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Editing: QuickStart.pod (4.2 KB)

=pod

=encoding utf-8

=for stopwords frobnicate greps regexps

=head1 NAME

Exporter::Tiny::Manual::QuickStart - the quickest way to get up and running with Exporter::Tiny

=head1 SYNOPSIS

   package MyUtils;
   
   use Exporter::Shiny qw( frobnicate );
   
   sub frobnicate {
      ...;   # your code here
   }
   
   1;

Now people can use your module like this:

   use MyUtils "frobnicate";
   
   frobnicate(42);

Or like this:

   use MyUtils "frobnicate" => { -as => "frob" };
   
   frob(42);

=head1 DESCRIPTION

See the synopsis. Yes, it's that simple.

=head2 Next steps

=head3 Default exports

Note that the module in the synopsis doesn't export anything by default.
If people load C<MyUtils> like this:

   use MyUtils;

Then they haven't imported any functions. You can specify a default set
of functions to be exported like this:

   package MyUtils;
   
   use Exporter::Shiny qw( frobnicate );
   
   our @EXPORT = qw( frobnicate );
   
   sub frobnicate { ... }
   
   1;

Or, if you want to be a superstar rock god:

   package MyUtils;
   
   use Exporter::Shiny our @EXPORT = qw( frobnicate );
   
   sub frobnicate { ... }
   
   1;

=head3 Tags

You can provide tags for people to use:

   package MyUtils;
   
   use Exporter::Shiny qw( frobnicate red green blue );
   
   our %EXPORT_TAGS = (
      utils   => [qw/ frobnicate /],
      colours => [qw/ red green blue /],
   );
   
   sub frobnicate { ... }
   sub red        { ... }
   sub green      { ... }
   sub blue       { ... }
   
   1;

And people can now import your functions like this:

   use MyUtils ":colours";

Or this:

   use MyUtils "-colours";

Or take advantage of the fact that Perl magically quotes barewords
preceded by a hyphen:

   use MyUtils -colours;

Two tags are automatically defined for you: C<< -default >> (which is
just the same as C<< @EXPORT >>) and C<< -all >> (which is the union of
C<< @EXPORT >> and C<< @EXPORT_OK >>). If you don't like them, then you
can override them:

   our %EXPORT_TAGS = (
      default => \@some_other_stuff,
      all     => \@more_stuff,
   );

=head3 Generators

Exporting normally just works by copying a sub from your package into
your caller's package. But sometimes it's useful instead to generate
a I<custom> sub to insert into your caller's package. This is pretty
easy to do.

   package MyUtils;
   
   use Exporter::Shiny qw( frobnicate );
   
   sub _generate_frobnicate {
      my $me     = shift;
      my $caller = caller;
      my ($name, $args) = @_;
      
      return sub {
          ...;  # your code here
      };
   }
   
   1;

The parameter C<< $me >> here is a string containing the package name
which is being imported from; C<< $caller >> is the destination package;
C<< $name >> is the name of the sub (in this case "frobnicate"); and
C<< $args >> is a hashref of custom arguments for this function.

   # The hashref { foo => 42 } is $args above.
   #
   use MyUtils "frobnicate" => { foo => 42 };

=head2 Avoiding Exporter::Shiny

Exporter::Shiny is a tiny shim around Exporter::Tiny. It should mostly
do what you want, but you may sometimes prefer to use Exporter::Tiny
directly.

The example in the synopsis could have been written as:

   package MyUtils;
   
   use parent "Exporter::Tiny";
   our @EXPORT_OK = qw( frobnicate );
   
   sub frobnicate {
      ...;   # your code here
   }
   
   1;

What Exporter::Shiny does is mostly just to set C<< @EXPORT_OK >> for
you and set up inheritance from the base class (Exporter::Tiny).

Exporter::Shiny also sets C<< $INC{'MyUtils.pm} >> for you, which in
usually makes little difference, but is useful in some edge cases.

=head1 SEE ALSO

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

For more advanced information, see
L<Exporter::Tiny::Manual::Exporting>.

=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.