arnold@gatech.UUCP (01/23/84)
I quote from K&R, page 180, Reference Manual section 2.3, KEYWORDS
(*'s indicate boldface):
The following identifers are reserved for use as keywords, and may
not be used otherwise:
(... C reserved words, including the identifier "entry")
The *entry* keyword is not currently implemented by any compiler but
is reserved for future use. Some implementations also reserve the words
*fortran* and *asm*.
end quote.
My question is this: Is "entry" still reserved? According to the
System V documentation, it is. BUT, the source for the System V routine
hsearch(3) uses "entry" as a structure tag (i.e. a normal identifier), and
neither that compiler nor the 4.1BSD compiler complains in the least
(neither did the System IV compiler, which is where hsearch came from
originally. [Yes I have actually worked on a system running Unix 4.0]).
So, howcum? If "entry" is no longer reserved, the documentation
should say so. If it still is, the compiler(s) should complain. I find it
hard to believe that this has gone totally unnoticed by anybody!
I found this when trying to port hsearch to a locally written compiler
for Pr1me computers. That compiler follows K&R, and naturally died miserably
when it hit the "entry" used as an identifier. (It's recursive-descent to
boot, which makes life even more fun [sigh].)
Thanks in advance,
Arnold Robbins
--
Arnold Robbins
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