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Re: dict_var_resized
From: |
John Darrington |
Subject: |
Re: dict_var_resized |
Date: |
Mon, 4 May 2009 07:09:07 +0800 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Fri, May 01, 2009 at 08:23:08PM -0700, Ben Pfaff wrote:
John Darrington <address@hidden> writes:
> dict_var_resized exists for one purpose only - it informs the GUI
> that the size of a variable has changed. That way, the var sheet
> always displays the correct information, even if a variable changes
> due to some low level operation (eg: running syntax).
Right. So if the variable doesn't belong to a dictionary, then
there's nothing to do.
> Solution 2: If that's not possible, then I think it'll be acceptable
> to simply test for d == NULL inside dict_var_resized and do
> nothing in that situation.
>
> I'd prefer solution 1 if at all possible.
I don't understand why solution 1 is preferable. Why isn't this
just a bug in dict_var_resized? I note that, for example,
dict_var_changed does test for the null-dictionary case.
Then perhaps this would be the better solution after all.
I only expressed a preference for the other solution, because Jason's
use case is the first time that internal variables other than numeric
ones have been required. Resizing "internal" variables seems to me
like a rather unusual thing to do, so getting a SIGSEGV is a good way
of alerting us that this unusual operation is taking place. However,
if there is a good argument that resizing internal string variables
should be considered a commonplace operation, then I wouldn't have any
strong objections to Solution 1.
Incidently, the code I posted in my previous email was possibly
confusing because var_create_internal is supposed to take the
casereader index as its argument, not the width of the variable as I
had implied. We'd need to create a new function in variable.c to do
what Jason wants.
J'
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- dict_var_resized, Jason Stover, 2009/05/01
- Re: dict_var_resized, John Darrington, 2009/05/01
- Re: dict_var_resized, Ben Pfaff, 2009/05/01
- Re: dict_var_resized,
John Darrington <=
- Re: dict_var_resized, Jason Stover, 2009/05/04
- Re: dict_var_resized, John Darrington, 2009/05/04
- Re: dict_var_resized, Jason Stover, 2009/05/05
- Re: dict_var_resized, John Darrington, 2009/05/05
- Re: dict_var_resized, Jason Stover, 2009/05/06
- Re: dict_var_resized, John Darrington, 2009/05/07