lexbind: how to replace lexical-let approach to hide secrets (was: lexbind ready for merge)

[Ted Zlatanov]

On Wed, 30 Mar 2011 13:35:56 +0200 Juanma Barranquero <address@hidden> wrote: 

JB> On Wed, Mar 30, 2011 at 06:10, Daniel Colascione
JB> <address@hidden> wrote:

>> Even if it's not particularly common, being consistent with Common Lisp and
>> having fewer special cases are good things.  Some people use constructs like
>> this to create module-private variables (which is a bad idea, but that
>> doesn't stop people doing it.)

JB> Why a bad idea? It's a common idiom for private, persistent variables.

Slightly related: auth-source.el uses `lexical-let' to define lambda
accessors for secrets (so printing them, for instance, won't show a
password).  Will the secrets still be hidden in the lexbind branch?  And
is there a smarter way to do it?

Sample code:

(let ((data "my secret"))
  (lexical-let ((data data)) (lambda () data)))

Thanks
Ted