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bug#35254: 27.0.50; cc-mode/electric-pair-mode/electric-layout-mode: bad


From: João Távora
Subject: bug#35254: 27.0.50; cc-mode/electric-pair-mode/electric-layout-mode: bad trailing whitespace behavior in cc-mode
Date: Tue, 14 May 2019 11:34:24 +0100

On Tue, May 14, 2019 at 10:27 AM Alan Mackenzie <address@hidden> wrote:
The bug is, type lots of <CR>s in a row; the indentation WS isn't
getting removed from the blank lines.  Currently electric-indent-inhibit
is inhibiting this removal.

Do you mean the "removal of the WS in the lines preceding the current".
In other words, do you mean "removal of the trailing WS that was once
proper indentation"? 

Or do you think that the current line, the one where point stands, should
not be indented at all in certain electric-* variable combinations and or
c-electric-* variable?  Which of those combinations?
 
Probably.  Maybe João should check this, once he's fully back with us.

I'm afraid I can't put a date on that. There's a bun in the oven...

An important development towards figuring out this issue is that a
significant fraction of us agrees on what the behavior should be
in what cases.  Then we should code tests that assert that behavior
possibly reusing the fixtures in electric-tests.el.

> The same bug occurs in Python Mode.
> Succinctly, the bug is that on pressing <CR> lots of times in a row, the
> indentation WS is being left on the blank lines rather than being
> removed.

I see.  That does make sense. But, to be sure, we _dont_ what to
remove the indentation WS on the "current" line, right?

João


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