I wasn't 100% clear on what you needed to do. This is my guess at what you were asking for. If this isn't it let me know. An example would be most helpful if this wasn't what you needed.

perl code 
sub ContextString
{
   my $context = shift();
   
   if($context eq "foo")
   {
      return "String 1";
   }
   elsif($context eq "bar")
   {
      return "String 2";
   }
}

my $t_vars = {
               context_sub => \&ContextString,
               other => "mmm donuts",
             };

# config opts are whatever you need them to be
my $template = Template->new($config_opts);

$template->process("template_file.tt",$t_vars) ||
   die $template->error();

[download]
now for the template code 
.
.
.
[% context = "bar" %]
[% IF context %]
  Message: [% context_sub(context) %]
[% END %]
.
.
.

[download]
in this case the template would be 
Message: String 2

[download]

In reply to Re: An Idea for a New Template Toolkit Improvement(?) by amw1
in thread An Idea for a New Template Toolkit Improvement(?) by monsieur_champs

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.