/* Returns:
* 0 this member doesn't need further processing to determine struct size
* 1 this member does
*/
static int func(Dsymbol *s, void *param)
{ SV *psv = (SV *)param;
VarDeclaration *v = s->isVarDeclaration();
if (v)
{
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;
}
Expression *fromConstInitializer(Expression *e1)
{
//printf("fromConstInitializer(%s)\n", e1->toChars());
if (e1->op == TOKvar)
{ VarExp *ve = (VarExp *)e1;
VarDeclaration *v = ve->var->isVarDeclaration();
if (v && !v->originalType && v->scope) // semantic() not yet run
v->semantic (v->scope);
if (v && v->isConst() && v->init)
{ Expression *ei = v->init->toExpression();
if (ei && ei->type)
e1 = ei;
}
}
return e1;
}
/* 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;
}
Expression *createTypeInfoArray(Scope *sc, Expression *exps[], size_t dim)
{
#if 1
/*
* Pass a reference to the TypeInfo_Tuple corresponding to the types of the
* arguments. Source compatibility is maintained by computing _arguments[]
* at the start of the called function by offseting into the TypeInfo_Tuple
* reference.
*/
Parameters *args = new Parameters;
args->setDim(dim);
for (size_t i = 0; i < dim; i++)
{ Parameter *arg = new Parameter(STCin, exps[i]->type, NULL, NULL);
(*args)[i] = arg;
}
TypeTuple *tup = new TypeTuple(args);
Expression *e = tup->getTypeInfo(sc);
e = e->optimize(WANTvalue);
assert(e->op == TOKsymoff); // should be SymOffExp
return e;
#else
/* Improvements:
* 1) create an array literal instead,
* as it would eliminate the extra dereference of loading the
* static variable.
*/
ArrayInitializer *ai = new ArrayInitializer(0);
VarDeclaration *v;
Type *t;
Expression *e;
OutBuffer buf;
Identifier *id;
char *name;
// Generate identifier for _arguments[]
buf.writestring("_arguments_");
for (int i = 0; i < dim; i++)
{ t = exps[i]->type;
t->toDecoBuffer(&buf);
}
buf.writeByte(0);
id = Lexer::idPool((char *)buf.data);
Module *m = sc->module;
Dsymbol *s = m->symtab->lookup(id);
if (s && s->parent == m)
{ // Use existing one
v = s->isVarDeclaration();
assert(v);
}
else
{ // Generate new one
for (int i = 0; i < dim; i++)
{ t = exps[i]->type;
e = t->getTypeInfo(sc);
ai->addInit(new IntegerExp(i), new ExpInitializer(Loc(), e));
}
t = Type::typeinfo->type->arrayOf();
ai->type = t;
v = new VarDeclaration(0, t, id, ai);
m->members->push(v);
m->symtabInsert(v);
sc = sc->push();
sc->linkage = LINKc;
sc->stc = STCstatic | STCcomdat;
ai->semantic(sc, t);
v->semantic(sc);
v->parent = m;
sc = sc->pop();
}
e = new VarExp(Loc(), v);
e = e->semantic(sc);
return e;
#endif
}
Expression *createTypeInfoArray(Scope *sc, Expression *exps[], int dim)
{
#if 1
/* Get the corresponding TypeInfo_Tuple and
* point at its elements[].
*/
/* Create the TypeTuple corresponding to the types of args[]
*/
Parameters *args = new Parameters;
args->setDim(dim);
for (size_t i = 0; i < dim; i++)
{ Parameter *arg = new Parameter(STCin, exps[i]->type, NULL, NULL);
args->tdata()[i] = arg;
}
TypeTuple *tup = new TypeTuple(args);
Expression *e = tup->getTypeInfo(sc);
e = e->optimize(WANTvalue);
assert(e->op == TOKsymoff); // should be SymOffExp
#if BREAKABI
/*
* Should just pass a reference to TypeInfo_Tuple instead,
* but that would require existing code to be recompiled.
