Major Section: ACL2-BUILT-INS
(Char-upcase x) is equal to #\A when x is #\a, #\B
when x is #\b, ..., and #\Z when x is #\z, and is
x for any other character.
The guard for char-upcase requires its argument to be a standard
character (see standard-char-p).
Char-upcase is a Common Lisp function. See any Common Lisp
documentation for more information.
To see the ACL2 definition of this function, see pf.