[SR-Users] My wish

[Alex Balashov]

Hi Marius,

On 04/10/2010 02:19 AM, Marius Zbihlei wrote:

> Hello Alex,
>
>  > Thus, it is not possible
>  > in advance to know which modules will be loaded, nor possible to
>  > iterate through some list and combine them into a string, so I cannot do:
>  >
>  > modparam("mod1|mod2|mod3", "db_url", ...)
>
> Regarding the modparam statement, I think you can. Unfortunately, I
> can't test it a.t.m., but as far as I remember I think the modparam
> statement succeeds even if only one of the modules listed in the module
> section is configured correctly. For example you can have something like
>
> modparam("carrierroute|xyz", "db_url", ....)
>
> and work, even if xyz module doesn't exist (yet).

I agree, this is possible, but I find it an inelegant solution;  it 
still requires me to anticipate every conceivable module that could be 
loaded elsewhere in the configuration, and this is not as easy as it 
sounds given its highly flexible, indeterminate nature.  It's also 
just not pretty.

> As another approach goes, I was thinking of having something like a
> preprocessor for ser cfg language. The lexer now only supports #define
> and #ifdef's but doesn't support macro substitution. The #define's and
> #ifdef's are integrated into the lexer and not an performed as a
> separate initial step, thus full macro support is hard to integrate.
>
> Your code might look smth like this :
>
> #define DBURL "mysql://..."
>
> modparam("module", "db_url", DBURL)
>
> In my opinion it will be a nice feature.

I agree, and think that would be wonderful.  My only goal is to be 
able to define arbitrary constants in the config and use them anywhere 
in script, including module parameters.

Cheers,

-- 
Alex Balashov - Principal
Evariste Systems LLC
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