Re: [Chicken-users] Much improved customized Emacs
Hi Dan, This is great work! I too work in constrained environments, mostly on mobile phones, so I'm really looking forward to use your package. I had some problems installing it through marmelade so I added a couple github issues. K. On Fri, Nov 23, 2012 at 3:40 AM, Daniel Leslie d...@ironoxide.ca wrote: I've released an Emacs package that encompasses the customizations I've made to the base scheme-mode. This is a heavy iteration on the work previously present on the wiki. It provides: - Syntax support for all presently installed modules, both bound symbols and macros. - Chicken-doc support where documentation exists (including a C-? binding to lookup the word-at-point). - Support for font-locking of the above. - Automatic loading of a defvar'd etag file, if you wish. - Auto-Complete and Font Locking of *prefixed* *symbols*; IE, if you imported Allegro with the prefix al: *then al:draw-triangle will have the draw-triangle portion correctly coloured and auto-completed*! Most importantly, and the itch that drove this endeavour, *this is all provided independent of a running REPL*. For those of us who tend to work on more unstable/low-level code that is prone to killing the REPL the higher-level functionality of the various scheme modes are frustratingly inconsistent at best. Now without the need for an active REPL we can enjoy full syntax highlighting, auto-completion and documentation. Now, there is one outstanding annoyance that I'd like to field the mailing list for suggestions on. At present, all symbols found via * ##sys#macro-environment* and *##sys#environment-symbols# *are given the font-lock-builtin-face. I'd like to know what's best not to include at all, and hear some suggestions on how best to divide up the rest. Right now it feels like that font-locking is a little *too* aggressive. And perhaps the one negative: in order to provide these features without the REPL a cache is built when scheme-mode is first loaded. I *highly* recommend you run Emacs from a daemon if you use this extension, so as to avoid unnecessarily recaching. That, or you can customize the *chicken-ac-modules* variable to just load the 'chicken' module and there will be nary a hitch, though far less completions. Anyhow, further details are available on the wiki: https://wiki.call-cc.org/dans-custom-emacs Thanks, -Dan ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] hash table questions
On Thu, Nov 22, 2012 at 07:56:31PM -0500, Claude Marinier wrote: Greetings fellow Schemers, Hello again, Having established in a previous post that using a u8vector as a key for a hash table is expected to work, I have some specific questions. I am still learning how to post questions properly. I hope this is clear and contains enough information. Don't worry too much about it. I just wanted to let you know so that you don't get yelled at on other lists (some people can be even ruder in their replies). By the way, how can I make the included code display properly? In Mozilla Firefox, it uses a proportional font. You're probably using the gmail web interface... You can probably select to use plain text instead of mail with markup somewhere. It's generally better to use a proper offline client; you'll have more control over how exactly the mail gets sent. It should be possible to do that even with gmail. 1) Is using a hash function other than the default worth the trouble? No, the default should be fine. I define the hash table this way. (define IPv4-table (make-hash-table IPv4-addr= (make-fixnum-bounded-hash FNVAHash))) I hadn't noticed you're using the hashes egg (you did mention that in your previous mail. I was just too confused to notice). Did you try using just srfi-69? It's best to only use a separate egg if you have specific requirements that the core doesn't address or if the egg provides enough convenience to warrant the dependency. Kon mentioned something about FNVAHash not hashing properly with u8vectors. The core srfi-69 implementation ought to do that fine. Cheers, Peter -- http://sjamaan.ath.cx -- The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music. -- Donald Knuth ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] hash table questions
By the way, You're probably using the gmail web interface... You can probably select to use plain text instead of mail with markup somewhere. It's generally better to use a proper offline client; you'll have more control over how exactly the mail gets sent. If using an offline client is not an option (e.g. need to access mail from lots of different locations), you can still style your GMail with an user JavaScript using extensions like Greasemonkey for Firefox, BlackCanvas for Chrome or built-in functionality in Opera (for example, you could detect the letter is from this mailing list and change font to monospaced). -- Best regards, Dmitry Kushnariov ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Much improved customized Emacs
