Hi, Vivien Kraus <viv...@planete-kraus.eu> skribis:
> Ludovic Courtès writes: >>> I am trying to use the guile reader to read scheme comments, in >>> addition to the syntax elements. I know with syntax-source where a >>> syntax object starts, and I can know where it ends by using a spying >>> soft port and re-reading it. However, the #\return ambiguity makes all >>> my efforts pointless. >> >> As you know, ‘read-syntax’ appeared in 3.0.7, so it’s brand new and we >> could certainly extend (ice-9 read) with more features, including >> reading comments. > I did not know that, to be honest. > >> In the meantime, I needed the ability to read comments in Guix, >> including with Guile < 3.0.7, so I hacked up this thing: >> >> >> https://git.savannah.gnu.org/cgit/guix.git/tree/guix/scripts/style.scm?h=core-updates&id=8419221620191d2988c22f6e7811d9ce1e0837bf#n50 >> >> It can read and write while preserving comments. > I was tempted not to use the guile reader and go and implement a new > reader like you did, but I was too afraid to miss one important thing in > the syntax. This hack is layered on top of the real ‘read’, so it cannot miss things. > I’m happy to see this pretty-print-with-comments function. I want guile > to have a tool that can automatically reformat scheme code, to avoid > indentation problems with code reviews and pointless discussions about > style. We could even tweak text editors to convert between different > styles for viewing the source and for git commits. I’m sure wisp people > would like it. I hope to see "guix style" one day :) It *is* ‘guix style’. :-) Currently the command is focusing on one very specific style issue, but we could certainly expand it for more general formatting. Ludo’.