Function user_arg_set

plugins/experimental/txn_box/plugin/src/ts_util.cc:179–183

  template <typename A = void>
  auto
  user_arg_set(TSHttpTxn txnp, int arg_idx, void *arg) -> std::enable_if_t<!has_TS_USER_ARGS<A>::value, void>
  {
    TSHttpTxnArgSet(txnp, arg_idx, eraser<A>(arg));
  }

  template <typename A = void>
  auto