NAME
Class::Lego::Constructor - Automated constructor generation
SYNOPSIS
BEGIN {
require Class::Lego::Constructor;
@ISA = qw( Class::Lego::Constructor );
}
__PACKAGE__->mk_constructor0({
magical_number => 42,
timestamp => sub { DateTime->new }, # deferred
});
# the weird name, mk_constructor0, is on purpose while API settles
__PACKAGE__->mk_constructor1({
magical_number => { default => 42 },
timestamp => { default => sub { DateTime->new } },
sort_function => { default_value => sub { $a <=> $b } }, # really a sub
});
DESCRIPTION
NOTE: That module was formely called Class::Constructor::Factory.
It will enter the Class-Lego dist soon.
I like the simplicity of Class::Accessor and friends. With them, creating accessors is a piece of cake. It does give me a default constructor as well.
The case is that this default constructor is not as convenient as the generated accessors. To be precise, I want to specify default values for attributes easily. This module is a tentative solution to this problem.
---
The intent of this module is to augment an existing constructor new
which receives a hash ref argument containing pairs of field names versus their values.
$obj = My::Class->new( { f1 => v1, f2 => v2 } );
When a declared field is omitted from the constructor argument, it can be filled with a default which was declared with mk_constructor0
.
default
default_value
make_simple_constructor