<hashfunc569>
i'm having trouble with UIOP:WITH-TEMPORARY-FILE. i want to WRITE something to the file. then i want to UIOP:READ-FILE-STRING. but when i UIOP:READ-FILE-STRING, i get an empty string "". here's the minimal reproducible example:
<hashfunc569>
(uiop:with-temporary-file (:stream s :pathname p :keep t) (write 'yo :stream s) (uiop:read-file-string (namestring p)))
<markasoftware>
Need to flush it maybe
<markasoftware>
Try (finish-output s) before read
<jmes>
pjb: Thanks, it's not exactly what I'm looking for, but I've been exploring some options.
<Xach>
hashfunc569: out of curiosity, why are you using an intermediary temporary file?
<jmes>
Question: how can I have name conflicts with COMMON-LISP when I don't :USE it in my DEFPACKAGE form? Details here https://dpaste.com/HETRVSJPS
<etimmons>
hashfunc569: using an intermediate file does seem weird. But I think adding :close-stream after you write should fix it (assuming you no longer want to write to the stream)
<Guest74>
jmes: seems cl+qt is exactly that.
<Guest74>
oops, misread.
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<Xach>
jmes: looks weird to me. i don't see an obvious reason in what you shared.
<jmes>
I restarted my lisp image and it works. I think it was because I was using COMMON-LISP in the previous DEFPACKAGE, then I fixed it and tried to re-run QL:QUICKLOAD but that remembered the old symbols
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<Xach>
ah. delete-package can help there.
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<hashfunc569>
markasoftware: ok i'll give that a go when i get back
<hashfunc569>
Xach: the cli tool that i'm using requires that i use a file & i reallyyy don't feel like learning a new library. i'm just gonna use this approach to get it up-and-running, and then i'll refactor the code and whatnot
<hashfunc569>
etimmons: i tried adding :close-stream earlier and to no avail, but i'll try again when i get back
<jmes>
Xach: ty, I didn't know about delete-package
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<hashfunc569>
markasoftware: etimmons: (FINISH-OUTPUT s) and :CLOSE-STREAM both work after i'm done writing to the stream. thanks
<char[m]>
Is there some rules about what macros can expand into? Are there certain macros that are not allowed to expand into implementation specific functions?
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<Bike>
there are not really any general rules about what standard macros expand into, if that's what you're asking
<Bike>
sometimes it's defined that a macro expansion involves a call to some function, as with the MOP macros for example, but that's not a guarantee that the function call is directly in the expansion; e.g. sbcl's defclass expands into a call to something like load-defclass, which is a function that calls ensure-class as specified
<char[m]>
Just to clarify, I am talking about only macros defined in ansi. the load-class you refer to is implementation specific.
<char[m]>
s/load-class/load-defclass/
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<Bike>
yes, but i mean, defclass is part of ansi
<Bike>
and it can expand into load-defclass, which is not, even though mop defines that the expansion of defclass needs to call the generic function ensure-class
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<hashfunc569>
how can transform everything in a form like how MAPCAR does, but instead for a tree?
<hashfunc569>
i've tried SUBST-IF but it doesn't give me access to the form itself
<hashfunc569>
or does it?
<Bike>
what form?
<hashfunc569>
i think an example is better suited for this question
<hashfunc569>
is there a function that does do that?
<Bike>
not in the standard
<hashfunc569>
so there isn't like a MAPCAR equivalent for trees?
<Bike>
no. and it would have to be a bit more complicated, since you don't want to substitute everything
<Bike>
since you have the test, and separately, the transformation
<hashfunc569>
there has to be something simple available
<hashfunc569>
or a simple strategy
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<hashfunc569>
all i can think of is using a recursive mapcar
<Oladon>
I'm attempting to override a defsetf from another package, and it works when I manually evaluate it in SLIME, but not when I quickload the package -- anyone have any ideas as to what I might be missing?
<hashfunc569>
is there any way to iterator over a tree
<markasoftware>
Not in the standard.
<hashfunc569>
markasoftware: but subst essentially does it
<markasoftware>
Oh interesting
<Bike>
(defun maptree (function test tree &key (key #'identity)) (cond ((funcall test (funcall key tree)) (funcall function tree)) ((consp tree) (cons (maptree function test (car tree) :key key) (maptree function test (cdr tree) :key key))) (t tree)))
<hashfunc569>
Bike: thanks, i'll probably use that if i can't figure out how to mold subst to the way i need it
<hashfunc569>
SUBST is clearly accessing the elements, because it can compare the elements
<hashfunc569>
all i want is the element that SUBST is currently looking at
<Bike>
you cannot do what you want with subst
<Bike>
Oladon: not sure i understand what you're doing, but maybe the problem is a symbol being read in a different package than what you expect?
