// ECMA 8.7.2
bool JSValue::putToPrimitive(ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (Optional<uint32_t> index = parseIndex(propertyName))
return putToPrimitiveByIndex(exec, index.value(), value, slot.isStrictMode());
// Check if there are any setters or getters in the prototype chain
JSObject* obj = synthesizePrototype(exec);
if (UNLIKELY(!obj))
return false;
JSValue prototype;
if (propertyName != exec->propertyNames().underscoreProto) {
for (; !obj->structure()->hasReadOnlyOrGetterSetterPropertiesExcludingProto(); obj = asObject(prototype)) {
prototype = obj->getPrototypeDirect();
if (prototype.isNull()) {
if (slot.isStrictMode())
throwTypeError(exec, scope, StrictModeReadonlyPropertyWriteError);
return false;
}
}
}
for (; ; obj = asObject(prototype)) {
unsigned attributes;
PropertyOffset offset = obj->structure()->get(vm, propertyName, attributes);
if (offset != invalidOffset) {
if (attributes & ReadOnly) {
if (slot.isStrictMode())
throwTypeError(exec, scope, StrictModeReadonlyPropertyWriteError);
return false;
}
JSValue gs = obj->getDirect(offset);
if (gs.isGetterSetter())
return callSetter(exec, *this, gs, value, slot.isStrictMode() ? StrictMode : NotStrictMode);
if (gs.isCustomGetterSetter())
return callCustomSetter(exec, gs, attributes & CustomAccessor, obj, slot.thisValue(), value);
// If there's an existing property on the object or one of its
// prototypes it should be replaced, so break here.
break;
}
prototype = obj->getPrototype(vm, exec);
if (vm.exception())
return false;
if (prototype.isNull())
break;
}
if (slot.isStrictMode())
throwTypeError(exec, scope, StrictModeReadonlyPropertyWriteError);
return false;
}
bool JSValue::putToPrimitiveByIndex(ExecState* exec, unsigned propertyName, JSValue value, bool shouldThrow)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (propertyName > MAX_ARRAY_INDEX) {
PutPropertySlot slot(*this, shouldThrow);
return putToPrimitive(exec, Identifier::from(exec, propertyName), value, slot);
}
JSObject* prototype = synthesizePrototype(exec);
if (UNLIKELY(!prototype)) {
ASSERT(scope.exception());
return false;
}
bool putResult = false;
if (prototype->attemptToInterceptPutByIndexOnHoleForPrototype(exec, *this, propertyName, value, shouldThrow, putResult))
return putResult;
return typeError(exec, scope, shouldThrow, ASCIILiteral(ReadonlyPropertyWriteError));
}