Thanks! I appreciate the testing. WorksForMe usually doesn't cut the mustard, so your feedback is quite welcome. I fixed a few of the derps that was causing Marmalade to have issues; happy hacking! -Dan On Fri, Nov 23, 2012 at 2:26 AM, Kristian Lein-Mathisen kristianl...@gmail.com wrote: Hi Dan, This is great work! I too work in constrained environments, mostly on mobile phones, so I'm really looking forward to use your package. I had some problems installing it through marmelade so I added a couple github issues. K. On Fri, Nov 23, 2012 at 3:40 AM, Daniel Leslie d...@ironoxide.ca wrote: I've released an Emacs package that encompasses the customizations I've made to the base scheme-mode. This is a heavy iteration on the work previously present on the wiki. It provides: - Syntax support for all presently installed modules, both bound symbols and macros. - Chicken-doc support where documentation exists (including a C-? binding to lookup the word-at-point). - Support for font-locking of the above. - Automatic loading of a defvar'd etag file, if you wish. - Auto-Complete and Font Locking of *prefixed* *symbols*; IE, if you imported Allegro with the prefix al: *then al:draw-triangle will have the draw-triangle portion correctly coloured and auto-completed*! Most importantly, and the itch that drove this endeavour, *this is all provided independent of a running REPL*. For those of us who tend to work on more unstable/low-level code that is prone to killing the REPL the higher-level functionality of the various scheme modes are frustratingly inconsistent at best. Now without the need for an active REPL we can enjoy full syntax highlighting, auto-completion and documentation. Now, there is one outstanding annoyance that I'd like to field the mailing list for suggestions on. At present, all symbols found via * ##sys#macro-environment* and *##sys#environment-symbols# *are given the font-lock-builtin-face. I'd like to know what's best not to include at all, and hear some suggestions on how best to divide up the rest. Right now it feels like that font-locking is a little *too* aggressive. And perhaps the one negative: in order to provide these features without the REPL a cache is built when scheme-mode is first loaded. I *highly* recommend you run Emacs from a daemon if you use this extension, so as to avoid unnecessarily recaching. That, or you can customize the *chicken-ac-modules* variable to just load the 'chicken' module and there will be nary a hitch, though far less completions. Anyhow, further details are available on the wiki: https://wiki.call-cc.org/dans-custom-emacs Thanks, -Dan ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] using flymake with chicken
On Fri, Nov 23, 2012 at 08:27:32PM +0100, Peter Bex wrote: Suggestions are welcome. Flymake doesn't have default key bindings for going to the next/prev error. Maybe the mode can set up something like M-n and M-p to step between errors? Or does it make more sense to let the user do this so it can be customized consistently across languages that use flymake? Also: is there a way to show the error message? I found flymake-display-err-menu-for-current-line, but that gives an annoying popup with the message, which is cut off so you can't read the most important parts. Note that I'm not familiar with flymake itself, either. Cheers, Peter -- http://sjamaan.ath.cx -- The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music. -- Donald Knuth ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
[Chicken-users] undefined reference to `C_numbers_toplevel'
Hey everyone, I'm just starting out in Scheme, and trying to compile a small snippet that uses complex numbers. The code is as follows: (use numbers) (begin (display 3+3i) (newline) ) I installed the `numbers` egg with `chicken-install`, load it with `use`, and when I run it (as a script) through the interpreter `csi` it works perfectly. Unfortunately, when I try to compile it with: csc -uses numbers main.scm I get the following error: main.o: In function `C_toplevel': main.c:(.text+0x1c2): undefined reference to `C_numbers_toplevel' collect2: ld returned 1 exit status Error: shell command terminated with non-zero exit status 256: gcc main.o -o main -L/usr/local/lib -Wl,-R/usr/local/lib -lchicken -lm -ldl *Versions and specs:* - csc 4.8.0 (rev 0db1908) manually compiled - chicken-install 4.8.0 - numbers 2.8.1 - Fedora Linux 16 As far as I know, I haven't touched anything in the distribution either. Anyone have any ideas why this is happening? If you need more info, I'd be more than happy to give it! ~ Miguel ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] hash table questions