* Source compatibility can be maintained by computing _arguments[]
* at the start of the called function by offseting into the
* TypeInfo_Tuple reference.
*/
#else
// Advance to elements[] member of TypeInfo_Tuple
SymOffExp *se = (SymOffExp *)e;
se->offset += PTRSIZE + PTRSIZE;
// Set type to TypeInfo[]*
se->type = Type::typeinfo->type->arrayOf()->pointerTo();
// Indirect to get the _arguments[] value
e = new PtrExp(0, se);
e->type = se->type->next;
#endif
return e;
#else
/* Improvements:
* 1) create an array literal instead,
* as it would eliminate the extra dereference of loading the
* static variable.
*/
ArrayInitializer *ai = new ArrayInitializer(0);
VarDeclaration *v;
Type *t;
Expression *e;
OutBuffer buf;
Identifier *id;
char *name;
// Generate identifier for _arguments[]
buf.writestring("_arguments_");
for (int i = 0; i < dim; i++)
{ t = exps[i]->type;
t->toDecoBuffer(&buf);
}
buf.writeByte(0);
id = Lexer::idPool((char *)buf.data);
Module *m = sc->module;
Dsymbol *s = m->symtab->lookup(id);
if (s && s->parent == m)
{ // Use existing one
v = s->isVarDeclaration();
assert(v);
}
else
{ // Generate new one
for (int i = 0; i < dim; i++)
{ t = exps[i]->type;
e = t->getTypeInfo(sc);
ai->addInit(new IntegerExp(i), new ExpInitializer(0, e));
}
t = Type::typeinfo->type->arrayOf();
ai->type = t;
v = new VarDeclaration(0, t, id, ai);
m->members->push(v);
m->symtabInsert(v);
sc = sc->push();
sc->linkage = LINKc;
sc->stc = STCstatic | STCcomdat;
ai->semantic(sc, t);
v->semantic(sc);
v->parent = m;
sc = sc->pop();
}
e = new VarExp(0, v);
e = e->semantic(sc);
return e;
#endif
}
void VarDeclaration::semantic(Scope *sc)
{
#if 0
printf("VarDeclaration::semantic('%s', parent = '%s')\n", toChars(), sc->parent->toChars());
printf(" type = %s\n", type ? type->toChars() : "null");
printf(" stc = x%x\n", sc->stc);
printf(" storage_class = x%x\n", storage_class);
printf("linkage = %d\n", sc->linkage);
//if (strcmp(toChars(), "mul") == 0) halt();
#endif
storage_class |= sc->stc;
if (storage_class & STCextern && init)
error("extern symbols cannot have initializers");
AggregateDeclaration *ad = isThis();
if (ad)
storage_class |= ad->storage_class & STC_TYPECTOR;
/* If auto type inference, do the inference
*/
int inferred = 0;
if (!type)
{ inuse++;
type = init->inferType(sc);
inuse--;
inferred = 1;
/* This is a kludge to support the existing syntax for RAII
* declarations.
*/
storage_class &= ~STCauto;
originalType = type;
}
else
{ if (!originalType)
originalType = type;
type = type->semantic(loc, sc);
}
//printf(" semantic type = %s\n", type ? type->toChars() : "null");
type->checkDeprecated(loc, sc);
linkage = sc->linkage;
this->parent = sc->parent;
//printf("this = %p, parent = %p, '%s'\n", this, parent, parent->toChars());
protection = sc->protection;
//printf("sc->stc = %x\n", sc->stc);
//printf("storage_class = x%x\n", storage_class);
#if DMDV2
if (storage_class & STCgshared && global.params.safe && !sc->module->safe)
{
error("__gshared not allowed in safe mode; use shared");
}
#endif
Dsymbol *parent = toParent();
FuncDeclaration *fd = parent->isFuncDeclaration();
Type *tb = type->toBasetype();
if (tb->ty == Tvoid && !(storage_class & STClazy))
{ error("voids have no value");
type = Type::terror;
tb = type;
}
if (tb->ty == Tfunction)
{ error("cannot be declared to be a function");
type = Type::terror;
tb = type;
}
if (tb->ty == Tstruct)
{ TypeStruct *ts = (TypeStruct *)tb;
if (!ts->sym->members)
{
error("no definition of struct %s", ts->toChars());
}
}
if ((storage_class & STCauto) && !inferred)
error("storage class 'auto' has no effect if type is not inferred, did you mean 'scope'?");
if (tb->ty == Ttuple)
{ /* Instead, declare variables for each of the tuple elements
* and add those.
