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Date: Thu, 11 Mar 2021 08:45:04 +0000
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To: internals@lists.php.net
Message-ID: <0DC08797-11DD-4D45-8C43-5678822DA259@gmail.com>
Subject: Re: [PHP-DEV] Honour the Default Value of 'return' Statement According to the Function Signature
From: rowan.collins@gmail.com (Rowan Tommins)

On 11 March 2021 03:37:52 GMT, office=2Ehamzaahmad@gmail=2Ecom wrote:
><?php
>function get_nationality_string(int $country_code) : string | "unknown"
>{
>	return;
>};

If I understand you correctly, your idea is that the "return;" here would =
be treated automatically as "return 'unknown';" I think that's an interesti=
ng idea, although I can't immediately think of a situation where I'd use it=
=2E

My main concerns are with the syntax:

- Firstly, specific literals aren't currently allowed in return types, and=
 allowing them would have other implications=2E Three exception is "false",=
 which is allowed because of its common use as an error code, including in =
many internal functions=2E
- Secondly, it could be ambiguous which is intended to be the default valu=
e, if the return type was something like int|"yes"|"no"

Perhaps the default return value would need to be specified separately fro=
m the return type somehow?

Regards,
Hi Hamza,

Welcome to the list, and thanks for sharing this idea=2E

--=20
Rowan Tommins
[IMSoP]