# What do you think should be in OTP? **URL:** \ **Category:** Chat / Discussions\ **Tags:** community, otp\ **Created:** [November 13, 2021, 6:32pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556 "2021-11-13T18:32:26Z")\ **Posts on this page:** 20\ **Page:** 5
**Author:** ![lpil](https://erlangforums.com/user_avatar/erlangforums.com/lpil/32/222_2.png) [@lpil](https://erlangforums.com/u/lpil)\ **Post date:** [January 21, 2022, 3:34pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/82 "2022-01-21T15:34:54Z")
> [@meox](#): > > yes what I’m looking for is a simple way to use that macro/guards without reimplementing it over and over Would a header file do? It’s quite common to have macros in header files. For example the ones for EUnit, for assertions, and for the logger. ---
**Author:** ![LeonardB](https://erlangforums.com/user_avatar/erlangforums.com/leonardb/32/1856_2.png) [@LeonardB](https://erlangforums.com/u/LeonardB)\ **Post date:** [January 21, 2022, 4:12pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/83 "2022-01-21T16:12:55Z")
The functions you’re looking for are in the inet\_parse module that can easily be wrapped into a utility function EG ```erlang is_ipv4(Ip) when is_list(Ip) -> inet_parse:ipv4_address(Ip) =/= {error,einval}; is_ipv4(Ip) when is_tuple(Ip) -> is_ipv4(inet_parse:ntoa(Ip)); is_ipv4(Ip) when is_binary(Ip) -> is_ipv4(binary_to_list(Ip)). ``` Edit: IIRC, when a module/function in OTP is “undocumented” it should be treated as private/unstable. Maybe it’s time the IP parsing functions were documented/promoted ---
**Author:** ![juhlig](https://erlangforums.com/user_avatar/erlangforums.com/juhlig/32/837_2.png) [@juhlig](https://erlangforums.com/u/juhlig)\ **Post date:** [January 21, 2022, 4:35pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/84 "2022-01-21T16:35:44Z")
> [@LeonardB](#): > > IIRC, when a module/function in OTP is “undocumented” it should be treated as private/unstable. > Maybe it’s time the IP parsing functions were documented/promoted Yes, and they _do_ have equivalents in `inet` 😉 [`inet:parse_address/1`](https://www.erlang.org/doc/man/inet.html#parse_address-1) and friends. Anyway… the conversion and parsing needed to use those functions for this purpose is pretty expensive I think 😅 ---
**Author:** ![vkatsuba](https://erlangforums.com/user_avatar/erlangforums.com/vkatsuba/32/314_2.png) [@vkatsuba](https://erlangforums.com/u/vkatsuba)\ **Post date:** [January 21, 2022, 6:50pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/85 "2022-01-21T18:50:49Z")
> [@meox](#): > > 3 new guards: > > - is\_ip(IP): is\_ipv4(IP) orelse is\_ipv6(IP) > - is\_ipv4(IP) > - is\_ipv6(IP) Oh yes, great idea - have possibilities to to set of custom guards if they are needed for project/lib/application 🕶 ---
**Author:** ![Maria-12648430](https://erlangforums.com/user_avatar/erlangforums.com/maria-12648430/32/604_2.png) [@Maria-12648430](https://erlangforums.com/u/Maria-12648430)\ **Post date:** [January 26, 2022, 11:34am UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/86 "2022-01-26T11:34:20Z")
FWIW: [Add IP checking functions to the inet module by Maria-12648430 · Pull Request #5646 · erlang/otp · GitHub](https://github.com/erlang/otp/pull/5646) Not what @meox wanted (guards), but better than having to re-implement IP checks in user code 😉 ---
**Author:** ![maxlapshin](https://erlangforums.com/user_avatar/erlangforums.com/maxlapshin/32/1593_2.png) [@maxlapshin](https://erlangforums.com/u/maxlapshin)\ **Post date:** [August 13, 2022, 4:05am UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/87 "2022-08-13T04:05:18Z")
Maybe some well defined approaches for library dependency injection. When I install third-party library, I do not want it to download another http client just because author had to do it. I want to provide some callback on application basic level. It would be good to have it is a standard for community. ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 1:39pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/88 "2022-08-13T13:39:28Z")
- GUI: not always alpha/beta wx, but Tk or/and Qt - lz4 (with lzhc) along with gzip/zlib - not rebar3 but improved make/Emakefile build tool ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 3:40pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/89 "2022-08-13T15:40:27Z")
> JSON-RPC Ugly JSON must die. > BERT/BERT-RPC Definitely no. ---
**Author:** ![vkatsuba](https://erlangforums.com/user_avatar/erlangforums.com/vkatsuba/32/314_2.png) [@vkatsuba](https://erlangforums.com/u/vkatsuba)\ **Post date:** [August 13, 2022, 3:55pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/90 "2022-08-13T15:55:54Z")
Interesting statements 🙃. `Ugly JSON must die.` - Why? Alternatives? `Definitely no.` - Why? ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:03pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/91 "2022-08-13T16:03:04Z")
