I actually still prefer using the ${foo} syntax as :
- its easier to distinguish properties (as Ian originally said)
- it won't break compatibility for properties with numeric names (eg ${123})
- corresponds with the MSbuild implementation. (not that this is importantà
- XSLT also uses a ($) prefix for variables
I also don't think we should use lt, gt, ... instead of ==, > for operators,
both XSLT and MSBuild use similar operators ... so I don't see why we should
be different ...
In my opinion, it would be better to combine the best of XSLT and MSbuild
expressions, and try to be "compatibile" with these where it makes sense and
were these's no added value for not being compatible ... (eg. use the same
functions names, operators, ...)
Just my 2 cents ..
Gert
----- Original Message -----
From: "Ian MacLean" <[EMAIL PROTECTED]>
To: "Jaroslaw Kowalski" <[EMAIL PROTECTED]>
Cc: "Martin Aliger" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Wednesday, December 03, 2003 12:36 PM
Subject: Re: [nant-dev] PATCH: Expression evaluator for NAnt
> You've convinced me. It works for backwards compatibility too as you can
> think of the older type of property ${foo} as an expression containing a
> single identifier and so the result of the expression is the value of
> that identifier.
>
> good work Jarek. Do you want me to commit this to the branch ? or will
> you do it ?
>
> Ian
>
> >Ian,
> >
> >Be sure to check my test1 release of EE. I've implemented the syntax
> >suggested by Martin and I cannot live without it any more. It's
ultra-clean,
> >doesn't break builds (hopefully) and works for all attributes regardless
of
> >their type.
> >
> >One more argument for allowing properties in expressions to be written
> >without "$": Compare:
> >
> ><echo message="aaa" if="${endswith(${somefilename},${extension})}" />
> >
> >with
> >
> ><echo message="aaa" if="${endswith(somefilename,extension)}" />
> >
> >The ugliness factor is close to zero in the latter case, IMHO.
> >
> >Jarek
> >
> >----- Original Message -----
> >From: "Ian MacLean" <[EMAIL PROTECTED]>
> >To: "Jaroslaw Kowalski" <[EMAIL PROTECTED]>
> >Cc: "Martin Aliger" <[EMAIL PROTECTED]>;
> ><[EMAIL PROTECTED]>
> >Sent: Wednesday, December 03, 2003 7:01 AM
> >Subject: Re: [nant-dev] PATCH: Expression evaluator for NAnt
> >
> >
> >
> >
> >>I'd much prefer to see properties still distinguised by the $. Maybe the
> >>parser can easily determine that its a property but its not so clear for
> >>a user reading it. Especially since propertys everywhere else require
> >>the $ syntax.
> >>
> >>Ian
> >>
> >>Jaroslaw Kowalski wrote:
> >>
> >>
> >>
> >>>It's of course possible to distinguish between "property" and
> >>>
> >>>
> >"function()"
> >
> >
> >>>within the parser.
> >>>
> >>>The following interpretation of keywords is very easy to implement:
> >>>
> >>>keyword followed by "(" is a function call.
> >>>true/false are boolean literals
> >>>everything else denotes a property
> >>>
> >>>The following would be allowed then (should it be?):
> >>>
> >>><property name="length" value="aaaaaaaa" />
> >>><if test="length(length)=8">
> >>> <echo message="ok" />
> >>></if>
> >>>
> >>>Jarek
> >>>
> >>>
> >>>
> >>>-------------------------------------------------------
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> >>>
> >>>
> >>--
> >>Ian MacLean, Developer,
> >>ActiveState, a division of Sophos
> >>http://www.ActiveState.com
> >>
> >>
> >>
> >>
> >>-------------------------------------------------------
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> >>
> >
> >
> >
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>
> --
> Ian MacLean, Developer,
> ActiveState, a division of Sophos
> http://www.ActiveState.com
>
>
>
>
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