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#385 useful function not exported  ← ↑ →  #387 overloading functions in the interpreter does not work

#386 Infinite loop in LISP related to Tuple?
  
last edited 17 years ago by gdr

Edit detail for #386 Infinite loop in LISP related to Tuple? revision 2 of 3
1 2 5
Editor: gdr
Time: 2008/04/01 13:04:42 GMT-7
Note: for x in l 
added:

From gdr Tue Apr 1 13:04:42 -0700 2008
From: gdr
Date: Tue, 01 Apr 2008 13:04:42 -0700
Subject: for x in l
Message-ID: <20080401130442-0700@axiom-wiki.newsynthesis.org>

The Axiom Book (Jenks&Sutor) does not describe
this syntax valid.  All `for in' discussions are
with single variable names -- not structured or
pattern matching stuff.

So, I suspect the right answer is a diagnostic.

Submitted by : (unknown) at: 2007-11-17T22:35:54-08:00 (17 years ago)
Name :
Axiom Version :
Category : Severity : Status :
Optional subject :  
Optional comment :

The second line (which should report syntax error at worse), seems to be generating an infinite loop that exhausts memory.

axiom
g:=[(1,2),(3,4)]
LatexWiki Image(1)
Type: List Tuple PositiveInteger?
axiom
[1 for (a,b) in g]
   >> System error:
   The storage for CONS is exhausted.
Currently, 241150 pages are allocated.
Use ALLOCATE to expand the space.

On my system, the following message finally appeared: 

   >> System error:
   The storage for CONS is exhausted.
   Currently, 85895 pages are allocated.
   Use ALLOCATE to expand the space.

for x in l --gdr, Tue, 01 Apr 2008 13:04:42 -0700 reply
The Axiom Book (Jenks&Sutor) does not describe this syntax valid. All `for in' discussions are with single variable names -- not structured or pattern matching stuff.

So, I suspect the right answer is a diagnostic.