void QEnginioCollectionObjectPrivate::QmlCallbackFunctor::operator ()(QEnginioOperationObject *aOperation)
{
using namespace QV4;
if (!aOperation)
return;
if (iCallback.isCallable()) {
QJSValuePrivate *prv=QJSValuePrivate::get(iCallback);
FunctionObject *f =prv->value.asFunctionObject();
if (f) {
ExecutionEngine *engine = prv->engine;
Q_ASSERT(engine);
Scope scope(engine);
ScopedCallData callData(scope, 1); // args.length());
callData->thisObject = engine->globalObject->asReturnedValue();
ScopedValue result(scope);
QV4::ExecutionContext *ctx = engine->currentContext();
callData->args[0] = QObjectWrapper::wrap(engine,aOperation);
result = f->call(callData);
if (scope.hasException()) {
result = ctx->catchException();
}
QJSValue tmp(new QJSValuePrivate(engine, result));
}
}
delete aOperation;
}
/*!
Creates a new \c{Object} and calls this QJSValue as a
constructor, using the created object as the `this' object and
passing \a args as arguments. If the return value from the
constructor call is an object, then that object is returned;
otherwise the default constructed object is returned.
If this QJSValue is not a function, callAsConstructor() does
nothing and returns an undefined QJSValue.
Calling this function can cause an exception to occur in the
script engine; in that case, the value that was thrown
(typically an \c{Error} object) is returned. You can call
isError() on the return value to determine whether an
exception occurred.
\sa call(), QJSEngine::newObject()
*/
QJSValue QJSValue::callAsConstructor(const QJSValueList &args)
{
FunctionObject *f = d->value.asFunctionObject();
if (!f)
return QJSValue();
ExecutionEngine *engine = d->engine;
assert(engine);
Scope scope(engine);
ScopedCallData callData(scope, args.size());
for (int i = 0; i < args.size(); ++i) {
if (!args.at(i).d->checkEngine(engine)) {
qWarning("QJSValue::callAsConstructor() failed: cannot construct function with argument created in a different engine");
return QJSValue();
}
callData->args[i] = args.at(i).d->getValue(engine);
}
ScopedValue result(scope);
QV4::ExecutionContext *ctx = engine->currentContext();
result = f->construct(callData);
if (scope.hasException())
result = ctx->catchException();
return new QJSValuePrivate(engine, result);
}
void VariantDB::CallFunctionIfExists( const string &keyName, VariantList *pVList )
{
FunctionObject *pFunc = GetFunctionIfExists(keyName);
if (pFunc)
{
pFunc->sig_function(pVList);
}
}
int main()
{
int x = 3, xSquared, xSquaredAgain;
FunctionObject square;
xSquared = square(x); // Call the function-call operator
xSquaredAgain = square.doSquare(x); // Call the normal method
return 0;
}
void EntityComponent::OnRemove()
{
FunctionObject *pFunc = GetShared()->GetFunctionIfExists("OnDelete");
if (pFunc)
{
//looks like someone wanted notification
VariantList vList(this);
pFunc->m_sig_function(&vList);
}
}
FunctionObject*
Curry::evaluate(Thread& t,
FunctionObject* inObj,
const Function::ArgumentVector& args,
const vector<bool>& mask,
bool dynamicDispatch)
{
//
// Never do partial application on the result of a lambda
// expression (its too difficult to archive). Instead do partial
// evaluation. The good side is that there will never be more
// than one level of indirection in multiple-curried lambda
// expressions. the bad side is that there will be more overhead
// upfront.
