[pmwiki-devel] Variable Expansion Question.

[Stirling Westrup]

Patrick R. Michaud wrote:
> On Tue, Oct 23, 2007 at 08:31:44AM -0400, Stirling Westrup wrote:
>> I'm wondering if anyone has any insight on how Pm avoids recursive loops in
>> his variable expansion routines. I ask because I need to do something similar
>> and my reading of the PmWiki code has given me no insight.
> 
> PmWiki handles this within PageTextVar() -- when performing a
> substitution for {$$foo}, it first removes any instances of
> {$$foo} from the replacement string.  This prevents any form of
> self-recursion from taking place.
> 
> PmWiki doesn't handle the case of indirect recursion of page text
> variables... but that doesn't seem to occur very often in normal
> practice.

Thanks! Now at least I won't keep looking for an existing mechanism to do what
I need...