Re: [SimpleParse] Look ahead in the tree

[Mike C. F. <mcf...@ro...>]

Martin d'Anjou wrote:

>Hi,
>
>It appears I've defined a syntax where some amount of looking ahead in the 
>tree is required. What support is there when I parse the tree with a 
>DispatchProcessor extension?
>
Not anything specific. Keep in mind, however, that dispatch processor is
just a simple method-dispatching mechanism.  You can readily tell your
higher-level dispatch method to pass multiple values to a method for
dealing with the complex data-set and then have that method use the
dispatching mechanism when it wants to recurse:

class X( DispatchProcessor ):
    def parent( self, ... ):
       result = []
       for childIndex in range(len(children)):
          result.append( self.subElements( children[childIndex:] ))
    def subElements( self, elements ):
       current = self.dispatch( elements[0] )
       do_stuff_that_needs_to_know_about_rest_of_set(current, elements)
       return current

or the like...

HTH,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/