On Tuesday, April 9, 2013 8:00:40 AM UTC-5, jcbollinger wrote:
>
>
>
> On Monday, April 8, 2013 4:10:03 PM UTC-5, Shantanu wrote:
>>
>>
>> The parameterized classes guide mentions that a parameterized class is
>> declared using following syntax [1]:
>>
>> class {'classname': }
>>
>>
>> But the puppetlabs postgresql
>> module<https://github.com/puppetlabs/puppet-postgresql#setup>mentions that a
>> parameterized class '
>> postgresql::server<https://github.com/puppetlabs/puppet-postgresql/blob/master/manifests/server.pp>'
>>
>> can be declared using 'include' syntax [2].
>>
>> So is 'include' syntax supported for parameterized classes now?
>>
>>
> The 'include' function has always worked with parameterized classes. It
> just doesn't bind any parameter values to the named class. Indeed, the
> parameterized-style class declaration syntax is better viewed as a *parameter
> binding* syntax, with a side effect of declaring the class. That makes
> it a lot easier to understand its constraints -- principally, that if a
> parameterized-style class declaration is used, for a given class then it
> must be the first declaration of that class that is evaluated. (Any number
> of 'include' declarations may be used for the same class.)
>
> Using the 'include' function with parameterized classes makes especial
> sense when relying exclusively on Puppet 3's automated hiera-based data
> binding, because there is nothing but downside to using empty
> parameterized-style class declarations.
>
> Note, too, that you can use (empty) parameterized declarations for
> UNparameterized classes. But don't do that.
>
>
> John
>
>
>
Thanks for explaining it John. I have always used empty parameterized
declaration syntax. I had wrongly assumed that include won't work with it.
--
Shantanu
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