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<pve>
Hi! In a call to a function, such as (make-foo :a 1 :b 2), is it correct to call the ":a 1 :b 2" part (including the keywords) the "arguments"?
<pve>
and "1" and "2" the "parameters"?
<pve>
sorry if this is too elementary
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<phoe>
these are commonly called keyword parameters
<phoe>
the CLHS also calls them that way
<phoe>
as in, everything after &key is keyword parameters, except for any &allow-other-keys
<beach>
phoe: But these are the argument.
<beach>
Not the parameters.
<beach>
It's a call, not a definition.
<phoe>
oh! sorry
* phoe
re-reads 3.4.1.4
<beach>
pve: I think "keyword arguments" is fine. If you want to be more specific, you could say "keyword-argument pairs".
<beach>
pve: Notice, however, that you can't tell from a call whether they are keyword arguments.
<beach>
pve: For example: (list :a 1 :b 2) is a fine call, but they are not keyword arguments.
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<pve>
beach: great, thanks
<pve>
phoe: ^
<beach>
pve: Conversely, in something like (bla 'a 1 'b 2) they can very well be keyword arguments.
<pve>
beach: in (list :a 1 :b 2) they're just "arguments"?
<beach>
Yeah.
<pve>
ok, thank you
<beach>
Also try (defun f (x &key ((a y))) (list x y)) then (f 234 'a 33)
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* pve
tries
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<no-defun-allowed>
One too many parens around (a y)?
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<beach>
I don't think so. Did I do it wrong?
<no-defun-allowed>
Well, that works -- I haven't seen that before.
<beach>
(a y) would be the variable a with a default value of y.
<no-defun-allowed>
Indeed.
<beach>
This means the variable y to be recognized by the keyword a.
<beach>
The glossary entry for "parameter" distinguishes between "parameter" and "argument".
<pve>
beach: hmm, I think I need to read the spec for that one.. my first reaction was also, "looks like one pair of parens too many"
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<pve>
beach: ok, I think I understand now
<pve>
it's a way to have a keyword parameter that is not given with a keyword symbol
<scymtym>
it could still be a keyword but not the default one derived from the variable name
<pve>
right
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<beach>
no-defun-allowed: You haven't seen it because you haven't attempted to implement lambda-list parsing. :)
<pve>
and reading the above again, beach did say it, but I just couldn't parse it
<scymtym>
which is probably the more common use-case because it let's you chose the keyword parameter name in a way that maintains the "external interface" but bind the passed argument to an unrelatedly named variable
<no-defun-allowed>
beach: That is quite possible :)
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<_death>
one use for it is to bind to a special variable without an explicit let
<_death>
another is for CL names that can't be bound
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<radiohead_fan>
has anybody ever worked with cl-tcod?
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<Xach>
radiohead_fan: i have worked to get it to build on my system, but never actually used it
<radiohead_fan>
damn.... i need help with using it
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<no-defun-allowed>
radiohead_fan: Do you really like True Stories that much? I thought it was generally considered to be Talking Heads' worst album.
<no-defun-allowed>
Joking aside, what's it do? It looks like you use it to make roguelike games.
<radiohead_fan>
yeah its for roguelikes
<radiohead_fan>
wanted to make a very small roguelike for this halloween
<no-defun-allowed>
I see.
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<radiohead_fan>
everything was going fine but when i was coding the part of the key input i found no way of making a key exit and close the window, ive even tried other methods (from various tutorials) and they just dont seem to work
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<VincentVega>
guys, any way to extract a range of bits from a fixnum?