Taylor Campbell <xxxxxx@mumble.net> writes:

> CL conditions *are* comparable to NaN.

No, because they are passed out of band. They are not returned as
results of arithmetic operations nor accepted by arithmetic. So they
won't be printed along with other numeric results, and it makes no
sense to read them back in place of numbers.

> EOF objects are another example of condition objects (in the general
> sense, which has been erroneously referred to as 'error object')
> with no printed representation.

Because it's used to distinguish whether (read) has read something or
reached the end of file! The very purpose of the EOF object is to not
have a read syntax.

--
   __("<         Marcin Kowalczyk
   \__/       xxxxxx@knm.org.pl
    ^^     http://qrnik.knm.org.pl/~qrczak/