
Cafe, I've recently been playing with vim and wasn't quite satisfied with the existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode: https://github.com/travitch/hasksyn It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky. It might be useful to some people. Comments, bug reports, and suggestions welcome.

Hi
Have you seen vim2hs?
https://github.com/dag/vim2hs
On Sat, Mar 2, 2013 at 9:11 PM, Tristan Ravitch
Cafe,
I've recently been playing with vim and wasn't quite satisfied with the existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode:
https://github.com/travitch/hasksyn
It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky.
It might be useful to some people. Comments, bug reports, and suggestions welcome.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

I see now in your README that you have seen vim2hs. I'd love to hear what you disliked about it, especially given my plan to rewrite the whole thing [1]! :) [1] https://github.com/dag/vim2hs/issues/45 On Sun, Mar 3, 2013 at 3:38 PM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
Hi
Have you seen vim2hs?
On Sat, Mar 2, 2013 at 9:11 PM, Tristan Ravitch
wrote: Cafe,
I've recently been playing with vim and wasn't quite satisfied with the existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode:
https://github.com/travitch/hasksyn
It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky.
It might be useful to some people. Comments, bug reports, and suggestions welcome.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

I hadn't seen this before, but I tried it out, and the parts I'm interested in are nice. The indenting is less flaky than what I was using before (comments had issues). If you're rewriting things, though, it'd be nice to be able to customize indentation a little more. For instance, I like laying out ifs like: if foo then bar else baz But I like to lay out wheres as: foo = ... where bar = ... But both the indents here are based on shiftwidth, so they're tied together. Another 'nice to have' would be some intelligent outdenting. For instance, if you type a let block right now: let foo = zig bar = zag in ... That's what you'll get. It'd be nice if typing the 'in' snapped back to the let. I know it's possible to implement something like this, because the scala indentation mode I use frequently outdents when I type '=>' (which annoys the hell out of me, because it's almost never correct), but I don't know if it can be done intelligently enough to be useful (which would be important). Something to keep in mind, though. -- Dan On Sun, Mar 3, 2013 at 9:48 AM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
I see now in your README that you have seen vim2hs. I'd love to hear what you disliked about it, especially given my plan to rewrite the whole thing [1]! :)
[1] https://github.com/dag/vim2hs/issues/45
On Sun, Mar 3, 2013 at 3:38 PM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
Hi
Have you seen vim2hs?
On Sat, Mar 2, 2013 at 9:11 PM, Tristan Ravitch
wrote: Cafe,
I've recently been playing with vim and wasn't quite satisfied with the existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode:
https://github.com/travitch/hasksyn
It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky.
It might be useful to some people. Comments, bug reports, and suggestions welcome.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

I like automatic "outdenting" too, but I only came up with three cases where I felt like I could do it reliably: * With let/in as you described * After a catchall case: case ... of C1 -> ... C2 -> ... _ -> ... -- dedent back to here * And similarly after a do block ending in a return Even that last one is slightly questionable, I feel, but probably works for almost all cases. Are there any others? On Mon, Mar 04, 2013 at 12:20:12PM -0500, Dan Doel wrote:
I hadn't seen this before, but I tried it out, and the parts I'm interested in are nice. The indenting is less flaky than what I was using before (comments had issues).
If you're rewriting things, though, it'd be nice to be able to customize indentation a little more. For instance, I like laying out ifs like:
if foo then bar else baz
But I like to lay out wheres as:
foo = ... where bar = ...
But both the indents here are based on shiftwidth, so they're tied together.
Another 'nice to have' would be some intelligent outdenting. For instance, if you type a let block right now:
let foo = zig bar = zag in ...
That's what you'll get. It'd be nice if typing the 'in' snapped back to the let. I know it's possible to implement something like this, because the scala indentation mode I use frequently outdents when I type '=>' (which annoys the hell out of me, because it's almost never correct), but I don't know if it can be done intelligently enough to be useful (which would be important). Something to keep in mind, though.
-- Dan
On Sun, Mar 3, 2013 at 9:48 AM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
I see now in your README that you have seen vim2hs. I'd love to hear what you disliked about it, especially given my plan to rewrite the whole thing [1]! :)
[1] https://github.com/dag/vim2hs/issues/45
On Sun, Mar 3, 2013 at 3:38 PM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
Hi
Have you seen vim2hs?
On Sat, Mar 2, 2013 at 9:11 PM, Tristan Ravitch
wrote: Cafe,
I've recently been playing with vim and wasn't quite satisfied with the existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode:
https://github.com/travitch/hasksyn
It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky.
It might be useful to some people. Comments, bug reports, and suggestions welcome.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

