allegro-cl archives 1998-4-10 | home index prev H thread-prev K thread-next J next L |
From: Roy Turner Subject: Re: Linux version of ACL, 4.3 problems Date: 1998-4-10 8:38 cjc9024> First, (subseq "HellO" 0 7) will return "HELLO<GARBAGe>"!!! cjc9024> Where GARBAGE appears to be random noise in the computer's memory! cjc9024> This should never happen in LISP! You see stuff like this in C, but cjc9024> Lisp's run time type checking should make sure this never occurs - it cjc9024> should throw an error (see CLTL2) This seems to be the case in ACL 4.3 for Unix, too. This is all I see about subseq in CLtL2 (the on-line version, that is -- students have borrowed all my copies!) [Function] subseq sequence start &optional end This returns the subsequence of sequence specified by start and end. subseq always allocates a new sequence for a result; it never shares storage with an old sequence. The result subsequence is always of the same type as the argument sequence. setf may be used with subseq to destructively replace a subsequence with a sequence of new values; see also replace. You're probably referring to the section starting with: X3J13 voted in June 1988 (SUBSEQ-OUT-OF-BOUNDS) (and further clarification was voted in January 1989 (RANGE-OF-START-AND-END-PARAMETERS) ) to specify that these rules apply not only to all built-in functions that have keyword parameters named :start, :start1, :start2, :end, :end1, or :end2 but also to functions such as subseq that take required or optional parameters that are documented as being named start or end. Does ACL 4.3 Unix/Linux implement all the X3J13 suggestions? Are those part of the ANSI standard? cjc9024> function makes use of reduce with a :key argument, but ACL's reduce cjc9024> does not know about the :key keyword argument! Strange -- ACL 4.3 on Unix knows about it... cjc9024> With both packages, I have all kinds of trouble getting them to make. cjc9024> The odd thing is, STARSIM defines a read macro that controls whether cjc9024> this code will be modified for ACL! MAXIMA is written for Kyoto CL, cjc9024> and not knowing the differneces between those two dialects, I can't cjc9024> seem to convert it. I plan on getting a real Symbolics account cjc9024> to use over the net, so that I can make use of the #+Symbolics cjc9024> read macros that are in those sources... This sounds more like a problem with your software setup packages than with ACL. cjc9024> The emacs lisp files that come with ACL are pretty nice, but the cjc9024> indentation routines are not canonical; when doing an if form, the two cjc9024> possible conditions that come after the test are not lined up cjc9024> properly. I see something similar with a setf with a multiple number cjc9024> of setting forms. And the annoying thing is, if I indent those cjc9024> forms in the style of Lisp, after I hit newline, the stupid emacslisp cjc9024> program REINDENTS them the WRONG way!!! You can customize this behavior to suit yourself. See the documentation for the function fi::lisp-indent-struct, in file fi-indent.el. cjc9024> How do I open up more than one lisp listener? After cjc9024> fi:common-lisp cjc9024> I can do cjc9024> fi:open-lisp-listener cjc9024> cjc9024> but any subsequent invocations of that command only bring me to the cjc9024> second lisp listener. I can't seem to get more than 2 at a time... Give a numeric argument (M-3 M-x fi:open-lisp-listener) to get new ones; m-3 will open a third one, m-4...etc. cjc9024> Other than that , I enjoy the product, and wish that I could afford cjc9024> the full version. I like the fact that I can use sockets and regexps cjc9024> like I am used to with unix, shell scripting. Very nice. And the cjc9024> threading concept is new to me, I realize there are threads in cjc9024> Solaris, C, etc, but don't understand how to use them yet. Is there a cjc9024> guide to this or a tutorial somewhere? I wish that we *could* buy the full product for Linux. Maybe if enough of us use the free version and request a (commercial) full version be made available... --Roy ------- Roy M. Turner, Assistant Professor () E-mail: <umcs.maine.edu at rmt> Department of Computer Science () WWW: http://cdps.umcs.maine.edu/~rmt 5752 Neville Hall () Phone: (207)581-3909 University of Maine () FAX: (207)581-4977 Orono, ME 04469-5752 () I use Lisp because I know C, C++, Ada,... |
(
1
CoRey /
Linux version of ACL, 4.3 problems
4/9
)
(
2
Daniel Solaz/
...
4/10
)
(
3
Alex Athanasopoulos /
...
4/13
)
(
4
Daniel Solaz/
...
4/13
)
(
5
CoRey /
...
4/11
)
(
6
Arthur Flatau /
...
4/12
)
(
7
Kenneth D. Forbus/
...
4/12
)
(
8
Arthur Flatau /
...
4/10
)
(
9
Erik Naggum /
...
4/10
)
(
10
Roy Turner /
...
4/10
)
(
11
Erik Naggum /
...
4/10
)
(
12
Roy Turner /
...
4/10
)
(
13
Erik Naggum /
...
4/10
)
(
14
Erik Naggum /
...
4/9
)
|