*/
TypeTuple *tt = (TypeTuple *)tb;
size_t nelems = Parameter::dim(tt->arguments);
Objects *exps = new Objects();
exps->setDim(nelems);
Expression *ie = init ? init->toExpression() : NULL;
for (size_t i = 0; i < nelems; i++)
{ Parameter *arg = Parameter::getNth(tt->arguments, i);
OutBuffer buf;
buf.printf("_%s_field_%zu", ident->toChars(), i);
buf.writeByte(0);
const char *name = (const char *)buf.extractData();
Identifier *id = Lexer::idPool(name);
Expression *einit = ie;
if (ie && ie->op == TOKtuple)
{ einit = (Expression *)((TupleExp *)ie)->exps->data[i];
}
Initializer *ti = init;
if (einit)
{ ti = new ExpInitializer(einit->loc, einit);
}
VarDeclaration *v = new VarDeclaration(loc, arg->type, id, ti);
//printf("declaring field %s of type %s\n", v->toChars(), v->type->toChars());
v->semantic(sc);
#if !IN_LLVM
// removed for LDC since TupleDeclaration::toObj already creates the fields;
// adding them to the scope again leads to duplicates
if (sc->scopesym)
{ //printf("adding %s to %s\n", v->toChars(), sc->scopesym->toChars());
if (sc->scopesym->members)
sc->scopesym->members->push(v);
}
#endif
Expression *e = new DsymbolExp(loc, v);
exps->data[i] = e;
}
TupleDeclaration *v2 = new TupleDeclaration(loc, ident, exps);
v2->isexp = 1;
aliassym = v2;
return;
}
if (storage_class & STCconst && !init && !fd)
// Initialize by constructor only
storage_class = (storage_class & ~STCconst) | STCctorinit;
if (isConst())
{
}
else if (isStatic())
{
}
else if (isSynchronized())
{
error("variable %s cannot be synchronized", toChars());
}
else if (isOverride())
{
error("override cannot be applied to variable");
}
else if (isAbstract())
{
error("abstract cannot be applied to variable");
}
else if (storage_class & STCtemplateparameter)
{
}
else if (storage_class & STCctfe)
{
}
else
{
AggregateDeclaration *aad = sc->anonAgg;
if (!aad)
aad = parent->isAggregateDeclaration();
if (aad)
{
#if DMDV2
assert(!(storage_class & (STCextern | STCstatic | STCtls | STCgshared)));
if (storage_class & (STCconst | STCimmutable) && init)
{
if (!type->toBasetype()->isTypeBasic())
storage_class |= STCstatic;
}
else
#endif
aad->addField(sc, this);
}
InterfaceDeclaration *id = parent->isInterfaceDeclaration();
if (id)
{
error("field not allowed in interface");
}
/* Templates cannot add fields to aggregates
*/
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
AggregateDeclaration *ad = ti->tempdecl->isMember();
if (ad && storage_class != STCundefined)
{
error("cannot use template to add field to aggregate '%s'", ad->toChars());
}
}
}
#if DMDV2
if ((storage_class & (STCref | STCparameter | STCforeach)) == STCref &&
ident != Id::This)
{
error("only parameters or foreach declarations can be ref");
}
#endif
if (type->isscope() && !noscope)
{
if (storage_class & (STCfield | STCout | STCref | STCstatic) || !fd)
{
error("globals, statics, fields, ref and out parameters cannot be auto");
}
if (!(storage_class & STCscope))
{
if (!(storage_class & STCparameter) && ident != Id::withSym)
error("reference to scope class must be scope");
}
}
enum TOK op = TOKconstruct;
if (!init && !sc->inunion && !isStatic() && !isConst() && fd &&
!(storage_class & (STCfield | STCin | STCforeach)) &&
type->size() != 0)
{
// Provide a default initializer
//printf("Providing default initializer for '%s'\n", toChars());
if (type->ty == Tstruct &&
((TypeStruct *)type)->sym->zeroInit == 1)
{ /* If a struct is all zeros, as a special case
* set it's initializer to the integer 0.
