Function LookupInList

eval/eval/container_access_step.cc:161–200

}

void LookupInList(const ListValue& cel_list, const Value& key,
                  ExecutionFrameBase& frame, Value& result) {
  absl::optional<int64_t> maybe_idx;
  if (frame.options().enable_heterogeneous_equality) {
    auto number = CelNumberFromValue(key);
    if (number.has_value() && number->LosslessConvertibleToInt()) {
      maybe_idx = number->AsInt();
    }
  } else if (InstanceOf<IntValue>(key)) {
    maybe_idx = key.GetInt().NativeValue();
  }

  if (!maybe_idx.has_value()) {
    result = cel::ErrorValue(absl::UnknownError(
        absl::StrCat("Index error: expected integer type, got ",
                     cel::KindToString(ValueKindToKind(key->kind())))));
    return;
  }

  int64_t idx = *maybe_idx;
  auto size = cel_list.Size();
  if (!size.ok()) {
    result = cel::ErrorValue(size.status());
    return;
  }
  if (idx < 0 || idx >= *size) {
    result = cel::ErrorValue(absl::UnknownError(
        absl::StrCat("Index error: index=", idx, " size=", *size)));
    return;
  }

  absl::Status lookup =
      cel_list.Get(idx, frame.descriptor_pool(), frame.message_factory(),
                   frame.arena(), &result);

  if (!lookup.ok()) {
    result = cel::ErrorValue(std::move(lookup));
  }
  ABSL_DCHECK(!result.IsUnknown());
}

void LookupInContainer(const Value& container, const Value& key,
                       ExecutionFrameBase& frame, Value& result) {