Which code looks cleaner?
foo = bar' 'baz,
foo = bar baz
When you're building command strings that include spaces, it's more readable if
those spaces appear in the source in a manner similar to the generated command.
I agree, though, that in things like BNF it's desirable to make spacces an
explicit part of the syntax, often in the form of generic white speses, E.g.,
WS, FWS, CFWS.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Charles Mills [charl...@mcn.org]
Sent: Sunday, June 27, 2021 2:01 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Coding for the future
I tend to think of the insertion of blanks to be unfortunate.
It is great if you are wanting to demonstrate the incredible simplicity of
Rexx:
Say Hello World
But I think if you want a blank between the two halves of the "continued"
(in quotations) literal then just code it.
Foo = "blah blah_" || ,
"blah blah"
But different strokes for different concatenations. De gustibus ...
If you want the code to run on different platforms you might just have to
code for that. Would not be the first time for either of us. For most of us.
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
Behalf Of Seymour J Metz
Sent: Sunday, June 27, 2021 10:55 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Coding for the future
Yes, but the original code inserted a blank between the two strings; It's
the difference between continuing "'foo bar'" and continuing "'foo bar '".
Linux on z and z/OS Unix System Services both run on an IBM mainframe but
they don't use the same line end convention.
What if I want the code to run on multiple platforms? That's an example of
why magic numbers are bad.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Charles Mills [charl...@mcn.org]
Sent: Sunday, June 27, 2021 1:45 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Coding for the future
Right, it makes it into (effectively) on long "continued" (if you will)
literal. Effectively, not literally.
I was assuming the IBM mainframe as this is the IBMMAIN mailing list. And my
point is not the value x'0a' but rather the technique. Substitute whatever
magic number is a linefeed on your platform.
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