Accessing page number in markup for custom title

[Rob Vlasaty]

I’m trying to make a different title for each song in a book depending on 
the page (song number to the left then title for even pages, title then song 
number to the right for odd pages).  I’ve managed to write a little bit 
of scheme code, but I’m stuck on how to access the value of the page 
number.  Here’s what I've come up with so far:

        #(define MyTitle 
                (if (odd? 3) "odd title" "even title" )  )

        scoreTitleMarkup = \markup {    
                \MyTitle
        }  


This works when I put in an even or odd number in place of the “3”. 
 From looking at the file titling.scm, I would think I could just replace the 
“3” with “page-number”, but that doesn’t work.  
I’ve tried every variation I could think of with no luck, and can't find 
anything in the documents.  What expression would I put to access the page 
number at this point?

Rob


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