MooseX::Declare::Syntax::NamespaceHandling(3pm) User Contributed Perl Documentation MooseX::Declare::Syntax::NamespaceHandling(3pm)
NAME
MooseX::Declare::Syntax::NamespaceHandling - Handle namespaced blocks
DESCRIPTION
Allows the implementation of namespaced blocks like the role and class keyword handlers.
Namespaces are automatically nested. Meaning that, for example, a "class Bar" declaration inside another "class Foo" block gives the inner
one actually the name "Foo::Bar".
METHODS
parse
Any Object->parse (Object $context)
This is the main handling routine for namespaces. It will remove the namespace name and its options. If the handler was invoked without a
name, options or a following block, it is assumed that this is an instance of an autoquoted bareword like "class =" "Foo">.
The return value of the "parse" method is also the value that is returned to the user of the keyword.
CONSUMES
o MooseX::Declare::Syntax::KeywordHandling
o MooseX::Declare::Syntax::InnerSyntaxHandling
REQUIRED METHODS
handle_missing_block
Object->handle_missing_block (Object $context, Str $body, %args)
This must be implemented to decide what to do in case the statement is terminated rather than followed by a block. It will receive the
context object, the produced code that needs to be injected, and all the arguments that were passed to the call to "inject_code_parts" in
MooseX::Declare::Context.
The return value will be ignored.
EXTENDABLE STUB METHODS
add_namespace_customizations
add_optional_customizations
Object->add_namespace_customizations (Object $context, Str $package, HashRef $options)
Object->add_optional_customizations (Object $context, Str $package, HashRef $options)
These will be called (in this order) by the "parse" method. They allow specific hooks to attach before/after/around the customizations for
the namespace and the provided options that are not attached to the namespace directly.
While this distinction might seem superficial, we advise library developers faciliating this role to follow the precendent. This ensures
that when another component needs to tie between the namspace and any additional customizations everythign will run in the correct order.
An example of this separation would be
class Foo is mutable ...
being an option of the namespace generation, while
class Foo with Bar ...
is an additional optional customization.
handle_post_parsing
Object->handle_post_parsing (Object $context, Str $package, Str | Object $name)
Allows for additional modifications to te namespace after everything else has been done. It will receive the context, the fully qualified
package name, and either a string with the name that was specified (might not be fully qualified, since namespaces can be nested) or the
anonymous metaclass instance if no name was specified.
The return value of this method will be the value returned to the user of the keyword. If you always return the $package argument like
this:
sub handle_post_parsing {
my ($self, $context, $package, $name) = @_;
return $package;
}
and set this up in a "foo" keyword handler, you can use it like this:
foo Cthulhu {
my $fhtagn = foo Fhtagn { }
my $anon = foo { };
say $fhtagn; # Cthulhu::Fhtagn
say $anon; # some autogenerated package name
}
make_anon_metaclass
Class::MOP::Class Object->make_anon_metaclass ()
This method should be overridden if you want to provide anonymous namespaces.
It does not receive any arguments for customization of the metaclass, because the configuration and customization will be done by
MooseX::Declare in the package of the generated class in the same way as in those that have specified names. This way ensures that
anonymous and named namespaces are always handled equally.
If you do not extend this method (it will return nothing by default), an error will be thrown when a user attempts to declare an anonymous
namespace.
SEE ALSO
o MooseX::Declare
o MooseX::Declare::Syntax::MooseSetup
AUTHORS
o Florian Ragwitz <rafl@debian.org>
o Ash Berlin <ash@cpan.org>
o Chas. J. Owens IV <chas.owens@gmail.com>
o Chris Prather <chris@prather.org>
o Dave Rolsky <autarch@urth.org>
o Devin Austin <dhoss@cpan.org>
o Hans Dieter Pearcey <hdp@cpan.org>
o Justin Hunter <justin.d.hunter@gmail.com>
o Matt Kraai <kraai@ftbfs.org>
o Michele Beltrame <arthas@cpan.org>
o Nelo Onyiah <nelo.onyiah@gmail.com>
o nperez <nperez@cpan.org>
o Piers Cawley <pdcawley@bofh.org.uk>
o Rafael Kitover <rkitover@io.com>
o Robert 'phaylon' Sedlacek <rs@474.at>
o Stevan Little <stevan.little@iinteractive.com>
o Tomas Doran <bobtfish@bobtfish.net>
o Yanick Champoux <yanick@babyl.dyndns.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Florian Ragwitz.
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 v5.12.4 2011-08-23 MooseX::Declare::Syntax::NamespaceHandling(3pm)