> -----Original Message-----
> From: Nikita Popov [mailto:nikita....@gmail.com]
> Sent: 22 July 2012 16:53
> To: Jared Williams
> Cc: Nikita Popov; PHP internals
> Subject: Re: [PHP-DEV] Re: Generators in PHP
>
> On Sat, Jul 21, 2012 at 6:31 PM, Jared Williams
> <jared.willia...@ntlworld.com> wrote:
> > Can't yield a reference to an array item directly.
> >
> > Eg.
> >
> > function &map(array &$row)
> > {
> > yield $row[0];
> > }
>
> Thanks, this is fixed now.
>
> > Also seems to be a problem with iterating
> >
> > foreach(map($row) as &$value)
> >
> > cannot be done without a fatal error
> >
> > $i = map($row);
> > foreach($i as &$value)
> >
> > however works.
>
> This was an old foreach restriction that never really made
> sense and makes even less sense once generators are in. So I
> dropped it. Now everything can be iterated by-reference.
>
> > Seems relatively easy to trigger a infinite loop atm.
> >
> > Typo'd a SQL table name which caused an exception within
> PDO inside a
> > generator function, which then caused an infinite loop.
>
> I forgot to rethrow the exception in the foreach scope.
> Should be fixed now.
>
> Thanks for your feedback!
No problem.
Though here is seemingly another problem, though it could be within
spl's MultipleIterator()
function a()
{
yield 'a';
yield 'aa';
}
function b()
{
yield 'b';
yield 'bb';
}
$m = new MultipleIterator();
$m->attachIterator(a());
$m->attachIterator(b());
foreach($m as $v)
{
list($a, $b) = $v;
var_dump($a, $b);
}
causes a seg fault, whereas the vanilla array version
$m = new MultipleIterator();
$m->attachIterator(new ArrayIterator(['a', 'aa']));
$m->attachIterator(new ArrayIterator(['b', 'bb']));
foreach($m as $v)
{
list($a, $b) = $v;
var_dump($a, $b);
}
works fine.
Jared
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