* In AssignExp::toElem(), we check for this and issue
* a memset() to initialize the struct.
* Must do same check in interpreter.
*/
Expression *e = new IntegerExp(loc, 0, Type::tint32);
Expression *e1;
e1 = new VarExp(loc, this);
e = new AssignExp(loc, e1, e);
e->op = TOKconstruct;
e->type = e1->type; // don't type check this, it would fail
init = new ExpInitializer(loc, e);
return;
}
else if (type->ty == Ttypedef)
{ TypeTypedef *td = (TypeTypedef *)type;
if (td->sym->init)
{ init = td->sym->init;
ExpInitializer *ie = init->isExpInitializer();
if (ie)
// Make copy so we can modify it
init = new ExpInitializer(ie->loc, ie->exp);
}
else
init = getExpInitializer();
}
else
{
init = getExpInitializer();
}
// Default initializer is always a blit
op = TOKblit;
}
if (init)
{
sc = sc->push();
sc->stc &= ~(STC_TYPECTOR | STCpure | STCnothrow | STCref);
ArrayInitializer *ai = init->isArrayInitializer();
if (ai && tb->ty == Taarray)
{
init = ai->toAssocArrayInitializer();
}
StructInitializer *si = init->isStructInitializer();
ExpInitializer *ei = init->isExpInitializer();
// See if initializer is a NewExp that can be allocated on the stack
if (ei && isScope() && ei->exp->op == TOKnew)
{ NewExp *ne = (NewExp *)ei->exp;
if (!(ne->newargs && ne->newargs->dim))
{ ne->onstack = 1;
onstack = 1;
if (type->isBaseOf(ne->newtype->semantic(loc, sc), NULL))
onstack = 2;
}
}
// If inside function, there is no semantic3() call
if (sc->func)
{
// If local variable, use AssignExp to handle all the various
// possibilities.
if (fd && !isStatic() && !isConst() && !init->isVoidInitializer())
{
//printf("fd = '%s', var = '%s'\n", fd->toChars(), toChars());
if (!ei)
{
Expression *e = init->toExpression();
if (!e)
{
init = init->semantic(sc, type);
e = init->toExpression();
if (!e)
{ error("is not a static and cannot have static initializer");
return;
}
}
ei = new ExpInitializer(init->loc, e);
init = ei;
}
Expression *e1 = new VarExp(loc, this);
Type *t = type->toBasetype();
if (t->ty == Tsarray && !(storage_class & (STCref | STCout)))
{
ei->exp = ei->exp->semantic(sc);
if (!ei->exp->implicitConvTo(type))
{
int dim = ((TypeSArray *)t)->dim->toInteger();
// If multidimensional static array, treat as one large array
while (1)
{
t = t->nextOf()->toBasetype();
if (t->ty != Tsarray)
break;
dim *= ((TypeSArray *)t)->dim->toInteger();
e1->type = new TypeSArray(t->nextOf(), new IntegerExp(0, dim, Type::tindex));
}
}
e1 = new SliceExp(loc, e1, NULL, NULL);
}
else if (t->ty == Tstruct)
{
ei->exp = ei->exp->semantic(sc);
ei->exp = resolveProperties(sc, ei->exp);
StructDeclaration *sd = ((TypeStruct *)t)->sym;
#if DMDV2
/* Look to see if initializer is a call to the constructor
*/
if (sd->ctor && // there are constructors
ei->exp->type->ty == Tstruct && // rvalue is the same struct
((TypeStruct *)ei->exp->type)->sym == sd &&
ei->exp->op == TOKstar)
{
/* Look for form of constructor call which is:
* *__ctmp.ctor(arguments...)
