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.\" ========================================================================
.\"
.IX Title "Template::Namespace::Constants 3"
.TH Template::Namespace::Constants 3 "2024-06-21" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Template::Namespace::Constants \- Compile time constant folding
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    # 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,
\&            },
\&        },
\&    });
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \f(CW\*(C`Template::Namespace::Constants\*(C'\fR module implements a namespace handler
which is plugged into the \f(CW\*(C`Template::Directive\*(C'\fR compiler module.  This then
performs compile time constant folding of variables in a particular namespace.
.SH "METHODS"
.IX Header "METHODS"
.SS "new(\e%constants)"
.IX Subsection "new(%constants)"
The \fBnew()\fR 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.
.PP
.Vb 4
\&    my $handler = Template::Namespace::Constants\->new({
\&        pi => 3.14,
\&        e  => 2.718,
\&    });
.Ve
.SS "ident(\e@ident)"
.IX Subsection "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.
.SH "AUTHOR"
.IX Header "AUTHOR"
Andy Wardley <abw@wardley.org> <http://wardley.org/>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 1996\-2022 Andy Wardley.  All Rights Reserved.
.PP
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Template::Directive