Moose::Meta::Attribute::Native::Trait::Counter(3pm)

SYNOPSIS

  package MyHomePage;
  use Moose;
  has 'counter' => (
      traits  => ['Counter'],
      is      => 'ro',
      isa     => 'Num',
      default => 0,
      handles => {
          inc_counter   => 'inc',
          dec_counter   => 'dec',
          reset_counter => 'reset',
      },
  );
  my $page = MyHomePage->new();
  $page->inc_counter;    # same as $page->counter( $page->counter + 1 );
  $page->dec_counter;    # same as $page->counter( $page->counter - 1 );
  my $count_by_twos = 2;
  $page->inc_counter($count_by_twos);

DESCRIPTION

This trait provides native delegation methods for counters. A counter can be any sort of number (integer or not). The delegation methods allow you to increment, decrement, or reset the value.

DEFAULT TYPE

If you don't provide an "isa" value for your attribute, it will default to "Num".

PROVIDED METHODS

• set($value)

  Sets the counter to the specified value and returns the new value.

  This method requires a single argument.

• inc
• inc($arg)

  Increases the attribute value by the amount of the argument, or by 1 if no argument is given. This method returns the new value.

  This method accepts a single argument.

• dec
• dec($arg)

  Decreases the attribute value by the amount of the argument, or by 1 if no argument is given. This method returns the new value.

  This method accepts a single argument.

• reset

  Resets the value stored in this slot to its default value, and returns the new value.

BUGS

See "BUGS" in Moose for details on reporting bugs.