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Editing: Constants.pm
#============================================================= -*-Perl-*- # # Template::Constants.pm # # DESCRIPTION # Definition of constants for the Template Toolkit. # # AUTHOR # Andy Wardley <abw@wardley.org> # # COPYRIGHT # Copyright (C) 1996-2022 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. # #============================================================================ package Template::Constants; require Exporter; use strict; use warnings; use Exporter; use base qw( Exporter ); our ( @EXPORT_OK, %EXPORT_TAGS ); our ( $DEBUG_OPTIONS, @STATUS, @ERROR, @CHOMP, @DEBUG, @ISA ); our $VERSION = '3.100'; #======================================================================== # ----- EXPORTER ----- #======================================================================== # STATUS constants returned by directives use constant STATUS_OK => 0; # ok use constant STATUS_RETURN => 1; # ok, block ended by RETURN use constant STATUS_STOP => 2; # ok, stopped by STOP use constant STATUS_DONE => 3; # ok, iterator done use constant STATUS_DECLINED => 4; # ok, declined to service request use constant STATUS_ERROR => 255; # error condition # ERROR constants for indicating exception types use constant ERROR_RETURN => 'return'; # return a status code use constant ERROR_FILE => 'file'; # file error: I/O, parse, recursion use constant ERROR_VIEW => 'view'; # view error use constant ERROR_UNDEF => 'undef'; # undefined variable value used use constant ERROR_PERL => 'perl'; # error in [% PERL %] block use constant ERROR_FILTER => 'filter'; # filter error use constant ERROR_PLUGIN => 'plugin'; # plugin error # CHOMP constants for PRE_CHOMP and POST_CHOMP use constant CHOMP_NONE => 0; # do not remove whitespace use constant CHOMP_ALL => 1; # remove whitespace up to newline use constant CHOMP_ONE => 1; # new name for CHOMP_ALL use constant CHOMP_COLLAPSE => 2; # collapse whitespace to a single space use constant CHOMP_GREEDY => 3; # remove all whitespace including newlines # DEBUG constants to enable various debugging options use constant DEBUG_OFF => 0; # do nothing use constant DEBUG_ON => 1; # basic debugging flag use constant DEBUG_UNDEF => 2; # throw undef on undefined variables use constant DEBUG_VARS => 4; # general variable debugging use constant DEBUG_DIRS => 8; # directive debugging use constant DEBUG_STASH => 16; # general stash debugging use constant DEBUG_CONTEXT => 32; # context debugging use constant DEBUG_PARSER => 64; # parser debugging use constant DEBUG_PROVIDER => 128; # provider debugging use constant DEBUG_PLUGINS => 256; # plugins debugging use constant DEBUG_FILTERS => 512; # filters debugging use constant DEBUG_SERVICE => 1024; # context debugging use constant DEBUG_ALL => 2047; # everything # extra debugging flags use constant DEBUG_CALLER => 4096; # add caller file/line use constant DEBUG_FLAGS => 4096; # bitmask to extract flags $DEBUG_OPTIONS = { &DEBUG_OFF => off => off => &DEBUG_OFF, &DEBUG_ON => on => on => &DEBUG_ON, &DEBUG_UNDEF => undef => undef => &DEBUG_UNDEF, &DEBUG_VARS => vars => vars => &DEBUG_VARS, &DEBUG_DIRS => dirs => dirs => &DEBUG_DIRS, &DEBUG_STASH => stash => stash => &DEBUG_STASH, &DEBUG_CONTEXT => context => context => &DEBUG_CONTEXT, &DEBUG_PARSER => parser => parser => &DEBUG_PARSER, &DEBUG_PROVIDER => provider => provider => &DEBUG_PROVIDER, &DEBUG_PLUGINS => plugins => plugins => &DEBUG_PLUGINS, &DEBUG_FILTERS => filters => filters => &DEBUG_FILTERS, &DEBUG_SERVICE => service => service => &DEBUG_SERVICE, &DEBUG_ALL => all => all => &DEBUG_ALL, &DEBUG_CALLER => caller => caller => &DEBUG_CALLER, }; @STATUS = qw( STATUS_OK STATUS_RETURN STATUS_STOP STATUS_DONE STATUS_DECLINED STATUS_ERROR ); @ERROR = qw( ERROR_FILE ERROR_VIEW ERROR_UNDEF ERROR_PERL ERROR_RETURN ERROR_FILTER ERROR_PLUGIN ); @CHOMP = qw( CHOMP_NONE CHOMP_ALL CHOMP_ONE CHOMP_COLLAPSE CHOMP_GREEDY ); @DEBUG = qw( DEBUG_OFF DEBUG_ON DEBUG_UNDEF DEBUG_VARS DEBUG_DIRS DEBUG_STASH DEBUG_CONTEXT DEBUG_PARSER DEBUG_PROVIDER DEBUG_PLUGINS DEBUG_FILTERS DEBUG_SERVICE DEBUG_ALL DEBUG_CALLER DEBUG_FLAGS ); @EXPORT_OK = ( @STATUS, @ERROR, @CHOMP, @DEBUG ); %EXPORT_TAGS = ( 'all' => [ @EXPORT_OK ], 'status' => [ @STATUS ], 'error' => [ @ERROR ], 'chomp' => [ @CHOMP ], 'debug' => [ @DEBUG ], ); sub debug_flags { my ($self, $debug) = @_; my (@flags, $flag, $value); $debug = $self unless defined($debug) || ref($self); if ( $debug !~ tr{0-9}{}c) { foreach $flag (@DEBUG) { next if $flag eq 'DEBUG_OFF' || $flag eq 'DEBUG_ALL' || $flag eq 'DEBUG_FLAGS'; # don't trash the original substr($flag,0,6,'') if index($flag,'DEBUG_') == 0; $flag = lc $flag; return $self->error("no value for flag: $flag") unless defined($value = $DEBUG_OPTIONS->{ $flag }); $flag = $value; if ($debug & $flag) { $value = $DEBUG_OPTIONS->{ $flag }; return $self->error("no value for flag: $flag") unless defined $value; push(@flags, $value); } } return wantarray ? @flags : join(', ', @flags); } else { @flags = split(/\W+/, $debug); $debug = 0; foreach $flag (@flags) { $value = $DEBUG_OPTIONS->{ $flag }; return $self->error("unknown debug flag: $flag") unless defined $value; $debug |= $value; } return $debug; } } 1; __END__ =head1 NAME Template::Constants - Defines constants for the Template Toolkit =head1 SYNOPSIS use Template::Constants qw( :status :error :all ); =head1 DESCRIPTION The C<Template::Constants> modules defines, and optionally exports into the caller's namespace, a number of constants used by the L<Template> package. Constants may be used by specifying the C<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 C<use Template::Constants> statement: use Template::Constants qw( STATUS_DECLINED ); print STATUS_DECLINED; Alternatively, one of the following tagset identifiers may be specified to import sets of constants: 'C<:status>', 'C<:error>', 'C<:all>'. use Template::Constants qw( :status ); print STATUS_DECLINED; Consult the documentation for the C<Exporter> module for more information on exporting variables. =head1 EXPORTABLE TAG SETS The following tag sets and associated constants are defined: :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. '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 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. =head1 AUTHOR Andy Wardley E<lt>abw@wardley.orgE<gt> L<http://wardley.org/> =head1 COPYRIGHT Copyright (C) 1996-2022 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. =head1 SEE ALSO L<Template>, C<Exporter> =cut # Local Variables: # mode: perl # perl-indent-level: 4 # indent-tabs-mode: nil # End: # # vim: expandtab shiftwidth=4:
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