Template::Namespace::Constants - Compile time constant folding

       Andy Wardley <abw@wardley.org> <http://wardley.org/>

       Copyright (C) 1996-2007 Andy Wardley.  All Rights Reserved.

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.

       The "Template::Namespace::Constants" module implements a namespace handler which is plugged into the
       "Template::Directive" compiler module.  This then performs compile time constant folding of variables in
       a particular namespace.

new(\%constants)
       The new() constructor method creates and returns a reference to a new Template::Namespace::Constants
       object.  This creates an internal stash to store the constant variable definitions passed as arguments.

           my $handler = Template::Namespace::Constants->new({
               pi => 3.14,
               e  => 2.718,
           });

   ident(\@ident)
       Method called to resolve a variable identifier into a compiled form.  In this case, the method fetches
       the corresponding constant value from its internal stash and returns it.

       Template::Namespace::Constants - Compile time constant folding

       Template::Directive

perl v5.40.0                                       2024-10-20                Template::Namespace::Constants(3pm)

           # easy way to define constants
           use Template;

           my $tt = Template->new({
               CONSTANTS => {
                   pi => 3.14,
                   e  => 2.718,
               },
           });

           # nitty-gritty, hands-dirty way
           use Template::Namespace::Constants;

           my $tt = Template->new({
               NAMESPACE => {
                   constants => Template::Namespace::Constants->new({
                       pi => 3.14,
                       e  => 2.718,
                   },
               },
           });