[XSL-LIST Mailing List Archive Home] [By Thread] [By Date]

Re: [xsl] Any way to specify diagnostic message for missing stylesheet parameter?


Subject: Re: [xsl] Any way to specify diagnostic message for missing stylesheet parameter?
From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 15 Oct 2014 17:12:43 -0000

For flexibility one could specify a "NeverWillActuallyBePassed" value
as the default value of the parameter, then check for this value and
issue error messages.

Or, define the type of the parameter as a union of the desired type
and an (your defined) "error type" and specify the default as a value
having the error type. This is similar to the above approach, but is
more general and won't require the developer to invent a multitude of
NeverWillActuallyBePassed values for each possible type.

Cheers,
Dimitre

On Wed, Oct 15, 2014 at 10:00 AM, David Sewell dsewell@xxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> Right... and actually that's probably the only way to provide full custom
> diagnostics in a case where you have more than one required parameter,
> because with @required="true" the first missing parameter will trigger a
> run-time error and the subsequent ones won't be checked.
>
> So it's probably not that useful a potential feature to enable a custom
> message on error for required stylesheet parameters.
>
> David
>
>
> On Wed, 15 Oct 2014, Eliot Kimber ekimber@xxxxxxxxxxxx wrote:
>
>> Make the param not be required and then check for it in a root template.
>>
>> Cheers,
>>
>> E.
>> bbbbb
>> Eliot Kimber, Owner
>> Contrext, LLC
>> http://contrext.com
>>
>>
>>
>>
>> On 10/15/14, 11:19 AM, "David Sewell dsewell@xxxxxxxxxxxx"
>> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>>> Given a stylesheet parameter <xsl:param name="somevar" required="yes"/>,
>>> failing to supply a parameter value at run-time results in a boilerplate
>>> error
>>> message such as "XTDE0050: No value supplied for required parameter
>>> somevar".
>>>
>>> It would be helpful to be able to supply a custom error message such
>>> as "required: somevar=[true|false|unknown]" to save the user the time it
>>> takes
>>> to look through the code to figure out what parameter is expected.
>>> There's no
>>> way to do this in the XSLT spec through 3.0, correct? and no common
>>> extensions
>>> for doing it?
>>>
>>> If not, would that be a useful feature for others, or are there reasons
>>> not to
>>> implement something like that as an extension or enhancement?
>>>
>>> David
>>>
>>> --
>>> David Sewell, Editorial and Technical Manager
>>> ROTUNDA, The University of Virginia Press
>>> PO Box 400314, Charlottesville, VA 22904-4314 USA
>>> Email: dsewell@xxxxxxxxxxxx   Tel: +1 434 924 9973
>>> Web: http://rotunda.upress.virginia.edu/
>>>
>>>
>>
>>
>
> --
> David Sewell, Editorial and Technical Manager
> ROTUNDA, The University of Virginia Press
> PO Box 400314, Charlottesville, VA 22904-4314 USA
> Email: dsewell@xxxxxxxxxxxx   Tel: +1 434 924 9973
> Web: http://rotunda.upress.virginia.edu/


Current Thread
Keywords