On Tuesday, May 2, 2017 at 2:03:23 AM UTC+8, Jens Axel Søgaard wrote: > I recommend you change your representation to structures. > > > See new answer: > > > http://stackoverflow.com/a/43723966/23567 > > > > /Jens Axel > > > > > > > 2017-05-01 19:03 GMT+02:00 <circul...@gmail.com>: > I posted this question on stackoverflow but have not found an answer yet. > https://stackoverflow.com/questions/43476080/self-evaluting-racket-interpreter > > > > I've been trying to write a Racket interpreter that can interpret itself. > > > > interpreter.rkt contains the code for the interpreter. It is pretty standard. > Then, in interpreter-self-evaluate.rkt, I > > 1. import interpreter.rkt, > > 2. copy paste the code from interpreter.rkt and > > 3. evaluate the code using the eeval function defined in interpreter.rkt. > > > > However, this returns an error "; mcdr: contract violation". I suspect that > the problem is in interpreter-self-evaluate.rkt and that it might have > something to do with how quote works. I might be completely off base though. > Any ideas? > > > > -- > > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users...@googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > -- > Jens Axel Søgaard
I am somewhat reluctant to use structures as I want to keep the interpreter as minimal as possible. Also, I'm not familiar enough with the semantics of frames to implement it in interpreter.rkt. With regards to mcons being different from cons, Oscar Lopez has suggested that in stackoverflow. So, I re-implemented the interpreter in r5rs so that set-car! and set-cdr! are available and I wouldn't need to use mcons. I've attached the files here. I still got an error ; application: not a procedure; ; expected a procedure that can be applied to arguments ; given: (mcons 'expr (mcons 'env)) ; arguments...: [none] It looks like it still has something to do with mcons. I suspect that this might have something to do with Racket's implementation of r5rs? Again, this might be completely wrong but I don't know how to determine the cause. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
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