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<beach>
In https://github.com/robert-strandh/Futhark, I define most functions to have a MUMBLE-CORE function without keyword arguments (for the benefit of a compiler macro). This MUMBLE-CORE function usually calls STRING, twice if it is a comparison function. But I define STRING as a generic function. Perhaps I should instead define the MUMBLE-CORE functions to be generic?
<ixelp>
GitHub - robert-strandh/Futhark: Implementation of the Common Lisp Strings dictionary
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<beach>
Then I could also avoid the CHECK-TYPE calls in the NSTRING-... functions.
<beach>
Any opinions?
<beach>
The other advantage of a generic function is that client code could then be allowed to define methods on those functions, for example if it has some more efficient way of working with BASE-STRINGs.
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* beach
vanishes for 2 hours or so, and will read any remarks when he gets back.
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<beach>
OK, so perhaps nobody has opinions about this, but perhaps some have questions?
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<splittist>
Perhaps we're wondering why you have a function about a naturalistic movie style (mumblecore).
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<splittist>
So you're asking if, instead of having WITH-CANONICALIZED-AND-CHECKED-STRINGS calling STRING twice to feed to CHECK-BOUNDING-INDICES, this last should be generic?
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<beach>
I am suggesting that the -CORE function could be generic.
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<beach>
Checking the bounding indices can't be done entirely by a generic function, because it has to check the values as well as the type. But I could include specialization for the types in the generic function. Like I could specialize to NULL for the END parameter.
<beach>
There would be a fairly large number of methods, but they could all be generated by a macro to be used by all comparison functions.
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<scymtym>
didn't heisig already come up with something like that for the sequence functions based on fast-generic-functions?
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<beach>
The sequence functions heisig wrote are generic, yes. I am not sure there is anything else to come up with here. Am I missing something?
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<scymtym>
at the moment, your -core function is inlinable. without extra steps, using a generic function instead would lose that property. i mentioned heisig's approach because he managed to have both at the same time if i remember correctly
<ixelp>
Consecution/Code/substitute-if-not.lisp at master · s-expressionists/Consecution · GitHub
<beach>
Like the part about sealing? Sure.
<scymtym>
there is no specialization for the start and end parameters, but the code does use fast-generic-functions instead of normal inlining
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<beach>
I gave that some thought, and I convinced myself that the execution time for any of these functions would be dominated by the essential work it does, rather than by the overhead of calling them, even when inlining could provide type information from the context of the caller.
<beach>
But, of course, programmers are notoriously bad at guessing things like that.
<scymtym>
i would probably put it like that: since sequence functions and some of the string functions are very similar, shouldn't the same iplementation strategy be ideal for both?
<beach>
Sounds right.
<beach>
Though the sequence functions specialize to each vector available vector class.
<beach>
* to each available vector class.
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<beach>
Thanks for the remarks. I think I'll leave the Futhark implementation as it is for now. And perhaps I'll refresh my memory about fast-generic-functions to see whether they can be used for Futhark.
<scymtym>
right. the number subclasses of string should be much smaller. at most the product of simple vs. not-simple and base-character vs character, i think
<beach>
Yes.
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<bike>
there's also nil arrays if you have those.
<beach>
Indeed.
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* younder
takes note of 'fat generic functions'
<younder>
fast
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<phoe>
;; TODO: make the array adjustable for the chance to put on weight
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<yottabyte>
kagevf: I tried running the executable in an administrative powershell, still a no go
<yottabyte>
I'm wondering if it has something to do with my variable for my database: (defvar *db* (sqlite:connect #P"../../all-plus.db"))
<yottabyte>
it's a relative path... and in slime, maybe this works, but when I have the executable, I don't have a relative path to the function that's running that's using this variable? not sure how that works
<yottabyte>
I could add an explicit path in a properties file perhaps
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<kagevf>
yottabyte: that sounds like a good idea ... you could even use an absolute path as a test just to see if that fixes it, then come up with a solution that will work from any directory. I'm not sure if you can do something like #P"/root/whatever/all-plus.db" with pathnames? if it doesn't work, maybe just try a normal string without using a pathname literal.
<kagevf>
a lot of libraries and implementations seem to be pretty forgiving if you use a string instead of a pathname, but I don't know what the limits are to that "forgiveness" hehe
<phoe>
kagevf: oh, I meant the second part - you talking about "a string instead of a pathname"
<BrokenCog>
question ... when executing this function: https://termbin.com/c64p ... I get a warning: "(OPEN FN ..." undefined varaible FN ... but ... isn't it just defined via defparameter?
<phoe>
DEFPARAMETER defines a global dynamic variable, whereas you want a lexical one
<BrokenCog>
phoe: that makes sense, but, the warning is still within the same scope of the defparameter isn't it?
<BrokenCog>
which is why I don't understand it being "undefined"
<BrokenCog>
the scope of the defparameter in this case is the (defun), no?
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<bike>
BrokenCog: you get the warning when the defun is compiled, not when it's loaded shortly thereafter
<bike>
BrokenCog: the compiler does not figure out that defparameter is defining a variable, so when it gets to compiling the with-open-file form it is still unaware that fn will be a variable
<phoe>
BrokenCog: DEFPARAMETER, when it is not a toplevel form, defines the global variable when it is executed, so at run-time, but the compiler issues the warning about an unknown variable at compile-time; if you extract that DEFPARAMETER outside your DEFUN and put it at the toplevel the warning will go away
<kagevf>
phoe: ok, good to know, thank you
<phoe>
sure, at runtime it's all coming together anyway, but the compilation stage happens before execution, so a warning is produced
<phoe>
kagevf: np
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<BrokenCog>
okay .. thanks for the explanation. that makes more sense.
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<phoe>
basically, if you want local variables, use LET and LET* and friends, such as DESTRUCTURING-BIND, MULTIPLE-VALUE-BIND and even LAMBDA for function arguments (which are variables too)
<phoe>
DEFPARAMETER and DEFVAR and DEFCONSTANT are for globals
<phoe>
;; FYI, if you're learning lisp and this channel is busy with other chat while you have a question, #clschool also exists
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<BrokenCog>
thanks.
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<cpli>
awawa, is there at this point some macro that unifies all the weird `with-*` macros?
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