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Fix (length NON-SEQUENCE) documentation

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Suggested by Eli Zaretskii <eliz@gnu.org> in the following threads:
https://lists.gnu.org/archive/html/emacs-devel/2018-07/msg00171.html
https://lists.gnu.org/archive/html/emacs-devel/2018-07/msg00206.html

* doc/lispref/sequences.texi (Sequence Functions): Mention that
'length' signals a 'wrong-type-argument' also when given a
non-sequencep argument.
This commit is contained in:
Basil L. Contovounesios 2018-07-07 19:33:08 +03:00 • committed by Eli Zaretskii
parent a427de9c86
commit da5d6dbe39
1 changed files with 7 additions and 5 deletions
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12
doc/lispref/sequences.texi
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@ -71,13 +71,15 @@ string, bool-vector, or char-table, @code{nil} otherwise.
@cindex list length
@cindex vector length
@cindex sequence length
@cindex bool-vector length
@cindex char-table length
@anchor{Definition of length}
This function returns the number of elements in @var{sequence}. If
@var{sequence} is a dotted list, a @code{wrong-type-argument} error is
signaled; if it is a circular list, a @code{circular-list} error is
signaled. For a char-table, the value returned is always one more
than the maximum Emacs character code.
This function returns the number of elements in @var{sequence}. The
function signals the @code{wrong-type-argument} error if the argument
is not a sequence or is a dotted list; it signals the
@code{circular-list} error if the argument is a circular list. For a
char-table, the value returned is always one more than the maximum
Emacs character code.
@xref{Definition of safe-length}, for the related function @code{safe-length}.