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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada Successor Language
Date: Mon, 4 Jun 2018 16:17:13 -0500
Organization: JSA Research & Innovation
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Xref: reader02.eternal-september.org comp.lang.ada:52932
Date: 2018-06-04T16:17:13-05:00
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>Luke A. Guest" <laguest@archeia.com> wrote in message 
>news:217213441.549636947.114978.laguest-archeia.com@nntp.aioe.org...
> Mehdi Saada <00120260a@gmail.com> wrote:
>
>>> We should adopt the common C shorthand operators, -=, +=, etc.
>> What's the problem with @ ? It's more elegant and versatile.
>>
>
> The proposal is to use +:=, -:=, etc which is ok but a little weird.

Which has been extensively discussed by the ARG but rejected. There's both 
technical issues (given the possibility of overloading, "A +:= B" cannot 
always be equivalent to "A := A + B") and the ugliness factor.

> The other proposal is to use @ as the lhs shorthand.

This is in Ada 2020. I believe GNAT already supports it (in extensions 
mode). It's a lot more flexible since it can be used in any function or 
attribute -- no restriction to operators.

                                       Randy.