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From Peter Kl├╝gl <pklu...@uni-wuerzburg.de>
Subject Re: Problem writing ruta extensions
Date Sat, 07 Dec 2013 13:19:03 GMT
Am 05.12.2013 16:44, schrieb Alexandre Patry:
> On 2013-12-04 12:33, Sebastian wrote:
>> Hi,
>>
>> I'm highly interested in ruta, and its potential applications in 
>> industrial
>> applications. Right know I'm trying to create a simple toy condition
>> extension that is simply a case insensitive INLIST condition. It is
>> completely based on the InListCondition class, I also declared an
>> implementation of the IRutaConditionExtension interface.
>>
>> With primitve types everything seems to work great, except when the
>> condition is used with a variable :
>>
>> STRINGLIST MonthsList = {"january", ...};
>> DECLARE Month;
>> ANY{INSENSITIVEINLIST(MonthsList) -> MARK(Month)};
>>
>> I get a class cast exception when the condition is being created, 
>> because
>> MonthsList is a SimpleTypeExpression and I'm expecting a 
>> StringListExpression.
>>
>> Am I doing something wrong ? I suppose there is a way to resolve the
>> variable to the actual list, but I missed it somehow.
> It may not help you to get your toy extension working, but for small 
> lists I like to use regular expressions where case insensitiveness is 
> free:
>
> W{REGEXP("(?i)january|february|march|...|december") -> MARK(Month)}
>

Just wanted to mention that the REGEXP condition has also an optional 
argument for case-insensivity and there are also the simple regexp rules 
for such use cases, which ignore the filtering and the basic tokens.

Best,

Peter

> Regards,
>
> Alexandre
>


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