| Name : perl-Class-Spiffy
| |
| Version : 0.15
| Vendor : obs://build_opensuse_org/devel:languages:perl
|
| Release : lp155.2.1
| Date : 2023-07-20 18:56:23
|
| Group : Development/Libraries/Perl
| Source RPM : perl-Class-Spiffy-0.15-lp155.2.1.src.rpm
|
| Size : 0.05 MB
| |
| Packager : https://www_suse_com/
| |
| Summary : Spiffy Framework with No Source Filtering
|
Description :
\"Class::Spiffy\" is a framework and methodology for doing object oriented
(OO) programming in Perl. Class::Spiffy combines the best parts of
Exporter.pm, base.pm, mixin.pm and SUPER.pm into one magic foundation
class. It attempts to fix all the nits and warts of traditional Perl OO, in
a clean, straightforward and (perhaps someday) standard way.
Class::Spiffy borrows ideas from other OO languages like Python, Ruby, Java
and Perl 6. It also adds a few tricks of its own.
If you take a look on CPAN, there are a ton of OO related modules. When
starting a new project, you need to pick the set of modules that makes most
sense, and then you need to use those modules in each of your classes.
Class::Spiffy, on the other hand, has everything you\'ll probably need in
one module, and you only need to use it once in one of your classes. If you
make Class::Spiffy the base class of the basest class in your project,
Class::Spiffy will automatically pass all of its magic to all of your
subclasses. You may eventually forget that you\'re even using it!
The most striking difference between Class::Spiffy and other Perl object
oriented base classes, is that it has the ability to export things. If you
create a subclass of Class::Spiffy, all the things that Class::Spiffy
exports will automatically be exported by your subclass, in addition to any
more things that you want to export. And if someone creates a subclass of
your subclass, all of those things will be exported automatically, and so
on. Think of it as \"Inherited Exportation\", and it uses the familiar
Exporter.pm specification syntax.
To use Class::Spiffy or any subclass of Class::Spiffy as a base class of
your class, you specify the \'-base\' argument to the \'use\' command.
use MySpiffyBaseModule -base;
You can also use the traditional \'use base \'MySpiffyBaseModule\';\' syntax
and everything will work exactly the same. The only caveat is that
Class::Spiffy must already be loaded. That\'s because Class::Spiffy rewires
base.pm on the fly to do all the Spiffy magics.
Class::Spiffy has support for Ruby-like mixins with Perl6-like roles. Just
like \'base\' you can use either of the following invocations:
use mixin \'MySpiffyBaseModule\';
use MySpiffyBaseModule -mixin;
The second version will only work if the class being mixed in is a subclass
of Class::Spiffy. The first version will work in all cases, as long as
Class::Spiffy has already been loaded.
To limit the methods that get mixed in, use roles. (Hint: they work just
like an Exporter list):
use MySpiffyBaseModule -mixin => qw(:basics x y !foo);
A useful feature of Class::Spiffy is that it exports two functions: \'field\'
and \'const\' that can be used to declare the attributes of your class, and
automatically generate accessor methods for them. The only difference
between the two functions is that \'const\' attributes can not be modified;
thus the accessor is much faster.
One interesting aspect of OO programming is when a method calls the same
method from a parent class. This is generally known as calling a super
method. Perl\'s facility for doing this is butt ugly:
sub cleanup {
my $self = shift;
$self->scrub;
$self->SUPER::cleanup(AATT_);
}
Class::Spiffy makes it, er, super easy to call super methods. You just use
the \'super\' function. You don\'t need to pass it any arguments because it
automatically passes them on for you. Here\'s the same function with
Class::Spiffy:
sub cleanup {
my $self = shift;
$self->scrub;
super;
}
Class::Spiffy has a special method for parsing arguments called
\'parse_arguments\', that it also uses for parsing its own arguments. You
declare which arguments are boolean (singletons) and which ones are paired,
with two special methods called \'boolean_arguments\' and \'paired_arguments\'.
Parse arguments pulls out the booleans and pairs and returns them in an
anonymous hash, followed by a list of the unmatched arguments.
Finally, Class::Spiffy can export a few debugging functions \'WWW\', \'XXX\',
\'YYY\' and \'ZZZ\'. Each of them produces a YAML dump of its arguments. WWW
warns the output, XXX dies with the output, YYY prints the output, and ZZZ
confesses the output. If YAML doesn\'t suit your needs, you can switch all
the dumps to Data::Dumper format with the \'- dumper\' option.
That\'s Spiffy! Pretty Classy, eh?
|
RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/devel:/languages:/perl:/CPAN-C/15.5/noarch |
