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Re: bug#8219: Effect of deletions on indirect buffers (Bug#8219)
From: |
Chong Yidong |
Subject: |
Re: bug#8219: Effect of deletions on indirect buffers (Bug#8219) |
Date: |
Fri, 11 Mar 2011 15:58:57 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
Eli Zaretskii <address@hidden> writes:
>> Hence, in the aftermath of a deletion, buffer B's values of PT (and
>> BUF_BEGV and BUF_ZV) can be larger than BUF_ZV.
>
> Isn't that a bug, right there? Why doesn't del_range_2 update the
> indirect buffer (B) as well, when deletion removes text so that its PT
> becomes invalid?
This is not currently easy. We don't keep track of indirect buffers
(looping over the buffer list each time we do a deletion would be rather
inefficient), so this would need some new members of the buffer struct.