[J3] Why is += missing?

[Vipul Parekh]

On Wed, Sep 1, 2021 at 7:48 PM Van Snyder via J3 <j3 at mailman.j3-fortran.org>
wrote:

> .. If ASSOCIATE is too onerous, a statement-scope association, as I
> proposed in Section 2.15 of 03-258r1, can ameliorate that. Both the
> ASSOCIATE construct, and the statement-scope association I proposed, are
> more general than +=. ..
>

The suggestion in section 2.15 of 03-258r1 with *a special character* to
designate a pronoun fails to come across as Fortran-like.  One example
given in section 2.15 of 03-258r1 is as follows:

    a(s @ (3*i+1)) = b(s)  ! instead of a(3*i+1) = b(3*i+1)

In my personal experience in industry, the languages that use special
characters liberally present a lot of issues to many engineers and
scientists with readability and ease-of-use, especially if the idiom(s)
with such characters are not well-established; I believe the use of '@'
above will fall into such a category.

Many aspects of modern Fortran (and by this I mean revisions starting with
Fortran 90) with block constructs have the look and feel of technical
"grammar" and as such, it is welcome to my peers and colleagues.  From what
I have seen and learnt, I believe something like a 'WITH` *statement *clause
will go better with modern Fortran when it comes to statement-scope
association:

   with (s => 3*i+1) a(s) = b(s)

Vipul Parekh
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