[Bug 5672] Evaluation of treat as

http://www.w3.org/Bugs/Public/show_bug.cgi?id=5672





------- Comment #4 from mike@saxonica.com  2008-05-01 18:28 -------
Lazy evaluation of function parameters is an absolutely normal technique in
functional programming languages and is essential for good performance. Users
expect to be able to write a function like

declare function first($seq as item()*) as item() {
  $seq[1]
}

and have it behave the same as if they wrote $seq[1] directly.