Double-Colon Always Follows the 'parent' Keyword?

From: Date: Mon, 11 Mar 2013 11:19:48 +0000
Subject: Double-Colon Always Follows the 'parent' Keyword?
Groups: php.internals 
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Hello everyone,

I have a question about the internals of PHP, but this is not about
advancing the development of the language, so I apologize if this is
on the wrong list.  I am choosing to post to this list because I
believe the people here are most qualified to answer my question.

This is what I want to know: Is there any valid situation in PHP where
the ‘parent’ keyword is not followed by the scope-resolution operator?
I am asking to help me decide on the best way to fix a bug for
php-mode[1] for GNU Emacs.  Consider these three lines:


    echo $parent;
    echo parent::$foo;
    echo $this->parent;


Emacs correctly highlights the first ‘parent’ as a variable name.  It
also highlights ‘parent’ in the second line as a keyword, as it
should.  But in the third line it treats ‘parent’ as a keyword instead
of a variable and applies the wrong syntax formatting.

My idea to fix this problem is to only treat ‘parent’ as a keyword if
the scope-resolution operator immediately follows it.  But before
doing that I want to know whether or not that is true.  So is there
are valid situation where the keyword ‘parent’ does not have ‘::’
after it?

Thank you in advanced for any advice and help.



[1]: https://github.com/ejmr/php-mode

--
ejmr
南無妙法蓮華經

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