Mercurial > hg > xemacs-beta
diff man/lispref/variables.texi @ 1024:ccaf90c5a53a
[xemacs-hg @ 2002-10-02 09:29:37 by stephent]
21.4 -> R21.5 stuff
manual improvements <87k7l1p6su.fsf@tleepslib.sk.tsukuba.ac.jp>
regexp tests <87fzvpp6mf.fsf@tleepslib.sk.tsukuba.ac.jp>
add-to-list doc Ville Skyttä <87bs6dp6io.fsf@tleepslib.sk.tsukuba.ac.jp>
Move filename associations Ville Skyttä <877kh1p6ee.fsf@tleepslib.sk.tsukuba.ac.jp>
lookup-syntax-properties <87admil2e0.fsf_-_@tleepslib.sk.tsukuba.ac.jp>
fix stale submatches <873crpp50v.fsf_-_@tleepslib.sk.tsukuba.ac.jp>
info for developers <87y99hnqc4.fsf@tleepslib.sk.tsukuba.ac.jp>
| author | stephent |
|---|---|
| date | Wed, 02 Oct 2002 09:31:40 +0000 |
| parents | c33ae14dd6d0 |
| children | 6780963faf78 |
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--- a/man/lispref/variables.texi Tue Oct 01 21:55:21 2002 +0000 +++ b/man/lispref/variables.texi Wed Oct 02 09:31:40 2002 +0000 @@ -725,12 +725,15 @@ One other function for setting a variable is designed to add an element to a list if it is not already present in the list. -@defun add-to-list symbol element +@defun add-to-list symbol element &optional append This function sets the variable @var{symbol} by consing @var{element} onto the old value, if @var{element} is not already a member of that value. It returns the resulting list, whether updated or not. The value of @var{symbol} had better be a list already before the call. +If the optional argument @var{append} is non-@code{nil}, @var{element} +is added at the end of the list. + The argument @var{symbol} is not implicitly quoted; @code{add-to-list} is an ordinary function, like @code{set} and unlike @code{setq}. Quote the argument yourself if that is what you want.