Document that variable binding order is unspecified

* doc/lispref/variables.texi (Local Variables):
* cl.texi (Modify Macros): Document that binding order in 'let' and
'cl-letf' is unspecified.

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/misc/cl.texi b/doc/misc/cl.texi
index c62fa727c10..75a83602fa3 100644
--- a/doc/misc/cl.texi
+++ b/doc/misc/cl.texi
@@ -1179,6 +1179,11 @@ behavior.  (@code{point} and @code{point-marker} are equivalent
 as @code{setf} places; each will accept either an integer or a
 marker as the stored value.)
 
+Like in the case of @code{let}, the @var{value} forms are evaluated in
+the order they appear, but the order of bindings is unspecified.
+Therefore, avoid binding the same @var{place} more than once in a
+single @code{cl-letf} form.
+
 Since generalized variables look like lists, @code{let}'s shorthand
 of using @samp{foo} for @samp{(foo nil)} as a @var{binding} would
 be ambiguous in @code{cl-letf} and is not allowed.