They're hard to come by, but some other examples might be...
1) If you type something that is recognizably a guard, it could pop
back other guards:
foo x y z
| guard1 = do ...
| guard2 = -- outdent now
Not sure how feasible that one is.
2) When you type 'else', outdent to the same indentation as the
associated 'then'.
There may be others, but those are what I could think of after a few
minutes of pondering.
On Mon, Mar 4, 2013 at 12:40 PM, Tristan Ravitch
I like automatic "outdenting" too, but I only came up with three cases where I felt like I could do it reliably:
* With let/in as you described * After a catchall case:
case ... of C1 -> ... C2 -> ... _ -> ... -- dedent back to here
* And similarly after a do block ending in a return
Even that last one is slightly questionable, I feel, but probably works for almost all cases. Are there any others?
On Mon, Mar 04, 2013 at 12:20:12PM -0500, Dan Doel wrote:
I hadn't seen this before, but I tried it out, and the parts I'm interested in are nice. The indenting is less flaky than what I was using before (comments had issues).
If you're rewriting things, though, it'd be nice to be able to customize indentation a little more. For instance, I like laying out ifs like:
if foo then bar else baz
But I like to lay out wheres as:
foo = ... where bar = ...
But both the indents here are based on shiftwidth, so they're tied together.
Another 'nice to have' would be some intelligent outdenting. For instance, if you type a let block right now:
let foo = zig bar = zag in ...
That's what you'll get. It'd be nice if typing the 'in' snapped back to the let. I know it's possible to implement something like this, because the scala indentation mode I use frequently outdents when I type '=>' (which annoys the hell out of me, because it's almost never correct), but I don't know if it can be done intelligently enough to be useful (which would be important). Something to keep in mind, though.
-- Dan
On Sun, Mar 3, 2013 at 9:48 AM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
I see now in your README that you have seen vim2hs. I'd love to hear what you disliked about it, especially given my plan to rewrite the whole thing [1]! :)
[1] https://github.com/dag/vim2hs/issues/45
On Sun, Mar 3, 2013 at 3:38 PM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
Hi
Have you seen vim2hs?
On Sat, Mar 2, 2013 at 9:11 PM, Tristan Ravitch
wrote: Cafe,
I've recently been playing with vim and wasn't quite satisfied with the existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode:
https://github.com/travitch/hasksyn
It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky.
It might be useful to some people. Comments, bug reports, and suggestions welcome.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Hi,
I wrote a Haskell indenter for Haskell for the Kate editor a few years ago,
which – if I remember correctly – worked quite well. It's quite simple and
doesn't try to bee *too* clever, but has some logic for when it should
dedent. Not sure if it's helpful, but you could have a look (it's
well-commented javascript):
https://projects.kde.org/projects/kde/kde-baseapps/kate/repository/revisions...
Erlend
On 4 March 2013 09:40, Tristan Ravitch
I like automatic "outdenting" too, but I only came up with three cases where I felt like I could do it reliably:
* With let/in as you described * After a catchall case:
case ... of C1 -> ... C2 -> ... _ -> ... -- dedent back to here
* And similarly after a do block ending in a return
Even that last one is slightly questionable, I feel, but probably works for almost all cases. Are there any others?
I hadn't seen this before, but I tried it out, and the parts I'm interested in are nice. The indenting is less flaky than what I was using before (comments had issues).
If you're rewriting things, though, it'd be nice to be able to customize indentation a little more. For instance, I like laying out ifs like:
if foo then bar else baz
But I like to lay out wheres as:
foo = ... where bar = ...
But both the indents here are based on shiftwidth, so they're tied together.
Another 'nice to have' would be some intelligent outdenting. For instance, if you type a let block right now:
let foo = zig bar = zag in ...
That's what you'll get. It'd be nice if typing the 'in' snapped back to
let. I know it's possible to implement something like this, because the scala indentation mode I use frequently outdents when I type '=>' (which annoys the hell out of me, because it's almost never correct), but I don't know if it can be done intelligently enough to be useful (which would be important). Something to keep in mind, though.
-- Dan
On Sun, Mar 3, 2013 at 9:48 AM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
I see now in your README that you have seen vim2hs. I'd love to hear what you disliked about it, especially given my plan to rewrite the whole
[1]! :)
[1] https://github.com/dag/vim2hs/issues/45
On Sun, Mar 3, 2013 at 3:38 PM, dag.odenhall@gmail.com < dag.odenhall@gmail.com> wrote:
Hi
Have you seen vim2hs?
On Sat, Mar 2, 2013 at 9:11 PM, Tristan Ravitch
Cafe,
I've recently been playing with vim and wasn't quite satisfied with
On Mon, Mar 04, 2013 at 12:20:12PM -0500, Dan Doel wrote: the thing the
existing syntax highlighting and indentation, so I thought I'd try my hand at a new Haskell mode:
https://github.com/travitch/hasksyn
It is minimal in that it doesn't provide support for running external commands over code or anything fancy. It just does syntax highlighting and reasonably-smart indentation. There is no support for literate Haskell since supporting both with one mode is very tricky.
It might be useful to some people. Comments, bug reports, and suggestions welcome.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
-- Erlend Hamberg ehamberg@gmail.com

Here is the crazy idea; instead of having a vim plugin to "rule-them-all", why you don't join your efforts and create a plugin which does only indentation for Haskell code? This way, we could have a modular stack and be free to use whatever plugins work for syntax highlighting / unicode syntactic sugar / whatever, but still have a "de facto" plugin for indenting haskell code in Vim in a smart way :) A.-
participants (5)
-
Alfredo Di Napoli
-
dag.odenhall@gmail.com
-
Dan Doel
-
Erlend Hamberg
-
Tristan Ravitch