NAME

Venus::Unpack - Unpack Class

ABSTRACT

Unpack Class for Perl 5

SYNOPSIS

package main;

use Venus::Unpack;

my $unpack = Venus::Unpack->new(args => ["hello", 123, 1.23]);

# my $args = $unpack->all->types('string', 'number', 'float')->args;

# ["hello", 123, 1.23]

DESCRIPTION

This package provides methods for validating, coercing, and otherwise operating on lists of arguments.

INHERITS

This package inherits behaviors from:

Venus::Kind::Utility

METHODS

This package provides the following methods:

all

all() (Unpack)

The all method selects all arguments for processing returns the invocant.

Since 2.01

all example 1

# given: synopsis

package main;

$unpack = $unpack->all;

# bless(..., 'Venus::Unpack')

arg

arg(Str $index) (Any)

The arg method returns the argument at the index specified.

Since 2.01

arg example 1

# given: synopsis

package main;

my $arg = $unpack->arg(0);

# "hello"

arg example 2

# given: synopsis

package main;

my $arg = $unpack->arg(1);

# 123

arg example 3

# given: synopsis

package main;

my $arg = $unpack->arg(2);

# 1.23

args

args(Any @args) (ArrayRef)

The args method returns all arugments as an arrayref, or list in list context. If arguments are provided they will overwrite the existing arugment list.

Since 2.01

args example 1

# given: synopsis

package main;

my $args = $unpack->args;

# ["hello", 123, 1.23]

args example 2

# given: synopsis

package main;

my $args = $unpack->args(1.23, 123, "hello");

# [1.23, 123, "hello"]

array

array() (Venus::Array)

The array method returns the argument list as a Venus::Array object.

Since 2.01

array example 1

# given: synopsis

package main;

my $array = $unpack->array;

# bless(..., 'Venus::Array')

cast

cast(Str $name) (ArrayRef)

The cast method processes the selected arguments, passing each value to the class name specified, or the "cast" in Venus::Type method, and returns results.

Since 2.01

cast example 1

# given: synopsis

package main;

my $cast = $unpack->all->cast;

# [
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::Number'),
#   bless(..., 'Venus::Float'),
# ]

cast example 2

# given: synopsis

package main;

my $cast = $unpack->all->cast('scalar');

# [
#   bless(..., 'Venus::Scalar'),
#   bless(..., 'Venus::Scalar'),
#   bless(..., 'Venus::Scalar'),
# ]

checks

checks(Str @types) (ArrayRef)

The checks method processes the selected arguments, passing each value to the "check" in Venus::Assert method with the type expression provided, and returns results.

Since 2.01

checks example 1

# given: synopsis

package main;

my $checks = $unpack->all->checks('string');

# [true, false, false]

checks example 2

# given: synopsis

package main;

my $checks = $unpack->all->checks('string | number');

# [true, true, false]

checks example 3

# given: synopsis

package main;

my $checks = $unpack->all->checks('string | number', 'float');

# [true, false, true]

checks example 4

# given: synopsis

package main;

my $checks = $unpack->all->checks('string', 'number', 'float');

# [true, true, true]

checks example 5

# given: synopsis

package main;

my $checks = $unpack->all->checks('boolean', 'value');

# [false, true, true]

copy

copy(Str @pairs) (Unpack)

The copy method copies values from the arugment list as properties of the underlying object and returns the invocant.

Since 2.01

copy example 1

# given: synopsis

package main;

$unpack = $unpack->copy(0 => 'arg1');

# bless({..., arg1 => 'hello'}, 'Venus::Unpack')

copy example 2

# given: synopsis

package main;

$unpack = $unpack->copy(0 => 'arg1', 2 => 'arg3');

# bless({..., arg1 => 'hello', arg3 => 1.23}, 'Venus::Unpack')

copy example 3

# given: synopsis

package main;

$unpack = $unpack->copy(0 => 'arg1', 1 => 'arg2', 2 => 'arg3');

# bless({..., arg1 => 'hello', arg2 => 123, arg3 => 1.23}, 'Venus::Unpack')

first

first() (Unpack)

The first method selects the first argument for processing returns the invocant.

Since 2.01

first example 1

# given: synopsis

package main;

$unpack = $unpack->first;

# bless(..., 'Venus::Unpack')

from

from(Str $data) (Unpack)

The from method names the source of the unpacking operation and is used in exception messages whenever the "signature" in Venus::Unpack operation fails. This method returns the invocant.

