NAME

Object::Pad::ClassAttr::Struct - declare an Object::Pad class to be struct-like

SYNOPSIS

use Object::Pad;
use Object::Pad::ClassAttr::Struct;

class Colour :Struct {
   # These get :param :mutator automatically
   has $red   = 0;
   has $green = 0;
   has $blue  = 0;

   # Additional methods are still permitted
   method lightness {
      return ($red + $green + $blue) / 3;
   }
}

my $cyan = Colour->new( green => 1, blue => 1 );

DESCRIPTION

This module provides a third-party class attribute for Object::Pad-based classes, which applies some attributes automatically to every field added to the class, as a convenient shortcut for making structure-like classes.

CLASS ATTRIBUTES

:Struct

class Name :Struct ... { ... }

Automatically applies the :param and :mutator attributes to every field defined on the class, meaning the constructor will accept parameters for each field to initialise the value, and each field will have an lvalue mutator method.

In addition, the class itself gains the :strict(params) attribute, meaning the constructor will check parameter names and throw an exception for unrecognised names.

AUTHOR

Paul Evans <leonerd@leonerd.org.uk>