Is there an idiomatic/commonly used/established convention to convert non-
nil values to
t that other Elisp programmers are likely to recognize?
Sometimes I have a non-
nil value, say from calling
member, that I want to return as either
nil (so that I don't leak implementation details (Cf. Hyrum's Law)).
The Emacs Lisp Coding Conventions, for example, say nothing about this that I can see. The closest I've found is the Elisp manual's section on
t, which says "When you need to choose a value that represents true, and there is no other basis for choosing, use
Ways I've come up with:
(and val t)
(if val t nil)
(not (not val))
Does one of these have a benefit over the other? Is one "more idiomatic"?