[Bug 5332] [UPD] Parentheses around () or fn:error()

http://www.w3.org/Bugs/Public/show_bug.cgi?id=5332





--- Comment #10 from zhen hua liu <zhen.liu@oracle.com>  2009-02-06 19:47:28 ---
in your comment #9, consider the xquery dev env where modules can be compiled
and linked separately, without having 'vacuous' as keyword to describe a
function,
how could static analysis to determine the following expr is legal or not:

import module namespace md = "http://foo.com"
if ($a) then delete $x/a/b else md:raiseErr()

>From the function signature of md:raiseErr() , I only know it is a simple
expression, but I don't know if it is really vacuous or not and the source code
for module "http//foo.com" is not available.



I agree that determination of vacuous expression has to be done statically.
However, depending on how sophisticated your static analysis is, the
interoperability is not guaranteed.


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