Re: [exim] Fearure that Exim should have

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Autor: Wakko Warner
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A: exim-users
Assumpte: Re: [exim] Fearure that Exim should have
Eli Sand wrote:
> >     warn    acl=some_acl($var1, $var2)
> >         or keeping with the exim sense:
> >         acl=some_acl{$var1}{$var2}

>
> I figured that would be what a lot of people would think it'd end up looking
> like, however where did you get $var1 and $var2 from to pass to the acl? :)
> In reality, your line might end up looking like this:
>
>     warn  set $var1="some data"
>           set $var2="more data"
>           acl=some_acl{$var1}{$var2}


Actually, in that case, it would look more like:
acl=some_acl{some data}{more data}

> Now, replace my nice, uncluttered strings with some real Exim configuration
> jibberish (I'm too lazy to dig in my confs to get real world examples - but
> many of us know they can be somewhat long lines). As you can see, to make
> the call to the acl uncluttered with local variables, you still had to set 2
> variables, which could very well be global in the first place and then local
> variable passing isn't needed.


True. If the idea ever does get implemented, scoping could be hairy.
Without reading the ACL code, I don't know how bad it would be.

> Worse yet, say there was a way to execute commands in the call to the acl so
> you had something like this:
>
>     warn  acl=some_acl{if eq {...}{...} etc... {...blah blah...}{else
> ...}}{{you get the idea...}


There's always someone who will make something simple overly complex.

> Now, tell me that you wouldn't rather see a heap of braces like that then
> prefer to keep our global variables?


It's 1 line =)
There's always the same thing happening in other languages. Like perl!

> However, perhaps an overhaul of the entire parsing lexer might be a faaaaar
> off wishlist item, and in doing so perhaps may allow for a much nicer,
> graceful way of having local variables without all this potential havoc -
> THAT's something I'd vote for :P


I think it would be nice if it was more like a real language constructs.
Ie:
if (rbl($host)) deny;

> Or perhaps I've smoked something I shouldn't have and I'm confusing simple
> matters (wouldn't be a first)?


Maybe. I'm not really trying to get this into exim. I just thought about
it some time ago (even sent an email months back about it).

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