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bug#11934: 24.1; provide variable for pp.el to control max display width


From: Michael Heerdegen
Subject: bug#11934: 24.1; provide variable for pp.el to control max display width
Date: Fri, 29 Apr 2016 16:14:56 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.93 (gnu/linux)

Lars Ingebrigtsen <address@hidden> writes:

> I agree.  What pp does now with simple lists isn't optimal.

AFAICT pp.el could be extended easily for handling this problem.

pp is currently very simple - see `pp-to-string'.  It does just `prin1'
(which does most of the work already) the object into a temp buffer.
Then it does some simple cleanups: `pp-buffer'.  That would be the
function to extend (Drew, wanne give it a try?).

But of course handling this problem is not trivial: we can't distinguish
"simple lists" from code, and what might look good for the first might
look weird for a macro call with a special lisp-indent-function value
(e.g. imagine a `defun' call with a line break inserted just after
"defun").

Another challenge is what to do if we have already nearly exhausted the
width limit.


Michael.






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