presetdef vs. macrodef

["Stirling, Scott" <sc...@workscape.com>]

Hi,

I sort of get some of the differences between <presetdef> and <macrodef>, but I don't understand the motivation behind <presetdef>.  Can anyone explain why <presetdef> exists when we have <macrodef>?  It seems like they overlap, if <macrodef> doesn't actually subsume everything that <presetdef> can do.  Not knowing how the two came into existence, I don't understand the motivation, and am unsure why/when I should use <presetdef>.

Thank you,
Scott Stirling
Workscape

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Re: presetdef vs. macrodef

[Matt Benson <gu...@yahoo.com>]

I have played with, and like, both... <presetdef> is,
IMO, simpler to use but more limited... one use of
<presetdef> I think is interesting:  I have an antlib
that consists of several <presetdef>s of the <apply>
task with a particular executable and certain <arg>
elements set for each.  So in this case I got six
custom tasks for < 10 lines of XML each, with nested
filesets and up-to-date checking using nested
mappers...

Another interesting thing is that once you have
aliased a task using either <macrodef> or <presetdef>
it doesn't matter which it was, if they look
similar... see
http://nagoya.apache.org/wiki/apachewiki.cgi?NewAntFeaturesInDetail/PresetDef
for a simple example of what I'm talking about.

-Matt

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