[HN Gopher] Gecode is an open source C++ toolkit for developing ...
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Gecode is an open source C++ toolkit for developing constraint-
based systems (2019)
Author : gjvc
Score : 59 points
Date : 2025-07-05 08:43 UTC (14 hours ago)
(HTM) web link (www.gecode.org)
(TXT) w3m dump (www.gecode.org)
| gjvc wrote:
| see also https://github.com/Gecode/gecode
| mzl wrote:
| Note, the release/6.3.0 branch is the current release.
| ur-whale wrote:
| A short C++ example of gecode in use on their home page would be
| real nice.
| wavemode wrote:
| there are examples in the repo:
| https://github.com/Gecode/gecode/tree/master/examples
| ur-whale wrote:
| Thanks for pointing those out, I did in fact find them
| because my interest level was high enough that I went digging
| in the github repo.
|
| But as I explain above, a key thing for tech. things like
| this, which are interesting in an of themselves, is to hook
| the casual passer-by by very quickly showing him/her what it
| is about.
|
| For this, you want a very short example front and center on
| your homepage to get people with little time to see what the
| stuff can actually do.
| mzl wrote:
| Adding to wavemode, the Sudoku example is a good starting
| point:
| https://github.com/Gecode/gecode/blob/master/examples/sudoku...
|
| In the documentation (https://www.gecode.org/doc-
| latest/MPG.pdf) there are a lot of worked examples as well.
| ur-whale wrote:
| Yes, I found those.
|
| The point is to make the example front and center on the
| homepage so as to very quickly show what this is about to the
| casual passer-by.
| CamperBob2 wrote:
| for (int i=0; i<nn; i++) { distinct(*this,
| m.row(i), opt.ipl()); distinct(*this, m.col(i),
| opt.ipl()); }
|
| Weird way to use C++, passing *this to everything explicitly,
| but maybe they have a reason.
| nurettin wrote:
| Qt does this as well. It is a common way of preserving a
| parent-child relationship.
| aninteger wrote:
| For some reason I pictured this software as a system for
| developing memory or CPU constrained software. Like granting only
| 1 mb of memory and maybe having functions executed in a certain
| number of "clock ticks"
| stargrazer wrote:
| Interesting, but why post it? Nothing seems to have been
| committed/updated in about 6 years. There are a number of PRs
| outstanding. Is it still in use?
|
| The forum implies that not much maintenance happened after the
| passing of the primary contributor, even if there were good
| intentions.
|
| Are there other constraint solvers which have subsumed this one?
| osivertsson wrote:
| I did not know Christian Schulte had passed away! That is sad
| news that reaches me now five years on from his passing.
|
| https://intra.kth.se/en/eecs/nyheter/in-memory-of-christian-...
|
| I met Christian at a conference in Lund back in 2005 as I was
| doing my master thesis within the constraint programming area.
| He came across as both very knowledgeable and very kind and
| caring. RIP Christian.
| nlewycky wrote:
| Gecode won the minizinc challenges from inception of the
| challenge in 2008 until 2012, but these days or-tools wins gold
| every year 2013 to 2024, and in 2024 swept gold in all
| categories.
|
| Why is gecode interesting? Why use it over or-tools?
|
| https://www.minizinc.org/challenge/
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(page generated 2025-07-05 23:00 UTC)