Since 2.23

from example 1

# given: synopsis

package main;

$unpack = $unpack->from;

# bless(..., 'Venus::Unpack')

from example 2

# given: synopsis

package main;

$unpack = $unpack->from('Example');

# bless(..., 'Venus::Unpack')

get

get(Str $index) (Any)

The get method returns the argument at the index specified.

Since 2.01

get example 1

# given: synopsis

package main;

my $get = $unpack->get;

# undef

get example 2

# given: synopsis

package main;

my $get = $unpack->get(0);

# "hello"

get example 3

# given: synopsis

package main;

my $get = $unpack->get(1);

# 123

get example 4

# given: synopsis

package main;

my $get = $unpack->get(2);

# 1.23

get example 5

# given: synopsis

package main;

my $get = $unpack->get(3);

# undef

into

into(Str @args) (Any)

The into method processes the selected arguments, passing each value to the class name specified, and returns results.

Since 2.01

into example 1

# given: synopsis

package main;

my $cast = $unpack->all->into('Venus::String');

# [
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::String'),
# ]

into example 2

# given: synopsis

package main;

my $cast = $unpack->all->into('Venus::String', 'Venus::Number');

# [
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::Number'),
#   bless(..., 'Venus::Number'),
# ]

into example 3

# given: synopsis

package main;

my $cast = $unpack->all->into('Venus::String', 'Venus::Number', 'Venus::Float');

# [
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::Number'),
#   bless(..., 'Venus::Float'),
# ]

last

last() (Unpack)

The last method selects the last argument for processing returns the invocant.

Since 2.01

last example 1

# given: synopsis

package main;

$unpack = $unpack->last;

# bless(..., 'Venus::Unpack')

list

list(Str | CodeRef $code, Any @args) (ArrayRef)

The list method returns the result of the dispatched method call as an arrayref, or list in list context.

Since 2.01

list example 1

# given: synopsis

package main;

my (@args) = $unpack->all->list('cast');

# (
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::Number'),
#   bless(..., 'Venus::Float'),
# )

list example 2

# given: synopsis

package main;

my ($string) = $unpack->all->list('cast');

# (
#   bless(..., 'Venus::String'),
# )

list example 3

# given: synopsis

package main;

my (@args) = $unpack->all->list('cast', 'string');

# (
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::String'),
# )

list example 4

# given: synopsis

package main;

my (@args) = $unpack->use(0,2)->list('cast', 'string', 'float');

# (
#   bless(..., 'Venus::String'),
#   bless(..., 'Venus::Float'),
# )

move

move(Str @pairs) (Unpack)

The move method moves values from the arugment list, reducing the arugment list, as properties of the underlying object and returns the invocant.

Since 2.01

move example 1

# given: synopsis

package main;

$unpack = $unpack->move(0 => 'arg1');

# bless({..., arg1 => 'hello'}, 'Venus::Unpack')

move example 2

# given: synopsis

package main;

$unpack = $unpack->move(0 => 'arg1', 2 => 'arg3');

# bless({..., arg1 => 'hello', arg3 => 1.23}, 'Venus::Unpack')

move example 3

# given: synopsis

package main;

$unpack = $unpack->move(0 => 'arg1', 1 => 'arg2', 2 => 'arg3');

# bless({..., arg1 => 'hello', arg2 => 123, arg3 => 1.23}, 'Venus::Unpack')

name

name(Str $data) (Unpack)

The name method names the unpacking operation and is used in exception messages whenever the "signature" in Venus::Unpack operation fails. This method returns the invocant.

Since 2.23

name example 1

# given: synopsis

package main;

$unpack = $unpack->name;

# bless(..., 'Venus::Unpack')

name example 2

# given: synopsis

package main;

$unpack = $unpack->name('example');

# bless(..., 'Venus::Unpack')

one

one(Str | CodeRef $code, Any @args) (Any)

The one method returns the first result of the dispatched method call.

Since 2.01

one example 1

# given: synopsis

package main;

my $one = $unpack->all->one('cast');

# (
#   bless(..., 'Venus::String'),
# )

one example 2

# given: synopsis

package main;

my $one = $unpack->all->one('cast', 'string');

# (
#   bless(..., 'Venus::String'),
# )

reset

reset(Any @args) (Unpack)

The reset method resets the arugments list (if provided) and deselects all arguments (selected for processing) and returns the invocant.