*/
PtrExp *pe = (PtrExp *)ei->exp;
if (pe->e1->op == TOKcall)
{ CallExp *ce = (CallExp *)pe->e1;
if (ce->e1->op == TOKdotvar)
{ DotVarExp *dve = (DotVarExp *)ce->e1;
if (dve->var->isCtorDeclaration())
{ /* It's a constructor call, currently constructing
* a temporary __ctmp.
*/
/* Before calling the constructor, initialize
* variable with a bit copy of the default
* initializer
*/
Expression *e = new AssignExp(loc, new VarExp(loc, this), t->defaultInit(loc));
e->op = TOKblit;
e->type = t;
ei->exp = new CommaExp(loc, e, ei->exp);
/* Replace __ctmp being constructed with e1
*/
dve->e1 = e1;
return;
}
}
}
}
#endif
if (!ei->exp->implicitConvTo(type))
{
/* Look for opCall
* See bugzilla 2702 for more discussion
*/
Type *ti = ei->exp->type->toBasetype();
// Don't cast away invariant or mutability in initializer
if (search_function(sd, Id::call) &&
/* Initializing with the same type is done differently
*/
!(ti->ty == Tstruct && t->toDsymbol(sc) == ti->toDsymbol(sc)))
{ // Rewrite as e1.call(arguments)
Expression * eCall = new DotIdExp(loc, e1, Id::call);
ei->exp = new CallExp(loc, eCall, ei->exp);
}
}
}
ei->exp = new AssignExp(loc, e1, ei->exp);
ei->exp->op = TOKconstruct;
canassign++;
ei->exp = ei->exp->semantic(sc);
canassign--;
ei->exp->optimize(WANTvalue);
}
else
{
init = init->semantic(sc, type);
if (fd && isConst() && !isStatic())
{ // Make it static
storage_class |= STCstatic;
}
}
}
else if (isConst() || isFinal() ||
parent->isAggregateDeclaration())
{
/* Because we may need the results of a const declaration in a
* subsequent type, such as an array dimension, before semantic2()
* gets ordinarily run, try to run semantic2() now.
* Ignore failure.
*/
if (!global.errors && !inferred)
{
unsigned errors = global.errors;
global.gag++;
//printf("+gag\n");
Expression *e;
Initializer *i2 = init;
inuse++;
if (ei)
{
e = ei->exp->syntaxCopy();
e = e->semantic(sc);
e = e->implicitCastTo(sc, type);
}
else if (si || ai)
{ i2 = init->syntaxCopy();
i2 = i2->semantic(sc, type);
}
inuse--;
global.gag--;
//printf("-gag\n");
if (errors != global.errors) // if errors happened
{
if (global.gag == 0)
global.errors = errors; // act as if nothing happened
#if DMDV2
/* Save scope for later use, to try again
*/
scope = new Scope(*sc);
scope->setNoFree();
#endif
}
else if (ei)
{
if (isDataseg() || (storage_class & STCmanifest))
e = e->optimize(WANTvalue | WANTinterpret);
else
e = e->optimize(WANTvalue);
switch (e->op)
{
case TOKint64:
case TOKfloat64:
case TOKstring:
case TOKarrayliteral:
case TOKassocarrayliteral:
case TOKstructliteral:
case TOKnull:
ei->exp = e; // no errors, keep result
break;
default:
#if DMDV2
/* Save scope for later use, to try again
*/
scope = new Scope(*sc);
scope->setNoFree();
#endif
break;
}
}
else
init = i2; // no errors, keep result
}
}
sc = sc->pop();
}
}
Dsymbol *ArrayScopeSymbol::search(Loc loc, Identifier *ident, int flags)
{
//printf("ArrayScopeSymbol::search('%s', flags = %d)\n", ident->toChars(), flags);
if (ident == Id::dollar)
{ VarDeclaration **pvar;
Expression *ce;
L1:
if (td)
{ /* $ gives the number of elements in the tuple
*/
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
Expression *e = new IntegerExp(Loc(), td->objects->dim, Type::tsize_t);
