uint32_t
GetIndexFromString(JSString *str)
{
// Masks the return value UINT32_MAX as failure to get the index.
// I.e. it is impossible to distinguish between failing to get the index
// or the actual index UINT32_MAX.
if (!str->isAtom())
return UINT32_MAX;
uint32_t index;
JSAtom *atom = &str->asAtom();
if (!atom->isIndex(&index))
return UINT32_MAX;
return index;
}
const StructField *
StructTypeRepresentation::fieldNamed(jsid id) const
{
if (!JSID_IS_ATOM(id))
return nullptr;
uint32_t unused;
JSAtom *atom = JSID_TO_ATOM(id);
if (atom->isIndex(&unused))
return nullptr;
PropertyName *name = atom->asPropertyName();
for (size_t i = 0; i < fieldCount(); i++) {
if (field(i).propertyName.get() == name)
return &field(i);
}
return nullptr;
}