Since 2.01

reset example 1

# given: synopsis

package main;

$unpack = $unpack->all->reset;

# bless(..., 'Venus::Unpack')

reset example 2

# given: synopsis

package main;

$unpack = $unpack->all->reset(1.23, 123, "hello");

# bless(..., 'Venus::Unpack')

set

set(Str $index, Any $value) (Any)

The set method assigns the value provided at the index specified and returns the value.

Since 2.01

set example 1

# given: synopsis

package main;

my $set = $unpack->set;

# undef

set example 2

# given: synopsis

package main;

my $set = $unpack->set(0, 'howdy');

# "howdy"

set example 3

# given: synopsis

package main;

my $set = $unpack->set(1, 987);

# 987

set example 4

# given: synopsis

package main;

my $set = $unpack->set(2, 12.3);

# 12.3

set example 5

# given: synopsis

package main;

my $set = $unpack->set(3, 'goodbye');

# "goodbye"

signature

signature(Str $name, Str @types) (ArrayRef)

The signature method processes the selected arguments, passing each value to the "validate" in Venus::Assert method with the type expression provided and throws an exception on failure and otherise returns the results as an arrayref, or as a list in list context.

Since 2.01

signature example 1

# given: synopsis

package main;

my ($string, $number, $float) = $unpack->all->name('example-1')->signature(
  'string | number | float',
);

# ("hello", 123, 1.23)

signature example 2

 # given: synopsis

 package main;

 my ($string, $number, $float) = $unpack->all->name('example-2')->signature(
   'string', 'number', 'float',
);

 # ("hello", 123, 1.23)

signature example 3

# given: synopsis

package main;

my $results = $unpack->all->name('example-3')->signature(
  'string', 'number',
);

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

signature example 4

# given: synopsis

package main;

my $results = $unpack->all->name('example-4')->signature(
  'string',
);

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

signature example 5

# given: synopsis

package main;

my $results = $unpack->all->name('example-5')->from('t/Venus_Unpack.t')->signature(
  'object',
);

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

types

types(Str @types) (Unpack)

The types method processes the selected arguments, passing each value to the "validate" in Venus::Assert method with the type expression provided, and unlike the "validate" method returns the invocant.

Since 2.01

types example 1

# given: synopsis

package main;

$unpack = $unpack->all->types('string | number | float');

# bless({...}, 'Venus::Unpack')

types example 2

# given: synopsis

package main;

$unpack = $unpack->all->types('string', 'number', 'float');

# bless({...}, 'Venus::Unpack')

types example 3

# given: synopsis

package main;

$unpack = $unpack->all->types('string', 'number');

# Exception! (isa Venus::Error)

# argument #3 error

types example 4

# given: synopsis

package main;

$unpack = $unpack->all->types('string');

# Exception! (isa Venus::Error)

# argument #2 error

use

use(Int @args) (Unpack)

The use method selects the arguments specified (by index) for processing returns the invocant.

Since 2.01

use example 1

# given: synopsis

package main;

$unpack = $unpack->use(1,2);

# bless(..., 'Venus::Unpack')

use example 2

# given: synopsis

package main;

$unpack = $unpack->use(1,0);

# bless(..., 'Venus::Unpack')

use example 3

# given: synopsis

package main;

$unpack = $unpack->use(2,1,0);

# bless(..., 'Venus::Unpack')

validate

validate(Str @types) (Unpack)

The validate method processes the selected arguments, passing each value to the "validate" in Venus::Assert method with the type expression provided and throws an exception on failure and otherise returns the resuts.

Since 2.01

validate example 1

# given: synopsis

package main;

my $results = $unpack->all->validate('string | number | float');

# ["hello", 123, 1.23]

validate example 2

# given: synopsis

package main;

my $results = $unpack->all->validate('string', 'number', 'float');

# ["hello", 123, 1.23]

validate example 3

# given: synopsis

package main;

my $results = $unpack->all->validate('string', 'number');

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

validate example 4

# given: synopsis

package main;

my $results = $unpack->all->validate('string');

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

AUTHORS

Awncorp, awncorp@cpan.org

LICENSE

This program is free software, you can redistribute it and/or modify it under the terms of the Apache license version 2.0.

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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NAME

ABSTRACT

SYNOPSIS

DESCRIPTION

INHERITS

METHODS

all

arg

args

array

cast

checks

copy

first

from

get

into

last

list

move

name

one

reset

set

signature

types

use

validate

AUTHORS

LICENSE

Module Install Instructions