From: Jeff King <peff@peff.net>
To: Derrick Stolee <stolee@gmail.com>
Cc: Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>,
git@vger.kernel.org, jcoglan@gmail.com,
Derrick Stolee <dstolee@microsoft.com>,
Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH 2/2] graph: fix collapse of multiple edges
Date: Wed, 8 Jan 2020 08:49:45 -0500 [thread overview]
Message-ID: <20200108134945.GA3390419@coredump.intra.peff.net> (raw)
In-Reply-To: <7a0e4637-85de-589f-df31-915b4603e45a@gmail.com>
On Wed, Jan 08, 2020 at 08:40:26AM -0500, Derrick Stolee wrote:
> > Hmm. Your description and your diagrams make sense to me. But one
> > curious thing is that the earlier test you added for 6_* does not need
> > modified. Because it continues to show:
> >
> > | | | | * 6_F
> > | |_|_|/|
> > |/| | |/
> > | | |/|
> > | |/| |
> > | * | | 6_D
> >
> > rather than adding a horizontal component to the second-parent line.
> > That seems inconsistent.
>
> The issue here is that there is not enough room for a second horizontal
> line. The horizontal line can only start after the previous has completely
> terminated, that is
>
> | | | | * 6_F
> | |_|_|/|
> |/| | |/
>
> at this point, the first horizontal line has terminated.
Ahhh, OK, that makes perfect sense. I didn't quite realize how the rules
for "going horizontal" worked.
> If there was one more row to the example, then we would have:
>
> | | | | | * 6_F
> | |_|_|_|/|
> |/| | | |/
> | | |_|/|
> | |/| | |
> | * | | | 6_D
Right, that makes sense. Thanks for explaining. And the patch otherwise
looked good to me; your explanation convinced me that this is the right
thing to do.
-Peff
next prev parent reply other threads:[~2020-01-08 13:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 4:27 [PATCH 0/2] Graph horizontal fix Derrick Stolee via GitGitGadget
2020-01-08 4:27 ` [PATCH 1/2] graph: add test to demonstrate horizontal line bug Derrick Stolee via GitGitGadget
2020-01-08 4:27 ` [PATCH 2/2] graph: fix collapse of multiple edges Derrick Stolee via GitGitGadget
2020-01-08 7:25 ` Jeff King
2020-01-08 13:40 ` Derrick Stolee
2020-01-08 13:49 ` Jeff King [this message]
2020-01-08 18:06 ` [PATCH 0/2] Graph horizontal fix Junio C Hamano
2020-01-08 20:05 ` Derrick Stolee
2020-01-08 21:06 ` Junio C Hamano
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