Re: [nant-dev] PATCH: Expression evaluator for NAnt

[Ian MacLean]

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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ActiveState, a division of Sophos
http://www.ActiveState.com



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