v->init = new ExpInitializer(Loc(), e);
v->storage_class |= STCstatic | STCconst;
v->semantic(sc);
return v;
}
if (type)
{ /* $ gives the number of type entries in the type tuple
*/
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
Expression *e = new IntegerExp(Loc(), type->arguments->dim, Type::tsize_t);
v->init = new ExpInitializer(Loc(), e);
v->storage_class |= STCstatic | STCconst;
v->semantic(sc);
return v;
}
if (exp->op == TOKindex)
{ /* array[index] where index is some function of $
*/
IndexExp *ie = (IndexExp *)exp;
pvar = &ie->lengthVar;
ce = ie->e1;
}
else if (exp->op == TOKslice)
{ /* array[lwr .. upr] where lwr or upr is some function of $
*/
SliceExp *se = (SliceExp *)exp;
pvar = &se->lengthVar;
ce = se->e1;
}
else if (exp->op == TOKarray)
{ /* array[e0, e1, e2, e3] where e0, e1, e2 are some function of $
* $ is a opDollar!(dim)() where dim is the dimension(0,1,2,...)
*/
ArrayExp *ae = (ArrayExp *)exp;
pvar = &ae->lengthVar;
ce = ae->e1;
}
else
/* Didn't find $, look in enclosing scope(s).
*/
return NULL;
while (ce->op == TOKcomma)
ce = ((CommaExp *)ce)->e2;
/* If we are indexing into an array that is really a type
* tuple, rewrite this as an index into a type tuple and
* try again.
*/
if (ce->op == TOKtype)
{
Type *t = ((TypeExp *)ce)->type;
if (t->ty == Ttuple)
{ type = (TypeTuple *)t;
goto L1;
}
}
/* *pvar is lazily initialized, so if we refer to $
* multiple times, it gets set only once.
*/
if (!*pvar) // if not already initialized
{ /* Create variable v and set it to the value of $
*/
VarDeclaration *v;
Type *t;
if (ce->op == TOKtuple)
{ /* It is for an expression tuple, so the
* length will be a const.
*/
Expression *e = new IntegerExp(Loc(), ((TupleExp *)ce)->exps->dim, Type::tsize_t);
v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, new ExpInitializer(Loc(), e));
v->storage_class |= STCstatic | STCconst;
}
else if (ce->type && (t = ce->type->toBasetype()) != NULL &&
(t->ty == Tstruct || t->ty == Tclass))
{ // Look for opDollar
assert(exp->op == TOKarray || exp->op == TOKslice);
AggregateDeclaration *ad = NULL;
if (t->ty == Tclass)
{
ad = ((TypeClass *)t)->sym;
}
else if (t->ty == Tstruct)
{
ad = ((TypeStruct *)t)->sym;
}
assert(ad);
Dsymbol *s = ad->search(loc, Id::opDollar, 0);
if (!s) // no dollar exists -- search in higher scope
return NULL;
s = s->toAlias();
Expression *e = NULL;
// Check for multi-dimensional opDollar(dim) template.
if (TemplateDeclaration *td = s->isTemplateDeclaration())
{
dinteger_t dim;
if (exp->op == TOKarray)
{
dim = ((ArrayExp *)exp)->currentDimension;
}
else if (exp->op == TOKslice)
{
dim = 0; // slices are currently always one-dimensional
}
Objects *tdargs = new Objects();
Expression *edim = new IntegerExp(Loc(), dim, Type::tsize_t);
edim = edim->semantic(sc);
tdargs->push(edim);
//TemplateInstance *ti = new TemplateInstance(loc, td, tdargs);
//ti->semantic(sc);
e = new DotTemplateInstanceExp(loc, ce, td->ident, tdargs);
}
else
{ /* opDollar exists, but it's not a template.
* This is acceptable ONLY for single-dimension indexing.
* Note that it's impossible to have both template & function opDollar,
* because both take no arguments.
