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-mode1 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.
--
ejmr
南無妙法蓮華經
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.
Hello Eric
Wouldn't it be simpler to check that parent if preceded by
whitespace/brackets?
Checking if it's followed by the paamayim nekudotayim, seems also ok.
[...]
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;[...]
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?Hello Eric
Wouldn't it be simpler to check that parent if preceded by
whitespace/brackets? Checking if it's followed by the paamayim
nekudotayim, seems also ok.
Thanks for the idea. Checking for brackets would work but not
whitespace since PHP allows programmers to write code such as
echo $this-> parent; // Same as $this->parent
So perhaps checking for paamayim nekudotayim would be best.
--
ejmr
南無妙法蓮華經
Hi
Den 11/03/2013 kl. 13.55 skrev Eric James Michael Ritz lobbyjones@gmail.com:
Thanks for the idea. Checking for brackets would work but not
whitespace since PHP allows programmers to write code such asecho $this-> parent; // Same as $this->
Technically "parent" and "self" is not keywords, they are implemented as T_STRING. These are only used as keywords when the next non whitespace token is a double colon, like:
self::$property->...
So I would continue reading until the next token and decide from there if its used in a "keyword-context" or not to decide its syntax highlight color.
-K
On Mon, Mar 11, 2013 at 12:19 PM, Eric James Michael Ritz <
lobbyjones@gmail.com> wrote:
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 $this->parent;Emacs correctly highlights the first ‘parent’ as a variable name. It
also highlights ‘parent’ in the second line as a keyword, as it
should. But in the third line it treats ‘parent’ as a keyword instead
of a variable and applies the wrong syntax formatting.My idea to fix this problem is to only treat ‘parent’ as a keyword if
the scope-resolution operator immediately follows it. But before
doing that I want to know whether or not that is true. So is there
are valid situation where the keyword ‘parent’ does not have ‘::’
after it?Thank you in advanced for any advice and help.
parent and self are not keywords, they are just special class names. Apart
from that they can be freely used, e.g. you could also have a constant
called "parent".
The special meaning exists in (nearly) any classname context. parent::$foo
is just one case. It's just as special if you do new parent() or something
like that ;) So I don't think it makes sense to highlight only when
followed by ::
Nikita