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=head1 NAME

Exporter::Tiny::Manual::Etc - odds and ends

=head1 DESCRIPTION

=head2 Utility Functions

Exporter::Tiny is itself an exporter!

These functions are really for internal use, but can be exported if you
need them:

=over

=item C<< mkopt(\@array) >>

Similar to C<mkopt> from L<Data::OptList>. It doesn't support all the
fancy options that Data::OptList does (C<moniker>, C<require_unique>,
C<must_be> and C<name_test>) but runs about 50% faster.

=item C<< mkopt_hash(\@array) >>

Similar to C<mkopt_hash> from L<Data::OptList>. See also C<mkopt>.

=back

=head2 History

L<Type::Library> had a bunch of custom exporting code which poked coderefs
into its caller's stash. It needed this to be something more powerful than
most exporters so that it could switch between exporting Moose, Mouse and
Moo-compatible objects on request. L<Sub::Exporter> would have been capable,
but had too many dependencies for the Type::Tiny project.

Meanwhile L<Type::Utils>, L<Types::TypeTiny> and L<Test::TypeTiny> each
used the venerable L<Exporter.pm|Exporter>. However, this meant they were
unable to use the features like L<Sub::Exporter>-style function renaming
which I'd built into Type::Library:

   ## import "Str" but rename it to "String".
   use Types::Standard "Str" => { -as => "String" };

And so I decided to factor out code that could be shared by all Type-Tiny's
exporters into a single place: Exporter::TypeTiny.

As of version 0.026, Exporter::TypeTiny was also made available as
L<Exporter::Tiny>, distributed independently on CPAN. CHOCOLATEBOY had
convinced me that it was mature enough to live a life of its own.

As of version 0.030, Type-Tiny depends on Exporter::Tiny and
Exporter::TypeTiny is being phased out.

=head2 Obligatory Exporter Comparison

Exporting is unlikely to be your application's performance bottleneck, but
nonetheless here are some comparisons.

B<< Comparative sizes according to L<Devel::SizeMe>: >>

   Exporter                     217.1Kb
   Sub::Exporter::Progressive   263.2Kb
   Exporter::Tiny               267.7Kb
   Exporter + Exporter::Heavy   281.5Kb
   Exporter::Renaming           406.2Kb
   Sub::Exporter                701.0Kb

B<< Performance exporting a single sub: >>

              Rate     SubExp    ExpTiny SubExpProg      ExpPM
SubExp      2489/s         --       -56%       -85%       -88%
ExpTiny     5635/s       126%         --       -67%       -72%
SubExpProg 16905/s       579%       200%         --       -16%
ExpPM      20097/s       707%       257%        19%         --

(Exporter::Renaming globally changes the behaviour of Exporter.pm, so could
not be included in the same benchmarks.)

B<< (Non-Core) Dependencies: >>

   Exporter                    -1
   Exporter::Renaming           0
   Exporter::Tiny               0
   Sub::Exporter::Progressive   0
   Sub::Exporter                3

B<< Features: >>

                                      ExpPM   ExpTiny SubExp  SubExpProg
 Can export code symbols............. Yes     Yes     Yes     Yes      
 Can export non-code symbols......... Yes                              
 Groups/tags......................... Yes     Yes     Yes     Yes      
 Export by regexp.................... Yes     Yes                      
 Bang prefix......................... Yes     Yes                      
 Allows renaming of subs.............         Yes     Yes     Maybe    
 Install code into scalar refs.......         Yes     Yes     Maybe    
 Can be passed an "into" parameter...         Yes     Yes     Maybe    
 Can be passed an "installer" sub....         Yes     Yes     Maybe    
 Config avoids package variables.....                 Yes              
 Supports generators.................         Yes     Yes              
 Sane API for generators.............         Yes     Yes              
 Unimport............................         Yes                      

(Certain Sub::Exporter::Progressive features are only available if
Sub::Exporter is installed.)

=head1 SEE ALSO

L<Exporter::Shiny>,
L<Exporter::Tiny>.

=head1 AUTHOR

Toby Inkster E<lt>tobyink@cpan.orgE<gt>.

=head1 COPYRIGHT AND LICENCE

This software is copyright (c) 2013-2014, 2017 by Toby Inkster.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=head1 DISCLAIMER OF WARRANTIES

THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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