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02:33 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/ic_X1g
02:33 RacketCommitBot: [racket/master] Improve contract generation in Typed Racket. - Sam Tobin-Hochstadt
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10:56 ianjneu: hello hello
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10:58 noelw: hi
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12:26 MightyFoo: night all
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14:09 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/GAwXRQ
14:09 RacketCommitBot: [racket/master] Flvectors and Fxvectors are higher-order if we give them restricted float types. - Sam Tobin-Hochstadt
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14:45 jonrafkind: hm, for some reason I thought 'raco expand x.rkt' would show me the variable renamings resulting from macro expansion
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16:30 dyoo: has anyone here played with llvm or enscripten?
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16:47 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/Zld9kw
16:47 RacketCommitBot: [racket/master] fixing PR13210 - Jay McCarthy
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17:26 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/41Btdg
17:26 RacketCommitBot: [racket/master] second attempt at removing reliance on tcp. available has been greatly simplified because it relied on the behavior the thread.rktl test is actually testing - Jay McCarthy
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17:27 dyoo: stupid question: bound-identifier=?: is it useful for anything besides syntax that's already been expanded?
17:27 dyoo: that is, it's useless for unexpanded syntax, right?
17:29 jonrafkind: well I guess it would tell you if pattern variables bind certain things
17:32 jonrafkind: i mean if two pattern variables are bound-identifier=? then you know they have the same name and same hygienic marks
17:41 dyoo: I guess what I mean is that https://gist.github.com/3961723 is telling me that what I expected bound-identifier=? to do, being able to distinguish shadowing and binding, is only possible after expansion, because before that point, no binding information has been computed yet
17:43 jonrafkind: hm so there x is bound-identifier=? but should not be free-identifier=?
17:43 jonrafkind: is free-identifier=? saying #t?
17:43 jonrafkind: i would imagine both are #t
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18:04 carleastlund: dyoo, once syntax is fully expanded, bound-identifier=? and free-identifier=? are the same.  And of course before any expansion, both are just eq? on the symbol.  They're only useful mid-expansion, and serve different purposes.
18:05 carleastlund: jonrafkind, and I'm pretty sure anything bound-identifier=? should also be free-identifier=?, the bound-... version is supposed to be the stricter of the two.
18:07 carleastlund: Of course actual Racket expansion is never quite as simple as the model in my head, there may be some corner cases I'm not accounting for.  But in general, I would only use free-identifier=? on fully expanded code.  bound-identifier=? is generally used for almost-ready-to-be-bound identifiers (i.e. names being bound by the current form under expansion).
18:08 dyoo: hmmmm.
18:12 jonrafkind: hm, i have to think about it..
18:12 jonrafkind: if there are any cases when they are different
18:14 carleastlund: jonrafkind, there aren't in the Dybvig model, I'm pretty sure, but I think there are weird cases in Racket model with internal definition contexts that mess up bound-identifier=?, so if that makes things go crazy I won't be totally surprised.
18:14 jonrafkind: ah
18:14 jonrafkind: oki found a case already
18:14 carleastlund: haha
18:14 carleastlund: Well that was sure fast.
18:15 jonrafkind: https://gist.github.com/3961884
18:15 jonrafkind: its because the argument is marked so it cant be bound identifier=
18:15 jonrafkind: but they both reference the global x to begin with so they are free identifier=
18:16 carleastlund: Oh, wait, but that's the way that works fine -- free=? but not bound=?.  It's the other way I'm saying shouldn't happen.  Above you said something was bound=? but not free=?.
18:16 jonrafkind: oh i see
18:17 jonrafkind: i think likely you are right
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19:21 chandler: Hm. It seems like the way that `ffi-callback' allocates the ffi closure is wrong on non-JIT platforms. `scheme_malloc_code' tries to make sure that the returned page is executable if you have JIT, but otherwise just calls malloc, which might not work at all.
19:26 jonrafkind: what should it do
19:27 chandler: There's actually a libffi function `ffi_closure_alloc' which is supposed to do whatever is necessary to make this work on your platform.
19:29 jonrafkind: sounds reasonable
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22:50 RacketCommitBot: [racket] plt pushed 4 new commits to master: http://git.io/CVbh8w
22:50 RacketCommitBot: [racket/master] add logging to mred's event callback mechanism to record - Robby Findler
22:50 RacketCommitBot: [racket/master] add some first-cut logging information to drracket - Robby Findler
22:50 RacketCommitBot: [racket/master] Adjust online check syntax's trace replay code so that it: - Robby Findler
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