Re: [xml] Return type of the xpath query during the compilation of xpath

[Umesh Chandak <umeshc gslab com>]

Hi ,
      Is there any easy way to find out the last operation (function 
call, operator, location path) in xpath compilation ?
Because it can be easy to find out the return type from the last 
operation  being performed on xpath.

Thanks.
Regards,
Umesh
Daniel Veillard wrote:
> On Thu, May 29, 2008 at 01:17:35PM +0530, Umesh Chandak wrote:
>   
> > Thanks for the reply. Can you provide me some pointers for how I can do 
> > this without the variable in xpath.
> > Basically I want to determine the return type of xpath query is boolean, 
> > string , number or nodeset without the variable in xpath queries.
> >     
>
>   Like for any expression, the compiler build a tree out of it,
> you start from the leaves where you assume you can explicitely give the
> type and propagate the result up to the top of the tree. Explained
> in great details in any compiler book. The best is usually to build this
> up as the tree is built. But we have no type placeholder in XPath
> internal tree expressions, you would have to do this from scratch.
>
> Daniel
>
>