Hi, This may or may not be helpful, but I'll add that, if it were me, I'd represent an IP address as a list of four fixnums rather than a u8vector. Then the default hash function will work out of the box, and many of your functions can be written more concisely. E.g. (define IPv4-addr= equal?) (define (IPv4-address-string a) (string-intersperse (map number-string a) .)) It's true that a u8vector will be a bit more space-efficient, but IMO it's wise to refrain from that level of optimization unless and until it's the only way to deal with an observed bottleneck. Regards, Kevin Wortman On Thu, Nov 22, 2012 at 4:56 PM, Claude Marinier claudem...@gmail.comwrote: Greetings fellow Schemers, Having established in a previous post that using a u8vector as a key for a hash table is expected to work, I have some specific questions. I am still learning how to post questions properly. I hope this is clear and contains enough information. By the way, how can I make the included code display properly? In Mozilla Firefox, it uses a proportional font. 1) Is using a hash function other than the default worth the trouble? I define the hash table this way. (define IPv4-table (make-hash-table IPv4-addr= (make-fixnum-bounded-hash FNVAHash))) (declare (inline IPv4-addr=)) (define IPv4-addr= (lambda (addr1 addr2) (and (= (u8vector-ref addr1 0) (u8vector-ref addr2 0)) (= (u8vector-ref addr1 1) (u8vector-ref addr2 1)) (= (u8vector-ref addr1 2) (u8vector-ref addr2 2)) (= (u8vector-ref addr1 3) (u8vector-ref addr2 3) Would it be simpler, as effective, and almost as efficient to use the default? P.S. Is this the correct way to specific an alternate hash function? 2) Is this the correct way to add new records to the table and update existing records? (define update-IPv4-counters (lambda (addr direction proto tokens) (let ((IP-record (hash-table-ref/default IPv4-table addr #f))) (cond ((not (vector? IP-record)) ; addr is not in the table, this is a new entry (hash-table-set! IPv4-table addr (update-IP-record (make-IP-record) direction proto tokens))) (else ; addr is in the table, increment packets and add bytes (hash-table-set! IPv4-table addr (update-IP-record IP-record direction proto tokens))) Note that an IP record is a seven elements vector (i.e. created with make-vector). If I understand SRFI-69 correctly, hash-table-set! will replace a record with the same key. Is this correct? There cannot be duplicate keys, right? 3) This is how I dump the hash table. (define dump-data (lambda () (let* ((outport (open-output-file (make-dump-file-name))) (dump-IPv4-record (lambda (address IP-record) (write-with-indent (IPv4-address-string address) 1 outport) (dump-IP-protocols IP-record 1 outport (write-with-indent IPv4 0 outport) (hash-table-for-each IPv4-table dump-IPv4-record) ... (define IPv4-address-string (lambda (addr) (string-append (number-string (u8vector-ref addr 0)) . (number-string (u8vector-ref addr 1)) . (number-string (u8vector-ref addr 2)) . (number-string (u8vector-ref addr 3 This code displays two records with the same key and different data. This has happened more than once. I have kept the output files. If I call hash-table-set! with the same address as another record but in a different format (say a vector instead of a u8vector), would it choke or would it just create a new record without complaining? This would look like duplicate keys but they would be different. I assume that hash-table-for-each will present each key / record pair once and do so in some arbitrary order. Can I assume that dump-IPv4-record, when it calls IPv4-address-string, will choke on a key which is not a u8vector? I am looking for the mistake I made which is producing the illusion of a duplicate key in the hash table. I believe that confirming my assumptions is a good starting point. I hope this sort of question is not abusing the list members. Thank you for your patience. -- Claude Marinier ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] undefined reference to `C_numbers_toplevel'
