* Why does save-match-data do what it does?
@ 2018-03-07 5:03 Marcin Borkowski
2018-03-07 9:55 ` Robert Pluim
0 siblings, 1 reply; 3+ messages in thread
From: Marcin Borkowski @ 2018-03-07 5:03 UTC (permalink / raw)
To: Help Gnu Emacs mailing list
Hi all,
save-match-data works by assigning the current match data to a temporary
variable, doing its stuff and restoring it again. Why not this?
--8<---------------cut here---------------start------------->8---
(defmacro save-match-data-icmd (&rest body)
"An alternative definition of `save-match-data'."
(declare (indent 0) (debug t))
`(let ((inhibit-changing-match-data t))
,@body))
--8<---------------cut here---------------end--------------->8---
(Of course, without the quoting, for the reason mentioned in subr.el.)
TIA,
--
Marcin Borkowski
http://mbork.pl
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: Why does save-match-data do what it does?
2018-03-07 5:03 Why does save-match-data do what it does? Marcin Borkowski
@ 2018-03-07 9:55 ` Robert Pluim
2018-03-07 10:40 ` Marcin Borkowski
0 siblings, 1 reply; 3+ messages in thread
From: Robert Pluim @ 2018-03-07 9:55 UTC (permalink / raw)
To: Marcin Borkowski; +Cc: Help Gnu Emacs mailing list
Marcin Borkowski <mbork@mbork.pl> writes:
> Hi all,
>
> save-match-data works by assigning the current match data to a temporary
> variable, doing its stuff and restoring it again. Why not this?
>
> (defmacro save-match-data-icmd (&rest body)
> "An alternative definition of `save-match-data'."
> (declare (indent 0) (debug t))
> `(let ((inhibit-changing-match-data t))
> ,@body))
What if body want to use match data?
Robert
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Why does save-match-data do what it does?
2018-03-07 9:55 ` Robert Pluim
@ 2018-03-07 10:40 ` Marcin Borkowski
0 siblings, 0 replies; 3+ messages in thread
From: Marcin Borkowski @ 2018-03-07 10:40 UTC (permalink / raw)
To: Robert Pluim; +Cc: Help Gnu Emacs mailing list
On 2018-03-07, at 10:55, Robert Pluim <rpluim@gmail.com> wrote:
> Marcin Borkowski <mbork@mbork.pl> writes:
>
>> Hi all,
>>
>> save-match-data works by assigning the current match data to a temporary
>> variable, doing its stuff and restoring it again. Why not this?
>>
>> (defmacro save-match-data-icmd (&rest body)
>> "An alternative definition of `save-match-data'."
>> (declare (indent 0) (debug t))
>> `(let ((inhibit-changing-match-data t))
>> ,@body))
>
> What if body want to use match data?
What is the offical ascii art for a person clapping their forehead with
their palm?
Thanks!
--
Marcin Borkowski
http://mbork.pl
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-03-07 5:03 Why does save-match-data do what it does? Marcin Borkowski
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