On 2013-11-06, at 11:06, Bob Shannon wrote:

>> The "//" hack has long been deprecated by POSIX.  IBM should have heeded 
>> that caution and avoided it.
> 
> Since IBM's use of  "//" predated POSIX by twenty years, perhaps POSIX should 
> have avoided using it.
>   
I think that by deprecating it, POSIX counseled avoiding its use.

Are you thinking of "//" to differentiate legacy data sets from
UNIX files in the fopen() function, or of "//" as a prefix to
JCL statements?  I (and POSIX) meant the former.

-- gil

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