dietz's articles:

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Constituent characters with constituent trait 'invalid' -- multiple escape ok? 8 35 (1/2/2005 5:15:40 PM) comp.lang.lisp In the CL standard, constituent characters with constituent trait invalid are described by (2.1.4.3): Characters with the constituent trait invalid cannot ever appear in a token except under the control ... Paul

Poplog common lisp meets the gcl random tester 8 32 (10/22/2004 11:55:57 AM) comp.lang.lisp Prompted by Aaron Sloman's recent message, I downloaded poplog 15.53 and installed it on my x86 linux box. I've been working on a conformance test suite for ANSI Common Lisp (presently containing over 18,000 t... Paul

Question about symbol printing 0 42 (4/19/2004 12:09:56 AM) comp.lang.lisp According to 22.1.3.3, when *print-escape* is bound to true, When printing a symbol, the printer inserts enough single escape and/or multiple escape characters (backslashes and/or vertical-bars) so tha... Paul

(prin1 #\Space) 1 28 (3/6/2004 11:11:26 PM) comp.lang.lisp According to CLtS, section 22.1.3.2: (in discussing printing of characters when printer escaping is enabled) For the graphic standard characters, the character itself is always used for printing in #\... Paul

(CLtS question) Pathname hosts 218 26 (12/6/2003 5:31:43 PM) comp.lang.lisp On the page for the PATHNAME-HOST function, the function is defined as returning a 'valid pathname host'. In the glossary, this type is defined to be a string, a list of strings, the symbol :unspecific, or a s... Paul

Similarity on circular data structures 1 39 (11/29/2003 8:21:59 AM) comp.lang.lisp Section 3.2.4.2.2 defines the 'similarity' relation on various data structures. For CONS objects, the definition is: Two conses, S and C, are similar if the car[2] of S is similar to the car[2] of C, an... Paul

LOOP for-as-arithmetic clauses: do they allow NIL as a d-var-spec? 0 22 (10/17/2003 12:54:29 PM) comp.lang.lisp The syntax of LOOP says the variable in a for-as-arithmetic clause is a d-var-spec, not a simple-var. Destructuring only makes sense there if the d-var-spec is NIL, meaning don't bind a variable. Is this expe... Paul

ASH bug in sbcl 0.8.3.86 0 39 (9/22/2003 7:31:24 PM) comp.lang.lisp * (ash -1000000000000 -100000000000000000000) 0 (should be -1) Paul ... Paul

IMAGPART on negative floats 4 26 (9/9/2003 11:14:40 PM) comp.lang.lisp Here's another question about the standard... According to the page for IMAGPART: realpart and imagpart return the real and imaginary parts of number respectively. If number is real, then realpart retur... Paul

(upgraded-complex-part-type 'rational) ==> ? 3 33 (8/2/2003 5:57:41 PM) comp.lang.lisp Is it required by ANSI CL that (upgraded-complex-part-type 'rational) be type-equivalent to rational? If so, where does it say that in the standard? Paul ... Paul

dietz's replies:

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defvar / defconstant 4 30 (12/4/2005 6:26:15 PM) comp.lang.lisp Hello, I just began to learn Common Lisp, and as you can imagine I've got some questions. What is the difference between defvar and defconstant ? Both defines a name/value that cannot be changed... Am I wrong... leissing (2)

Sbcl repeatedly giving me optimization messages at runtime. 1 47 (12/16/2005 11:22:28 PM) comp.lang.lisp My IFS Designer application was just being tested with sbcl and there's a problem. It would seem that for every point I draw to the sdl:surface sbcl warns me about an optimization note regarding sdl:event-loop.... charlie.burrows (55)

Failing projects 11 17 (4/24/2006 7:53:09 PM) comp.software-eng Hello, I am working on an a very large (12+ developers plus testers etc approx 500, 000 lines of code) real time embedded software project which is way overdue and also we cant seem to get down to a point wh... paul4122 (2)

CMUCL compile failure: "NIL is not of type C::CONTINUATION" 3 30 (5/24/2006 10:44:37 AM) comp.lang.lisp Hi all, At (declaim (optimize (safety 3))), the following code breaks in compile under CMUCL. It works fine in SBCL 0.8.16. I'm using Debian stable, cmucl is version 19a-release-20040728-11 . I get the same... kevinl1 (7)

Relative merits of Lisp-1 vs. Lisp-2? 72 28 (5/30/2006 9:33:31 PM) comp.lang.lisp What are the relative merits of a Lisp-1 (one namespace for both functions and variable) versus a Lisp-2 (one namespace for functions, and one for variables)? I can think of the following: For Lisp-1: * No #'... JesusWaffle (10)

Amazon used lisp & C exclusively? 766 194 (7/8/2006 12:58:28 PM) comp.lang.lisp http://www.cabochon.com/~stevey/blog-rants/tour-de-babel.html But sadly they don't have any more openings for lisp. http://tinyurl.com/zaewf What other major companies have posts for lisp? Alok ... alok.bisani (55)

Theories on why Lisp source *seems* to have less comments? 77 29 (7/21/2006 10:09:37 PM) comp.lang.lisp I've found this to be the case in much of the code I've read. Here are my theories on why: 1. Lisp programmers are too busy solving complex problems to document their code. 2. Lisp is so powerful it makes pr... j_mckitrick (424)

iterative-version for computing a Fibonacci number 32 40 (7/22/2006 12:09:49 PM) comp.lang.lisp hai guys, i came across "Project Euler" while i was searching for some problems to work on. i find a problem related to Fibonacci numbers. Statement:-- Find the sum of all the even terms in the Fibonacci seq... arnuld3 (358)

setf at runtime 5 23 (11/25/2005 2:50:15 PM) comp.lang.lisp Hello Last night I found myself with a simple problem that in the end I couldn't solve. I'm fairly sure there is a simple solution too, i just couldn't finds it. Take note that it was late :) Imagine I... adl (7)

Exponential complexity of combinatorial algorithms 25 41 (12/4/2005 5:45:17 AM) comp.programming Here's a somewhat dumb question. Why do combinatorial algorithms have an exponential time complexity? The formula for n-combination-r (aka enn-cee-arr) is (n!) /((r!)*((n-r!))). What is the relationship betw... masood.iqbal (34)