Questions tagged [chez-scheme]
Use this tag for questions about the Chez-Scheme dialect of the Scheme programming language.
chez-scheme
92
questions
0
votes
2
answers
56
views
Why is (atom? (car '('bacon 'and 'eggs))) different from (atom? 'bacon) in ChezScheme?
I'm going through The Little Schemer in ChezScheme and in chapter 2 I run through the following problem. I write the definition of lat? according to the book.
(define lat?
(lambda (l)
(...
2
votes
1
answer
126
views
Encode "ä", "ö", "ü" and "ß" in scheme (get german text from file)
I'm new to scheme and try to build a simple application in scheme. I want to use simple text files as a database, so the program basically load text from a file, do something with it and save the ...
- 21
1
vote
1
answer
123
views
Chez Scheme FFI Procedure Doesn't Work After Change to Apple Silicon
I have been using a simple piece of FFI code in Chez Scheme
to obtain the number of rows and columns of the terminal emulator where a program is running. The procedure used to work when running with ...
- 5,362
1
vote
0
answers
85
views
In Scheme, is there a built-in function called "ref"?
In Scheme, is there a built-in function called "ref"? I am reading "The Little Learner" and came across the following code:
(define line
(lambda (x)
(lambda (θ)
(+ (* (...
- 11
0
votes
0
answers
32
views
Chezscheme says "Exception: attempt to apply non-procedure #<void>" when I tried to print a pascal triangle [duplicate]
I'm new to scheme and I'm learning sicp.
I'm working on exercise 1.12 and tried to print a pascal triangle with the code below.
Cause I don't know much about scheme IO, I only used display procedure.
(...
1
vote
1
answer
144
views
Why is my (chez) scheme symbol not visible when running with --program, but is with --script?
I'm trying to get my head around using Chez Scheme and running programs with it, and I encountered a thing I can't quite make sense of. Lets say I wanted to have a scheme program that did some stuff, ...
- 899
1
vote
0
answers
341
views
Compatibility with both Chez and Chicken Scheme
I'm trying to write a program compatible with both Chez and Chicken Scheme. Starting with something maximally simple:
(c1) R:\>type hello.ss
(display "hello, world\n")
(c1) R:\>csc ...
- 32.7k
2
votes
1
answer
204
views
How to find line causing exception in Chez Scheme
I have a couple of files written in Chez Scheme, each about a thousand lines. When I try to load a file into the REPL:
> (load "filexxx.scm")
...
Exception: variable A is not bound
Type (...
- 373
0
votes
1
answer
114
views
How and when to use ChezScheme's timer interrupt?
The document of Chez mentioned set-timer and timer-interrupt-handler, but how to "kick off" or combine them? Is it used to implement things like periodic events or just some delayed ...
0
votes
2
answers
144
views
How can I run scheme?
1( import ( chezscheme ) )
2
3
4 ( define ( bigger a b )
5 ( if ( > a b )
6 a
7 b
8 )
9 )
10
11 ( define ( smaller a b )
12 ( if ( < a b )
...
- 111
1
vote
2
answers
113
views
Literals in syntax-rules don't work in libraries in Scheme
I want to define new syntax. If I define it without a library, just
(define-syntax sample1
(syntax-rules (:times)
[(_ n :times body ...)
(list n (sample1 body ...))]
[(c body ...)
'...
- 35
0
votes
2
answers
281
views
Capturing the output of an external call as a string (in Chez Scheme)
Using Chez Scheme, I tried to capture the output of an external command into a string port (see https://www.scheme.com/csug8/io.html):
(define output
(with-output-to-string (lambda () (system "...
- 1,206
1
vote
2
answers
590
views
A question about cond expressions in Scheme
With Chez Scheme version 9.5.5, consider the two examples of cond:
(cond #t (else 2))
(cond (> 2 1) (else 2))
The first expression evaluates to #t, while the second expression evaluates to 1.
It ...
- 1,955
0
votes
0
answers
141
views
Mixed programming between scheme and C
I'm reading the CSUG to learn the FFI of chez-scheme. So I may have some beginner's error.
I just want to know is there some question of FFI.
C have some type of data, just like char, float, double, ...
- 1
0
votes
1
answer
101
views
Is it possible to get the current raise continuation in debug mode in Chez-Scheme?
I have the following program:
debugging.scm
(define (fn1 x)
(printf "fn1/ x=~a\n" x)
(fn2 x)
(printf "fn1/ end\n"))
(define (fn2 x)
(printf "fn2/ x=~a\n" ...
- 1,399