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To: "Nikita Popov" <nikita.ppv@gmail.com>, "Derick Rethans" <derick@php.net>
Cc: "Jared Williams" <jared.williams1@ntlworld.com>, "PHP internals"
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References: <CAF+90c_7q5MJzTMt3O6tphfps5=dtxuubWigEjg4eqGwU40sRA@mail.gmail.com> <20120829162147.QQCM24459.aamtaout04-winn.ispmail.ntl.com@p2> <CAF+90c_GbA9EoTQOf=32GmzkQQWEHRj-td7R7Y-na865dEFRUQ@mail.gmail.com> <alpine.DEB.2.02.1208292110280.25835@whisky.home.derickrethans.nl>
Date: Wed, 29 Aug 2012 22:49:57 +0200
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Subject: Re: [PHP-DEV] [VOTE] Generators
From: glopes@nebm.ist.utl.pt ("Gustavo Lopes")

On Wed, 29 Aug 2012 22:10:52 +0200, Derick Rethans <derick@php.net> wrote:

> On Wed, 29 Aug 2012, Nikita Popov wrote:
>
>> > function &bind(array $keys, array &$row)
>> > {
>> >         foreach($keys as $key)
>> >                 yield $key => $row[$key];
>> > }
>> >
>> > $row = [];
>> > $it = bind(['a', 'b'], $row);
>> >
>> > foreach($it as $key => &$ref)
>> >         echo $key;
>> > echo "\n";
>> > foreach($it as $key => &$ref)
>> >         echo $key;
>>
>> Thanks, this is now fixed. It'll throw an exception now, saying that
>> you can't traverse an already closed generator.
>
> Nothing in the core throws an exception, why would this?!
>

This is not accurate. All the iterators throw exceptions on similar  
situations. Generators are iterators, so I see no deviation from the norm  
here.

-- 
Gustavo Lopes