);
Expressions a;
a.push(e2);
fd = resolveFuncCall(loc, sc, s, tiargs, tthis, &a, 1);
if (fd && fd->type)
{
assert(fd->type->ty == Tfunction);
TypeFunction *tf = (TypeFunction *)fd->type;
if (!tf->isproperty && global.params.enforcePropertySyntax)
goto Leprop;
Expression *e = new CallExp(loc, e1, e2);
return e->semantic(sc);
}
}
{
fd = resolveFuncCall(loc, sc, s, tiargs, tthis, NULL, 1);
if (fd && fd->type)
{
assert(fd->type->ty == Tfunction);
TypeFunction *tf = (TypeFunction *)fd->type;
if (!tf->isref && e2)
goto Leproplvalue;
if (!tf->isproperty && global.params.enforcePropertySyntax)
goto Leprop;
Expression *e = new CallExp(loc, e1);
if (e2)
e = new AssignExp(loc, e, e2);
return e->semantic(sc);
}
}
if (FuncDeclaration *fd = s->isFuncDeclaration())
{ // Keep better diagnostic message for invalid property usage of functions
assert(fd->type->ty == Tfunction);
TypeFunction *tf = (TypeFunction *)fd->type;
if (!tf->isproperty && global.params.enforcePropertySyntax)
error(loc, "not a property %s", e1->toChars());
Expression *e = new CallExp(loc, e1, e2);
return e->semantic(sc);
}
if (e2)
goto Leprop;
}
if (e2)
return NULL;
if (e1->type &&
e1->op != TOKtype) // function type is not a property
{
/* Look for e1 being a lazy parameter; rewrite as delegate call
*/
if (e1->op == TOKvar)
{
VarExp *ve = (VarExp *)e1;
if (ve->var->storage_class & STClazy)
{
Expression *e = new CallExp(loc, e1);
return e->semantic(sc);
}
}
else if (e1->op == TOKdotexp)
{
e1->error("expression has no value");
return new ErrorExp();
}
}
return_expr:
if (!e1->type)
{
error(loc, "cannot resolve type for %s", e1->toChars());
e1->type = new TypeError();
}
return e1;
Leprop:
error(loc, "not a property %s", e1->toChars());
return new ErrorExp();
Leproplvalue:
error(loc, "%s is not an lvalue", e1->toChars());
return new ErrorExp();
}
Expression *resolveProperties(Scope *sc, Expression *e)
{
//printf("resolveProperties(%s)\n", e->toChars());
e = resolvePropertiesX(sc, e);
e = checkRightThis(sc, e);
return e;
}
/******************************
* Check the tail CallExp is really property function call.
*/
void checkPropertyCall(Expression *e, Expression *emsg)
{
while (e->op == TOKcomma)
e = ((CommaExp *)e)->e2;
if (e->op == TOKcall)
{ CallExp *ce = (CallExp *)e;
TypeFunction *tf;
if (ce->f)
{
tf = (TypeFunction *)ce->f->type;
/* If a forward reference to ce->f, try to resolve it
*/
if (!tf->deco && ce->f->scope)
{ ce->f->semantic(ce->f->scope);
tf = (TypeFunction *)ce->f->type;
}
}
else if (ce->e1->type->ty == Tfunction)
tf = (TypeFunction *)ce->e1->type;
else if (ce->e1->type->ty == Tdelegate)
tf = (TypeFunction *)ce->e1->type->nextOf();
else if (ce->e1->type->ty == Tpointer && ce->e1->type->nextOf()->ty == Tfunction)
tf = (TypeFunction *)ce->e1->type->nextOf();
else
assert(0);
if (!tf->isproperty && global.params.enforcePropertySyntax)
ce->e1->error("not a property %s", emsg->toChars());
}
}
/******************************
* Find symbol in accordance with the UFCS name look up rule
*/
Expression *searchUFCS(Scope *sc, UnaExp *ue, Identifier *ident)
{
Loc loc = ue->loc;
Dsymbol *s = NULL;
for (Scope *scx = sc; scx; scx = scx->enclosing)
{
if (!scx->scopesym)
continue;
s = scx->scopesym->search(loc, ident, 0);
if (s)
{
// overload set contains only module scope symbols.
if (s->isOverloadSet())
break;
// selective/renamed imports also be picked up
if (AliasDeclaration *ad = s->isAliasDeclaration())
{
if (ad->import)
break;
}
// See only module scope symbols for UFCS target.
Dsymbol *p = s->toParent2();
if (p && p->isModule())
break;
}
s = NULL;
}
if (!s)
return ue->e1->type->Type::getProperty(loc, ident, 0);
FuncDeclaration *f = s->isFuncDeclaration();
if (f)
{ TemplateDeclaration *tempdecl = getFuncTemplateDecl(f);
if (tempdecl)
{
if (tempdecl->overroot)
tempdecl = tempdecl->overroot;
s = tempdecl;
}
}
if (ue->op == TOKdotti)
{
Dsymbol *sx = s->toAlias();
TemplateDeclaration *td = sx->isTemplateDeclaration();
if (!td)
{ if (FuncDeclaration *fd = sx->isFuncDeclaration())
td = fd->findTemplateDeclRoot();
}
if (!td)
{ s->error(loc, "is not a template");
return new ErrorExp();
}
DotTemplateInstanceExp *dti = (DotTemplateInstanceExp *)ue;
if (!dti->ti->semanticTiargs(sc))
return new ErrorExp();
return new ScopeExp(loc, new TemplateInstance(loc, td, dti->ti->tiargs));
}
else
{
return new DsymbolExp(loc, s, 1);
}
}
/******************************
* Pull out callable entity with UFCS.
