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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "builtin/TupleObject.h"
#include "mozilla/Assertions.h"
#include "mozilla/Maybe.h" // mozilla::Maybe
#include "jsapi.h"
#include "vm/NativeObject.h"
#include "vm/ObjectOperations.h"
#include "vm/TupleType.h"
#include "vm/JSObject-inl.h"
#include "vm/NativeObject-inl.h"
using namespace js;
using mozilla::Maybe;
// Record and Tuple proposal section 9.2.1
TupleObject* TupleObject::create(JSContext* cx, Handle<TupleType*> tuple) {
TupleObject* tup = NewBuiltinClassInstance<TupleObject>(cx);
if (!tup) {
return nullptr;
}
tup->setFixedSlot(PrimitiveValueSlot, ExtendedPrimitiveValue(*tuple));
return tup;
}
// Caller is responsible for rooting the result
TupleType& TupleObject::unbox() const {
return getFixedSlot(PrimitiveValueSlot).toExtendedPrimitive().as<TupleType>();
}
// Caller is responsible for rooting the result
mozilla::Maybe<TupleType&> TupleObject::maybeUnbox(JSObject* obj) {
Maybe<TupleType&> result = mozilla::Nothing();
if (obj->is<TupleType>()) {
result.emplace(obj->as<TupleType>());
} else if (obj->is<TupleObject>()) {
result.emplace(obj->as<TupleObject>().unbox());
}
return result;
}
bool js::IsTuple(JSObject& obj) {
return (obj.is<TupleType>() || obj.is<TupleObject>());
}
// Caller is responsible for rooting the result
mozilla::Maybe<TupleType&> js::ThisTupleValue(JSContext* cx, HandleValue val) {
if (!js::IsTuple(val)) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_BAD_TUPLE_OBJECT);
return mozilla::Nothing();
}
Maybe<TupleType&> result = mozilla::Nothing();
result.emplace(TupleType::thisTupleValue(val));
return (result);
}
bool tup_mayResolve(const JSAtomState&, jsid id, JSObject*) {
// tup_resolve ignores non-integer ids.
return id.isInt();
}
bool tup_resolve(JSContext* cx, HandleObject obj, HandleId id,
bool* resolvedp) {
RootedValue value(cx);
*resolvedp = obj->as<TupleObject>().unbox().getOwnProperty(id, &value);
if (*resolvedp) {
static const unsigned TUPLE_ELEMENT_ATTRS =
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT;
return DefineDataProperty(cx, obj, id, value,
TUPLE_ELEMENT_ATTRS | JSPROP_RESOLVING);
}
return true;
}
const JSClassOps TupleObjectClassOps = {
nullptr, // addProperty
nullptr, // delProperty
nullptr, // enumerate
nullptr, // newEnumerate
tup_resolve, // resolve
tup_mayResolve, // mayResolve
nullptr, // finalize
nullptr, // call
nullptr, // construct
nullptr, // trace
};
const JSClass TupleObject::class_ = {
"TupleObject",
JSCLASS_HAS_RESERVED_SLOTS(SlotCount) |
JSCLASS_HAS_CACHED_PROTO(JSProto_Tuple),
&TupleObjectClassOps};
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