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To: Patrick Schaaf <php@bof.de>
Cc: Daniel Lowrey <rdlowrey@php.net>, internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a113ed654a91ce405104f48d9
Subject: Re: [PHP-DEV] [RFC Discuss] Generator Delegation
From: rdlowrey@php.net (Daniel Lowrey)

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On Mon, Mar 2, 2015 at 1:34 AM, Patrick Schaaf <php@bof.de> wrote:
>
> Am 02.03.2015 00:52 schrieb "Daniel Lowrey" <rdlowrey@php.net>:
> >
> > I'd like to initiate discussion on a proposal to implement generator
> > delegation via the following new syntax inside generator functions:
> >
> >     yield * <expr>
> >
> > The Generator Delegation RFC is available here:
> >
> > https://wiki.php.net/rfc/generator-delegation
>
> I like the feature. The syntax is awful. What about "yield use (expr)"?
No new keywords, somewhat gramatical, and currently invalid syntax, as far
as I can tell.

IMO `yield use (expr)` is awful. Let's note here the unhelpful nature of
adjectives like "awful" in technical discussions.

That said, I have no special attachment to `yield *`. As noted in the RFC,
`yield *` is the syntax used in JavaScript generator delegation. I do see
value in using common idioms for existing functionality in other languages.
However, I also appreciate how the Python variation `yield from` is both
immediately readable and perhaps easier to understand. Pending any
implementation difficulties I'm indifferent between `yield from` and `yield
*`.

I think the functionality is the important thing to take away here; the
syntax can be whatever folks want it to be.

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