<hashfunc569>
Bike: truth
<Oladon>
Bike: Hmm... I've in-package'd to the package of the original defsetf, but perhaps you're on to something... I'd assumed #:package the same as :package, but is it not?
<Bike>
it is the same for your purpose
<Oladon>
Hrm.
<Bike>
so what's the scenario here? you have a system that includes a setf definition that overrides a setf definition in another system?
<Oladon>
Correct -- I'm overriding hunchentoot's session-value setf with my own.
<Oladon>
(I suspect it's an ugly thing to do and that I'm doing it in an ugly way, but I'll deal with that later)
<Bike>
maybe the problem has to do with recompiling hunchentoot? if you're using defsetf, you will have to recompile any previously compiled (setf (session-value ...) ...) to put the new definition in
<Oladon>
Hmm...
<Oladon>
I didn't realize that, but it makes sense... let's see...
<Oladon>
That doesn't seem like the issue... the setf comes after the definition (same file)
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<Oladon>
The thing that's weird to me though is that if I run a setf in the SLIME REPL, it calls my override... but if I just quickload the package (still in SLIME) and call an applicable method through localhost, it'll still run Hunchentoot's default one
<Bike>
that really sounds like there's an old setf form that needs recompilation
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<Oladon>
It does, doesn't it...
<Oladon>
hrm.
<Oladon>
Is there a way to specify in my asd that a particular package dependency should be recompiled after a component is loaded?
<Oladon>
Or what would be the best way to handle that?
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<contrapunctus>
Uhm...I'm trying to help a first-time programmer install SBCL on their Windows machine.
<contrapunctus>
Ah, they had accidentally installed the source tarball rather than the MSI installer.
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<contrapunctus>
s/installed/downloaded/
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<gin>
learning hunchentoot from http://edicl.github.io/hunchentoot/ . how does the function header-in* name &optional request => header avoid race condition? if two requests lands very close to each other, wouldn't the header-in* call while handling the first request end up reading the headers of the second request?
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<semz>
gin: You should probably read up on dynamic variables. Hunchentoot (likely) rebinds *request* with (let ((*request* ...)) ...) for each handler. The rebindings for different requests don't observe each other.
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<gin>
semz: thanks
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<mayuresh>
hello. :)
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<drbluefall>
' ')/
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<beach>
drbluefall: Are you new here? I don't recognize your nick. And I completely failed to interpret your message.
<drbluefall>
I've been lurking for a while, and it's a wave!
<beach>
Ah, got it!
<beach>
So, welcome!
<drbluefall>
danke ^~^
* drbluefall
goes back to searching for a half-decent mysql lib
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<yitzi>
5
<drbluefall>
can't seem to figure out how to define a root route with snooze...
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<drbluefall>
either it's painfully obvious and I'm missing it or it's not possible
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<jmercouris>
yitzi: of course I can write a function, just don’t want to reinvent the wheel for my codebase if there is some sort of “idiomatic” example
<jmercouris>
jackdaniel: perhaps this is the way
<Bike>
if the wheel is simple enough it can be faster to reinvent it than to find an existing one
<Bike>
or something. metaphor: overextended
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<yitzi>
I would argue that writing your own simple "wheels" is idiomatic in CL versus including bloated libraries that attempt to solve all problems but end up doing it badly ... IMHO.
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<jackdaniel>
yitzi: I second that opinion :)
<jackdaniel>
jmercouris: you are perhaps welcome ,)
<yitzi>
jackdaniel: consider the motion passed! ;)
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<Oladon>
drbluefall: What're you trying to do with a root route? I just append to *api-dispatch-table* for my root route.
<Oladon>
Or you may be able to get by just by setting snooze:*home-resource*
<drbluefall>
I'm just trying to get my bearings
<Oladon>
Gotcha
<Oladon>
I can show you an example from mine if you'd like
<drbluefall>
My language before this was Rust, and I used a lot of actix-web
<yitzi>
Or if you use quicklisp then you can put your project in `~/quicklisp/local-projects/` ... I personally make config file `~/.config/common-lisp/source-registry.conf` and put something like this in it https://plaster.tymoon.eu/view/2984#2984
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<christos>
yitzi I am looking through the asdf docs but I can't find anything
<christos>
(regarding how to check the asdf configuration)