Matthew Simon Cavalletto > Class-MakeMethods-1.01 > Class::MakeMethods::Evaled::Hash

Download:
Class-MakeMethods-1.01.tar.gz

Dependencies

Annotate this POD

CPAN RT

New  1
Open  2
View/Report Bugs
Module Version: 1   Source  

NAME ^

Class::MakeMethods::Evaled::Hash - Typical hash methods

SYNOPSIS ^

  package MyObject;
  use Class::MakeMethods::Evaled::Hash (
    new => 'new',
    scalar => [ 'foo', 'bar' ],
    array => 'my_list',
    hash => 'my_index',
  );
  ...
  
  # Constructor
  my $obj = MyObject->new( foo => 'Foozle' );
  
  # Scalar Accessor
  print $obj->foo();
  
  $obj->bar('Barbados'); 
  print $obj->bar();
  
  # Array accessor
  $obj->my_list(0 => 'Foozle', 1 => 'Bang!');
  print $obj->my_list(1);
  
  # Hash accessor
  $obj->my_index('broccoli' => 'Blah!', 'foo' => 'Fiddle');
  print $obj->my_index('foo');

DESCRIPTION ^

The Evaled::Hash subclass of MakeMethods provides a simple constructor and accessors for blessed-hash object instances.

Calling Conventions

When you use this package, the method names you provide as arguments cause subroutines to be generated and installed in your module.

See "Calling Conventions" in Class::MakeMethods::Standard for a summary, or "USAGE" in Class::MakeMethods for full details.

Declaration Syntax

To declare methods, pass in pairs of a method-type name followed by one or more method names. Valid method-type names for this package are listed in "METHOD GENERATOR TYPES".

See "Declaration Syntax" in Class::MakeMethods::Standard for more syntax information.

METHOD GENERATOR TYPES ^

new - Constructor

For each method name passed, returns a subroutine with the following characteristics:

Sample declaration and usage:

  package MyObject;
  use Class::MakeMethods::Evaled::Hash (
    new => 'new',
  );
  ...
  
  # Bare constructor
  my $empty = MyObject->new();
  
  # Constructor with initial values
  my $obj = MyObject->new( foo => 'Foozle', bar => 'Barbados' );
  
  # Copy with overriding value
  my $copy = $obj->new( bar => 'Bob' );

scalar - Instance Accessor

For each method name passed, uses a closure to generate a subroutine with the following characteristics:

Sample declaration and usage:

  package MyObject;
  use Class::MakeMethods::Evaled::Hash (
    scalar => 'foo',
  );
  ...
  
  # Store value
  $obj->foo('Foozle');
  
  # Retrieve value
  print $obj->foo;

array - Instance Ref Accessor

For each method name passed, uses a closure to generate a subroutine with the following characteristics:

Sample declaration and usage:

  package MyObject;
  use Class::MakeMethods::Evaled::Hash (
    array => 'bar',
  );
  ...
  
  # Set values by position
  $obj->bar(0 => 'Foozle', 1 => 'Bang!');
  
  # Positions may be overwritten, and in any order
  $obj->bar(2 => 'And Mash', 1 => 'Blah!');
  
  # Retrieve value by position
  print $obj->bar(1);
    
  # Direct access to referenced array
  print scalar @{ $obj->bar() };
  
  # Reset the array contents to empty
  @{ $obj->bar() } = ();

hash - Instance Ref Accessor

For each method name passed, uses a closure to generate a subroutine with the following characteristics:

Sample declaration and usage:

  package MyObject;
  use Class::MakeMethods::Evaled::Hash (
    hash => 'baz',
  );
  ...
  
  # Set values by key
  $obj->baz('foo' => 'Foozle', 'bar' => 'Bang!');
  
  # Values may be overwritten, and in any order
  $obj->baz('broccoli' => 'Blah!', 'foo' => 'Fiddle');
  
  # Retrieve value by key
  print $obj->baz('foo');
  
  # Direct access to referenced hash
  print keys %{ $obj->baz() };
  
  # Reset the hash contents to empty
  @{ $obj->baz() } = ();

SEE ALSO ^

See Class::MakeMethods for general information about this distribution.

See Class::MakeMethods::Evaled for more about this family of subclasses.

syntax highlighting: