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Sub::Exporter::Util(3)               User Contributed Perl Documentation              Sub::Exporter::Util(3)



NAME
       Sub::Exporter::Util - utilities to make Sub::Exporter easier

VERSION
       version 0.984

DESCRIPTION
       This module provides a number of utility functions for performing common or useful operations when
       setting up a Sub::Exporter configuration.  All of the utilites may be exported, but none are by
       default.

THE UTILITIES
   curry_method
         exports => {
           some_method => curry_method,
         }

       This utility returns a generator which will produce an invocant-curried version of a method.  In
       other words, it will export a method call with the exporting class built in as the invocant.

       A module importing the code some the above example might do this:

         use Some::Module qw(some_method);

         my $x = some_method;

       This would be equivalent to:

         use Some::Module;

         my $x = Some::Module->some_method;

       If Some::Module is subclassed and the subclass's import method is called to import "some_method", the
       subclass will be curried in as the invocant.

       If an argument is provided for "curry_method" it is used as the name of the curried method to export.
       This means you could export a Widget constructor like this:

         exports => { widget => curry_method('new') }

       This utility may also be called as "curry_class", for backwards compatibility.

   curry_chain
       "curry_chain" behaves like "curry_method", but is meant for generating exports that will call several
       methods in succession.

         exports => {
           reticulate => curry_chain([
             new => gather_data => analyze => [ detail => 100 ] => results
           ]),
         }

       If imported from Spliner, calling the "reticulate" routine will be equivalent to:

         Splinter->new->gather_data->analyze(detail => 100)->results;

       If any method returns something on which methods may not be called, the routine croaks.

       The arguments to "curry_chain" form an optlist.  The names are methods to be called and the
       arguments, if given, are arrayrefs to be dereferenced and passed as arguments to those methods.
       "curry_chain" returns a generator like those expected by Sub::Exporter.

       Achtung! at present, there is no way to pass arguments from the generated routine to the method
       calls.  This will probably be solved in future revisions by allowing the opt list's values to be
       subroutines that will be called with the generated routine's stack.

   merge_col
         exports => {
           merge_col(defaults => {
             twiddle => \'_twiddle_gen',
             tweak   => \&_tweak_gen,
           }),
         }

       This utility wraps the given generator in one that will merge the named collection into its args
       before calling it.  This means that you can support a "default" collector in multipe exports without
       writing the code each time.

       You can specify as many pairs of collection names and generators as you like.

   mixin_installer
         use Sub::Exporter -setup => {
           installer => Sub::Exporter::Util::mixin_installer,
           exports   => [ qw(foo bar baz) ],
         };

       This utility returns an installer that will install into a superclass and adjust the ISA importing
       class to include the newly generated superclass.

       If the target of importing is an object, the hierarchy is reversed: the new class will be ISA the
       object's class, and the object will be reblessed.

       Prerequisites: This utility requires that Package::Generator be installed.

   like
       It's a collector that adds imports for anything like given regex.

       If you provide this configuration:

         exports    => [ qw(igrep imap islurp exhausted) ],
         collectors => { -like => Sub::Exporter::Util::like },

       A user may import from your module like this:

         use Your::Iterator -like => qr/^i/; # imports igre, imap, islurp

       or

         use Your::Iterator -like => [ qr/^i/ => { -prefix => 'your_' } ];

       The group-like prefix and suffix arguments are respected; other arguments are passed on to the
       generators for matching exports.

AUTHOR
       Ricardo Signes <rjbs@cpan.org>

COPYRIGHT AND LICENSE
       This software is copyright (c) 2007 by Ricardo Signes.

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



perl v5.16.2                                     2012-06-05                           Sub::Exporter::Util(3)