I know I'm strongly -1 on allowing much more than currently exists for
f-strings. For basically the same reason Stephen explains.
Newlines inside braces, for example, go way too far away from readability.
Nested expressions also feel like an attractive nuisance. I use f-strings
all the time, but in much the same way a thousand character regular
expression is an abuse (even if perfectly well defined grammatically),
really complex f-strings worries look and feel much the same.
On Mon, Sep 20, 2021, 9:39 PM Stephen J. Turnbull <
stephenjturnb...@gmail.com> wrote:
> Eric V. Smith writes:
>
> > >> But this does not:
> > >>
> > >> f'{1 +
> > >> 2}'
> > >
> > > The later is an error with or without the 'f' prefix and I think that
> > > this should continue to be the case.
> > >
> > The thought is that anything that's within braces {} and is a valid
> > expression should be allowed.
>
> -0 FWIW, some thoughts specific to me, I don't know how
> representative they might be of others.
>
> I guess you could argue that the braces are a kind of expression-level
> parenthesis, but I don't "see" them that way. I see *one* string with
> eval'able format expressions embedded in it, so that single-quoted
> strings can't have embedded newlines. I also don't see the braces as
> expression-level syntax (after all, they already have two different
> meanings at expression level), I see them as part of f-string syntax.
> So even with triple-quoted strings, my eyes "want" to see parentheses
> or line continuation (which already work).
>
> I'm sure I could get used to the syntax. But ...
>
> Is this syntax useful? Or is it just a variant of purity trying to
> escape Pandora's virtualbox? I mean, am I going to see it often
> enough to get used to it? Or am I going to WTF at it for the rest of
> my life?
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