//
Process* p = t.process();
const Function* F = inObj->function();
const bool apply = !F->isLambda();
try
{
if (apply)
{
PartialApplicator evaluator(F, p, &t, args, mask, dynamicDispatch);
const FunctionType* rt = evaluator.result()->type();
FunctionObject* outObj = new FunctionObject(rt);
outObj->setDependent(inObj);
outObj->setFunction(evaluator.result());
return outObj;
}
else
{
FunctionSpecializer evaluator(F, p, &t);
evaluator.partiallyEvaluate(args, mask);
const FunctionType* rt = evaluator.result()->type();
FunctionObject* outObj = new FunctionObject(rt);
outObj->setFunction(evaluator.result());
return outObj;
}
}
catch (Exception& e)
{
ProgramException exc(t);
exc.message() = e.message();
exc.message() += " during partial ";
exc.message() += (apply ? "application" : "evaluation");
exc.message() += " of ";
exc.message() += F->name().c_str();
throw exc;
}
}
ReturnedValue Object::getValue(const ValueRef thisObject, const Property *p, PropertyAttributes attrs)
{
if (!attrs.isAccessor())
return p->value.asReturnedValue();
FunctionObject *getter = p->getter();
if (!getter)
return Encode::undefined();
Scope scope(getter->engine());
ScopedCallData callData(scope, 0);
callData->thisObject = *thisObject;
return getter->call(callData);
}
ReturnedValue Script::run()
{
struct ContextStateSaver {
ExecutionContext *savedContext;
bool strictMode;
Lookup *lookups;
CompiledData::CompilationUnit *compilationUnit;
ContextStateSaver(ExecutionContext *context)
: savedContext(context)
, strictMode(context->strictMode)
, lookups(context->lookups)
, compilationUnit(context->compilationUnit)
{}
~ContextStateSaver()
{
savedContext->strictMode = strictMode;
savedContext->lookups = lookups;
savedContext->compilationUnit = compilationUnit;
}
};
if (!parsed)
parse();
if (!vmFunction)
return Encode::undefined();
QV4::ExecutionEngine *engine = scope->engine;
QV4::Scope valueScope(engine);
if (qml.isUndefined()) {
TemporaryAssignment<Function*> savedGlobalCode(engine->globalCode, vmFunction);
ExecutionContextSaver ctxSaver(scope);
ContextStateSaver stateSaver(scope);
scope->strictMode = vmFunction->isStrict();
scope->lookups = vmFunction->compilationUnit->runtimeLookups;
scope->compilationUnit = vmFunction->compilationUnit;
return vmFunction->code(scope, vmFunction->codeData);
} else {
ScopedObject qmlObj(valueScope, qml.value());
FunctionObject *f = new (engine->memoryManager) QmlBindingWrapper(scope, vmFunction, qmlObj);
ScopedCallData callData(valueScope, 0);
callData->thisObject = Primitive::undefinedValue();
return f->call(callData);
}
}
ReturnedValue FunctionPrototype::method_call(CallContext *ctx)
{
Scope scope(ctx);
FunctionObject *o = ctx->callData->thisObject.asFunctionObject();
if (!o)
return ctx->throwTypeError();
ScopedCallData callData(scope, ctx->callData->argc ? ctx->callData->argc - 1 : 0);
if (ctx->callData->argc) {
std::copy(ctx->callData->args + 1,
ctx->callData->args + ctx->callData->argc, callData->args);
}
callData->thisObject = ctx->argument(0);
return o->call(callData);
}
ReturnedValue DatePrototype::method_toJSON(CallContext *ctx)
{
Scope scope(ctx);
ScopedValue O(scope, RuntimeHelpers::toObject(ctx, ValueRef(&ctx->d()->callData->thisObject)));
ScopedValue tv(scope, RuntimeHelpers::toPrimitive(O, NUMBER_HINT));
if (tv->isNumber() && !std::isfinite(tv->toNumber()))
return Encode::null();
ScopedString s(scope, ctx->d()->engine->newString(QStringLiteral("toISOString")));
ScopedValue v(scope, O->objectValue()->get(s.getPointer()));
FunctionObject *toIso = v->asFunctionObject();
if (!toIso)
return ctx->throwTypeError();
ScopedCallData callData(scope, 0);
callData->thisObject = ctx->d()->callData->thisObject;
return toIso->call(callData);
}
NODE_IMPLEMENTATION(Curry::node, Pointer)
{
Process* p = NODE_THREAD.process();
Context* c = p->context();
FunctionObject* o = NODE_ARG_OBJECT(1, FunctionObject);
bool d = NODE_ARG(2, bool);
const Function* F = o->function();
Function::ArgumentVector args(F->numArgs() + F->numFreeVariables());
vector<bool> mask(args.size());
for (int i=0, s=args.size(); i < s; i++)
{
mask[i] = NODE_THIS.argNode(i+3)->symbol() != c->noop();
if (mask[i])
{
args[i] = NODE_ANY_TYPE_ARG(i+3);
}
}
NODE_RETURN(Pointer(evaluate(NODE_THREAD, o, args, mask, d)));
}
ReturnedValue FunctionPrototype::method_apply(CallContext *ctx)
{
Scope scope(ctx);
FunctionObject *o = ctx->callData->thisObject.asFunctionObject();
if (!o)
return ctx->throwTypeError();
ScopedValue arg(scope, ctx->argument(1));
ScopedObject arr(scope, arg);
quint32 len;
if (!arr) {
len = 0;
if (!arg->isNullOrUndefined())
return ctx->throwTypeError();
} else {
len = ArrayPrototype::getLength(ctx, arr);
}
ScopedCallData callData(scope, len);
if (len) {
if (!(arr->flags & SimpleArray) || arr->protoHasArray() || arr->hasAccessorProperty) {
for (quint32 i = 0; i < len; ++i)
callData->args[i] = arr->getIndexed(i);
} else {
int alen = qMin(len, arr->arrayDataLen);
for (int i = 0; i < alen; ++i)
callData->args[i] = arr->arrayData[i].value;
for (quint32 i = alen; i < len; ++i)
callData->args[i] = Primitive::undefinedValue();
}
}
callData->thisObject = ctx->argument(0);
return o->call(callData);
}
bool ExecutionContext::deleteProperty(String *name)
{
Scope scope(this);
bool hasWith = false;
for (ExecutionContext *ctx = this; ctx; ctx = ctx->d()->outer) {
if (ctx->d()->type == Type_WithContext) {
hasWith = true;
WithContext *w = static_cast<WithContext *>(ctx);
if (w->d()->withObject->hasProperty(name))
return w->d()->withObject->deleteProperty(name);
} else if (ctx->d()->type == Type_CatchContext) {
CatchContext *c = static_cast<CatchContext *>(ctx);
if (c->d()->exceptionVarName->isEqualTo(name))
return false;
} else if (ctx->d()->type >= Type_CallContext) {
CallContext *c = static_cast<CallContext *>(ctx);
FunctionObject *f = c->d()->function;
if (f->needsActivation() || hasWith) {
uint index = f->function()->internalClass->find(name);
if (index < UINT_MAX)
// ### throw in strict mode?