On Fri, Nov 23, 2012 at 12:27:29PM -0800, Miguel Fernandez wrote: Hey everyone, Hello Miguel! I'm just starting out in Scheme, and trying to compile a small snippet that uses complex numbers. The code is as follows: (use numbers) (begin (display 3+3i) (newline) ) I installed the `numbers` egg with `chicken-install`, load it with `use`, and when I run it (as a script) through the interpreter `csi` it works perfectly. Unfortunately, when I try to compile it with: csc -uses numbers main.scm Hm, I think uses is for old-style units. Normally you'd just compile the program and it should work. Because numbers has special syntax that extends the basic reader you'll need to use csc -X numbers-syntax main.scm See also the docs: http://wiki.call-cc.org/eggref/4/numbers#compiled-code I get the following error: main.o: In function `C_toplevel': main.c:(.text+0x1c2): undefined reference to `C_numbers_toplevel' collect2: ld returned 1 exit status I'm not sure why that happens. I guess it's caused by the uses switch which assumes you're statically linking? Hope this helps, Peter -- http://sjamaan.ath.cx -- The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music. -- Donald Knuth ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] using flymake with chicken
Oh excellent! You may be able to remove the need for the shell script by running something like: (shell-command-to-string (format csi -SAv \%s\ || true option-or-filename)) Thanks, -Dan On Fri, Nov 23, 2012 at 11:05 AM, Felix fe...@call-with-current-continuation.org wrote: Hello! Attached is a first go at flymake[1] support for Scheme code. It is derived from flymake-lua.el and very simple. Put chicken-flymake in your PATH, make it executable, load flymake-chicken.el into your emacs, open some .scm file and do M-x flymake-chicken-mode Now, lines containing scrutinizer warnings (and other errors that show a line number) are highlighted. I have not used this seriously yet, but it's sort of weirdly cool ... I have added the code to the git repository (see the scripts and misc subdirectories). Suggestions are welcome. cheers, felix [1] http://www.emacswiki.org/emacs/FlyMake flymake for CHICKEN ;; Taken from: ;; https://github.com/sroccaserra/emacs/blob/master/flymake-lua.el ;; ;; Flymake for Lua ;; ;; Usage: ;; (require 'flymake-lua) ;; (add-hook 'lua-mode-hook 'flymake-lua-load) ;; ;; Note: litterally stolen from Steve Purcell's Flymake Ruby. ;; See http://github.com/purcell/emacs.d/blob/master/site-lisp/flymake-ruby/flymake-ruby.el ;; (require 'flymake) (defgroup flymake-chicken nil Flymake Chicken Customizations) (defcustom flymake-chicken-program chicken-flymake How to invoke csc. :type 'file :group 'flymake-chicken) (defun flymake-create-temp-in-system-tempdir (filename prefix) (make-temp-file (or prefix flymake-chicken))) (defun flymake-chicken-init () (list flymake-chicken-program (list (flymake-init-create-temp-buffer-copy 'flymake-create-temp-in-system-tempdir (defvar flymake-chicken-allowed-file-name-masks '((\\.scm\\' flymake-chicken-init))) (defvar flymake-chicken-err-line-patterns '(( *(\\(.+\\):\\([0-9]+\\)) * 1 2) (\\(Error\\|Warning\\|Note\\): *(line \\([0-9.]*\\)) nil 2))) ;(defvar flymake-lua-err-line-patterns ; '((^.*luac[0-9.]*\\(.exe\\)?: *\\(.*\\):\\([0-9]+\\): \\(.*\\)$ ;2 3 nil 4))) ;;;###autoload (defun flymake-chicken-mode () (interactive) (when (and (not (null buffer-file-name)) (file-writable-p buffer-file-name)) (set (make-local-variable 'flymake-allowed-file-name-masks) flymake-chicken-allowed-file-name-masks) (set (make-local-variable 'flymake-err-line-patterns) flymake-chicken-err-line-patterns) (flymake-mode t))) (provide 'flymake-chicken) #!/bin/sh # # usage: chicken-flymake OPTION-OR-FILENAME ... csc -SAv $@ || true ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] hash table questions
On Nov 23, 2012, at 1:58 PM, Kevin Wortman kwort...@gmail.com wrote: Hi, This may or may not be helpful, but I'll add that, if it were me, I'd represent an IP address as a list of four fixnums rather than a u8vector. Then the default hash function will work out of the box, and many of your functions can be written more concisely. E.g. (define IPv4-addr= equal?) (define (IPv4-address-string a) (string-intersperse (map number-string a) .)) It's true that a u8vector will be a bit more space-efficient, but IMO it's wise to refrain from that level of optimization unless and until it's the only way to deal with an observed bottleneck. Normally I wouldn't disagree with the basic idea here, although I would advocate a vector rather than list. However the existing srfi-69 implementation doesn't follow a pair's references. (Also I think there is a bug where list? beats pair? in the type discrimination.) But vectors (structures are treated as vectors) and vector-like objects do recurse into the contents, at least for 4 levels. Regards, Kevin Wortman On Thu, Nov 22, 2012 at 4:56 PM, Claude Marinier claudem...