Reenable user structure function, user cuts, etc.

[Juergen Reuter]

clear ...

[Juergen Reuter]

Shall we move this to 2.1.1.?

[Juergen Reuter]

2.2.1, I meant ...

[Juergen Reuter]

Again the question: shall we move this to 2.2.1?

[Juergen Reuter]

WK, you wanna do this now, or shall we move it to 2.2.1?

[Juergen Reuter]

???

[kilian]

I'd like to discuss this at the Meeting next week. I could do something, but the question is what will (or may) be requested in the near future, by us developers or by users.

[Juergen Reuter]

There are two cases: user structure functions (user_strfun.sin) and user cuts (user_cut, user_event_shape, user_obs) in user_cuts.sin.

[Juergen Reuter]

As discussed with WK: user strfun probably possible at the moment, but no immediate use case. user_event_shape, user_cuts, user_obs will come after the revisions of the refactoring of variables/expressions module (#544), and the refactoring of the analysis module (#543).

[Juergen Reuter]

I put it back to 2.2.0 until the very end before the release.

[kilian]

What we are discussing here, is a kind of "plugin" facility.

The user may provide code snippets that are registered with WHIZARD, compiled when necessary via a dedicated Makefile (that could be generated automatically), and linked dynamically or statically upon request. I'd suggest that there is a dedicated subdirectory for this, similar to user-supplied models etc.

The interfaces that the plugins have to implement should be well-defined.

Even though we had something of this kind in the past, I still don't think that it is a good idea to reactivate this right now. The issue is not difficult, but a quick implementation is unlikely to remain sufficient. In any case, the interfaces will become subject to change for some time.

[Juergen Reuter]

After discussion with WK, we decided to mark this as "due to refactoring currently disabled" (which is a standard procedure even for languages like e.g. Python) and to finish it in the next upgrade.

[Juergen Reuter]

Milestone renamed

[Juergen Reuter]

As discussed with the members of the LC generator group, at the moment there is no more need for user structure functions. In case of future need, it is probably less complicated to implement the needed structure function directly in WHIZARD, taking also care of the specific mappings. User-defined cuts as external code as well as user observables are still desirable.

[Juergen Reuter]

Milestone renamed

[Juergen Reuter]

Transferred to Gitlab issue 319.