[erlang-questions] Guards syntax for multiple values

[Richard O'Keefe]

Take this as a code smell.  There is probably an abstraction missing in your
data struc

On Sat, 23 Mar 2019 at 20:40, Florent Gallaire <fgallaire@REDACTED> wrote:

> Hello everybody,
>
> I'm not very experimented in Erlang but I read carefully books and
> official documention.
>
> It seems to me that the guards syntax is not as good as it should be,
> i.e. too much verbose for multiple values.
>
> do(val1) -> val1;
> do(val2) -> val2;
> do(val3) -> val3;
> do(val4) -> val4;
> do(val5) -> val5.
>
> do(Val) when Val =:= val1; Val =:= val2; Val =:= val3; Val =:= val4;
> Val =:= val5 -> Val.
>
> It's boring and error prone to write.
>
> Has a "in tuple" syntax already be considered ? Something like :
>
> do(Val) when Val in {val1, val2, val3, val4, val5} -> Val.
>
> Cheers
>
> Florent
>
> --
> FLOSS Engineer & Lawyer
> _______________________________________________
> erlang-questions mailing list
> erlang-questions@REDACTED
> http://erlang.org/mailman/listinfo/erlang-questions
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20190325/ebf0b417/attachment.htm>