Re: [racket-users] Doing pattern matching by reader macro

2015-05-21 Thread Mianlai Zhou
Your answer is perfect. Thanks a lot! I sent you a private message already to have some further discussion. Mianlai On Thu, May 21, 2015 at 12:43 PM, Alexander D. Knauth alexan...@knauth.org wrote: Here’s one way to do something like that with a macro:

Re: [racket-users] Doing pattern matching by reader macro

2015-05-20 Thread Alexander D. Knauth
Here’s one way to do something like that with a macro: https://github.com/AlexKnauth/define-match-spread-out/blob/master/define-match-spread-out/main.rkt And using it: https://github.com/AlexKnauth/define-match-spread-out/blob/master/define-match-spread-out/tests/test.rkt On May 18, 2015, at

[racket-users] Doing pattern matching by reader macro

2015-05-18 Thread Mianlai Zhou
Hi Racketeers, I am a new user of Racket. I would want to be able to write the following segment of code: (define (f #t) 2) (define (f #f) 3) (define (f _) 0) My intention is to define a function f, such that given an argument #t it will produce 2, or in case given an argument #f it will

Re: [racket-users] Doing pattern matching by reader macro

2015-05-18 Thread Matthias Felleisen
#lang racket (define/match (f n) [(#t) 2] [(#f) 3] [(_) 0]) (list (f #t) (f #f) (f where's my homework)) On May 18, 2015, at 9:04 AM, Mianlai Zhou mianlai.resea...@gmail.com wrote: Hi Racketeers, I am a new user of Racket. I would want to be able to write the following segment

Re: [racket-users] Doing pattern matching by reader macro

2015-05-18 Thread Matthias Felleisen
Your best bet is to define a new language that overrides define after taking over the body of the module. This may even be an example in the docs. On May 18, 2015, at 9:39 AM, Mianlai Zhou mianlai.resea...@gmail.com wrote: Hi Matthias, Thanks for answer. However, this is not what I