Re: [Haskell-cafe] Prettier pretty-printing of data types?
Hi all, I've got a question that pertains to any of these identify-region, parse, make-expandable approaches. The main use I'd like to use the trick for (esp. Chris's Emacs version) is to deal with large intermediate compiler ASTs. But if a compiler produces a long stream of output to stdout, with certain Show-produced ASTs embedded in it, what's the most expedient way to identify those regions that can be collapsed in the buffer and interactively expanded? - The user could define heuristics for identifying those regions in a particular stream of output - If the source is available, the compiler could be tweaked to obey a protocol, putting delimiters around collapsable output (possibly non-printing control sequences??) Or is there another hack I'm not thinking of? What's easiest? -Ryan On Wed, Mar 14, 2012 at 5:01 AM, Heinrich Apfelmus apfel...@quantentunnel.de wrote: Christopher Done wrote: Maybe an Emacs script to expand the nodes nicely: http://www.youtube.com/watch?**v=6ofEZQ7XoEAhttp://www.youtube.com/watch?v=6ofEZQ7XoEAI don't find mere pretty printing that useful compared to the “expanding” paradigm I'm used to in Chrome and Firebug. Great demo video. My recent GSoC project suggestions aims to make that available to non-Emacsers, via the web browser. http://hackage.haskell.org/**trac/summer-of-code/ticket/**1609http://hackage.haskell.org/trac/summer-of-code/ticket/1609 Best regards, Heinrich Apfelmus -- http://apfelmus.nfshost.com __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Prettier pretty-printing of data types?
On Sat, Mar 17, 2012 at 08:55, Ryan Newton rrnew...@gmail.com wrote:
- If the source is available, the compiler could be tweaked to obey a
protocol, putting delimiters around collapsable output (possibly
non-printing control sequences??)
I believe both emacs and vim have folding submodes which operate based on
comments containing {{{ / }}} to bracket foldable regions.
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brandon s allbery allber...@gmail.com
wandering unix systems administrator (available) (412) 475-9364 vm/sms
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Re: [Haskell-cafe] Prettier pretty-printing of data types?
Ah, great!
I gave it one very brief try with this mode:
http://www.emacswiki.org/emacs/FoldingMode
(folding-add-to-marks-list 'shell-mode #{{{ #}}} nil t)
But I just got not on a fold. Maybe it doesn't compose with shell mode?
It might be easier just to add similar functionality to a wrapper function
around Chris's folder/expander.
-Ryan
On Sat, Mar 17, 2012 at 9:10 AM, Brandon Allbery allber...@gmail.comwrote:
On Sat, Mar 17, 2012 at 08:55, Ryan Newton rrnew...@gmail.com wrote:
- If the source is available, the compiler could be tweaked to obey a
protocol, putting delimiters around collapsable output (possibly
non-printing control sequences??)
I believe both emacs and vim have folding submodes which operate based on
comments containing {{{ / }}} to bracket foldable regions.
--
brandon s allbery allber...@gmail.com
wandering unix systems administrator (available) (412) 475-9364 vm/sms
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Re: [Haskell-cafe] Prettier pretty-printing of data types?
On 17 March 2012 14:10, Brandon Allbery allber...@gmail.com wrote:
On Sat, Mar 17, 2012 at 08:55, Ryan Newton rrnew...@gmail.com wrote:
If the source is available, the compiler could be tweaked to obey a
protocol, putting delimiters around collapsable output (possibly
non-printing control sequences??)
I believe both emacs and vim have folding submodes which operate based on
comments containing {{{ / }}} to bracket foldable regions.
It's also easy in vim (and probably emacs too) to create folds from
syntax, which would work well with pretty-show's output.
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Re: [Haskell-cafe] Prettier pretty-printing of data types?
I guess you want an automatically derived show that indents, but if you don't mind defining you own, Data.PrettyPrint is really nice. Here is an example that produces roughly the same as your example: import Data.PrettyPrint tree2doc Leaf = text Leaf tree2doc (Bin x l r) = text Bin $$ nest 2 (text (show x) $$ tree2doc l $$ tree2doc r) showTree = render . tree2doc /Johan 2012/3/13 Johan Tibell johan.tib...@gmail.com: Hi all, The derived Show instance is useful, but I sometimes wish for something that's easier to read for big data types. Does anyone have an implementation of show that draws things in a hierarchical manner? Example: Given data Tree a = Leaf | Bin Int a (Tree a) (Tree a) and value = Bin 1 (Bin 2 Leaf Leaf) (Bin 3 Leaf Leaf) draw as Bin 1 Bin 2 Leaf Leaf Bin 3 Leaf Leaf Cheers, Johan ___ 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
Re: [Haskell-cafe] Prettier pretty-printing of data types?
