On Aug 21, 2015 5:59 PM, "Nick Coghlan" <ncoghlan@gmail.com> wrote:
>
> On 22 August 2015 at 05:52, Mike Miller <python-ideas@mgmiller.net> wrote:
> > Yes, we were discussing these custom prefixes in Yuri's thread yesterday,
> > but Guido dropped a big -1 there. However, you Eric and Nick make some
> > compelling arguments in favor of them; they do solve several of our
> > outstanding issues.
> >
> > Would he be able to be persuaded to change his mind?
>
> It's also worth reiterating my concept of using "!" to introducing the
> arbitrary "magic happens here" prefixes. That is, you'd write them
> like this:
>
> myquery = !sql"SELECT $column FROM $table;"
> mycommand = !sh"cat $filename"
> mypage = !html"<html><body>$content</body></html>"
>
> I'd previously suggested a syntax along those lines for full compile
> time AST manipulation where the compiler also had to be made aware of
> the prefix names somehow, but I think the proposals that have evolved
> around f-strings make it possible to instead resolve the named
> reference at runtime, while still having the compiler handle the
> subexpression extraction and evaluation.
So, str subclasses with _repr_sql_ functions that sometimes serialize and translate differently based on ~threadlocals for SQL variant, lang, charset
; and a new syntax for str.format(**globals()+locals())?
>
> Regards,
> Nick.
>
> --
> Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia
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