[PATCH v9 3/7] env: Allow U-Boot scripts to be placed in a .env file

[Wolfgang Denk]

Dear Tom,

In message <20211021122325.GX7964 at bill-the-cat> you wrote:
> 
> Do you have any other feedback on the entire rest of the series?

I already wrote that I support the concept, and the few nit I saw
have been fixed, I think.  Except this unneeded breaking of backward
compatibility.

> Because I'm not sure the benefit of "we can still support '+' at the end
> of a variable name, if anyone uses that" outweighs "we can more easily
> append variables in constructing our environment without relying on
> uncommon operators".

We introduce a new feature here. Defining an append operator is a
convenience thing. It could probably also solved using the
preprocessor, likely in a more ugly way.

In any case, the feature is new, and the operator is new.

For the implementation it does not matter if we define this operator
as "+=" or '=+" or "=." or something else.

the only difference is that any ioperator starting with an equal
sign is inherently backward compatible without need for arbitrary
new restrictions.

> To me "=+" as the append syntax is worse than "no
> + at the end of your variables".

In which way is it worse? For esthetic reasons?

I confirm that '+=' looks better.  But '+=" is technically broken.



Best regards,

Wolfgang Denk

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