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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 0.986

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 utilities 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:

	 Spliner->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
       multiple 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 v5.16.3				    2013-06-14			   Sub::Exporter::Util(3)
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