On Friday 04 January 2008, Ronald J Kimball wrote:
> I have a variable whose value I want to process as a template. How can
> I do this?
>
> I tried [% PROCESS var %], but that looks for a block or file named var.
>
> (The value is an error message that needs some substitution performed on
> it for display.)
There are two different cases that you can use.
If the variable contains a reference to a string, then you can use PROCESS.
I'm not sure if this was planned, but it certainly works.
perl -e 'use Template; Template::Alloy->new->process(\q{[% PROCESS $foo %]},
{foo => \"Hello [% 1 + 2 %]"})'
If the variable is not a string reference, but just contains the template
itself (which is the normal case), then use the "eval" filter (which is oddly
named and actually just processes the template).
perl -e 'use Template::Alloy; Template::Alloy->new->process(\q{[% foo |
eval %]}, {foo => "Hello [% 1 + 2 %]"})'
Both of these examples also work in Template::Alloy, but Template::Alloy will
cache the compiled versions based on the MD5 of the passed string (plus it
parses more quickly) so there isn't as much of a hit to using "eval".
Paul
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