return false;
}
if (c->d()->activation && c->d()->activation->hasProperty(name))
return c->d()->activation->deleteProperty(name);
} else if (ctx->d()->type == Type_GlobalContext) {
GlobalContext *g = static_cast<GlobalContext *>(ctx);
if (g->d()->global->hasProperty(name))
return g->d()->global->deleteProperty(name);
}
}
if (d()->strictMode)
throwSyntaxError(QStringLiteral("Can't delete property %1").arg(name->toQString()));
return true;
}
NODE_IMPLEMENTATION(DynamicPartialEvaluate::node, Pointer)
{
typedef FunctionSpecializer Generator;
FunctionObject* f = NODE_ARG_OBJECT(1, FunctionObject);
Generator::ArgumentVector args(f->function()->numArgs() +
f->function()->numFreeVariables());
Generator::ArgumentMask mask(args.size());
Process* p = NODE_THREAD.process();
Context* c = p->context();
for (int i=0; i < args.size(); i++)
{
mask[i] = NODE_THIS.argNode(i+2)->symbol() != c->noop();
if (mask[i])
{
args[i] = NODE_ANY_TYPE_ARG(i+2);
}
}
try
{
Generator evaluator(f->function(), p, &NODE_THREAD);
evaluator.partiallyEvaluate(args, mask);
const FunctionType* rt = evaluator.result()->type();
assert(rt == NODE_THIS.argNode(0)->type());
FunctionObject* o = new FunctionObject(rt);
o->setFunction(evaluator.result());
NODE_RETURN(Pointer(o));
}
catch (Exception& e)
{
ProgramException exc(NODE_THREAD);
exc.message() = e.message();
exc.message() += " during partial evaluation of ";
exc.message() += f->function()->name().c_str();
throw exc;
}
}
QString Stringify::Str(const QString &key, ValueRef v)
{
Scope scope(ctx);
ScopedValue value(scope, *v);
ScopedObject o(scope, value);
if (o) {
ScopedString s(scope, ctx->d()->engine->newString(QStringLiteral("toJSON")));
Scoped<FunctionObject> toJSON(scope, o->get(s.getPointer()));
if (!!toJSON) {
ScopedCallData callData(scope, 1);
callData->thisObject = value;
callData->args[0] = ctx->d()->engine->newString(key);
value = toJSON->call(callData);
}
}
if (replacerFunction) {
ScopedObject holder(scope, ctx->d()->engine->newObject());
holder->put(ctx, QString(), value);
ScopedCallData callData(scope, 2);
callData->args[0] = ctx->d()->engine->newString(key);
callData->args[1] = value;
callData->thisObject = holder;
value = replacerFunction->call(callData);
}
o = value.asReturnedValue();
if (o) {
if (NumberObject *n = o->asNumberObject())
value = n->value();
else if (StringObject *so = o->asStringObject())
value = so->d()->value;
else if (BooleanObject *b =o->asBooleanObject())
value = b->value();
}
if (value->isNull())
return QStringLiteral("null");
if (value->isBoolean())
return value->booleanValue() ? QStringLiteral("true") : QStringLiteral("false");
if (value->isString())
return quote(value->stringValue()->toQString());
if (value->isNumber()) {
double d = value->toNumber();
return std::isfinite(d) ? value->toString(ctx)->toQString() : QStringLiteral("null");
}
o = value.asReturnedValue();
if (o) {
if (!o->asFunctionObject()) {
if (o->asArrayObject()) {
ScopedArrayObject a(scope, o);
return JA(a);
} else {
return JO(o);
}
}
}
return QString();
}
ReturnedValue ExecutionContext::getPropertyAndBase(String *name, Object *&base)
{
Scope scope(this);
ScopedValue v(scope);
base = (Object *)0;
name->makeIdentifier();
if (name->equals(d()->engine->id_this.getPointer()))
return d()->callData->thisObject.asReturnedValue();
bool hasWith = false;
bool hasCatchScope = false;
for (ExecutionContext *ctx = this; ctx; ctx = ctx->d()->outer) {
if (ctx->d()->type == Type_WithContext) {
Object *w = static_cast<WithContext *>(ctx)->d()->withObject;
hasWith = true;
bool hasProperty = false;
v = w->get(name, &hasProperty);
