Why do some people shun `if`?

[Michael P.]

On Mon, 16 Aug 2021 16:39:51 +0800
Vance Shipley <vances@REDACTED> wrote:

> Why I find 'if' awkward is that when I test a condition for the success
> path and have a fall through clause for the fail path the semantics don't
> match with 'true'.
>
>         if
>              Foo == 42 ->
>                   ok;
>              true ->
>                   {error, Foo}
>         end.

I cannot identify any "falling through":
no 'C-switch-case-no-break',
not in the "true" = 'C-switch-default' or 'else'.

I think I remember having employed some
`-define(if_not, true)`
when negation-or-ing all previous conditions
seemed too "dangerous".

~M

--

But who will test the tests?