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[LOGIC-25] Allow retraction of previously stated facts in a relation Created: 11/Jan/12  Updated: 28/Jul/13  Resolved: 18/Jan/12

Status: Closed
Project: core.logic
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Enhancement Priority: Minor
Reporter: Michael Nygard Assignee: David Nolen
Resolution: Completed Votes: 0
Labels: new-feature

Attachments: Text File relational-retraction.patch     Text File relational-retraction.patch     Text File relational-retraction.patch    
Patch: Code and Test


For long-running or interactive programs, it is useful to allow facts to become "no longer" true at a point in time.

Comment by Michael Nygard [ 13/Jan/12 12:49 PM ]

I've found a bug in this patch. It doesn't handle indexes correctly. New patch coming soon.

Comment by Michael Nygard [ 13/Jan/12 1:42 PM ]

New patch that correctly updates indexes when retracting facts.

Comment by David Nolen [ 14/Jan/12 7:49 PM ]

This looks good but could we get a properly formatted patch w/ attribution information? Thanks!

Comment by Michael Nygard [ 15/Jan/12 11:24 AM ]

Happy to. What needs to be different for the patch to work? Also, what attribution are you looking for? Author info in the function?

Comment by David Nolen [ 16/Jan/12 4:26 PM ]

Did you make the patch with git? Git should add that information.

Comment by Michael Nygard [ 16/Jan/12 8:14 PM ]

I did make the patch with git.

Comment by David Nolen [ 18/Jan/12 11:26 AM ]

Normally git patches I've applied have a header like the following:

From 8a44aec861c91a9652f3d60093d3d556a490067e Mon Sep 17 00:00:00 2001
From: Bobby Calderwood <bobby_calderwood@mac.com>
Date: Fri, 13 Jan 2012 09:24:29 -0500
Subject: [PATCH] MultiFn implements IHash

How exactly are you creating the patch with git?

Comment by Michael Nygard [ 18/Jan/12 12:42 PM ]

I had been using git diff. New patch file attached using git format-patch. I think this is what you're looking for.

Comment by David Nolen [ 18/Jan/12 5:45 PM ]

Fixed, https://github.com/clojure/core.logic/compare/2e4bd26201...89005b726f

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