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Date: Wed, 11 May 2016 12:40:10 +0200
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To: Lester Caine <lester@lsces.co.uk>
Cc: internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Re: [RFC][VOTE] Nullable Types
From: quim@kalpe.com (Quim Calpe)

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On Wed, May 11, 2016 at 12:26 PM, Lester Caine <lester@lsces.co.uk> wrote:

> On 10/05/16 21:26, Levi Morrison wrote:
> > It can affect the results.
> >
> >     function foo(?Foo $param) {}
> >
> > If any code out there is calling foo with null then that code will now
> > break if you remove the question mark.
>
> Cart before Horse comes to mind ...
>
> If the function is going to fail if you pass in a null ... you check for
> the null before calling it. OK the '?' is a flag that you need to do
> that, but you really need proper documentation as to just what Foo
> expects. If I've handled the null case situation, the ? is redundant?
>

function foo(?Foo $param) Is not going to fail if you pass a null,
precisely "?" allow you to pass a null


I'm still failing to see an overall picture of what people are trying to
> achieve. Adding errors means that those errors need to be handled. If
> the function gets a 'null' then there is a reason, and either the
> function should not have been called ... workflow failed ... or the
> function should simply handle the 'null' case. If the '?' throws an
> error the workflow is broken after the event where a user code warning
> would be more helpful.
>
> --
> Lester Caine - G8HFL
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