I've got some code where I create an HTML::Template object at the top, and then later on, may want to use the options loop_context_vars or global_vars depending on conditionals.

There's nothing in the POD about doing it that, way. But by dumping the HTML::Template object, I could see that these could be accessed like this: 

$t->{options}->{loop_context_vars} = 1;
$t->{options}->{global_vars}       = 1;

[download]
interestingly, it works for loop_context_vars but not global_vars

Is there a reason for this? Can I do it a different way? Or alternatively, should I just turn them both on, even if they're not needed, and not try and do it conditionally? I was just being naturally conservative about turning on features which wouldn't be needed, that's all. Is there any kind of speed or performance implication to using these features?

Example code: 

use HTML::Template;
$t = HTML::Template->new(
  filehandle => *DATA, 
  die_on_bad_params => 0 );
$t->{options}->{loop_context_vars} = 1;
# turned on so I can use <tmpl_if name="__first__">
$t->{options}->{global_vars} = 1;
# turned on so I can have a global var appear inside a loop
$t->param( foo => [ { baz => 1 }, { baz => 2 }, { baz => 3 } ] );
# some loop data
$t->param( bar => 'global var!' );
# a global variable
print $t->output();
__DATA__
<tmpl_loop name="foo">
  <tmpl_var name="bar"> <!-- this doesn't appear -->
  <tmpl_if name="__first__">
    first!
  </tmpl_if>
 * <tmpl_var name="baz">
</tmpl_loop>

[download]

In reply to Setting HTML::Template options after new() by Cody Fendant

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