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Re: Guile: What's wrong with this?

From: Ludovic Courtès
Subject: Re: Guile: What's wrong with this?
Date: Wed, 04 Jan 2012 22:17:46 +0100
User-agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.90 (gnu/linux)

Hi Bruce,

Bruce Korb <address@hidden> skribis:

> On 01/03/12 15:33, Ludovic Courtès wrote:
>> Could you point me to the affected code?  What would you think of using
>> string-copy as I suggested?  The disadvantage is that you need to modify
>> your code, but hopefully that can be automated with a sed script or so;
>> the advantage is that it would work with all versions of Guile.
> The disadvantage is that I know I have "clients" that have rolled their
> own templates, presumably by copy-and-edit processes that will invariably
> include (define var "string") syntax.

If the users files are evaluated rather than compiled/loaded, this is
not a problem:

  scheme@(guile-user)> (eval (call-with-input-string "(define foo \"sdf\")" 
read) (interaction-environment))
  $9 = #<variable 32a8580 value: "sdf">
  scheme@(guile-user)> (string-set! (variable-ref $9) 1 #\x)
  scheme@(guile-user)> (variable-ref $9)
  $10 = "sxf"

Could you check whether this is the case?

In case it’s not, I have another possible solution in mind.  ;-)

> I'm sorry about being irritable.  This is the third problem with 2.x.

Yeah, I understand it can be really annoying and frustrating.  Believe
me, despite the breadth and depth of changes between 1.8 and 2.0, we did
our best to avoid such nuisances.  Hopefully we can help solve them with
you, so you can really benefit from 2.0 (it’s a significantly nicer
piece of software!)


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