: compiled_expr_([&]() {

        auto compiled_expr =

            Filters::Common::Expr::CompiledExpression::Create(builder, cel_matcher->expr_match());

        if (!compiled_expr.ok()) {

          throw EnvoyException(

              absl::StrCat("failed to create an expression: ", compiled_expr.status().message()));

        }

        return std::move(compiled_expr.value());

      }()) {}

Matcher::MatchResult CelInputMatcher::match(const DataInputGetResult& input) {

  Protobuf::Arena arena;

  if (auto cel_data = input.customData<CelMatchData>(); cel_data) {

    auto eval_result = compiled_expr_.evaluate(*cel_data->activation_, &arena);

    if (eval_result.ok() && eval_result.value().IsBool()) {

      if (eval_result.value().BoolOrDie()) {

        return Matcher::MatchResult::Matched;

      }

    }

    if (Runtime::runtimeFeatureEnabled(

            "envoy.reloadable_features.enable_cel_response_path_matching") &&

        cel_data->needs_response() && !cel_data->has_response_data()) {

      return Matcher::MatchResult::InsufficientData;

    }

  }

  return Matcher::MatchResult::NoMatch;

}