NAME

Venus::Space - Space Class

ABSTRACT

Space Class for Perl 5

SYNOPSIS

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/bar');

# $space->package; # Foo::Bar

DESCRIPTION

This package provides methods for parsing and manipulating package namespaces.

INHERITS

This package inherits behaviors from:

Venus::Name

METHODS

This package provides the following methods:

all

all(Str $method, Any @args) (ArrayRef[Tuple[Str, Any]])

The all method executes any available method on the instance and all instances representing packages inherited by the package represented by the invocant. This method supports dispatching, i.e. providing a method name and arguments whose return value will be acted on by this method.

Since 0.01

all example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('Venus');

my $all = $space->all('id');

# [["Venus", "Venus"]]

all example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('Venus/Space');

my $all = $space->all('inherits');

# [
#   [
#     "Venus::Space", ["Venus::Name"]
#   ],
#   [
#     "Venus::Name", ["Venus::Kind::Utility"]
#   ],
# ]

all example 3

package main;

use Venus::Space;

my $space = Venus::Space->new('Venus/Space');

my $all = $space->all('locate');

# [
#   [
#     "Venus::Space",
#     "/path/to/lib/Venus/Space.pm",
#   ],
#   [
#     "Venus::Name",
#     "/path/to/lib/Venus/Name.pm",
#   ],
# ]

append

append(Str @path) (Space)

The append method modifies the object by appending to the package namespace parts.

Since 0.01

append example 1

# given: synopsis;

my $append = $space->append('baz');

# bless({ value => "Foo/Bar/Baz" }, "Venus::Space")

append example 2

# given: synopsis;

my $append = $space->append('baz', 'bax');

# bless({ value => "Foo/Bar/Baz/Bax" }, "Venus::Space")

array

array(Str $name) (ArrayRef)

The array method returns the value for the given package array variable name.

Since 0.01

array example 1

# given: synopsis;

package Foo::Bar;

our @handler = 'start';

package main;

my $array = $space->array('handler');

# ["start"]

arrays

arrays() (ArrayRef)

The arrays method searches the package namespace for arrays and returns their names.

Since 0.01

arrays example 1

# given: synopsis;

package Foo::Bar;

our @handler = 'start';
our @initial = ('next', 'prev');

package main;

my $arrays = $space->arrays;

# ["handler", "initial"]

attributes

attributes() (ArrayRef)

The attributes method searches the package namespace for attributes and returns their names. This will not include attributes from roles, mixins, or superclasses.

Since 1.02

attributes example 1

package Foo::Attrs;

use Venus::Class 'attr';

attr 'start';
attr 'abort';

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/attrs');

my $attributes = $space->attributes;

# ["start", "abort"]

attributes example 2

package Foo::Base;

use Venus::Class 'attr', 'base';

attr 'start';
attr 'abort';

package Foo::Attrs;

use Venus::Class 'attr';

attr 'show';
attr 'hide';

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/attrs');

my $attributes = $space->attributes;

# ["show", "hide"]

authority

authority() (Maybe[Str])

The authority method returns the AUTHORITY declared on the target package, if any.

Since 0.01

authority example 1

package Foo::Boo;

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/boo');

my $authority = $space->authority;

# undef

authority example 2

package Foo::Boo;

our $AUTHORITY = 'cpan:CPANERY';

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/boo');

my $authority = $space->authority;

# "cpan:CPANERY"

basename

basename() (Str)

The basename method returns the last segment of the package namespace parts.

Since 0.01

basename example 1

# given: synopsis;

my $basename = $space->basename;

# "Bar"

blessed

blessed(Ref $data) (Self)

The blessed method blesses the given value into the package namespace and returns an object. If no value is given, an empty hashref is used.

Since 0.01

blessed example 1

# given: synopsis;

package Foo::Bar;

sub import;

package main;

my $blessed = $space->blessed;

# bless({}, "Foo::Bar")

blessed example 2

# given: synopsis;

package Foo::Bar;

sub import;

package main;

my $blessed = $space->blessed({okay => 1});

# bless({ okay => 1 }, "Foo::Bar")

build

build(Any @args) (Self)

The build method attempts to call new on the package namespace and if successful returns the resulting object.

