On Tue, 15 Feb 2005 18:39:44 -0500, Alan Grover <address@hidden> wrote:
Guile 1.6.4
Linux xxxx 2.6.5-7.145-default #1 Thu Jan 27 09:19:29 UTC 2005 i686 i686
i386 GNU/Linux
SuSe 9.1
Some instance and class introspection procedures give anomalous results.
Specifically, they seem to give false when they shouldn't.
My results (from code below, just for current-input-port). Note the #f's":
; from interactive guile
(class #<<class> <soft-input-port> 8087280>
instance? #f
(is-a? <soft-input-port>) #f
class-direct-supers (#<<class> <soft-port> 80872b0> #<<class>
<input-port> 8084110>)
(is-a? <input-port>) #t
Results are repeatable if tried in the same interactive interpreter, or
run from a script. However, I get the following variations:
* Run from a script: (is-a? <soft-input-port>) #t
* Use my .guile: (is-a? <soft-input-port>) #t
* instance? should give #f since the port is not a normal GOOPS
instance but rather a built-in datatype.
* the class-direct-supers list looks OK
* (is-a? <input-port>) gives the correct value #t
The only thing anomalous above is that (is-a? x <soft-input-port>)
gives #f in the interpreter.
I can't repeat that in the development version, so it seems specific
to Guile-1.6.4. Can someone else look into that?
Thanks,
M