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Date: Tue, 13 Aug 2019 12:01:53 +0100
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Subject: Re: [PHP-DEV] [RFC] Namespace-scoped declares, again
From: markyr@gmail.com (Mark Randall)
Message-ID: <php.internals-106566@news.php.net>

On 13/08/2019 10:02, Rowan Collins wrote:
> I really like this approach. It allows a package definition file to 
> exist, without either the language or the header of each file having to 
> define its location.

#
# File: /lib/company/project1/a/b/MyClass.php
#

<?php

   declare_import(company[:label]);

   namespace company/project1/a/b;

   ...


#
# File: /lib/company/__nsmeta.php
#

<?php

   namespace company;

   namespace_declare [:label] {
     strict_types=1;
     strict_operators=1;
     upgrade_errors_to_exceptions=E_ALL;
   }

   final class __nsmeta {
     /* does nothing except be findable by the autoloader */
     /* and defaults to private constructor so it can't be used */
   }

   ...


Caveat would be for situations that do not use an autoloader, the 
__nsmeta.php would need to be loaded first, this is something that 
PHP7.4 autoloaders would need to take into consideration.

Mark Randall