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Subject: bug#7718: 23.2.91; Info-isearch-search fails isearch
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From: Leo <sdl.web@HIDDEN>
Date: Thu, 23 Dec 2010 10:29:31 +0000
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Info-isearch-search returns a function that does not implement the
noerror arg(see Info-search), which means it will err even if
deliberately asked not to.

Leo

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To: Leo <sdl.web@HIDDEN>
Subject: bug#7718: Acknowledgement (23.2.91; Info-isearch-search fails
 isearch)
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Subject: bug#7718: 23.2.91; Info-isearch-search fails isearch
Resent-From: Juri Linkov <juri@HIDDEN>
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To: Leo <sdl.web@HIDDEN>
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From: Juri Linkov <juri@HIDDEN>
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Date: Thu, 23 Dec 2010 19:28:57 +0000
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> Info-isearch-search returns a function that does not implement the
> noerror arg(see Info-search), which means it will err even if
> deliberately asked not to.

Info-isearch-search does not implement the noerror arg because it just passes it
unchanged to Info-search.  Do you mean Info-search should implement noerror for
some non-interactive uses?  What it should do when noerror is non-nil?

Message sent to owner <at> debbugs.gnu.org, bug-gnu-emacs@HIDDEN:

Subject: bug#7718: 23.2.91; Info-isearch-search fails isearch
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From: Leo <sdl.web@HIDDEN>
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Date: Thu, 23 Dec 2010 22:22:12 +0000
In-Reply-To: <874oa4fgbj.fsf@HIDDEN> (Juri Linkov's message of "Thu,
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On 2010-12-23 19:28 +0000, Juri Linkov wrote:
>> Info-isearch-search returns a function that does not implement the
>> noerror arg(see Info-search), which means it will err even if
>> deliberately asked not to.
>
> Info-isearch-search does not implement the noerror arg because it just passes it
> unchanged to Info-search.  Do you mean Info-search should implement noerror for
> some non-interactive uses?  What it should do when noerror is non-nil?

That's what I meant. Info-search doesn't implement noerror. I think it
should be like the default isearch search functions:
re-/search-forward/backward: Optional argument, if t, means if fail just
return nil (no error).

Thanks.
Leo

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Subject: bug#7718: 23.2.91; Info-isearch-search fails isearch
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>> Info-isearch-search does not implement the noerror arg because it just passes it
>> unchanged to Info-search.  Do you mean Info-search should implement noerror for
>> some non-interactive uses?  What it should do when noerror is non-nil?
>
> That's what I meant. Info-search doesn't implement noerror. I think it
> should be like the default isearch search functions:
> re-/search-forward/backward: Optional argument, if t, means if fail just
> return nil (no error).

But the whole logic of Isearch using Info-search is built on the
assumption that Info-search ignores the noerror arg (that is usually t).
This allow Isearch to fail in the initial Info node
and to continue searching through other nodes without failing.

Message sent to owner <at> debbugs.gnu.org, bug-gnu-emacs@HIDDEN:

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Subject: bug#7718: 23.2.91; Info-isearch-search fails isearch
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On 2010-12-25 02:28 +0000, Juri Linkov wrote:
>>> Info-isearch-search does not implement the noerror arg because it just passes it
>>> unchanged to Info-search.  Do you mean Info-search should implement noerror for
>>> some non-interactive uses?  What it should do when noerror is non-nil?
>>
>> That's what I meant. Info-search doesn't implement noerror. I think it
>> should be like the default isearch search functions:
>> re-/search-forward/backward: Optional argument, if t, means if fail just
>> return nil (no error).
>
> But the whole logic of Isearch using Info-search is built on the
> assumption that Info-search ignores the noerror arg (that is usually t).
> This allow Isearch to fail in the initial Info node
> and to continue searching through other nodes without failing.

For users of isearch-search-string with non-nil noerror it will be a
surprise. For example, I use it before actual isearch to see if the
search is to fail (but don't err) and set things up accordingly. I found
it breaks down in info mode due to its ignoring noerror.

But it is fine if it has to remain that way. I will just wrap
isearch-search-string inside ignore-errors.

Leo

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