Since 0.01

build example 1

# given: synopsis;

package Foo::Bar::Baz;

sub new {
  bless {}, $_[0];
}

package main;

my $build = $space->child('baz')->build;

# bless({}, "Foo::Bar::Baz")

build example 2

# given: synopsis;

package Foo::Bar::Bax;

sub new {
  bless $_[1], $_[0];
}

package main;

my $build = $space->child('bax')->build({okay => 1});

# bless({ okay => 1 }, "Foo::Bar::Bax")

build example 3

# given: synopsis;

package Foo::Bar::Bay;

sub new {
  bless $_[1], $_[0];
}

package main;

my $build = $space->child('bay')->build([okay => 1]);

# bless(["okay", 1], "Foo::Bar::Bay")

call

call(Any @args) (Any)

The call method attempts to call the given subroutine on the package namespace and if successful returns the resulting value.

Since 0.01

call example 1

package Foo;

sub import;

sub start {
  'started'
}

package main;

use Venus::Space;

my $space = Venus::Space->new('foo');

my $result = $space->call('start');

# "started"

call example 2

package Zoo;

sub import;

sub AUTOLOAD {
  bless {};
}

sub DESTROY {
  ; # noop
}

package main;

use Venus::Space;

my $space = Venus::Space->new('zoo');

my $result = $space->call('start');

# bless({}, "Zoo")

call example 3

package main;

use Venus::Space;

my $space = Venus::Space->new('foo');

my $result = $space->call('missing');

# Exception! Venus::Space::Error (isa Venus::Error)

chain

chain(Str | Tuple[Str, Any] @steps) (Any)

The chain method chains one or more method calls and returns the result.

Since 0.01

chain example 1

package Chu::Chu0;

sub import;

package main;

use Venus::Space;

my $space = Venus::Space->new('Chu::Chu0');

my $result = $space->chain('blessed');

# bless({}, "Chu::Chu0")

chain example 2

package Chu::Chu1;

sub new {
  bless pop;
}

sub frame {
  [@_]
}

package main;

use Venus::Space;

my $space = Venus::Space->new('Chu::Chu1');

my $result = $space->chain(['blessed', {1..4}], 'frame');

# [bless({ 1 => 2, 3 => 4 }, "Chu::Chu1")]

chain example 3

package Chu::Chu2;

sub new {
  bless pop;
}

sub frame {
  [@_]
}

package main;

use Venus::Space;

my $space = Venus::Space->new('Chu::Chu2');

my $chain = $space->chain('blessed', ['frame', {1..4}]);

# [bless({}, "Chu::Chu2"), { 1 => 2, 3 => 4 }]

child

child(Str @path) (Space)

The child method returns a new Venus::Space object for the child package namespace.

Since 0.01

child example 1

# given: synopsis;

my $child = $space->child('baz');

# bless({ value => "Foo/Bar/Baz" }, "Venus::Space")

children

children() (ArrayRef[Object])

The children method searches %INC and @INC and retuns a list of Venus::Space objects for each child namespace found (one level deep).

Since 0.01

children example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('c_p_a_n');

my $children = $space->children;

# [
#   bless({ value => "CPAN/Author" }, "Venus::Space"),
#   bless({ value => "CPAN/Bundle" }, "Venus::Space"),
#   bless({ value => "CPAN/CacheMgr" }, "Venus::Space"),
#   ...
# ]

cop

cop(Str $method, Any @args) (CodeRef)

The cop method attempts to curry the given subroutine on the package namespace and if successful returns a closure. This method supports dispatching, i.e. providing a method name and arguments whose return value will be acted on by this method.

Since 0.01

cop example 1

package Foo::Bar;

sub import;

sub handler {
  [@_]
}

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/bar');

my $code = $space->cop('handler', $space->blessed);

# sub { Foo::Bar::handler(..., @_) }

cop example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/bar');

my $code = $space->cop('missing', $space->blessed);

# Exception! Venus::Space::Error (isa Venus::Error)

data

data() (Str)

The data method attempts to read and return any content stored in the DATA section of the package namespace.

Since 0.01

data example 1

# given: synopsis;

my $data = $space->data;

# ""

eval

eval(Str @data) (Any)

The eval method takes a list of strings and evaluates them under the namespace represented by the instance.

Since 0.01

eval example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('foo');

my $eval = $space->eval('our $VERSION = 0.01');

# 0.01

eval example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('foo');

my $eval = $space->eval('die');

# Exception! Venus::Space::Error (isa Venus::Error)

explain

explain() (Str)

The explain method returns the package name and is used in stringification operations.

