Ecaml_value.ValueSource(Info-goto-node "(elisp)Type Predicates")(describe-function 'consp)
If supplied, ?car and ?cdr are additionally required to return true for the car and cdr, respectively.
(describe-variable 'most-negative-fixnum)
(describe-variable 'most-positive-fixnum)
of_int_exn n raises if n is not in the range emacs_min_int, emacs_max_int
of_utf8_bytes_cached is like of_utf8_bytes, except it keeps a hash table mapping each OCaml string to the corresponding Elisp string. This can be used to optimize the conversion of OCaml values to Elisp values.