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13:30 Lajla: Hmm, (let ('/) '3) actually evaluates to 1/3
13:30 Lajla: (let ('/) (quote 3)) does too
13:31 jonrafkind: because those are the same exact thing
13:31 jonrafkind: for some reason, let is applying the function that ('/) evaluates to, to its body
13:31 jonrafkind: -> (syntax->datum (expand '(let ('/) '3)))
13:31 jonrafkind: '(let-values (((quote) /)) (#%app quote '3))
13:32 Lajla: jonrafkind, yeah, I know.
13:32 Lajla: I just never really considered trying it.
13:33 Lajla: this is kind of the part where you expect a bug to kick in so that it doesn't work.
13:33 Lajla: The Scheme spec is also not extremely unambiguous about that it _must_ evaluate to to the same.
13:33 Lajla: All they say is that '<datum> is considered the same as (quote <datum>)
13:34 jonrafkind: right..
13:34 jonrafkind: so '3 is the same as (quote 3)
13:34 Lajla: Yeah, but also in let, like (let ('/) ...) is the same as (let ((quote /)) ...)
13:35 Lajla: The specs were not explictly that it's the same as (quote 3) as in the semantics of (quote 3) or just, a list whose first element is the symbol quote, and whose second element is 3.
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13:37 jonrafkind: ah it seems to bind quote to the operator, then apply quote to whatever the body evaluates to
13:38 jonrafkind: actually its rebinding qoute in (#%app quote '3)
13:38 jonrafkind: so its (#%app / '3)
13:38 jonrafkind: because let decosntructs hte  input, so it sees (quote /) and turns that into (let ([quote /]) '3)
13:39 Lajla: jonrafkind, I have no idea what you just said, can you rephrase it into directions like 'turn your click wheel right, then left, then right, then centre click'?
13:39 Lajla: jonrafkind, well, yeah, I imagined that.
13:39 Lajla: I think that it should
13:39 jonrafkind: i guess its technically correct, but thats extremely wierd behavior
13:39 Lajla: but what I'm saying is that R5RS is not extremely explicit and a bit ambiguous about it.
13:39 Lajla: Yeah.
13:39 Lajla: I like trying out these things to see if they work.
13:40 jonrafkind: heh
13:41 Lajla: I was just wondering if the 'x / (quote x) aequivalence was still in place if you changed the meaning of quote locally.
13:41 Lajla: But apprently it does, spot on job.
13:42 jonrafkind: yea, 'x is a reader level thing (in racket at least), so before any macro processing even occurs you get (quote x)
13:47 Lajla: Yeah, I had that idea.
13:47 Lajla: I'm not sure they wanted you to use (let ('3) ...) though to use that, but it's cool that it works.
13:47 Lajla: Handy for when I ever want to join obfuscated scheme contests
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15:50 Dranik: hi
15:50 Dranik: does racket support reader macros like in CL to change the language syntax?
15:51 jonrafkind: you acn change the reader in racket
15:52 chandler: Yes, though it works a little differently because Racket doesn't co-mingle phases.
15:52 jonrafkind: http://docs.racket-lang.org/reference/reader.html?q=reader#(idx._(gentag._203._(lib._scribblings/reference/reference..scrbl)))
15:52 Dranik: thanks
15:53 Dranik: and one more
15:53 chandler: You might also want to look at the documentation on creating languages, as that's the most useful way to expose a custom reader: http://docs.racket-lang.org/guide/languages.html
15:53 Dranik: oh, great!!
15:53 Dranik: thanks!!
15:54 Dranik: I've just launched DrRacket. It has asked me what language to choose. Which should I to use racket?
15:54 chandler: "Use the language declared in the source"
15:55 Dranik: ok. On macross: is it possible to develop a language which uses infix notation and does not use parenthesis?
15:56 Dranik: I mean if I need such a DSL
15:56 chandler: I'm not sure how to interpret that - "is it possible to create a language using Racket which has infix syntax", or "is it possible to create a language with infix syntax that supports macros".
15:56 chandler: The answer to both is "yes".
15:57 jonrafkind: Dranik, i am working on such a language
15:57 Dranik: Thanks, it was helpful!
15:57 Dranik: I guess I will give Racket a try!
15:58 Dranik: i tried Clojure but it was a bit limited with macros. Clojure does not allow changing syntax... :'-(
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16:37 Dranik: how is GUI enabled in racked? is it a racket on widget set or wxWidgets or something else?
16:37 Dranik: *racket own widgets
16:38 chandler: It's a forked version of wxWidgets.
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