Case sensitive reading.

["Scott E. Fahlman" <Fahlman@C.CS.CMU.EDU>]

The Lisp reader was designed primarily for reading Lisp code.  There are
all sorts of things in other computer languages that would tend to choke
it.  Case sensitivity is one of them.  It is unreasonable to expect that
there would be a few built-in switches you could throw to turn the Lisp
reader into a C parser or even a C tokenizer.  On the other hand, there
are lots of built-in facilities that would make it a relatively
strightforward matter to write such a thing from scratch.

-- Scott