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.IX Title "Template::Constants 3"
.TH Template::Constants 3 2023-07-25 "perl v5.38.0" "User Contributed Perl Documentation"
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.SH NAME
Template::Constants \- Defines constants for the Template Toolkit
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&    use Template::Constants qw( :status :error :all );
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
The \f(CW\*(C`Template::Constants\*(C'\fR modules defines, and optionally exports into the
caller's namespace, a number of constants used by the Template package.
.PP
Constants may be used by specifying the \f(CW\*(C`Template::Constants\*(C'\fR package
explicitly:
.PP
.Vb 2
\&    use Template::Constants;
\&    print Template::Constants::STATUS_DECLINED;
.Ve
.PP
Constants may be imported into the caller's namespace by naming them as
options to the \f(CW\*(C`use Template::Constants\*(C'\fR statement:
.PP
.Vb 2
\&    use Template::Constants qw( STATUS_DECLINED );
\&    print STATUS_DECLINED;
.Ve
.PP
Alternatively, one of the following tagset identifiers may be specified
to import sets of constants: '\f(CW\*(C`:status\*(C'\fR', '\f(CW\*(C`:error\*(C'\fR', '\f(CW\*(C`:all\*(C'\fR'.
.PP
.Vb 2
\&    use Template::Constants qw( :status );
\&    print STATUS_DECLINED;
.Ve
.PP
Consult the documentation for the \f(CW\*(C`Exporter\*(C'\fR module for more information
on exporting variables.
.SH "EXPORTABLE TAG SETS"
.IX Header "EXPORTABLE TAG SETS"
The following tag sets and associated constants are defined:
.PP
.Vb 7
\&    :status
\&        STATUS_OK             # no problem, continue
\&        STATUS_RETURN         # ended current block then continue (ok)
\&        STATUS_STOP           # controlled stop (ok)
\&        STATUS_DONE           # iterator is all done (ok)
\&        STATUS_DECLINED       # provider declined to service request (ok)
\&        STATUS_ERROR          # general error condition (not ok)
\&
\&    :error
\&        ERROR_RETURN          # return a status code (e.g. \*(Aqstop\*(Aq)
\&        ERROR_FILE            # file error: I/O, parse, recursion
\&        ERROR_UNDEF           # undefined variable value used
\&        ERROR_PERL            # error in [% PERL %] block
\&        ERROR_FILTER          # filter error
\&        ERROR_PLUGIN          # plugin error
\&
\&    :chomp                  # for PRE_CHOMP and POST_CHOMP
\&        CHOMP_NONE            # do not remove whitespace
\&        CHOMP_ONE             # remove whitespace to newline
\&        CHOMP_ALL             # old name for CHOMP_ONE (deprecated)
\&        CHOMP_COLLAPSE        # collapse whitespace to a single space
\&        CHOMP_GREEDY          # remove all whitespace including newlines
\&
\&    :debug
\&        DEBUG_OFF             # do nothing
\&        DEBUG_ON              # basic debugging flag
\&        DEBUG_UNDEF           # throw undef on undefined variables
\&        DEBUG_VARS            # general variable debugging
\&        DEBUG_DIRS            # directive debugging
\&        DEBUG_STASH           # general stash debugging
\&        DEBUG_CONTEXT         # context debugging
\&        DEBUG_PARSER          # parser debugging
\&        DEBUG_PROVIDER        # provider debugging
\&        DEBUG_PLUGINS         # plugins debugging
\&        DEBUG_FILTERS         # filters debugging
\&        DEBUG_SERVICE         # context debugging
\&        DEBUG_ALL             # everything
\&        DEBUG_CALLER          # add caller file/line info
\&        DEBUG_FLAGS           # bitmap used internally
\&
\&    :all
\&        All the above constants.
.Ve
.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, \f(CW\*(C`Exporter\*(C'\fR