On Wed, 31 Aug 2022 16:35:27 +0000, Sri h Kolusu wrote:
> ...
>>>The DFSORT manual (and others) should not attempt to explain regular
>>>expressions. They should defer to citing a single publication with such an
>>>explanation.
>
>I completely agree, however each component within IBM is implementing a
>regular expression flavor. Different regular expression flavors are not fully
>compatible with each other. So it is difficult to have 1 central publication.
>
I'm surprised, skeptical even, that DFSORT implements regular expressions
entirely with
fresh code rather than employing available library functions such as regcomp()
with a
brief description of how arguments to regcomp() depend on options in DFSORT
commands.
An exemplar of what I consider wise design and documentation is REXX BPXWUNIX:
Parameters
cmd
The shell command that you want to run. The shell is run as /bin/sh -c
followed by
the string that you specify as the command. If a login shell is requested,
the shell
is run passing a single argument similar to the sh -Lc command.
...
It makes no attempt to describe the syntax of shell commands, which are
described
in another publication (which it fails to cite.)
>Locale is NOT supported with regular expressions and it is documented here
>
>https://www.ibm.com/docs/en/zos/2.5.0?topic=expressions-regular-application-notes
>
The following existing DFSORT functions are not compatible when used with
Regular expressions:
Locale
Ouch!
--
gil
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