Kelp::Base - Simple lazy attributes


    use Kelp::Base;

    attr source => 'dbi:mysql:users';
    attr user   => 'test';
    attr pass   => 'secret';
    attr opts   =>  sub { { PrintError => 1, RaiseError => 1 } };

    attr dbh => sub {
        my $self = shift;
        DBI->connect( $self->sourse, $self->user, $self->pass, $self->opts );

    # Later ...
    sub do_stuff {
        my $self = shift;
        $self->dbh->do('DELETE FROM accounts');


    use Kelp::Base 'Module::Name';    # Extend Module::Name


    use Kelp::Base -strict;    # Only use strict, warnings and v5.10
                                  # No magic


This module provides simple lazy attributes.


Some users will naturally want to ask "Why not use Moose/Mouse/Moo/Mo?". The answer is that the Kelp web framework needs lazy attributes, but the author wanted to keep the code light and object manager agnostic. This allows the users of the framework to choose an object manager to their liking. There is nothing more annoying than a module that forces you to use Moose when you are perfectly fine with Moo or Mo, for example.


    use Kelp::Base;

The above will automatically include strict, warnings and v5.10. It will also inject a new sub in the current class called attr.

    attr name1 => 1;                      # Fixed value
    attr name2 => sub { [ 1, 2, 3 ] };    # Array
    attr name3 => sub {


    say $self->name1;               # 1
    $self->name2( [ 6, 7, 8 ] );    # Set new value

All those attributes will be available for reading and writing in each instance of the current class. If you want to create a read-only attribute, prefix its name with a dash.

    attr -readonly => "something";

    # Later
    say $self->readonly;           # something
    $self->readonly("nothing");    # no change


Kelp, Moose, Moo, Mo, Any::Moose