Since 0.01

explain example 1

# given: synopsis;

my $explain = $space->explain;

# "Foo::Bar"

hash

hash(Str $name) (HashRef)

The hash method returns the value for the given package hash variable name.

Since 0.01

hash example 1

# given: synopsis;

package Foo::Bar;

our %settings = (
  active => 1
);

package main;

my $hash = $space->hash('settings');

# { active => 1 }

hashes

hashes() (ArrayRef)

The hashes method searches the package namespace for hashes and returns their names.

Since 0.01

hashes example 1

# given: synopsis;

package Foo::Bar;

our %defaults = (
  active => 0
);

our %settings = (
  active => 1
);

package main;

my $hashes = $space->hashes;

# ["defaults", "settings"]

id

id() (Str)

The id method returns the fully-qualified package name as a label.

Since 0.01

id example 1

# given: synopsis;

my $id = $space->id;

# "Foo_Bar"

included

included() (Str | Undef)

The included method returns the path of the namespace if it exists in %INC.

Since 0.01

included example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('Venus/Space');

my $included = $space->included;

# "/path/to/lib/Venus/Space.pm"

inherits

inherits() (ArrayRef)

The inherits method returns the list of superclasses the target package is derived from.

Since 0.01

inherits example 1

package Bar;

package main;

use Venus::Space;

my $space = Venus::Space->new('bar');

my $inherits = $space->inherits;

# []

inherits example 2

package Foo;

sub import;

package Bar;

use base 'Foo';

package main;

use Venus::Space;

my $space = Venus::Space->new('bar');

my $inherits = $space->inherits;

# ["Foo"]

init

init() (Str)

The init method ensures that the package namespace is loaded and, whether created in-memory or on-disk, is flagged as being loaded and loadable.

Since 0.01

init example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('kit');

my $init = $space->init;

# "Kit"

inject

inject(Str $name, Maybe[CodeRef] $coderef) (Any)

The inject method monkey-patches the package namespace, installing a named subroutine into the package which can then be called normally, returning the fully-qualified subroutine name.

Since 0.01

inject example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('kit');

my $inject = $space->inject('build', sub { 'finished' });

# *Kit::build

load

load() (Str)

The load method checks whether the package namespace is already loaded and if not attempts to load the package. If the package is not loaded and is not loadable, this method will throw an exception using confess. If the package is loadable, this method returns truthy with the package name. As a workaround for packages that only exist in-memory, if the package contains a new, with, meta, or import routine it will be recognized as having been loaded.

Since 0.01

load example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('c_p_a_n');

my $load = $space->load;

# "CPAN"

load example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('no/thing');

my $load = $space->load;

# Exception! Venus::Space::Error (isa Venus::Error)

loaded

loaded() (Bool)

The loaded method checks whether the package namespace is already loaded and returns truthy or falsy.

Since 0.01

loaded example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('Kit');

$space->init;

$space->unload;

my $loaded = $space->loaded;

# 0

loaded example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('Kit');

$space->init;

my $loaded = $space->loaded;

# 1

locate

locate() (Str)

The locate method checks whether the package namespace is available in @INC, i.e. on disk. This method returns the file if found or an empty string.

Since 0.01

locate example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('xyz');

my $locate = $space->locate;

# ""

locate example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('data/dumper');

$space->load;

my $locate = $space->locate;

# "/path/to/lib/Data/Dumper.pm"

name

name() (Str)

The name method returns the fully-qualified package name.

Since 0.01

name example 1

# given: synopsis;

my $name = $space->name;

# "Foo::Bar"

parent

parent() (Space)

The parent method returns a new Venus::Space object for the parent package namespace.

Since 0.01

parent example 1

# given: synopsis;

my $parent = $space->parent;

# bless({ value => "Foo" }, "Venus::Space")

parse

parse() (ArrayRef)

The parse method parses the string argument and returns an arrayref of package namespace segments (parts).

Since 0.01

parse example 1

# given: synopsis;

my $parse = $space->parse;

# ["Foo", "Bar"]

parse example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo/Bar');

my $parse = $space->parse;

# ["Foo", "Bar"]

parse example 3

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo\Bar');

my $parse = $space->parse;

# ["Foo", "Bar"]

parse example 4

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo-Bar');

my $parse = $space->parse;

# ["FooBar"]

parse example 5

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo_Bar');

my $parse = $space->parse;

# ["FooBar"]

parts

parts() (ArrayRef)

The parts method returns an arrayref of package namespace segments (parts).

