http://www.w3.org/Bugs/Public/show_bug.cgi?id=5332 --- Comment #22 from Jonathan Robie <jonathan.robie@redhat.com> 2009-04-28 13:32:27 --- I can see that I need to at least add this: A non-empty parenthesized expression is a vacuous expression if the expression it contains is a vacuous expression. Are there other cases that I am missing? If not, how about this: <snip> The following expressions are defined by this specification to be "vacuous expressions": * A call to the built-in function fn:error is a vacuous expression. * An empty parenthesized expression ( ) is a vacuous expression. * A non-empty parenthesized expression is a vacuous expression if the expression it contains is a vacuous expression. * If all branches are vacuous expressions, the typeswitch expression is a vacuous expression. * If both branches are vacuous expressions, the conditional expression is a vacuous expression. * If all operands are vacuous expressions, the comma expression is a vacuous expression. These expressions can be determined statically to always return an empty sequence or raise an error. </snip> -- Configure bugmail: http://www.w3.org/Bugs/Public/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug.Received on Tuesday, 28 April 2009 13:32:35 UTC
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