*/
if (exp->op == TOKarray && ((ArrayExp *)exp)->arguments->dim != 1)
{
exp->error("%s only defines opDollar for one dimension", ad->toChars());
return NULL;
}
Declaration *d = s->isDeclaration();
assert(d);
e = new DotVarExp(loc, ce, d);
}
e = e->semantic(sc);
if (!e->type)
exp->error("%s has no value", e->toChars());
t = e->type->toBasetype();
if (t && t->ty == Tfunction)
e = new CallExp(e->loc, e);
v = new VarDeclaration(loc, NULL, Id::dollar, new ExpInitializer(Loc(), e));
}
else
{ /* For arrays, $ will either be a compile-time constant
* (in which case its value in set during constant-folding),
* or a variable (in which case an expression is created in
* toir.c).
*/
VoidInitializer *e = new VoidInitializer(Loc());
e->type = Type::tsize_t;
v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, e);
v->storage_class |= STCctfe; // it's never a true static variable
}
*pvar = v;
}
(*pvar)->semantic(sc);
return (*pvar);
}
return NULL;
}
Dsymbol *ArrayScopeSymbol::search(Loc loc, Identifier *ident, int flags)
{
//printf("ArrayScopeSymbol::search('%s', flags = %d)\n", ident->toChars(), flags);
if (ident == Id::length || ident == Id::dollar)
{ VarDeclaration **pvar;
Expression *ce;
L1:
if (td)
{
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
Expression *e = new IntegerExp(0, td->objects->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
v->semantic(sc);
return v;
}
if (type)
{
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
Expression *e = new IntegerExp(0, type->arguments->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
v->semantic(sc);
return v;
}
if (exp->op == TOKindex)
{
IndexExp *ie = (IndexExp *)exp;
pvar = &ie->lengthVar;
ce = ie->e1;
}
else if (exp->op == TOKslice)
{
SliceExp *se = (SliceExp *)exp;
pvar = &se->lengthVar;
ce = se->e1;
}
else
return NULL;
if (ce->op == TOKtype)
{
Type *t = ((TypeExp *)ce)->type;
if (t->ty == Ttuple)
{ type = (TypeTuple *)t;
goto L1;
}
}
if (!*pvar)
{
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
if (ce->op == TOKvar)
{ // if ce is const, get its initializer
ce = fromConstInitializer(WANTvalue | WANTinterpret, ce);
}
if (ce->op == TOKstring)
{ /* It is for a string literal, so the
* length will be a const.
*/
Expression *e = new IntegerExp(0, ((StringExp *)ce)->len, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
}
else if (ce->op == TOKarrayliteral)
{ /* It is for an array literal, so the
* length will be a const.
*/
Expression *e = new IntegerExp(0, ((ArrayLiteralExp *)ce)->elements->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
}
else if (ce->op == TOKtuple)
{ /* It is for an expression tuple, so the
* length will be a const.
*/
Expression *e = new IntegerExp(0, ((TupleExp *)ce)->exps->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
}
*pvar = v;
}
(*pvar)->semantic(sc);
return (*pvar);
}
return NULL;
}
Dsymbol *ArrayScopeSymbol::search(Loc loc, Identifier *ident, int flags)
{
//printf("ArrayScopeSymbol::search('%s', flags = %d)\n", ident->toChars(), flags);
if (ident == Id::length || ident == Id::dollar)
{ VarDeclaration **pvar;
Expression *ce;
if (ident == Id::length && !global.params.useDeprecated)
error("using 'length' inside [ ] is deprecated, use '$' instead");
L1:
if (td)
{ /* $ gives the number of elements in the tuple
*/
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
Expression *e = new IntegerExp(0, td->objects->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
v->semantic(sc);
return v;
}
if (type)
{ /* $ gives the number of type entries in the type tuple
*/
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
Expression *e = new IntegerExp(0, type->arguments->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
v->semantic(sc);
return v;
}
if (exp->op == TOKindex)
{ /* array[index] where index is some function of $
*/
IndexExp *ie = (IndexExp *)exp;
pvar = &ie->lengthVar;
ce = ie->e1;
}
else if (exp->op == TOKslice)
{ /* array[lwr .. upr] where lwr or upr is some function of $
*/
SliceExp *se = (SliceExp *)exp;
pvar = &se->lengthVar;
ce = se->e1;
}
else if (exp->op == TOKarray)
{ /* array[e0, e1, e2, e3] where e0, e1, e2 are some function of $
* $ is a opDollar!(dim)() where dim is the dimension(0,1,2,...)
