OpenEuphoria

Re: Help with plugin concept

• Posted by "Juergen Luethje" <j.lue at gmx.de> Feb 14, 2004
• 660 views

Rob wrote:

> Igor Kachan wrote:
>> Please, couldn't you explain more detailed what do you
>> mean when you say it does not work and it won't work.
>> What a reason ?
>
> The example code that you posted was...
>
>      P_S = open ("plugins.ew", "wb")
>      puts(P_S, PluginS)
>      close(P_S)
>
>      include plugins.ew
>
> The above code depends on the open() and puts() taking place
> before the include is processed. With the current
> interpreter that's what happens. With the current
> binder and translator that's not what happens.
> Rather, the binder and translator process the include file
> (and all other source code) first. Execution of statements
> happens later at run-time, when it's too late
> for the open/puts to have the desired effect.
>
> In the next release, with the clearer separation between
> front-end and back-end, the interpreter will also
> process the include (and all other source)
> before it executes any code.
> It will be simpler this way. I don't think a lot of
> people are actually using the above "dynamic" include
> technique, although it has been discussed on this list
> from time to time.
>
>> I run interpreted program to create the resulting include
>> file then run binder or translator with *ready* resulting
>> include file and *it works*.
>
> That's fine. You are first running a program that creates
> an include file, then *in a separate step* you are using that
> include file for translating or binding. However, the users
> of your program might not have the translator or binder,
> and even if they did, they might not want to run it.

<snip>

I believe using the next version of the interpreter, programs still
can take advantage of a dynamic include technique, when the code is
just put into 2 files rather than 1. Then again there are 2 separate
steps:

------------------------[ part1.exw ]------------------------
     P_S = open ("plugins.ew", "wb")
     puts(P_S, PluginS)
     close(P_S)
     system("exw.exe part2.exw", 2)

------------------------[ part2.exw ]------------------------
     include plugins.ew
     -- Here comes the main program ...
-------------------------------------------------------------

This should work with the interpreter 2.5, shouldn't it?

Regards,
   Juergen