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use Template::Constants qw( :status :error :all );


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The Template::Constants modules defines, and optionally exports into the caller's namespace, a number of constants used by the Template package.

Constants may be used by specifying the Template::Constants package explicitly:

use Template::Constants;
print Template::Constants::STATUS_DECLINED;

Constants may be imported into the caller's namespace by naming them as options to the use Template::Constants statement:

use Template::Constants qw( STATUS_DECLINED );

Alternatively, one of the following tagset identifiers may be specified to import sets of constants: ':status', ':error', ':all'.

use Template::Constants qw( :status );

Consult the documentation for the Exporter module for more information on exporting variables.


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The following tag sets and associated constants are defined:

    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_RETURN          # return a status code (e.g. 'stop')
    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_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 the above constants.


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Andy Wardley <>


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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.


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Template, Exporter last modified 12:50:49 30-Jul-2020
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