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Moose::Util(3pm) User Contributed Perl Documentation Moose::Util(3pm)
NAME
Moose::Util - Utilities for working with Moose classes
SYNOPSIS
use Moose::Util qw/find_meta does_role search_class_by_role/;
my $meta = find_meta($object) || die "No metaclass found";
if (does_role($object, $role)) {
print "The object can do $role!\n";
}
my $class = search_class_by_role($object, 'FooRole');
print "Nearest class with 'FooRole' is $class\n";
DESCRIPTION
This module provides a set of utility functions. Many of these functions are intended for
use in Moose itself or MooseX modules, but some of them may be useful for use in your own
code.
EXPORTED FUNCTIONS
find_meta($class_or_obj)
This method takes a class name or object and attempts to find a metaclass for the
class, if one exists. It will not create one if it does not yet exist.
does_role($class_or_obj, $role_name)
Returns true if $class_or_obj does the given $role_name.
The class must already have a metaclass for this to work.
search_class_by_role($class_or_obj, $role_name)
Returns the first class in the class's precedence list that does $role_name, if any.
The class must already have a metaclass for this to work.
apply_all_roles($applicant, @roles)
This function applies one or more roles to the given $applicant The applicant can be a
role name, class name, or object.
The $applicant must already have a metaclass object.
The list of @roles should be a list of names, each of which can be followed by an
optional hash reference of options ("-excludes" and "-alias").
ensure_all_roles($applicant, @roles)
This function is similar to "apply_all_roles", but only applies roles that $applicant
does not already consume.
get_all_attribute_values($meta, $instance)
Returns a hash reference containing all of the $instance's attributes. The keys are
attribute names.
get_all_init_args($meta, $instance)
Returns a hash reference containing all of the "init_arg" values for the instance's
attributes. The values are the associated attribute values. If an attribute does not
have a defined "init_arg", it is skipped.
This could be useful in cloning an object.
resolve_metaclass_alias($category, $name, %options)
resolve_metatrait_alias($category, $name, %options)
Resolves a short name to a full class name. Short names are often used when specifying
the "metaclass" or "traits" option for an attribute:
has foo => (
metaclass => "Bar",
);
The name resolution mechanism is covered in "Metaclass and Trait Name Resolution" in
Moose.
english_list(@items)
Given a list of scalars, turns them into a proper list in English ("one and two",
"one, two, three, and four"). This is used to help us make nicer error messages.
meta_class_alias($to[, $from])
meta_attribute_alias($to[, $from])
Create an alias from the class $from (or the current package, if $from is
unspecified), so that "Metaclass and Trait Name Resolution" in Moose works properly.
TODO
Here is a list of possible functions to write
discovering original method from modified method
search for origin class of a method or attribute
BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find
a bug please either email me, or add the bug to cpan-RT.
AUTHOR
Anders Nor Berle <debolaz AT gmail.com>
with contributions from:
Robert (phaylon) Sedlacek
Stevan Little
COPYRIGHT AND LICENSE
Copyright 2007-2009 by Infinity Interactive, Inc.
<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
perl v5.10.0 2009-11-18 Moose::Util(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-24 19:51 @38.107.179.238 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)