Yes. Anything with "else" semantics is needed badly.
Jarek
----- Original Message -----
From: "Gert Driesen" <[EMAIL PROTECTED]>
To: "Jaroslaw Kowalski" <[EMAIL PROTECTED]>
Cc: "Nick Zigomanis" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Thursday, September 16, 2004 9:07 AM
Subject: Re: [Nant-users] dynamic properties and functions
> Hi Jarek,
>
> I think we should add a <choose> task (similar to the xsl:choose) as soon
as
> possible, I think I'd prefer that over your proposal (although both could
> ofcourse coexist).
>
> <choose>
> <when test="condition1">
> ...
> </when>
> <when test="condition2">
> ...
> </when>
> <otherwise>
> ...
> </otherwise>
> </choose>
>
> What do you think ?
>
> Gert
>
> ----- Original Message -----
> From: "Jaroslaw Kowalski" <[EMAIL PROTECTED]>
> To: "Gert Driesen" <[EMAIL PROTECTED]>
> Cc: "Nick Zigomanis" <[EMAIL PROTECTED]>;
> <[EMAIL PROTECTED]>
> Sent: Thursday, September 16, 2004 9:00 AM
> Subject: Re: [Nant-users] dynamic properties and functions
>
>
> > It should be possible to use the if() operator:
> >
> > <property name="idl.out.dir" value="${
> > if(string::contains(this.idl, 'Source\Data'),
> > bin.root + '\Data',
> > if (string::contains(this.idl, 'Source\Common'),
> > bin.root + '\Common',
> > ''))
> > }" dynamic="true" />
> >
> > The semantics of if(a,b,c) is: "if a=True then b else c" which is
exactly
> > what "a ? b : c" operator from C/C++/C#.
> >
> > Gert, what do you think of extending it to (backward compatible):
> >
> > if (condition1,result1,condition2,result2, ..., conditionN,resultN,
> > otherwise)
> >
> > Other ideas (language constructs):
> >
> > ${if a then b else c}
> > ${choose
> > when condition1 then result1
> > when condition2 then result2
> > ...
> > when conditionN then resultN
> > otherwise resultOtherwise}
> > Jarek
> >
> > Gert Driesen wrote:
> >
> >> Nick,
> >>
> >> The "if" condition is evaluated, not the value of the property.
> >>
> >> Gert
> >>
> >> ----- Original Message ----- From: "Nick Zigomanis"
> >> <[EMAIL PROTECTED]>
> >> To: <[EMAIL PROTECTED]>
> >> Sent: Thursday, September 16, 2004 7:06 AM
> >> Subject: [Nant-users] dynamic properties and functions
> >>
> >>
> >> Hi all,
> >>
> >>
> >>
> >> I'm trying to set dynamic properties in my build file as shown below:
> >>
> >>
> >>
> >> <property name="idl.out.dir" value="${bin.root}\Common" dynamic="true"
> >> if="${string::contains(this.idl, 'Source\Common'}" />
> >>
> >> <property name="idl.out.dir" value="${bin.root}\Data" dynamic="true"
> >> if="${string::contains(this.idl, 'Source\Data'}" />
> >>
> >>
> >>
> >> Essentially, all idl's under a specific source hierarchy (which is
> >> tested by the string::contains function) are compiled to a single bin
> >> directory.
> >>
> >>
> >>
> >> However, in doing the above, I get the following error when running the
> >> build script:
> >>
> >>
> >>
> >> Property evaluation failed.
> >>
> >> Expression: ${string::contains(this.idl, 'Source\Common'}
> >>
> >> ^^^^^^^^
> >>
> >> Property 'this.idl' has not been set.
> >>
> >>
> >>
> >> It seems that even though a dynamic property is specified, the function
> >> tries to do an evaluation even before the property is being used, i.e.,
> >> in this case, it is not dynamic.
> >>
> >>
> >>
> >> Can anyone confirm this, or point out any problems in my approach, or
> >> possibly, a better way to do this.
> >
> >
> >
> >
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