# Moose::Util - phpMan

## NAME
    [Moose::Util] - Utilities for working with Moose classes

## VERSION
    version 2.2200

## 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.

  is_role($package_or_obj)
    Returns true if the provided package name or object is a [Moose::Role].

  does_role($class_or_obj, $role_or_obj)
    Returns true if $class_or_obj does the given $role_or_obj. The role can
    be provided as a name or a [Moose::Meta::Role] object.

    The class must already have a metaclass for this to work. If it doesn't,
    this function simply returns false.

  search_class_by_role($class_or_obj, $role_or_obj)
    Returns the first class in the class's precedence list that does
    $role_or_obj, if any. The role can be either a name or a
    [Moose::Meta::Role] object.

    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 a list of names or [Moose::Meta::Role] objects,
    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.

  with_traits($class_name, @role_names)
    This function creates a new class from $class_name with each of
    @role_names applied. It returns the name of the new class.

  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.

  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.

  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.

  throw_exception( $class_name, %arguments_to_exception)
    Calls die with an object of [Moose::Exception]::$class_name, with
    %arguments_to_exception passed as arguments.

## 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
    See "BUGS" in Moose for details on reporting bugs.

## AUTHORS
    *   Stevan Little <<stevan@cpan.org>>

    *   Dave Rolsky <<autarch@urth.org>>

    *   Jesse Luehrs <<doy@cpan.org>>

    *   Shawn M Moore <<sartak@cpan.org>>

    *   יובל קוג'מן (Yuval Kogman) <<nothingmuch@woobling.org>>

    *   Karen Etheridge <<ether@cpan.org>>

    *   Florian Ragwitz <<rafl@debian.org>>

    *   Hans Dieter Pearcey <<hdp@cpan.org>>

    *   Chris Prather <<chris@prather.org>>

    *   Matt S Trout <<mstrout@cpan.org>>

## COPYRIGHT AND LICENSE
    This software is copyright (c) 2006 by Infinity Interactive, Inc.

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