*/
Expression *resolveUFCS(Scope *sc, CallExp *ce)
{
Loc loc = ce->loc;
Expression *eleft;
Expression *e;
if (ce->e1->op == TOKdot)
{
DotIdExp *die = (DotIdExp *)ce->e1;
Identifier *ident = die->ident;
Expression *ex = die->semanticX(sc);
if (ex != die)
{ ce->e1 = ex;
return NULL;
}
eleft = die->e1;
Type *t = eleft->type->toBasetype();
if (t->ty == Tarray || t->ty == Tsarray ||
t->ty == Tnull || (t->isTypeBasic() && t->ty != Tvoid))
{
/* Built-in types and arrays have no callable properties, so do shortcut.
* It is necessary in: e.init()
*/
}
else if (t->ty == Taarray)
{
if (ident == Id::remove)
{
/* Transform:
* aa.remove(arg) into delete aa[arg]
*/
if (!ce->arguments || ce->arguments->dim != 1)
{ ce->error("expected key as argument to aa.remove()");
return new ErrorExp();
}
if (!eleft->type->isMutable())
{ ce->error("cannot remove key from %s associative array %s",
MODtoChars(t->mod), eleft->toChars());
return new ErrorExp();
}
Expression *key = (*ce->arguments)[0];
key = key->semantic(sc);
key = resolveProperties(sc, key);
TypeAArray *taa = (TypeAArray *)t;
key = key->implicitCastTo(sc, taa->index);
if (!key->rvalue())
return new ErrorExp();
return new RemoveExp(loc, eleft, key);
}
else if (ident == Id::apply || ident == Id::applyReverse)
{
return NULL;
}
else
{ TypeAArray *taa = (TypeAArray *)t;
assert(taa->ty == Taarray);
StructDeclaration *sd = taa->getImpl();
Dsymbol *s = sd->search(Loc(), ident, 2);
if (s)
return NULL;
}
}
else
{
if (Expression *ey = die->semanticY(sc, 1))
{ ce->e1 = ey;
return NULL;
}
}
e = searchUFCS(sc, die, ident);
}
else if (ce->e1->op == TOKdotti)
{
DotTemplateInstanceExp *dti = (DotTemplateInstanceExp *)ce->e1;
if (Expression *ey = dti->semanticY(sc, 1))
{ ce->e1 = ey;
return NULL;
}
eleft = dti->e1;
e = searchUFCS(sc, dti, dti->ti->name);
}
else
return NULL;
// Rewrite
ce->e1 = e;
if (!ce->arguments)
ce->arguments = new Expressions();
ce->arguments->shift(eleft);
return NULL;
}
/******************************
* Pull out property with UFCS.
*/
Expression *resolveUFCSProperties(Scope *sc, Expression *e1, Expression *e2 = NULL)
{
Loc loc = e1->loc;
Expression *eleft;
Expression *e;
if (e1->op == TOKdot)
{
DotIdExp *die = (DotIdExp *)e1;
eleft = die->e1;
e = searchUFCS(sc, die, die->ident);
}
else if (e1->op == TOKdotti)
{
DotTemplateInstanceExp *dti;
dti = (DotTemplateInstanceExp *)e1;
eleft = dti->e1;
e = searchUFCS(sc, dti, dti->ti->name);
}
else
return NULL;
// Rewrite
if (e2)
{
// run semantic without gagging
e2 = e2->semantic(sc);
/* f(e1) = e2
*/
Expression *ex = e->copy();
Expressions *a1 = new Expressions();
a1->setDim(1);
(*a1)[0] = eleft;
ex = new CallExp(loc, ex, a1);
ex = ex->trySemantic(sc);
/* f(e1, e2)
*/
Expressions *a2 = new Expressions();
a2->setDim(2);
(*a2)[0] = eleft;
(*a2)[1] = e2;
e = new CallExp(loc, e, a2);
if (ex)
{ // if fallback setter exists, gag errors
e = e->trySemantic(sc);
if (!e)
{ checkPropertyCall(ex, e1);
ex = new AssignExp(loc, ex, e2);
return ex->semantic(sc);
}
}
else
{ // strict setter prints errors if fails
e = e->semantic(sc);
}
checkPropertyCall(e, e1);
return e;
}
else
{
/* f(e1)
*/
Expressions *arguments = new Expressions();
arguments->setDim(1);
(*arguments)[0] = eleft;
e = new CallExp(loc, e, arguments);
e = e->semantic(sc);
checkPropertyCall(e, e1);
return e->semantic(sc);
}
}
/******************************
* Perform semantic() on an array of Expressions.
