Notices

1. Wilfred Hughes (wilfredh@mastodon.social)'s status on Tuesday, 15-Jun-2021 09:53:42 CEST Wilfred Hughes

   A little more progress on my syntactic differ: now it only shows lines of things that have changed!

   Here's a Scheme example. Note that line 16 on the right has moved, but it's actually unchanged. Difftastic understands this :)

   • Wilfred Hughes (wilfredh@mastodon.social)'s status on Tuesday, 15-Jun-2021 09:53:42 CEST Wilfred Hughes

     in reply to

     How it works, roughly:

     The parsing is inspired by Comby: everything is an atom or a list.

     Tree diffing applies LCS diff at each level, then looks for subtrees that have moved.

     Finally there's tons of futzing with line positions to print something comprehensible.

     Ekaitz Zárraga 👹 repeated this.
   • Wilfred Hughes (wilfredh@mastodon.social)'s status on Tuesday, 15-Jun-2021 09:53:42 CEST Wilfred Hughes

     in reply to

     The test file is from https://fosdem.org/2021/schedule/event/sexpressiondiff/, which is a project exploring a pure-lisp solution to this problem.