> [@meox](#): > > 3 new guards: > > - is\_ip(IP): is\_ipv4(IP) orelse is\_ipv6(IP) > - is\_ipv4(IP) > - is\_ipv6(IP) Guards? Yes, I agree that `is_ipv4(A) -> is_binary(A) andalso inet:parse_ipv4strict_address(binary_to_list(A)) =/= {error, einval}.` is too bulky (especially beacouse binary\_to\_list/1), but guard, really? ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:07pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/92 "2022-08-13T16:07:32Z")
> `Ugly JSON must die.` - Why? Because it’s ugly and stupid > Alternatives? term\_to\_binary/1,2 message pack cbor > `Definitely no.` - Why? Because it’s obsoleted and term\_to\_binary/1,2 faster and better. ---
**Author:** ![vkatsuba](https://erlangforums.com/user_avatar/erlangforums.com/vkatsuba/32/314_2.png) [@vkatsuba](https://erlangforums.com/u/vkatsuba)\ **Post date:** [August 13, 2022, 4:16pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/93 "2022-08-13T16:16:06Z")
Well the `BERT` is use in the background `term_to_binary` 🙃 - of course this is related to the implementation but in any case it is used. About `Because it’s ugly and stupid` not sure that this is a good explanation 🙃. Any examples what is made you think so? ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:23pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/94 "2022-08-13T16:23:44Z")
Because term\_to\_binary/1,2 cover all erlang type, cbor can cover all erlang types, MessagePack cover most of erlang types. And JSON is ugly and stupid (and yes, also according to js-developers). ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:24pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/95 "2022-08-13T16:24:56Z")
> `BERT` is use in the background `term_to_binary` No, it don’t. ---
**Author:** ![vkatsuba](https://erlangforums.com/user_avatar/erlangforums.com/vkatsuba/32/314_2.png) [@vkatsuba](https://erlangforums.com/u/vkatsuba)\ **Post date:** [August 13, 2022, 4:29pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/96 "2022-08-13T16:29:29Z")
> [@Led](#): > > (and yes, also according to js-developers) Interesting. But without `js-developers` you could not join and communicate in such a great forum as this one. I’m already silent about thousands of other useful resources. `No, it don’t.` Hm… Yep it is used [bert.erl/src/bert.erl at master · mojombo/bert.erl · GitHub](https://github.com/mojombo/bert.erl/blob/master/src/bert.erl#L20) 🙃 and should be used, because `BERT` means `Binary ERlang Term` 😉 - so, without `term_to_binary` outside this will not works. ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:34pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/97 "2022-08-13T16:34:47Z")
> But without `js-developers` you could not join and communicate in such a great forum as this one. I meant “js-developers also think JSON is ugly and stupid” (AFAIK). ---
**Author:** ![vkatsuba](https://erlangforums.com/user_avatar/erlangforums.com/vkatsuba/32/314_2.png) [@vkatsuba](https://erlangforums.com/u/vkatsuba)\ **Post date:** [August 13, 2022, 4:36pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/98 "2022-08-13T16:36:32Z")
> [@Led](#): > > I meant “js-developers also think JSON is ugly and stupid” (AFAIK). Oh… my bad. Misunderstanding. Sorry. ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:37pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/99 "2022-08-13T16:37:53Z")
> Yep it is used [bert.erl/bert.erl at master · mojombo/bert.erl · GitHub](https://github.com/mojombo/bert.erl/blob/master/src/bert.erl#L20) I can’t find maps and atoms there:) ---
**Author:** ![Led](https://erlangforums.com/user_avatar/erlangforums.com/led/32/1594_2.png) [@Led](https://erlangforums.com/u/Led)\ **Post date:** [August 13, 2022, 4:40pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/100 "2022-08-13T16:40:04Z")
> Oh… my bad. Misunderstanding. Sorry. Or my bad:) My English far from perfect, sorry:) ---
**Author:** ![vkatsuba](https://erlangforums.com/user_avatar/erlangforums.com/vkatsuba/32/314_2.png) [@vkatsuba](https://erlangforums.com/u/vkatsuba)\ **Post date:** [August 13, 2022, 4:53pm UTC](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556/101 "2022-08-13T16:53:20Z")
> [@Led](#): > > I can’t find maps and atoms there:) You see I believe that this is a pet project which was experimental. But in this implementations is used some terms like `lists`, `tuples`, `maps`, you can find it in the logic in the [encode\_term/1](https://github.com/mojombo/bert.erl/blob/master/src/bert.erl#L32) and [decode\_term/1](https://github.com/mojombo/bert.erl/blob/master/src/bert.erl#L53). Perhaps the project is far from ideal, I saw more interesting implementations somewhere - but this may push us to implement something more impressive implementation. [Previous page](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556.md?page=4) [Next page](https://erlangforums.com/t/what-do-you-think-should-be-in-otp/556.md?page=6)