Since 0.01

parts example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo');

my $parts = $space->parts;

# ["Foo"]

parts example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo/Bar');

my $parts = $space->parts;

# ["Foo", "Bar"]

parts example 3

package main;

use Venus::Space;

my $space = Venus::Space->new('Foo_Bar');

my $parts = $space->parts;

# ["FooBar"]

prepend

prepend(Str @path) (Space)

The prepend method modifies the object by prepending to the package namespace parts.

Since 0.01

prepend example 1

# given: synopsis;

my $prepend = $space->prepend('etc');

# bless({ value => "Etc/Foo/Bar" }, "Venus::Space")

prepend example 2

# given: synopsis;

my $prepend = $space->prepend('etc', 'tmp');

# bless({ value => "Etc/Tmp/Foo/Bar" }, "Venus::Space")

purge

purge() (Self)

The purge method purges a package space by expunging its symbol table and removing it from %INC.

Since 1.02

purge example 1

package main;

use Venus::Space;

# Bar::Gen is generated with $VERSION as 0.01

my $space = Venus::Space->new('Bar/Gen');

$space->load;

my $purge = $space->purge;

# bless({ value => "Bar::Gen" }, "Venus::Space")

# Bar::Gen->VERSION was 0.01, now undef

# Symbol table is gone, $space->visible is 0

rebase

rebase(Str @path) (Space)

The rebase method returns an object by prepending the package namespace specified to the base of the current object's namespace.

Since 0.01

rebase example 1

# given: synopsis;

my $rebase = $space->rebase('zoo');

# bless({ value => "Zoo/Bar" }, "Venus::Space")

reload

reload() (Str)

The reload method attempts to delete and reload the package namespace using the "load" method. Note: Reloading is additive and will overwrite existing symbols but does not remove symbols.

Since 0.01

reload example 1

package main;

use Venus::Space;

# Foo::Gen is generated with $VERSION as 0.01

my $space = Venus::Space->new('Foo/Gen');

my $reload = $space->reload;

# Foo::Gen
# Foo::Gen->VERSION is 0.01

reload example 2

package main;

use Venus::Space;

# Foo::Gen is generated with $VERSION as 0.02

my $space = Venus::Space->new('Foo/Gen');

my $reload = $space->reload;

# Foo::Gen
# Foo::Gen->VERSION is 0.02

require

require(Str $target) (Any)

The require method executes a require statement within the package namespace specified.

Since 0.01

require example 1

# given: synopsis;

my $require = $space->require('Venus');

# 1

root

root() (Str)

The root method returns the root package namespace segments (parts). Sometimes separating the root from the parts helps identify how subsequent child objects were derived.

Since 0.01

root example 1

# given: synopsis;

my $root = $space->root;

# "Foo"

routine

routine(Str $name) (CodeRef)

The routine method returns the subroutine reference for the given subroutine name.

Since 0.01

routine example 1

package Foo;

sub cont {
  [@_]
}

sub abort {
  [@_]
}

package main;

use Venus::Space;

my $space = Venus::Space->new('foo');

my $routine = $space->routine('cont');

# sub { ... }

routines

routines() (ArrayRef)

The routines method searches the package namespace for routines and returns their names.

Since 0.01

routines example 1

package Foo::Subs;

sub start {
  1
}

sub abort {
  1
}

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/subs');

my $routines = $space->routines;

# ["abort", "start"]

scalar

scalar(Str $name) (Any)

The scalar method returns the value for the given package scalar variable name.

Since 0.01

scalar example 1

# given: synopsis;

package Foo::Bar;

our $root = '/path/to/file';

package main;

my $scalar = $space->scalar('root');

# "/path/to/file"

scalars

scalars() (ArrayRef)

The scalars method searches the package namespace for scalars and returns their names.

Since 0.01

scalars example 1

# given: synopsis;

package Foo::Bar;

our $root = 'root';
our $base = 'path/to';
our $file = 'file';

package main;

my $scalars = $space->scalars;

# ["base", "file", "root"]

sibling

sibling(Str $path) (Space)

The sibling method returns a new Venus::Space object for the sibling package namespace.

Since 0.01

sibling example 1

# given: synopsis;

my $sibling = $space->sibling('baz');

# bless({ value => "Foo/Baz" }, "Venus::Space")

siblings

siblings() (ArrayRef[Object])

The siblings method searches %INC and @INC and retuns a list of Venus::Space objects for each sibling namespace found (one level deep).