@gmail.com wrote: Greetings fellow Schemers, Having established in a previous post that using a u8vector as a key for a hash table is expected to work, I have some specific questions. I am still learning how to post questions properly. I hope this is clear and contains enough information. By the way, how can I make the included code display properly? In Mozilla Firefox, it uses a proportional font. 1) Is using a hash function other than the default worth the trouble? I define the hash table this way. (define IPv4-table (make-hash-table IPv4-addr= (make-fixnum-bounded-hash FNVAHash))) (declare (inline IPv4-addr=)) (define IPv4-addr= (lambda (addr1 addr2) (and (= (u8vector-ref addr1 0) (u8vector-ref addr2 0)) (= (u8vector-ref addr1 1) (u8vector-ref addr2 1)) (= (u8vector-ref addr1 2) (u8vector-ref addr2 2)) (= (u8vector-ref addr1 3) (u8vector-ref addr2 3) Would it be simpler, as effective, and almost as efficient to use the default? P.S. Is this the correct way to specific an alternate hash function? 2) Is this the correct way to add new records to the table and update existing records? (define update-IPv4-counters (lambda (addr direction proto tokens) (let ((IP-record (hash-table-ref/default IPv4-table addr #f))) (cond ((not (vector? IP-record)) ; addr is not in the table, this is a new entry (hash-table-set! IPv4-table addr (update-IP-record (make-IP-record) direction proto tokens))) (else ; addr is in the table, increment packets and add bytes (hash-table-set! IPv4-table addr (update-IP-record IP-record direction proto tokens))) Note that an IP record is a seven elements vector (i.e. created with make-vector). If I understand SRFI-69 correctly, hash-table-set! will replace a record with the same key. Is this correct? There cannot be duplicate keys, right? 3) This is how I dump the hash table. (define dump-data (lambda () (let* ((outport (open-output-file (make-dump-file-name))) (dump-IPv4-record (lambda (address IP-record) (write-with-indent (IPv4-address-string address) 1 outport) (dump-IP-protocols IP-record 1 outport (write-with-indent IPv4 0 outport) (hash-table-for-each IPv4-table dump-IPv4-record) ... (define IPv4-address-string (lambda (addr) (string-append (number-string (u8vector-ref addr 0)) . (number-string (u8vector-ref addr 1)) . (number-string (u8vector-ref addr 2)) . (number-string (u8vector-ref addr 3 This code displays two records with the same key and different data. This has happened more than once. I have kept the output files. If I call hash-table-set! with the same address as another record but in a different format (say a vector instead of a u8vector), would it choke or would it just create a new record without complaining? This would look like duplicate keys but they would be different. I assume that hash-table-for-each will present each key / record pair once and do so in some arbitrary order. Can I assume that dump-IPv4-record, when it calls IPv4-address-string, will choke on a key which is not a u8vector? I am looking for the mistake I made which is producing the illusion of a duplicate key in the hash table. I believe that confirming my assumptions is a good starting point. I hope this sort of question is not abusing the list members. Thank you for your patience. -- Claude Marinier ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] hash table questions
On Fri, Nov 23, 2012 at 02:19:10PM -0800, Kon Lovett wrote: On Nov 23, 2012, at 1:58 PM, Kevin Wortman kwort...@gmail.com wrote: Hi, This may or may not be helpful, but I'll add that, if it were me, I'd represent an IP address as a list of four fixnums rather than a u8vector. Then the default hash function will work out of the box, and many of your functions can be written more concisely. E.g. (define IPv4-addr= equal?) (define (IPv4-address-string a) (string-intersperse (map number-string a) .)) It's true that a u8vector will be a bit more space-efficient, but IMO it's wise to refrain from that level of optimization unless and until it's the only way to deal with an observed bottleneck. Normally I wouldn't disagree with the basic idea here, although I would advocate a vector rather than list. However the existing srfi-69 implementation doesn't follow a pair's references. I'm not sure I understand correctly what you mean, but there's a difference between eq?-hash and eqv?-hash versus equal?-hash: the latter descends into lists recursively while the former two just look at the pair directly. This is expected behavior, if you think it doesn't do this please provide an example where it goes wrong and file a bugreport. (Also I think there is a bug where list? beats pair? in the type discrimination.) Example + bugreport would be much appreciated here too. But vectors (structures are treated as vectors) and vector-like objects do recurse into the contents, at least for 4 levels. Same goes for lists. I don't know why you think 4 levels are treated specially, AFAIK they recur to any level. Cheers, Peter -- http://sjamaan.ath.cx -- The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music. -- Donald Knuth ___ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