*/
Expressions *arrayExpressionSemantic(Expressions *exps, Scope *sc)
{
if (exps)
{
for (size_t i = 0; i < exps->dim; i++)
{ Expression *e = (*exps)[i];
if (e)
{ e = e->semantic(sc);
(*exps)[i] = e;
}
}
}
return exps;
}
/******************************
* Perform canThrow() on an array of Expressions.
*/
#if DMDV2
int arrayExpressionCanThrow(Expressions *exps, bool mustNotThrow)
{
if (exps)
{
for (size_t i = 0; i < exps->dim; i++)
{ Expression *e = (*exps)[i];
if (e && e->canThrow(mustNotThrow))
return 1;
}
}
return 0;
}
#endif
/****************************************
* Expand tuples.
*/
void expandTuples(Expressions *exps)
{
//printf("expandTuples()\n");
if (exps)
{
for (size_t i = 0; i < exps->dim; i++)
{ Expression *arg = (*exps)[i];
if (!arg)
continue;
// Look for tuple with 0 members
if (arg->op == TOKtype)
{ TypeExp *e = (TypeExp *)arg;
if (e->type->toBasetype()->ty == Ttuple)
{ TypeTuple *tt = (TypeTuple *)e->type->toBasetype();
if (!tt->arguments || tt->arguments->dim == 0)
{
exps->remove(i);
if (i == exps->dim)
return;
i--;
continue;
}
}
}
// Inline expand all the tuples
while (arg->op == TOKtuple)
{
TupleExp *te = (TupleExp *)arg;
exps->remove(i); // remove arg
exps->insert(i, te->exps); // replace with tuple contents
if (i == exps->dim)
return; // empty tuple, no more arguments
(*exps)[i] = Expression::combine(te->e0, (*exps)[i]);
arg = (*exps)[i];
}
}
}
}
/****************************************
* Expand alias this tuples.
*/
TupleDeclaration *isAliasThisTuple(Expression *e)
{
if (e->type)
{
Type *t = e->type->toBasetype();
AggregateDeclaration *ad;
if (t->ty == Tstruct)
{
ad = ((TypeStruct *)t)->sym;
goto L1;
}
else if (t->ty == Tclass)
{
ad = ((TypeClass *)t)->sym;
L1:
Dsymbol *s = ad->aliasthis;
if (s && s->isVarDeclaration())
{
TupleDeclaration *td = s->isVarDeclaration()->toAlias()->isTupleDeclaration();
if (td && td->isexp)
return td;
}
}
}
return NULL;
}
int expandAliasThisTuples(Expressions *exps, size_t starti)
{
if (!exps || exps->dim == 0)
return -1;
for (size_t u = starti; u < exps->dim; u++)
{
Expression *exp = (*exps)[u];
TupleDeclaration *td = isAliasThisTuple(exp);
if (td)
{
exps->remove(u);
for (size_t i = 0; i<td->objects->dim; ++i)
{
Expression *e = isExpression((*td->objects)[i]);
assert(e);
assert(e->op == TOKdsymbol);
DsymbolExp *se = (DsymbolExp *)e;
Declaration *d = se->s->isDeclaration();
assert(d);
e = new DotVarExp(exp->loc, exp, d);
assert(d->type);
e->type = d->type;
exps->insert(u + i, e);
}
#if 0
printf("expansion ->\n");
for (size_t i = 0; i<exps->dim; ++i)
{
Expression *e = (*exps)[i];
printf("\texps[%d] e = %s %s\n", i, Token::tochars[e->op], e->toChars());
}
#endif
return (int)u;
}
}
return -1;
}
Expressions *arrayExpressionToCommonType(Scope *sc, Expressions *exps, Type **pt)
{
#if DMDV1
/* The first element sets the type
*/
Type *t0 = NULL;
for (size_t i = 0; i < exps->dim; i++)
{ Expression *e = (*exps)[i];
if (!e->type)
{ error("%s has no value", e->toChars());
e = new ErrorExp();
}
e = resolveProperties(sc, e);
if (!t0)
t0 = e->type;
else
e = e->implicitCastTo(sc, t0);
(*exps)[i] = e;
}
if (!t0)
t0 = Type::tvoid;
if (pt)
*pt = t0;
// Eventually, we want to make this copy-on-write
return exps;
#endif
#if DMDV2
/* The type is determined by applying ?: to each pair.
*/
/* Still have a problem with:
* ubyte[][] = [ cast(ubyte[])"hello", [1]];
* which works if the array literal is initialized top down with the ubyte[][]
* type, but fails with this function doing bottom up typing.
*/
//printf("arrayExpressionToCommonType()\n");
IntegerExp integerexp(0);
CondExp condexp(Loc(), &integerexp, NULL, NULL);
Type *t0 = NULL;
Expression *e0;
size_t j0;
for (size_t i = 0; i < exps->dim; i++)
{
Expression *e = (*exps)[i];
e = resolveProperties(sc, e);