[REBOL] Re: Parse and and recursion local variables?
From: lmecir:mbox:vol:cz at: 17-Mar-2007 17:54
Hi Pekr,
...
> My tags look like:
>
> <!--[section-x]-->
> subsection html code
> <!--/[section-x]-->
>
> I want to detect particular sections and invoke particular modules/code
> for them, submitting it section content. Basically it works, but I also
> wanted to try my very primitive parser to do some recursion. And it
> seems to me I tracked down, why it does not work - inside of nested
> sections, when the recursive rule is applied, I think that
> rsp-section-name is not kept local to particular recursion level? Can I
> make it local by putting e.g. parse into function body, defining a word
> (rsp-tag-nested) as a local variable? Or the issue is more complex and
> my rules simply build insufficiently?
>
I tried your code below uncommenting the marked lines and didn't reveal
what you meant by "incorrect behaviour". Can you tell me what you expected?
> ---------------------
> REBOL []
>
> template: {
> this is the beginning of html:-)
> <b><!--[mark-x]-->Hello x!<!--/[mark-x]--></b>
> <b><!--[mark-y]-->Hello y!<!--/[mark-y]--></b>
> <b><!--[mark-z]-->Hello z!<!--/[mark-z]--></b>
> <b><!--[mark-w]-->Hello w!
> another html code
> <!--[mark-u]-->
> subsection html code
> <!--/[mark-u]-->
> finishing mark-w html code
> <!--/[mark-w]--></b>
> this is the end :-)
> }
>
> out: copy ""
>
> ;--- uncommend following to get incorrect recursion behavior
> ;rsp-begin: ["<!--[" copy rsp-tag-name to "]-->" "]-->"]
> ;rsp-end: ["<!--/[" rsp-tag-name "]-->"]
>
> ;--- comment following if enabling above ones ...
> rsp-begin: ["<!--[" s: some [e: "]-->" (print copy/part s e) break | skip]]
> rsp-end: ["<!--/[" s: some [e: "]-->" (print copy/part s e) break | skip]]
>
> ;just to distinguish for eventual debugging ...
> html: [copy char skip (append out char)]
> rsp-html: [copy char skip (append out char)]
>
> rsp-section: [rsp-begin any [rsp-end break | rsp-section | rsp-html]
> ]
>
> rsp-rules: [any [rsp-section | html] end]
>
> parse/all template rsp-rules
>
> probe out
>
> halt
>
-L
