June 2008 - erlang-in-lisp-devel@lists.common-lisp.net

[erlang-in-lisp-devel] Hi, I'm here to help
by Wesley Bitomski 11 Jun '08

11 Jun '08

I'm Wesley and I have experience writing code. Although my style may not be refined, I'm tenacious. I've read what's going on, so on a macro-level I understand what you're aiming to accomplish. Since I'm new to your project, I'm hesitant to start acting on my own. Is there anything specific that you want me to start working on? Test cases? Documentation? Beating up on a frustrating problem? Also: What implementation are each of you running? I have a machine that runs emacs slime with clisp. Does this matter, or should I be using something else? Thanks for having me, I found out about the project through Facebook, and was asked to join this group by Mr. Rideau to start participating. ~Wesley

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Re: [erlang-in-lisp-devel] fare-match question
by Robert Virding 07 Jun '08

07 Jun '08

Hello all, The presentation is delayed as it is so big it needs approval by the list master. Sorry about that. Robert 2008/6/1 Robert Virding <rvirding(a)gmail.com>: > The LFE presentation. > > Robert > >

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[erlang-in-lisp-devel] A good name for an operator
by Robert Virding 02 Jun '08

02 Jun '08

This list is probably a good place to ask for help with this: In LFE (Lisp Flavoured Erlang) I have extended cond with a matching test. Today you can do (cond ((match <pat> <expr>) ...) ...) You evaluate the expression and if the result matches the pattern then the test succeeds and all the variables in the pattern are bound and can be used in that body. This is easy to implement and suits a pattern matching style of programming. The question is what to call the operator? I think using 'match', while descriptive, is way too general and can easily be expanded by a macro. I had thought of '=?' which builds on Erlang assignment '=' and a test '?', but maybe it is too Erlangy. Any suggestions welcome. Just an small observation: now that I am directly working with lisp and erlang at the same time is that have pattern matching really affects your style or programming. I know it is obvious but it still hits you when you see it. Robert

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[erlang-in-lisp-devel] fare-match question
by Matt Bone 01 Jun '08

01 Jun '08

This is not a huge deal, and probably a bit out of the order we discussed. I started thinking about pattern matching yesterday, though, and I was trying to do the simple example in fare-matcher (a simple modification of what's in the docs): (defun test-match (param) (fare-matcher:match param (:ping (print :pong)) (:quit (print :bye)) ((:add a b) (print :add)))) Matching with the simple symbols ping and quit works just fine, but things go south when trying to match with add and bind a and b. I was attempting to do: (test-match '(:add 1 2)) But something is wrong in the macroexpansion. Am I even using my test-match function properly? Does match handle quoted sexpr properly or was I just masking this problem with :ping and :quit by handing it symbols that evaluate to themselves? Also, since I believe both authors are on the list, should I consider using cl-match instead? Or are our pattern matching requirements so minimal that a) it does not matter and b) we could even roll our own ala some of the Norvig examples? --matt

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