Re: Whose error is it anyway

There is a type declaration of map(xs:string,xs:string) on the map
$actions. So if a zero length key or value showed up..........

On Sat, Aug 15, 2020 at 3:43 PM Ihe Onwuka <[email protected]> wrote:

> The value of $action as at time of error contained a forward slash.
>
> I can recreate and answer any other questions that may follow now.
>
> On Fri, Aug 14, 2020 at 5:09 PM Trevor Nash <[email protected]> wrote:
>
>> Does the inconsistency with \W and \s mean that
>> {map:get($actions,$action)} could evaluate to empty exactly as the (second)
>> error message suggests?  In other words the match expression does not
>> guarantee that $action is found in the map.
>>
>> Trevor
>> On 14/08/2020 13:54, Ihe Onwuka wrote:
>>
>> I have since changed the code but this is the rest of the template rule
>> but trying to reconstruct it
>>
>> <xsl:template
>> match="*[map:contains($actions,tokenize(.,'\W')[1][matches(.,'\i\c*')])]">
>>       <xsl:variable name="action" as="xs:string+"
>> select="tokenize(.,'\s')[1]"/>
>>       <xsl:copy>
>>          <xsl:variable name="encodedAction">
>>              <xsl:element
>> name="{map:get($actions,$action)}">{normalize-space(substring-after(.,$action))}</xsl:element>
>>          </xsl:variable>
>>          <xsl:apply-templates select="$encodedAction"/>
>>       </xsl:copy>
>>    </xsl:template>
>>
>> Note an error I overlooked - the first tokenize used '\W' and the second
>> '\s' which led to the situation.
>>
>> I wasn't going to mention this but now that I have pasted the whole code
>> when I corrected the 2nd tokenize to '\W'  the transform threw a bash shell
>> error (invalid fork argument)
>>
>>
>>
>>
>> On Fri, Aug 14, 2020 at 8:46 AM Ihe Onwuka <[email protected]> wrote:
>>
>>> line 67
>>> <xsl:element
>>> name="{map:get($actions,$action)}">{normalize-space(substring-after(.,$action))}</xsl:element>
>>>
>>> where the @name did not evaluate to a valid XML name.
>>>
>>> On Fri, Aug 14, 2020 at 8:20 AM Michael Kay <mike-JkSD5nQpfvpWk0Htik3J/[email protected]> wrote:
>>>
>>>> What's on line 67? Is it the declaration of global variable $actions?
>>>> Otherwise, I can't see why evaluating this pattern should result in a call
>>>> on xsl:element.
>>>>
>>>> Michael Kay
>>>> Saxonica
>>>>
>>>> On 14 Aug 2020, at 13:04, Ihe Onwuka <[email protected]> wrote:
>>>>
>>>> Happened again.
>>>>
>>>> My code. <xsl:template
>>>> match="*[map:contains($actions,tokenize(.,'\W')[1][matches(.,'\i\c*')])]">
>>>>
>>>> Clearly it doesn't like the zero length string.
>>>>
>>>> Warning at char 1 in xsl:template/@match on line 63 column 92 of
>>>> *****.xsl:
>>>>   XPTY0004  An error occurred matching pattern
>>>>   {element()[Q{
>>>> http://www.w3.org/2005/xpath-functions/map}contains($actions,
>>>>   exactly-one((first(tokenize(convertUntyped(data(.)), "\W",
>>>> "")))[matches(., "\i\c*", "")]))]}:
>>>> Error at char 9 in expression in xsl:element/@name on line 67 column 55
>>>> of ******.xsl:
>>>>   XTDE0820  Supplied element name is a zero-length string
>>>>
>>>> On Thu, Aug 13, 2020 at 6:40 PM Ihe Onwuka <[email protected]>
>>>> wrote:
>>>>
>>>>> I tried but cannot reconstruct a snippet that reproduces. The hint as
>>>>> to what happened in my use case was the best I could offer.
>>>>>
>>>>> On Thu, Aug 13, 2020 at 6:15 PM Michael Kay <mike-JkSD5nQpfvpWk0Htik3J/[email protected]> wrote:
>>>>>
>>>>>> If you post a repro that we can run, that's useful as we can examine
>>>>>> the error messages, see what's causing them, and test any improvements.
>>>>>> With only snippets like this, there's not really any effective action we
>>>>>> can take.
>>>>>>
>>>>>> Michael Kay
>>>>>> Saxonica
>>>>>>
>>>>>> On 13 Aug 2020, at 18:53, Ihe Onwuka <[email protected]> wrote:
>>>>>>
>>>>>> I can tell you that the error went away when I eliminated the
>>>>>> possibility of the context element being empty. I struggle to correlate
>>>>>> that back to the error message that was displayed.
>>>>>>
>>>>>> On Thu, Aug 13, 2020 at 10:16 AM Graydon <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Both?  The hints about what the optimizer thinks is happening are
>>>>>>> useful right up until I can't tell where the error is.
>>>>>>>
>>>>>>> On August 13, 2020 1:40:48 PM UTC, Michael Kay <mike-JkSD5nQpfvpWk0Htik3J/[email protected]>
>>>>>>> wrote:
>>>>>>> >Yes, we should probably retain the original pattern as a string
>>>>>>> rather
>>>>>>> >than trying to reconstitute it from the compiled form.
>>>>>>> >
>>>>>>> >Michael Kay
>>>>>>> >Saxonica
>>>>>>> >
>>>>>>> >> On 13 Aug 2020, at 13:52, Ihe Onwuka <[email protected]>
>>>>>>> wrote:
>>>>>>> >>
>>>>>>> >> This is not my code.
>>>>>>> >>
>>>>>>> >> Warning at char 1 in xsl:template/@match on line 62 column 72 of
>>>>>>> >******.xsl:
>>>>>>> >>   XPTY0004  An error occurred matching pattern
>>>>>>> >>
>>>>>>> >{element()[Q{
>>>>>>> http://www.w3.org/2005/xpath-functions/map}contains($actions
>>>>>>> ><http://www.w3.org/2005/xpath-functions/map%7Dcontains($actions>,
>>>>>>> >>   exactly-one(first(tokenize(convertUntyped(data(.)), "\s",
>>>>>>> ""))))]}:
>>>>>>> >>
>>>>>>> >> My code was
>>>>>>> >>
>>>>>>> >>
>>>>>>> >>    <xsl:template
>>>>>>> >match="*[map:contains($actions,tokenize(.,'\s')[1])]">
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