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bug#4655: 23.1.50; buffer-swap-text oddity
From: |
Stefan Monnier |
Subject: |
bug#4655: 23.1.50; buffer-swap-text oddity |
Date: |
Wed, 07 Oct 2009 01:41:40 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux) |
> Why do you expect buffer-swap-text to switch the current buffer?
I'm not sure he expects it. And if he does, I can't tell you why, so
I'll pass.
> And, why it is doing it?
I don't think it does when not called within save-excursion.
But when called within the save-excursion, the reason is simple:
1- markers are swapped along with the buffer texts (with a some
exceptions, mostly window-markers).
2- save-excursion saves the "position and current buffer" as a marker.
Combine 1 and 2 together, and you'll see that save-excursion ends up
changing the current buffer.
Stefan