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Bug #77966 Cannot alias a method named "namespace"
Submitted: 2019-05-04 01:42 UTC Modified: 2019-05-07 15:23 UTC
From: mattacosta at gmail dot com Assigned:
Status: Verified Package: Scripting Engine problem
PHP Version: 7.3.5 OS:
Private report: No CVE-ID: None
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 [2019-05-04 01:42 UTC] mattacosta at gmail dot com
Description:
------------
Methods may use semi-reserved keywords, however it is not possible to alias a method named "namespace". According to the error, the alias statement somehow becomes equivalent to 'as as bar'.

Test script:
---------------
<?php

trait A {
    function namespace() {}
}

class C {
    use A {
        namespace as bar;
    }
}

Expected result:
----------------
No error. This should be no different than if the method were named 'foo' and then using 'foo as bar'.

Actual result:
--------------
Fatal error: An alias (bar) was defined for method as(), but this method does not exist in /in/DmNne on line 7

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 [2019-05-07 15:23 UTC] nikic@php.net
-Status: Open +Status: Verified
 [2019-05-07 15:23 UTC] nikic@php.net
I think the problem here is that we'll only reduce T_NAMESPACE as a semi-reserved identifier after already fetching T_AS as the next lookahead token, at which point zend_lex_tstring() will use the contents of "as" rather than "namespace".
 
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Last updated: Wed May 22 08:01:26 2019 UTC