core.logic

Core.logic equivalent of multimethods

Details

  • Type: Enhancement Enhancement
  • Status: Open Open
  • Priority: Minor Minor
  • Resolution: Unresolved
  • Affects Version/s: None
  • Fix Version/s: None
  • Component/s: None
  • Labels:

Description

I need to define predicates to which I can later (and from other namespaces) attach further clauses (so not just facts). I couldn't find any such functionality in the source. Due to the extensive use of macros, hacking such a system onto core.logic from the outside is extremely difficult, if not impossible (to me at least).

I'd love to implement this myself too, if given an OK and rough direction.

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David Nolen added a comment -

I don't think the current implementation can really support this and I don't think it's wise to try to hack around the current implementation. I'd be willing to consider a comprehensive solution if someone is willing to do the legwork.

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David Nolen added a comment - I don't think the current implementation can really support this and I don't think it's wise to try to hack around the current implementation. I'd be willing to consider a comprehensive solution if someone is willing to do the legwork.
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Gabriel Pickard added a comment -

I actually did manage to tack on a prototype that covers the basic behavior I would like to see: https://github.com/werg/herpderp/blob/master/src/herpderp/multo.clj

I use a set stored in a ref in the defne's metadata to manage dynamic changes to the clauses. Upon changing that set using defclause I use eval to re-define the var using defne.

This might not be nice, but allows me to continue developing features against it.

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Gabriel Pickard added a comment - I actually did manage to tack on a prototype that covers the basic behavior I would like to see: https://github.com/werg/herpderp/blob/master/src/herpderp/multo.clj I use a set stored in a ref in the defne's metadata to manage dynamic changes to the clauses. Upon changing that set using defclause I use eval to re-define the var using defne. This might not be nice, but allows me to continue developing features against it.

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    Updated:
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