Since 0.01

siblings example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('encode/m_i_m_e');

my $siblings = $space->siblings;

# [
#   bless({ value => "Encode/MIME/Header" }, "Venus::Space"),
#   bless({ value => "Encode/MIME/Name" }, "Venus::Space"),
#   ...
# ]

splice

splice(Int $offset, Int $length, Any @list) (Space)

The splice method perform a Perl "splice" in perlfunc operation on the package namespace.

Since 0.09

splice example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/baz');

my $splice = $space->splice(1, 0, 'bar');

# bless({ value => "Foo/Bar/Baz" }, "Venus::Space")

splice example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/baz');

my $splice = $space->splice(1, 1);

# bless({ value => "Foo" }, "Venus::Space")

splice example 3

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/baz');

my $splice = $space->splice(-2, 1);

# bless({ value => "Baz" }, "Venus::Space")

splice example 4

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/baz');

my $splice = $space->splice(1);

# bless({ value => "Foo" }, "Venus::Space")

tryload

tryload() (Bool)

The tryload method attempt to load the represented package using the "load" method and returns truthy/falsy based on whether the package was loaded.

Since 0.01

tryload example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('c_p_a_n');

my $tryload = $space->tryload;

# 1

tryload example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('n_a_p_c');

my $tryload = $space->tryload;

# 0

unload

unload() (Self)

The unload method unloads a package space by nullifying its symbol table and removing it from %INC.

Since 1.02

unload example 1

package main;

use Venus::Space;

# Bar::Gen is generated with $VERSION as 0.01

my $space = Venus::Space->new('Bar/Gen');

$space->load;

my $unload = $space->unload;

# bless({ value => "Bar::Gen" }, "Venus::Space")

# Bar::Gen->VERSION was 0.01, now undef

# Symbol table remains, $space->visible is 1

use

use(Str | Tuple[Str, Str] $target, Any @params) (Space)

The use method executes a use statement within the package namespace specified.

Since 0.01

use example 1

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/goo');

my $use = $space->use('Venus');

# bless({ value => "foo/goo" }, "Venus::Space")

use example 2

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/hoo');

my $use = $space->use('Venus', 'error');

# bless({ value => "foo/hoo" }, "Venus::Space")

use example 3

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/foo');

my $use = $space->use(['Venus', 9.99], 'error');

variables

variables() (ArrayRef[Tuple[Str, ArrayRef]])

The variables method searches the package namespace for variables and returns their names.

Since 0.01

variables example 1

package Etc;

our $init = 0;
our $func = 1;

our @does = (1..4);
our %sets = (1..4);

package main;

use Venus::Space;

my $space = Venus::Space->new('etc');

my $variables = $space->variables;

# [
#   ["arrays", ["does"]],
#   ["hashes", ["sets"]],
#   ["scalars", ["func", "init"]],
# ]

version

version() (Maybe[Str])

The version method returns the VERSION declared on the target package, if any.

Since 0.01

version example 1

package Foo::Boo;

sub import;

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/boo');

my $version = $space->version;

# undef

version example 2

package Foo::Boo;

our $VERSION = 0.01;

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/boo');

my $version = $space->version;

# 0.01

visible

visible() (Bool)

The visible method returns truthy is the package namespace is visible, i.e. has symbols defined.

Since 1.02

visible example 1

# given: synopsis

package main;

my $visible = $space->visible;

# 1

visible example 2

package Foo::Fe;

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/fe');

my $visible = $space->visible;

# 0

visible example 3

package Foo::Fe;

our $VERSION = 0.01;

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/fe');

my $visible = $space->visible;

# 1

visible example 4

package Foo::Fi;

sub import;

package main;

use Venus::Space;

my $space = Venus::Space->new('foo/fi');

my $visible = $space->visible;

# 1

To install Venus, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Venus

CPAN shell

perl -MCPAN -e shell
install Venus

For more information on module installation, please visit the detailed CPAN module installation guide.

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module: (e.g. module:Plugin)
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NAME

ABSTRACT

SYNOPSIS

DESCRIPTION

INHERITS

METHODS

all

append

array

arrays

attributes

authority

basename

blessed

build

call

chain

child

children

cop

data

eval

explain

hash

hashes

id

included

inherits

init

inject

load

loaded

locate

meta

name

parent

parse

parts

prepend

purge

rebase

reload

require

root

routine

routines

scalar

scalars

sibling

siblings

splice

tryload

unload

use

variables

version

visible

Module Install Instructions