Hi, On Wed, Mar 14, 2012 at 07:54, Johan Holmquist holmi...@gmail.com wrote: I guess you want an automatically derived show that indents, but if you don't mind defining you own, Data.PrettyPrint is really nice. Though most likely any form of pretty-printing will be generic, and can be defined with GHC.Generics [1], for instance. Cheers, Pedro [1] http://www.haskell.org/haskellwiki/Generics ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Prettier pretty-printing of data types?
Christopher Done wrote: Maybe an Emacs script to expand the nodes nicely: http://www.youtube.com/watch?v=6ofEZQ7XoEA I don't find mere pretty printing that useful compared to the “expanding” paradigm I'm used to in Chrome and Firebug. Great demo video. My recent GSoC project suggestions aims to make that available to non-Emacsers, via the web browser. http://hackage.haskell.org/trac/summer-of-code/ticket/1609 Best regards, Heinrich Apfelmus -- http://apfelmus.nfshost.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Prettier pretty-printing of data types?
Hi all, The derived Show instance is useful, but I sometimes wish for something that's easier to read for big data types. Does anyone have an implementation of show that draws things in a hierarchical manner? Example: Given data Tree a = Leaf | Bin Int a (Tree a) (Tree a) and value = Bin 1 (Bin 2 Leaf Leaf) (Bin 3 Leaf Leaf) draw as Bin 1 Bin 2 Leaf Leaf Bin 3 Leaf Leaf Cheers, Johan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Prettier pretty-printing of data types?
It's not exactly hierarchical, but Groom most certainly should help with getting much prettier output: http://hackage.haskell.org/package/groom On Tue, Mar 13, 2012 at 5:33 PM, Johan Tibell johan.tib...@gmail.com wrote: Hi all, The derived Show instance is useful, but I sometimes wish for something that's easier to read for big data types. Does anyone have an implementation of show that draws things in a hierarchical manner? Example: Given data Tree a = Leaf | Bin Int a (Tree a) (Tree a) and value = Bin 1 (Bin 2 Leaf Leaf) (Bin 3 Leaf Leaf) draw as Bin 1 Bin 2 Leaf Leaf Bin 3 Leaf Leaf Cheers, Johan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Regards, Austin ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Prettier pretty-printing of data types?
On 03/13/2012 10:33 PM, Johan Tibell wrote: value = Bin 1 (Bin 2 Leaf Leaf) (Bin 3 Leaf Leaf) I'm usually using the following snippet which is a tweak of the gshow function from syb. However everything need to be a member of Data/Typeable, and also list are not particularly well handled with this. gshowHier :: Data a = Int - a - String gshowHier il a = intercalate \n (constr : gmapQ (gshowHier (il+2)) a) where constr = replicate il ' ' ++ (showConstr $ toConstr a) -- Vincent ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Prettier pretty-printing of data types?
I prefer pretty-show rather than groom as it's output is hierarchical. http://hackage.haskell.org/package/pretty-show Ozgur On 13 March 2012 22:37, Austin Seipp mad@gmail.com wrote: It's not exactly hierarchical, but Groom most certainly should help with getting much prettier output: http://hackage.haskell.org/package/groom ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Prettier pretty-printing of data types?
Maybe an Emacs script to expand the nodes nicely: http://www.youtube.com/watch?v=6ofEZQ7XoEA I don't find mere pretty printing that useful compared to the “expanding” paradigm I'm used to in Chrome and Firebug. To try it just M-x eval-buffer on these two files, http://www.emacswiki.org/emacs/download/peg.el https://raw.github.com/chrisdone/haskell-emacs/master/src/hs-show.el then make some fresh empty buffer with some demo Show output code: BinJab 1 (Biny 2 Leaf Leaf) (Binpo 3 Leaf Leaf) (Binamr 3 Leaf (Lalar 3 Leaf Leaf)) and try, maybe, M-: (hs-show-replace (point-min) (point-max)) you should get “BinJab”, and then clicking it will give you more until you have: http://i.imgur.com/a7rvz.png The parser is of course a PEG parser within elisp so it kind of sucks for large data structures (limited by Elisp's stack, and is super slow). My haskell-emacs package has it in the REPL but I want to replace this parser with a haskell-src-exts→sexp utility to make it faster and more reliable. If anyone wants to replace the parser (and indeed the shower) as described, I'd be very happy as this is a Super Nice feature and indispensable in the REPL with “real” data. Ciao! ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
