Function Has

eval/public/cel_value.h:607–621

Return whether the key is present within the map. Typically, key resolution will be a simple boolean result; however, there are scenarios where the conversion of the input key to the underlying key-type will produce an absl::StatusCode::kInvalidArgument. Evaluators are responsible for handling non-OK results by propagating the error, as appropriate, up the evaluation stack either as a `StatusOr`

  // error, as appropriate, up the evaluation stack either as a `StatusOr` or
  // as a `CelError` value, depending on the context.
  virtual absl::StatusOr<bool> Has(const CelValue& key) const {
    // This check safeguards against issues with invalid key types such as NaN.
    CEL_RETURN_IF_ERROR(CelValue::CheckMapKeyType(key));
    google::protobuf::Arena arena;
    auto value = (*this).Get(&arena, key);
    if (!value.has_value()) {
      return false;
    }
    // This protects from issues that may occur when looking up a key value,
    // such as a failure to convert an int64 to an int32 map key.
    if (value->IsError()) {
      return *value->ErrorOrDie();
    }
    return true;
  }

  // Map size
  virtual int size() const = 0;