Re: Match <div and </div>

[Benno Schulenberg]

Op 24-01-2023 om 06:52 schreef Seb:
> One detail for other readers of the list: I didn't see any "tortoise bracket" in 
> your email. But there were question marks.

Then your mailer seems not to support UTF-8.  Apparently you are one of
the few people that still stick to ISO-8859-*.  The tortoise brackets
appear fine for me in the archive:

  https://lists.gnu.org/archive/html/help-nano/2023-01/msg00013.html

> The way you solved the problem indicates that the same technique would work for 
> other pairs, such as <form or <p. But I don't want to assign a keystroke to each. 
> I tried to modify the line by replacing the first "div" with "(\w+)" and the 
> following ones with "\1", as I would in a Perl regexp. It's not working.

The correspondence between "(...)" in a search string and "\x" in the
replacement string is valid only within a single replace command: a \x
does not carry over into subsequent replace commands.  In other words:
each replace command stands on its own.

(Also: even if the \x would have carried over, the keystroke would have
failed to work wherever a HTML document contains an non-paired tag, like
<br>.)

If you want to be able to jump not just between <div> and </div> but
also between other pairs of tags, then you have to add the relevant
replace commands for each tag to the key binding, and use a different
replacement for each tag.  For example:

  bind M-B "{replace}<div{enter}^Q{enter}A
            {replace}</div{enter}^R{enter}A
            {replace}<form{enter}^S{enter}A
            {replace}</form{enter}^T{enter}A
            {findbracket}
            {replace}^T{enter}</form{enter}A
            {replace}^S{enter}<form{enter}A
            {replace}^R{enter}</div{enter}A
            {replace}^Q{enter}<div{enter}A
            {left}{right}" main

In this case, instead of rare code points, I have used control codes
that are very unlikely to occur in any document.  Enter each one by
preceding the keystroke with M-V.

Benno

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