*/
ArrayExp *ae = (ArrayExp *)exp;
AggregateDeclaration *ad = NULL;
Type *t = ae->e1->type->toBasetype();
if (t->ty == Tclass)
{
ad = ((TypeClass *)t)->sym;
}
else if (t->ty == Tstruct)
{
ad = ((TypeStruct *)t)->sym;
}
assert(ad);
Dsymbol *dsym = search_function(ad, Id::opDollar);
if (!dsym) // no dollar exists -- search in higher scope
return NULL;
VarDeclaration *v = ae->lengthVar;
if (!v)
{ // $ is lazily initialized. Create it now.
TemplateDeclaration *td = dsym->isTemplateDeclaration();
if (td)
{ // Instantiate opDollar!(dim) with the index as a template argument
Objects *tdargs = new Objects();
tdargs->setDim(1);
Expression *x = new IntegerExp(0, ae->currentDimension, Type::tsize_t);
x = x->semantic(sc);
tdargs->data[0] = x;
//TemplateInstance *ti = new TemplateInstance(loc, td, tdargs);
//ti->semantic(sc);
DotTemplateInstanceExp *dte = new DotTemplateInstanceExp(loc, ae->e1, td->ident, tdargs);
v = new VarDeclaration(loc, NULL, Id::dollar, new ExpInitializer(0, dte));
}
else
{ /* opDollar exists, but it's a function, not a template.
* This is acceptable ONLY for single-dimension indexing.
* Note that it's impossible to have both template & function opDollar,
* because both take no arguments.
*/
if (ae->arguments->dim != 1) {
ae->error("%s only defines opDollar for one dimension", ad->toChars());
return NULL;
}
FuncDeclaration *fd = dsym->isFuncDeclaration();
assert(fd);
Expression * x = new DotVarExp(loc, ae->e1, fd);
v = new VarDeclaration(loc, NULL, Id::dollar, new ExpInitializer(0, x));
}
v->semantic(sc);
ae->lengthVar = v;
}
return v;
}
else
/* Didn't find $, look in enclosing scope(s).
*/
return NULL;
/* If we are indexing into an array that is really a type
* tuple, rewrite this as an index into a type tuple and
* try again.
*/
if (ce->op == TOKtype)
{
Type *t = ((TypeExp *)ce)->type;
if (t->ty == Ttuple)
{ type = (TypeTuple *)t;
goto L1;
}
}
/* *pvar is lazily initialized, so if we refer to $
* multiple times, it gets set only once.
*/
if (!*pvar) // if not already initialized
{ /* Create variable v and set it to the value of $
*/
VarDeclaration *v = new VarDeclaration(loc, Type::tsize_t, Id::dollar, NULL);
if (ce->op == TOKtuple)
{ /* It is for an expression tuple, so the
* length will be a const.
*/
Expression *e = new IntegerExp(0, ((TupleExp *)ce)->exps->dim, Type::tsize_t);
v->init = new ExpInitializer(0, e);
v->storage_class |= STCstatic | STCconst;
}
else
{ /* For arrays, $ will either be a compile-time constant
* (in which case its value in set during constant-folding),
* or a variable (in which case an expression is created in
* toir.c).
*/
VoidInitializer *e = new VoidInitializer(0);
e->type = Type::tsize_t;
v->init = e;
v->storage_class |= STCctfe; // it's never a true static variable
}
*pvar = v;
}
(*pvar)->semantic(sc);
return (*pvar);
}
return NULL;
}