if (hasProperty) {
base = w;
return v.asReturnedValue();
}
continue;
}
else if (ctx->d()->type == Type_CatchContext) {
hasCatchScope = true;
CatchContext *c = static_cast<CatchContext *>(ctx);
if (c->d()->exceptionVarName->isEqualTo(name))
return c->d()->exceptionValue.asReturnedValue();
}
else if (ctx->d()->type >= Type_CallContext) {
QV4::CallContext *c = static_cast<CallContext *>(ctx);
FunctionObject *f = c->d()->function;
if (f->function() && (f->needsActivation() || hasWith || hasCatchScope)) {
uint index = f->function()->internalClass->find(name);
if (index < UINT_MAX) {
if (index < c->d()->function->formalParameterCount())
return c->d()->callData->args[c->d()->function->formalParameterCount() - index - 1].asReturnedValue();
return c->d()->locals[index - c->d()->function->formalParameterCount()].asReturnedValue();
}
}
if (c->d()->activation) {
bool hasProperty = false;
v = c->d()->activation->get(name, &hasProperty);
if (hasProperty) {
if (ctx->d()->type == Type_QmlContext)
base = c->d()->activation;
return v.asReturnedValue();
}
}
if (f->function() && f->function()->isNamedExpression()
&& name->equals(f->function()->name()))
return c->d()->function->asReturnedValue();
}
else if (ctx->d()->type == Type_GlobalContext) {
GlobalContext *g = static_cast<GlobalContext *>(ctx);
bool hasProperty = false;
v = g->d()->global->get(name, &hasProperty);
if (hasProperty)
return v.asReturnedValue();
}
}
ScopedValue n(scope, name);
return throwReferenceError(n);
}
NODE_IMPLEMENTATION(DynamicPartialApplication::node, Pointer)
{
//
// Never do partial application on the result of a lambda
// expression (its too difficult to archive). Instead do
// partial evaluation. The good side is that there will never
// be more than one level of indirection in multiple-curried
// lambda expressions. the bad side is that there will be
// more overhead upfront.
//
Process* p = NODE_THREAD.process();
Context* c = p->context();
FunctionObject* f = NODE_ARG_OBJECT(1, FunctionObject);
bool apply = f->function()->isLambda();
try
{
if (apply)
{
typedef PartialApplicator Generator;
Generator::ArgumentVector args(f->function()->numArgs() +
f->function()->numFreeVariables());
Generator::ArgumentMask mask(args.size());
for (int i=0; i < args.size(); i++)
{
mask[i] = NODE_THIS.argNode(i+2)->symbol() != c->noop();
if (mask[i])
{
args[i] = NODE_ANY_TYPE_ARG(i+2);
}
}
Generator evaluator(f->function(), p, &NODE_THREAD, args, mask);
const FunctionType* rt = evaluator.result()->type();
assert(rt == NODE_THIS.argNode(0)->type());
FunctionObject* o = new FunctionObject(rt);
o->setDependent(f);
o->setFunction(evaluator.result());
NODE_RETURN(Pointer(o));
}
else
{
typedef FunctionSpecializer Generator;
Generator::ArgumentVector args(f->function()->numArgs() +
f->function()->numFreeVariables());
Generator::ArgumentMask mask(args.size());
for (int i=0; i < args.size(); i++)
{
mask[i] = NODE_THIS.argNode(i+2)->symbol() != c->noop();
if (mask[i])
{
args[i] = NODE_ANY_TYPE_ARG(i+2);
}
}
Generator evaluator(f->function(), p, &NODE_THREAD);
evaluator.partiallyEvaluate(args, mask);
const FunctionType* rt = evaluator.result()->type();
assert(rt == NODE_THIS.argNode(0)->type());
FunctionObject* o = new FunctionObject(rt);
o->setFunction(evaluator.result());
NODE_RETURN(Pointer(o));
}
}
catch (Exception& e)
{
ProgramException exc(NODE_THREAD);
exc.message() = e.message();
exc.message() += " during partial ";
exc.message() += (apply ? "application" : "evaluation");
exc.message() += " of ";
exc.message() += f->function()->name().c_str();
throw exc;
}
}
