[Bug 5696] [XQuery 1.1] Feature request to aid static typing

http://www.w3.org/Bugs/Public/show_bug.cgi?id=5696


Michael Dyck <jmdyck@ibiblio.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jmdyck@ibiblio.org




--- Comment #2 from Michael Dyck <jmdyck@ibiblio.org>  2008-10-25 18:51:52 ---
(In reply to comment #0)
>
> Option 3
> --------
> 
> We could fix this query by using XQuery 1.1 try/catch.
> 
> ".=$arg2" would have to be expanded out manually to "some" expressions
> with a try/catch to return "false" when the XPST0004 is raised.
> 
> This would be rather clumsy.

I don't understand why you'd need to expand to 'some' expressions.
Why not just replace
    .=$arg2
with
    try { .=$arg2 } catch err:XPTY0004 { false() }

Or, for better encapsulation, replace it with
    my-equal(., $arg2)
where 'my-equal' has the semantics that Option 1 would give to '=':
    declare function my-equal(...) as boolean()
    {
        try { $arg1 = $arg2 } catch err:XPTY0004 { false() }
    }


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