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package PERLANCAR::Exporter::Lite; |
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our $DATE = '2016-03-13'; # DATE |
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our $VERSION = '0.02'; # VERSION |
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# Be lean. |
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#use strict; |
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#use warnings; |
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sub import { |
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my $pkg0 = shift; |
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if (@_ && $_[0] eq 'import') { |
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my $exporter = caller; |
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*{"$exporter\::import"} = sub { |
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my $pkg = shift; |
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my $caller = caller; |
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my @exp = @_ ? @_ : @{"$exporter\::EXPORT"}; |
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for my $exp (@exp) { |
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unless (grep {$_ eq $exp} (@{"$exporter\::EXPORT"}, |
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@{"$exporter\::EXPORT_OK"})) { |
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die "$exp is not exported by $exporter"; |
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} |
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if ($exp =~ /\A\$(.+)/) { |
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*{"$caller\::$1"} = \${"$exporter\::$1"}; |
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} elsif ($exp =~ /\A\@(.+)/) { |
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*{"$caller\::$1"} = \@{"$exporter\::$1"}; |
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} elsif ($exp =~ /\A\%(.+)/) { |
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*{"$caller\::$1"} = \%{"$exporter\::$1"}; |
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} elsif ($exp =~ /\A\*(\w+)\z/) { |
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*{"$caller\::$1"} = *{"$exporter\::$1"}; |
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} elsif ($exp =~ /\A&?(\w+)\z/) { |
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*{"$caller\::$1"} = \&{"$exporter\::$1"}; |
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} else { |
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die "Invalid export '$exp'"; |
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} |
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} |
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}; |
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} |
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} |
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1; |
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# ABSTRACT: A stripped down Exporter |
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__END__ |
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=pod |
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=encoding UTF-8 |
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=head1 NAME |
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PERLANCAR::Exporter::Lite - A stripped down Exporter |
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=head1 VERSION |
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This document describes version 0.02 of PERLANCAR::Exporter::Lite (from Perl distribution PERLANCAR-Exporter-Lite), released on 2016-03-13. |
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=head1 SYNOPSIS |
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In F<lib/YourModule.pm>: |
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package YourModule; |
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use PERLANCAR::Exporter::Lite qw(import); |
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our @EXPORT = qw(...); |
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our @EXPORT_OK = qw(...); |
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=head1 DESCRIPTION |
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This is a stripped down exporter module, to achieve the smallest startup |
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overhead (see L<Bencher::Scenario::Exporters::Startup> for benchmark). This is |
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what I think L<Exporter::Lite> should be. |
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This module offers only some features of L<Exporter>: default exports via |
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C<@EXPORT> and optional exports via C<@EXPORT_OK>. You can only use this |
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exporter by importing its C<import> and not by subclassing. There is no support |
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for export tags, C<export_to_level>, etc. |
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=head1 HOMEPAGE |
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Please visit the project's homepage at L<https://metacpan.org/release/PERLANCAR-Exporter-Lite>. |
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=head1 SOURCE |
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Source repository is at L<https://github.com/perlancar/perl-PERLANCAR-Exporter-Lite>. |
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=head1 BUGS |
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Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=PERLANCAR-Exporter-Lite> |
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When submitting a bug or request, please include a test-file or a |
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patch to an existing test-file that illustrates the bug or desired |
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feature. |
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=head1 SEE ALSO |
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L<Exporter> |
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=head1 AUTHOR |
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perlancar <perlancar@cpan.org> |
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=head1 COPYRIGHT AND LICENSE |
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This software is copyright (c) 2016 by perlancar@cpan.org. |
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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=cut |